/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/nzb-file-symm.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-10 22:03:48,398 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-10 22:03:48,400 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-10 22:03:48,428 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-03-10 22:03:48,475 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 [2021-03-10 22:03:48,501 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-10 22:03:48,501 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-10 22:03:48,502 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-03-10 22:03:48,502 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-03-10 22:03:48,504 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-10 22:03:48,504 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-10 22:03:48,504 INFO L138 SettingsManager]: * Use SBE=true [2021-03-10 22:03:48,504 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-10 22:03:48,504 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-10 22:03:48,504 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-10 22:03:48,505 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-10 22:03:48,505 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-10 22:03:48,505 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-10 22:03:48,505 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-10 22:03:48,505 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-10 22:03:48,506 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-10 22:03:48,506 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-10 22:03:48,506 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-10 22:03:48,506 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-10 22:03:48,506 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-10 22:03:48,506 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-10 22:03:48,506 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-10 22:03:48,506 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-10 22:03:48,506 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-10 22:03:48,507 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-10 22:03:48,507 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-10 22:03:48,507 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-10 22:03:48,507 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-10 22:03:48,507 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-10 22:03:48,507 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-03-10 22:03:48,507 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-03-10 22:03:48,507 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-10 22:03:48,746 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-10 22:03:48,761 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-10 22:03:48,762 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-10 22:03:48,763 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-10 22:03:48,764 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-10 22:03:48,764 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/nzb-file-symm.wvr.bpl [2021-03-10 22:03:48,764 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/nzb-file-symm.wvr.bpl' [2021-03-10 22:03:48,798 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-10 22:03:48,802 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-10 22:03:48,803 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-10 22:03:48,803 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-10 22:03:48,803 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-10 22:03:48,811 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "nzb-file-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:03:48" (1/1) ... [2021-03-10 22:03:48,823 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "nzb-file-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:03:48" (1/1) ... [2021-03-10 22:03:48,830 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-10 22:03:48,831 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-10 22:03:48,831 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-10 22:03:48,832 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-10 22:03:48,837 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "nzb-file-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:03:48" (1/1) ... [2021-03-10 22:03:48,837 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "nzb-file-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:03:48" (1/1) ... [2021-03-10 22:03:48,838 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "nzb-file-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:03:48" (1/1) ... [2021-03-10 22:03:48,838 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "nzb-file-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:03:48" (1/1) ... [2021-03-10 22:03:48,850 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "nzb-file-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:03:48" (1/1) ... [2021-03-10 22:03:48,852 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "nzb-file-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:03:48" (1/1) ... [2021-03-10 22:03:48,856 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "nzb-file-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:03:48" (1/1) ... [2021-03-10 22:03:48,858 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-10 22:03:48,859 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-10 22:03:48,859 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-10 22:03:48,859 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-10 22:03:48,860 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "nzb-file-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:03:48" (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 [2021-03-10 22:03:48,911 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-03-10 22:03:48,912 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-03-10 22:03:48,912 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-03-10 22:03:48,912 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-03-10 22:03:48,912 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-03-10 22:03:48,912 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-03-10 22:03:48,912 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-10 22:03:48,912 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-10 22:03:48,912 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-10 22:03:48,913 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-10 22:03:49,271 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-10 22:03:49,271 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-03-10 22:03:49,273 INFO L202 PluginConnector]: Adding new model nzb-file-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 10:03:49 BoogieIcfgContainer [2021-03-10 22:03:49,273 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-10 22:03:49,274 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-10 22:03:49,274 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-10 22:03:49,276 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-10 22:03:49,276 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nzb-file-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 10:03:48" (1/2) ... [2021-03-10 22:03:49,276 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59fc36f7 and model type nzb-file-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.03 10:03:49, skipping insertion in model container [2021-03-10 22:03:49,277 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nzb-file-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 10:03:49" (2/2) ... [2021-03-10 22:03:49,279 INFO L111 eAbstractionObserver]: Analyzing ICFG nzb-file-symm.wvr.bpl [2021-03-10 22:03:49,282 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-03-10 22:03:49,283 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-10 22:03:49,286 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-10 22:03:49,286 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-10 22:03:49,327 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-03-10 22:03:49,338 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-03-10 22:03:49,362 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-10 22:03:49,362 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-10 22:03:49,362 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-10 22:03:49,362 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-10 22:03:49,362 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-10 22:03:49,362 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-10 22:03:49,362 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-10 22:03:49,362 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-10 22:03:49,369 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 23 places, 20 transitions, 56 flow [2021-03-10 22:03:49,377 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 30 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:49,378 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:49,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-03-10 22:03:49,382 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:49,382 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:49,382 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:49,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:49,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1169398602, now seen corresponding path program 1 times [2021-03-10 22:03:49,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:49,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397627181] [2021-03-10 22:03:49,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:49,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:49,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:49,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397627181] [2021-03-10 22:03:49,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 22:03:49,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-10 22:03:49,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875474584] [2021-03-10 22:03:49,606 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 22:03:49,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:49,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 22:03:49,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-10 22:03:49,615 INFO L87 Difference]: Start difference. First operand has 30 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:49,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:49,692 INFO L93 Difference]: Finished difference Result 52 states and 96 transitions. [2021-03-10 22:03:49,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-10 22:03:49,693 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-03-10 22:03:49,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:49,710 INFO L225 Difference]: With dead ends: 52 [2021-03-10 22:03:49,710 INFO L226 Difference]: Without dead ends: 40 [2021-03-10 22:03:49,711 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 80.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-10 22:03:49,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-03-10 22:03:49,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 28. [2021-03-10 22:03:49,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:49,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 60 transitions. [2021-03-10 22:03:49,737 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 60 transitions. Word has length 10 [2021-03-10 22:03:49,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:49,738 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 60 transitions. [2021-03-10 22:03:49,738 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:49,738 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 60 transitions. [2021-03-10 22:03:49,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-03-10 22:03:49,738 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:49,738 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:49,739 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-10 22:03:49,739 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:49,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:49,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1342257354, now seen corresponding path program 2 times [2021-03-10 22:03:49,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:49,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833782631] [2021-03-10 22:03:49,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:49,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:49,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:49,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833782631] [2021-03-10 22:03:49,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 22:03:49,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-10 22:03:49,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313141071] [2021-03-10 22:03:49,832 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 22:03:49,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:49,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 22:03:49,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-10 22:03:49,833 INFO L87 Difference]: Start difference. First operand 28 states and 60 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:49,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:49,894 INFO L93 Difference]: Finished difference Result 48 states and 88 transitions. [2021-03-10 22:03:49,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-10 22:03:49,895 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-03-10 22:03:49,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:49,895 INFO L225 Difference]: With dead ends: 48 [2021-03-10 22:03:49,896 INFO L226 Difference]: Without dead ends: 41 [2021-03-10 22:03:49,896 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 65.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-10 22:03:49,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-03-10 22:03:49,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2021-03-10 22:03:49,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:49,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 63 transitions. [2021-03-10 22:03:49,900 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 63 transitions. Word has length 10 [2021-03-10 22:03:49,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:49,900 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 63 transitions. [2021-03-10 22:03:49,900 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:49,900 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 63 transitions. [2021-03-10 22:03:49,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-03-10 22:03:49,901 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:49,901 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:49,901 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-10 22:03:49,901 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:49,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:49,902 INFO L82 PathProgramCache]: Analyzing trace with hash -1169517215, now seen corresponding path program 1 times [2021-03-10 22:03:49,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:49,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312201370] [2021-03-10 22:03:49,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:49,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:49,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:49,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312201370] [2021-03-10 22:03:49,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 22:03:49,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-10 22:03:49,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490362242] [2021-03-10 22:03:49,914 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-10 22:03:49,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:49,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-10 22:03:49,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-10 22:03:49,915 INFO L87 Difference]: Start difference. First operand 30 states and 63 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:49,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:49,919 INFO L93 Difference]: Finished difference Result 35 states and 74 transitions. [2021-03-10 22:03:49,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-10 22:03:49,920 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-03-10 22:03:49,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:49,920 INFO L225 Difference]: With dead ends: 35 [2021-03-10 22:03:49,920 INFO L226 Difference]: Without dead ends: 35 [2021-03-10 22:03:49,921 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-10 22:03:49,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-03-10 22:03:49,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-03-10 22:03:49,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 2.176470588235294) internal successors, (74), 34 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:49,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 74 transitions. [2021-03-10 22:03:49,926 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 74 transitions. Word has length 11 [2021-03-10 22:03:49,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:49,926 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 74 transitions. [2021-03-10 22:03:49,927 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:49,927 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 74 transitions. [2021-03-10 22:03:49,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-03-10 22:03:49,927 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:49,927 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:49,927 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-10 22:03:49,927 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:49,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:49,928 INFO L82 PathProgramCache]: Analyzing trace with hash 1198603722, now seen corresponding path program 1 times [2021-03-10 22:03:49,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:49,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687128256] [2021-03-10 22:03:49,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:49,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:49,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:49,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687128256] [2021-03-10 22:03:49,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 22:03:49,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-10 22:03:49,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860915253] [2021-03-10 22:03:49,940 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-10 22:03:49,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:49,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-10 22:03:49,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-10 22:03:49,940 INFO L87 Difference]: Start difference. First operand 35 states and 74 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:49,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:49,946 INFO L93 Difference]: Finished difference Result 35 states and 66 transitions. [2021-03-10 22:03:49,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-10 22:03:49,946 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-03-10 22:03:49,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:49,946 INFO L225 Difference]: With dead ends: 35 [2021-03-10 22:03:49,947 INFO L226 Difference]: Without dead ends: 35 [2021-03-10 22:03:49,947 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-10 22:03:49,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-03-10 22:03:49,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2021-03-10 22:03:49,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.96875) internal successors, (63), 32 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:49,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 63 transitions. [2021-03-10 22:03:49,950 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 63 transitions. Word has length 11 [2021-03-10 22:03:49,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:49,950 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 63 transitions. [2021-03-10 22:03:49,950 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:49,950 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 63 transitions. [2021-03-10 22:03:49,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-03-10 22:03:49,950 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:49,951 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:49,951 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-10 22:03:49,951 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:49,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:49,951 INFO L82 PathProgramCache]: Analyzing trace with hash -1658290196, now seen corresponding path program 1 times [2021-03-10 22:03:49,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:49,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95776378] [2021-03-10 22:03:49,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:49,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:49,975 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:03:49,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95776378] [2021-03-10 22:03:49,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 22:03:49,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-10 22:03:49,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648430257] [2021-03-10 22:03:49,976 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-10 22:03:49,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:49,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-10 22:03:49,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-10 22:03:49,977 INFO L87 Difference]: Start difference. First operand 33 states and 63 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:49,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:49,985 INFO L93 Difference]: Finished difference Result 35 states and 64 transitions. [2021-03-10 22:03:49,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-10 22:03:49,986 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-03-10 22:03:49,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:49,987 INFO L225 Difference]: With dead ends: 35 [2021-03-10 22:03:49,987 INFO L226 Difference]: Without dead ends: 33 [2021-03-10 22:03:49,987 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-10 22:03:49,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-03-10 22:03:49,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-03-10 22:03:49,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.9375) internal successors, (62), 32 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:49,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 62 transitions. [2021-03-10 22:03:49,991 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 62 transitions. Word has length 12 [2021-03-10 22:03:49,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:49,992 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 62 transitions. [2021-03-10 22:03:49,992 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:49,992 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 62 transitions. [2021-03-10 22:03:49,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-03-10 22:03:49,992 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:49,992 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:49,992 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-03-10 22:03:49,993 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:49,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:49,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1206692648, now seen corresponding path program 1 times [2021-03-10 22:03:49,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:49,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738673701] [2021-03-10 22:03:49,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:49,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:50,027 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:03:50,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738673701] [2021-03-10 22:03:50,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 22:03:50,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-10 22:03:50,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594796876] [2021-03-10 22:03:50,028 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-10 22:03:50,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:50,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-10 22:03:50,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-10 22:03:50,029 INFO L87 Difference]: Start difference. First operand 33 states and 62 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:50,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:50,033 INFO L93 Difference]: Finished difference Result 39 states and 74 transitions. [2021-03-10 22:03:50,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-10 22:03:50,033 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-03-10 22:03:50,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:50,034 INFO L225 Difference]: With dead ends: 39 [2021-03-10 22:03:50,034 INFO L226 Difference]: Without dead ends: 39 [2021-03-10 22:03:50,034 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-10 22:03:50,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-03-10 22:03:50,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-03-10 22:03:50,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.9473684210526316) internal successors, (74), 38 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:50,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 74 transitions. [2021-03-10 22:03:50,036 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 74 transitions. Word has length 13 [2021-03-10 22:03:50,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:50,036 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 74 transitions. [2021-03-10 22:03:50,037 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:50,037 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 74 transitions. [2021-03-10 22:03:50,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 22:03:50,037 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:50,037 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:50,037 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-03-10 22:03:50,037 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:50,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:50,038 INFO L82 PathProgramCache]: Analyzing trace with hash -2083951382, now seen corresponding path program 1 times [2021-03-10 22:03:50,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:50,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877574111] [2021-03-10 22:03:50,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:50,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:50,226 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:50,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877574111] [2021-03-10 22:03:50,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296706757] [2021-03-10 22:03:50,227 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 [2021-03-10 22:03:50,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:50,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 22:03:50,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:50,650 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:50,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:50,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-10 22:03:50,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754339796] [2021-03-10 22:03:50,651 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:03:50,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:50,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:03:50,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:03:50,652 INFO L87 Difference]: Start difference. First operand 39 states and 74 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:51,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:51,565 INFO L93 Difference]: Finished difference Result 106 states and 207 transitions. [2021-03-10 22:03:51,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:03:51,565 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-03-10 22:03:51,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:51,566 INFO L225 Difference]: With dead ends: 106 [2021-03-10 22:03:51,566 INFO L226 Difference]: Without dead ends: 81 [2021-03-10 22:03:51,566 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 985.9ms TimeCoverageRelationStatistics Valid=140, Invalid=412, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:03:51,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-03-10 22:03:51,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 43. [2021-03-10 22:03:51,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 2.0) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:51,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 84 transitions. [2021-03-10 22:03:51,570 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 84 transitions. Word has length 14 [2021-03-10 22:03:51,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:51,570 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 84 transitions. [2021-03-10 22:03:51,570 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:51,570 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 84 transitions. [2021-03-10 22:03:51,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 22:03:51,570 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:51,570 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:51,779 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-03-10 22:03:51,779 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:51,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:51,780 INFO L82 PathProgramCache]: Analyzing trace with hash 417341116, now seen corresponding path program 2 times [2021-03-10 22:03:51,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:51,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100747467] [2021-03-10 22:03:51,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:51,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:51,948 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:51,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100747467] [2021-03-10 22:03:51,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835785699] [2021-03-10 22:03:51,948 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 [2021-03-10 22:03:51,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:03:51,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:51,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 22:03:51,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:52,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:03:52,374 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:52,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:03:52,381 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:52,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:03:52,385 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:52,408 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:03:52,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:03:52,415 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:52,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:03:52,419 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:52,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:03:52,422 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:52,442 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:03:52,444 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:03:52,444 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:88, output treesize:52 [2021-03-10 22:03:52,549 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:52,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:52,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-10 22:03:52,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866410156] [2021-03-10 22:03:52,550 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:03:52,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:52,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:03:52,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:03:52,551 INFO L87 Difference]: Start difference. First operand 43 states and 84 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:52,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:52,773 INFO L93 Difference]: Finished difference Result 68 states and 130 transitions. [2021-03-10 22:03:52,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:03:52,773 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-03-10 22:03:52,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:52,775 INFO L225 Difference]: With dead ends: 68 [2021-03-10 22:03:52,775 INFO L226 Difference]: Without dead ends: 55 [2021-03-10 22:03:52,775 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 390.6ms TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:03:52,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-03-10 22:03:52,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 45. [2021-03-10 22:03:52,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 2.0) internal successors, (88), 44 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:52,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 88 transitions. [2021-03-10 22:03:52,789 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 88 transitions. Word has length 14 [2021-03-10 22:03:52,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:52,790 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 88 transitions. [2021-03-10 22:03:52,790 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:52,790 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 88 transitions. [2021-03-10 22:03:52,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 22:03:52,791 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:52,791 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:53,007 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:53,007 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:53,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:53,007 INFO L82 PathProgramCache]: Analyzing trace with hash -61943560, now seen corresponding path program 3 times [2021-03-10 22:03:53,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:53,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699431640] [2021-03-10 22:03:53,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:53,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:53,215 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:53,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699431640] [2021-03-10 22:03:53,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576587546] [2021-03-10 22:03:53,216 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 [2021-03-10 22:03:53,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:03:53,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:53,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 22:03:53,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:53,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:03:53,448 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:53,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:03:53,452 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:53,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:03:53,457 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:53,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:03:53,464 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:53,513 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:03:53,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:03:53,521 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:53,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:03:53,532 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:53,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:03:53,537 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:53,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:03:53,541 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:53,580 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:03:53,587 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:03:53,587 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:139, output treesize:83 [2021-03-10 22:03:53,735 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:53,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:53,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-10 22:03:53,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124497716] [2021-03-10 22:03:53,736 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:03:53,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:53,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:03:53,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:03:53,737 INFO L87 Difference]: Start difference. First operand 45 states and 88 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:53,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:53,908 INFO L93 Difference]: Finished difference Result 63 states and 117 transitions. [2021-03-10 22:03:53,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 22:03:53,908 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-03-10 22:03:53,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:53,909 INFO L225 Difference]: With dead ends: 63 [2021-03-10 22:03:53,909 INFO L226 Difference]: Without dead ends: 51 [2021-03-10 22:03:53,909 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 362.0ms TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:03:53,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-03-10 22:03:53,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 46. [2021-03-10 22:03:53,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 2.0) internal successors, (90), 45 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:53,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 90 transitions. [2021-03-10 22:03:53,911 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 90 transitions. Word has length 14 [2021-03-10 22:03:53,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:53,911 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 90 transitions. [2021-03-10 22:03:53,911 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:53,911 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 90 transitions. [2021-03-10 22:03:53,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 22:03:53,912 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:53,912 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:54,128 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:54,129 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:54,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:54,130 INFO L82 PathProgramCache]: Analyzing trace with hash -597173362, now seen corresponding path program 4 times [2021-03-10 22:03:54,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:54,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730845909] [2021-03-10 22:03:54,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:54,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:54,344 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:54,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730845909] [2021-03-10 22:03:54,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210718247] [2021-03-10 22:03:54,344 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 [2021-03-10 22:03:54,368 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:03:54,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:54,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 22:03:54,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:54,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:03:54,604 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:54,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:03:54,608 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:54,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:03:54,612 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:54,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:03:54,616 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:54,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:03:54,623 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:54,626 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:03:54,627 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:54,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:03:54,631 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:54,700 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:03:54,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:03:54,704 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:54,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:03:54,709 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:54,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:03:54,713 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:54,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:03:54,716 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:54,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:03:54,722 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:54,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:03:54,726 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:54,796 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:03:54,798 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-03-10 22:03:54,798 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 3 variables, input treesize:233, output treesize:117 [2021-03-10 22:03:54,971 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:54,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:54,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-10 22:03:54,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086755462] [2021-03-10 22:03:54,974 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:03:54,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:54,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:03:54,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:03:54,974 INFO L87 Difference]: Start difference. First operand 46 states and 90 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:55,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:55,227 INFO L93 Difference]: Finished difference Result 75 states and 146 transitions. [2021-03-10 22:03:55,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:03:55,228 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-03-10 22:03:55,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:55,228 INFO L225 Difference]: With dead ends: 75 [2021-03-10 22:03:55,228 INFO L226 Difference]: Without dead ends: 63 [2021-03-10 22:03:55,228 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 477.6ms TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:03:55,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-03-10 22:03:55,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 49. [2021-03-10 22:03:55,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 2.0) internal successors, (96), 48 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:55,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 96 transitions. [2021-03-10 22:03:55,230 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 96 transitions. Word has length 14 [2021-03-10 22:03:55,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:55,230 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 96 transitions. [2021-03-10 22:03:55,230 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:55,231 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 96 transitions. [2021-03-10 22:03:55,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 22:03:55,231 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:55,231 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:55,443 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:55,443 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:55,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:55,443 INFO L82 PathProgramCache]: Analyzing trace with hash 682715498, now seen corresponding path program 5 times [2021-03-10 22:03:55,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:55,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153828689] [2021-03-10 22:03:55,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:55,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:55,562 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:55,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153828689] [2021-03-10 22:03:55,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57396341] [2021-03-10 22:03:55,573 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 [2021-03-10 22:03:55,597 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:03:55,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:55,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 22:03:55,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:55,794 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:55,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:55,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-03-10 22:03:55,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525532708] [2021-03-10 22:03:55,795 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:03:55,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:55,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:03:55,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:03:55,796 INFO L87 Difference]: Start difference. First operand 49 states and 96 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:56,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:56,113 INFO L93 Difference]: Finished difference Result 70 states and 134 transitions. [2021-03-10 22:03:56,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:03:56,114 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-03-10 22:03:56,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:56,114 INFO L225 Difference]: With dead ends: 70 [2021-03-10 22:03:56,114 INFO L226 Difference]: Without dead ends: 57 [2021-03-10 22:03:56,114 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 433.6ms TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:03:56,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-03-10 22:03:56,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 50. [2021-03-10 22:03:56,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 2.0) internal successors, (98), 49 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:56,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 98 transitions. [2021-03-10 22:03:56,117 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 98 transitions. Word has length 14 [2021-03-10 22:03:56,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:56,117 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 98 transitions. [2021-03-10 22:03:56,117 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:56,117 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 98 transitions. [2021-03-10 22:03:56,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 22:03:56,117 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:56,117 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:56,331 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-03-10 22:03:56,331 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:56,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:56,331 INFO L82 PathProgramCache]: Analyzing trace with hash 203430822, now seen corresponding path program 6 times [2021-03-10 22:03:56,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:56,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744053349] [2021-03-10 22:03:56,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:56,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:56,470 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:56,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744053349] [2021-03-10 22:03:56,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312917860] [2021-03-10 22:03:56,471 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:56,501 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:03:56,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:56,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 22:03:56,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:56,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:03:56,739 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:56,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:03:56,743 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:56,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:03:56,748 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:56,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:03:56,753 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:56,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:03:56,757 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:56,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:03:56,761 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:56,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:03:56,765 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:56,908 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2021-03-10 22:03:56,909 INFO L628 ElimStorePlain]: treesize reduction 34, result has 84.0 percent of original size [2021-03-10 22:03:56,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:03:56,913 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:56,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:03:56,917 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:56,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:03:56,921 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:56,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:03:56,925 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:56,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:03:56,929 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:56,932 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 6 treesize of output 2 [2021-03-10 22:03:56,933 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:56,990 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:03:56,992 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-03-10 22:03:56,992 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 3 variables, input treesize:249, output treesize:129 [2021-03-10 22:03:57,145 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:57,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:57,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-10 22:03:57,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779040747] [2021-03-10 22:03:57,146 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:03:57,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:57,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:03:57,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:03:57,147 INFO L87 Difference]: Start difference. First operand 50 states and 98 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:57,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:57,331 INFO L93 Difference]: Finished difference Result 88 states and 158 transitions. [2021-03-10 22:03:57,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:03:57,332 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-03-10 22:03:57,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:57,332 INFO L225 Difference]: With dead ends: 88 [2021-03-10 22:03:57,332 INFO L226 Difference]: Without dead ends: 69 [2021-03-10 22:03:57,332 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 394.2ms TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:03:57,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-03-10 22:03:57,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 52. [2021-03-10 22:03:57,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 2.0392156862745097) internal successors, (104), 51 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:57,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 104 transitions. [2021-03-10 22:03:57,336 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 104 transitions. Word has length 14 [2021-03-10 22:03:57,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:57,336 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 104 transitions. [2021-03-10 22:03:57,336 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:57,336 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 104 transitions. [2021-03-10 22:03:57,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 22:03:57,337 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:57,337 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:57,547 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:57,547 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:57,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:57,547 INFO L82 PathProgramCache]: Analyzing trace with hash -331798980, now seen corresponding path program 7 times [2021-03-10 22:03:57,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:57,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135253360] [2021-03-10 22:03:57,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:57,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:57,684 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:57,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135253360] [2021-03-10 22:03:57,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298341027] [2021-03-10 22:03:57,684 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 22:03:57,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:57,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 22:03:57,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:57,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:03:57,886 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:57,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:03:57,889 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:57,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:03:57,893 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:57,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:03:57,897 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:57,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:03:57,900 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:57,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:03:57,907 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:57,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:03:57,911 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:58,056 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-03-10 22:03:58,057 INFO L628 ElimStorePlain]: treesize reduction 30, result has 84.8 percent of original size [2021-03-10 22:03:58,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:03:58,061 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:58,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:03:58,065 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:58,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:03:58,068 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:58,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:03:58,072 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:58,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:03:58,076 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:58,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:03:58,080 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:03:58,137 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:03:58,139 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-03-10 22:03:58,139 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 3 variables, input treesize:233, output treesize:117 [2021-03-10 22:03:58,299 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:58,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:58,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-10 22:03:58,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830286955] [2021-03-10 22:03:58,300 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:03:58,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:58,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:03:58,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:03:58,301 INFO L87 Difference]: Start difference. First operand 52 states and 104 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:58,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:58,645 INFO L93 Difference]: Finished difference Result 119 states and 219 transitions. [2021-03-10 22:03:58,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:03:58,645 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-03-10 22:03:58,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:58,646 INFO L225 Difference]: With dead ends: 119 [2021-03-10 22:03:58,646 INFO L226 Difference]: Without dead ends: 93 [2021-03-10 22:03:58,646 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 531.1ms TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:03:58,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-03-10 22:03:58,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 55. [2021-03-10 22:03:58,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 2.0925925925925926) internal successors, (113), 54 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:58,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 113 transitions. [2021-03-10 22:03:58,648 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 113 transitions. Word has length 14 [2021-03-10 22:03:58,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:58,648 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 113 transitions. [2021-03-10 22:03:58,648 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:58,648 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 113 transitions. [2021-03-10 22:03:58,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 22:03:58,649 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:58,649 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:58,863 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:58,863 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:58,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:58,863 INFO L82 PathProgramCache]: Analyzing trace with hash 1350037930, now seen corresponding path program 8 times [2021-03-10 22:03:58,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:58,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908623998] [2021-03-10 22:03:58,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:58,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:58,997 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:58,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908623998] [2021-03-10 22:03:58,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042530100] [2021-03-10 22:03:58,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:59,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:03:59,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:59,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 22:03:59,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:59,264 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:59,264 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:59,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-03-10 22:03:59,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636759740] [2021-03-10 22:03:59,264 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:03:59,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:59,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:03:59,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:03:59,265 INFO L87 Difference]: Start difference. First operand 55 states and 113 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:59,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:59,555 INFO L93 Difference]: Finished difference Result 98 states and 188 transitions. [2021-03-10 22:03:59,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:03:59,555 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-03-10 22:03:59,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:59,556 INFO L225 Difference]: With dead ends: 98 [2021-03-10 22:03:59,556 INFO L226 Difference]: Without dead ends: 86 [2021-03-10 22:03:59,556 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 428.2ms TimeCoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:03:59,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-03-10 22:03:59,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 58. [2021-03-10 22:03:59,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.087719298245614) internal successors, (119), 57 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:59,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 119 transitions. [2021-03-10 22:03:59,558 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 119 transitions. Word has length 14 [2021-03-10 22:03:59,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:59,558 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 119 transitions. [2021-03-10 22:03:59,558 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:59,558 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 119 transitions. [2021-03-10 22:03:59,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 22:03:59,559 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:59,559 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:03:59,759 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:59,759 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:03:59,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:03:59,760 INFO L82 PathProgramCache]: Analyzing trace with hash -1533970817, now seen corresponding path program 9 times [2021-03-10 22:03:59,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:03:59,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345770673] [2021-03-10 22:03:59,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:03:59,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:03:59,797 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:59,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345770673] [2021-03-10 22:03:59,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848762842] [2021-03-10 22:03:59,797 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) [2021-03-10 22:03:59,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:03:59,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:03:59,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:03:59,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:03:59,862 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:03:59,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:03:59,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-03-10 22:03:59,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012416389] [2021-03-10 22:03:59,862 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 22:03:59,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:03:59,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 22:03:59,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-03-10 22:03:59,863 INFO L87 Difference]: Start difference. First operand 58 states and 119 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:59,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:03:59,917 INFO L93 Difference]: Finished difference Result 89 states and 175 transitions. [2021-03-10 22:03:59,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:03:59,918 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 22:03:59,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:03:59,918 INFO L225 Difference]: With dead ends: 89 [2021-03-10 22:03:59,919 INFO L226 Difference]: Without dead ends: 89 [2021-03-10 22:03:59,920 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 48.2ms TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:03:59,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-03-10 22:03:59,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 62. [2021-03-10 22:03:59,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.081967213114754) internal successors, (127), 61 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) [2021-03-10 22:03:59,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 127 transitions. [2021-03-10 22:03:59,927 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 127 transitions. Word has length 15 [2021-03-10 22:03:59,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:03:59,927 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 127 transitions. [2021-03-10 22:03:59,927 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:03:59,927 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 127 transitions. [2021-03-10 22:03:59,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 22:03:59,931 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:03:59,931 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:00,148 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:00,148 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:00,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:00,148 INFO L82 PathProgramCache]: Analyzing trace with hash 967321681, now seen corresponding path program 10 times [2021-03-10 22:04:00,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:00,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060559865] [2021-03-10 22:04:00,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:00,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:00,189 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:00,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060559865] [2021-03-10 22:04:00,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267863038] [2021-03-10 22:04:00,190 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 22:04:00,222 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:04:00,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:00,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 22:04:00,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:00,262 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:00,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:00,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-03-10 22:04:00,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100734055] [2021-03-10 22:04:00,263 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 22:04:00,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:00,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 22:04:00,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-03-10 22:04:00,263 INFO L87 Difference]: Start difference. First operand 62 states and 127 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:00,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:00,323 INFO L93 Difference]: Finished difference Result 80 states and 162 transitions. [2021-03-10 22:04:00,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:04:00,324 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 22:04:00,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:00,324 INFO L225 Difference]: With dead ends: 80 [2021-03-10 22:04:00,324 INFO L226 Difference]: Without dead ends: 80 [2021-03-10 22:04:00,324 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 52.8ms TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:04:00,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-03-10 22:04:00,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 62. [2021-03-10 22:04:00,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.081967213114754) internal successors, (127), 61 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) [2021-03-10 22:04:00,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 127 transitions. [2021-03-10 22:04:00,328 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 127 transitions. Word has length 15 [2021-03-10 22:04:00,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:00,329 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 127 transitions. [2021-03-10 22:04:00,329 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:00,329 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 127 transitions. [2021-03-10 22:04:00,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 22:04:00,329 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:00,329 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:00,543 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-03-10 22:04:00,543 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:00,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:00,544 INFO L82 PathProgramCache]: Analyzing trace with hash -47192797, now seen corresponding path program 11 times [2021-03-10 22:04:00,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:00,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852053487] [2021-03-10 22:04:00,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:00,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:00,593 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:00,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852053487] [2021-03-10 22:04:00,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126509702] [2021-03-10 22:04:00,593 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:00,619 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:04:00,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:00,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 22:04:00,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:00,682 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:00,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:00,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-03-10 22:04:00,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230454006] [2021-03-10 22:04:00,683 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 22:04:00,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:00,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 22:04:00,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-03-10 22:04:00,683 INFO L87 Difference]: Start difference. First operand 62 states and 127 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:00,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:00,764 INFO L93 Difference]: Finished difference Result 88 states and 169 transitions. [2021-03-10 22:04:00,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:04:00,765 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 22:04:00,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:00,765 INFO L225 Difference]: With dead ends: 88 [2021-03-10 22:04:00,765 INFO L226 Difference]: Without dead ends: 88 [2021-03-10 22:04:00,766 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 85.4ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:04:00,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-03-10 22:04:00,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 62. [2021-03-10 22:04:00,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.081967213114754) internal successors, (127), 61 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) [2021-03-10 22:04:00,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 127 transitions. [2021-03-10 22:04:00,767 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 127 transitions. Word has length 15 [2021-03-10 22:04:00,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:00,768 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 127 transitions. [2021-03-10 22:04:00,768 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:00,768 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 127 transitions. [2021-03-10 22:04:00,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 22:04:00,768 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:00,768 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:00,979 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-03-10 22:04:00,979 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:00,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:00,980 INFO L82 PathProgramCache]: Analyzing trace with hash -15245844, now seen corresponding path program 12 times [2021-03-10 22:04:00,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:00,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290950924] [2021-03-10 22:04:00,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:00,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:01,029 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:01,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290950924] [2021-03-10 22:04:01,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122057811] [2021-03-10 22:04:01,029 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:01,076 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:04:01,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:01,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 22:04:01,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:01,161 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:01,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:01,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-10 22:04:01,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856617779] [2021-03-10 22:04:01,163 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 22:04:01,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:01,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 22:04:01,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:04:01,163 INFO L87 Difference]: Start difference. First operand 62 states and 127 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:01,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:01,381 INFO L93 Difference]: Finished difference Result 99 states and 186 transitions. [2021-03-10 22:04:01,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:04:01,382 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 22:04:01,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:01,382 INFO L225 Difference]: With dead ends: 99 [2021-03-10 22:04:01,382 INFO L226 Difference]: Without dead ends: 96 [2021-03-10 22:04:01,383 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 217.0ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:04:01,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-03-10 22:04:01,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 66. [2021-03-10 22:04:01,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.076923076923077) internal successors, (135), 65 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:01,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 135 transitions. [2021-03-10 22:04:01,385 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 135 transitions. Word has length 15 [2021-03-10 22:04:01,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:01,385 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 135 transitions. [2021-03-10 22:04:01,385 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:01,386 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 135 transitions. [2021-03-10 22:04:01,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 22:04:01,386 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:01,386 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:01,592 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:01,592 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:01,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:01,593 INFO L82 PathProgramCache]: Analyzing trace with hash -494530520, now seen corresponding path program 13 times [2021-03-10 22:04:01,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:01,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958475884] [2021-03-10 22:04:01,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:01,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:01,637 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:01,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958475884] [2021-03-10 22:04:01,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563218821] [2021-03-10 22:04:01,638 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:01,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:01,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 22:04:01,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:01,750 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:01,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:01,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-10 22:04:01,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883221600] [2021-03-10 22:04:01,751 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 22:04:01,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:01,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 22:04:01,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:04:01,752 INFO L87 Difference]: Start difference. First operand 66 states and 135 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:01,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:01,824 INFO L93 Difference]: Finished difference Result 84 states and 165 transitions. [2021-03-10 22:04:01,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 22:04:01,824 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 22:04:01,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:01,825 INFO L225 Difference]: With dead ends: 84 [2021-03-10 22:04:01,825 INFO L226 Difference]: Without dead ends: 84 [2021-03-10 22:04:01,825 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 97.6ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:04:01,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-03-10 22:04:01,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 62. [2021-03-10 22:04:01,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.0655737704918034) internal successors, (126), 61 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) [2021-03-10 22:04:01,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 126 transitions. [2021-03-10 22:04:01,827 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 126 transitions. Word has length 15 [2021-03-10 22:04:01,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:01,827 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 126 transitions. [2021-03-10 22:04:01,827 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:01,827 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 126 transitions. [2021-03-10 22:04:01,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 22:04:01,829 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:01,829 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:02,043 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2021-03-10 22:04:02,043 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:02,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:02,043 INFO L82 PathProgramCache]: Analyzing trace with hash 1824775283, now seen corresponding path program 14 times [2021-03-10 22:04:02,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:02,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504895933] [2021-03-10 22:04:02,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:02,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:02,083 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:02,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504895933] [2021-03-10 22:04:02,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902936648] [2021-03-10 22:04:02,084 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:02,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:04:02,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:02,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 22:04:02,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:02,162 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:02,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:02,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-03-10 22:04:02,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92316314] [2021-03-10 22:04:02,162 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 22:04:02,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:02,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 22:04:02,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-03-10 22:04:02,163 INFO L87 Difference]: Start difference. First operand 62 states and 126 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:02,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:02,218 INFO L93 Difference]: Finished difference Result 71 states and 141 transitions. [2021-03-10 22:04:02,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:04:02,219 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 22:04:02,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:02,220 INFO L225 Difference]: With dead ends: 71 [2021-03-10 22:04:02,220 INFO L226 Difference]: Without dead ends: 69 [2021-03-10 22:04:02,221 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 62.6ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:04:02,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-03-10 22:04:02,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 62. [2021-03-10 22:04:02,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.0491803278688523) internal successors, (125), 61 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:02,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 125 transitions. [2021-03-10 22:04:02,222 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 125 transitions. Word has length 15 [2021-03-10 22:04:02,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:02,222 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 125 transitions. [2021-03-10 22:04:02,222 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:02,222 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 125 transitions. [2021-03-10 22:04:02,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 22:04:02,222 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:02,223 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:02,437 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable223,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:02,438 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:02,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:02,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1774400641, now seen corresponding path program 15 times [2021-03-10 22:04:02,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:02,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122743794] [2021-03-10 22:04:02,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:02,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:02,491 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:02,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122743794] [2021-03-10 22:04:02,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553284699] [2021-03-10 22:04:02,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 22:04:02,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:04:02,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:02,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 22:04:02,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:02,655 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:02,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:02,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-10 22:04:02,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144704048] [2021-03-10 22:04:02,657 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 22:04:02,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:02,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 22:04:02,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:04:02,657 INFO L87 Difference]: Start difference. First operand 62 states and 125 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:02,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:02,694 INFO L93 Difference]: Finished difference Result 77 states and 155 transitions. [2021-03-10 22:04:02,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 22:04:02,694 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 22:04:02,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:02,695 INFO L225 Difference]: With dead ends: 77 [2021-03-10 22:04:02,695 INFO L226 Difference]: Without dead ends: 77 [2021-03-10 22:04:02,695 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 84.8ms TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:04:02,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-03-10 22:04:02,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 62. [2021-03-10 22:04:02,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.0491803278688523) internal successors, (125), 61 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:02,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 125 transitions. [2021-03-10 22:04:02,697 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 125 transitions. Word has length 15 [2021-03-10 22:04:02,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:02,697 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 125 transitions. [2021-03-10 22:04:02,697 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:02,697 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 125 transitions. [2021-03-10 22:04:02,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 22:04:02,697 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:02,697 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:02,898 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:02,898 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:02,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:02,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1506052177, now seen corresponding path program 16 times [2021-03-10 22:04:02,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:02,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986579001] [2021-03-10 22:04:02,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:02,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:02,952 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:02,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986579001] [2021-03-10 22:04:02,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302265520] [2021-03-10 22:04:02,952 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:02,986 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:04:02,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:02,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 22:04:02,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:03,532 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:03,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:03,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-10 22:04:03,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511631928] [2021-03-10 22:04:03,534 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 22:04:03,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:03,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 22:04:03,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:04:03,534 INFO L87 Difference]: Start difference. First operand 62 states and 125 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:03,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:03,570 INFO L93 Difference]: Finished difference Result 82 states and 165 transitions. [2021-03-10 22:04:03,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 22:04:03,571 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 22:04:03,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:03,571 INFO L225 Difference]: With dead ends: 82 [2021-03-10 22:04:03,571 INFO L226 Difference]: Without dead ends: 82 [2021-03-10 22:04:03,572 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 83.6ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:04:03,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-03-10 22:04:03,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 63. [2021-03-10 22:04:03,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.0483870967741935) internal successors, (127), 62 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) [2021-03-10 22:04:03,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 127 transitions. [2021-03-10 22:04:03,574 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 127 transitions. Word has length 15 [2021-03-10 22:04:03,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:03,574 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 127 transitions. [2021-03-10 22:04:03,574 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:03,574 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 127 transitions. [2021-03-10 22:04:03,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 22:04:03,574 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:03,574 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:03,789 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable248,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:03,789 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:03,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:03,790 INFO L82 PathProgramCache]: Analyzing trace with hash 1058714454, now seen corresponding path program 17 times [2021-03-10 22:04:03,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:03,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112111150] [2021-03-10 22:04:03,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:03,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:03,836 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:03,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112111150] [2021-03-10 22:04:03,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505100145] [2021-03-10 22:04:03,837 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:03,864 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:04:03,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:03,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 22:04:03,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:03,974 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:03,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:03,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-10 22:04:03,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566664443] [2021-03-10 22:04:03,974 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 22:04:03,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:03,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 22:04:03,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:04:03,975 INFO L87 Difference]: Start difference. First operand 63 states and 127 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:04,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:04,014 INFO L93 Difference]: Finished difference Result 69 states and 139 transitions. [2021-03-10 22:04:04,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 22:04:04,015 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 22:04:04,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:04,016 INFO L225 Difference]: With dead ends: 69 [2021-03-10 22:04:04,016 INFO L226 Difference]: Without dead ends: 69 [2021-03-10 22:04:04,016 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 99.4ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:04:04,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-03-10 22:04:04,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 61. [2021-03-10 22:04:04,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.05) internal successors, (123), 60 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:04,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 123 transitions. [2021-03-10 22:04:04,018 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 123 transitions. Word has length 15 [2021-03-10 22:04:04,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:04,018 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 123 transitions. [2021-03-10 22:04:04,018 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:04,018 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 123 transitions. [2021-03-10 22:04:04,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 22:04:04,018 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:04,018 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:04,233 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable364 [2021-03-10 22:04:04,233 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:04,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:04,234 INFO L82 PathProgramCache]: Analyzing trace with hash 2093797499, now seen corresponding path program 18 times [2021-03-10 22:04:04,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:04,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534685143] [2021-03-10 22:04:04,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:04,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:04,285 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:04,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534685143] [2021-03-10 22:04:04,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037490479] [2021-03-10 22:04:04,285 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 22:04:04,334 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:04:04,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:04,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 22:04:04,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:04,479 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:04,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:04,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-10 22:04:04,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657105121] [2021-03-10 22:04:04,479 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 22:04:04,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:04,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 22:04:04,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:04:04,481 INFO L87 Difference]: Start difference. First operand 61 states and 123 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:04,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:04,516 INFO L93 Difference]: Finished difference Result 89 states and 171 transitions. [2021-03-10 22:04:04,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 22:04:04,516 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 22:04:04,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:04,517 INFO L225 Difference]: With dead ends: 89 [2021-03-10 22:04:04,517 INFO L226 Difference]: Without dead ends: 89 [2021-03-10 22:04:04,517 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 90.9ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:04:04,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-03-10 22:04:04,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 63. [2021-03-10 22:04:04,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.064516129032258) internal successors, (128), 62 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:04,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 128 transitions. [2021-03-10 22:04:04,519 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 128 transitions. Word has length 15 [2021-03-10 22:04:04,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:04,519 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 128 transitions. [2021-03-10 22:04:04,519 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:04,520 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 128 transitions. [2021-03-10 22:04:04,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 22:04:04,520 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:04,520 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:04,727 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable370 [2021-03-10 22:04:04,727 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:04,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:04,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1646459776, now seen corresponding path program 19 times [2021-03-10 22:04:04,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:04,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756917832] [2021-03-10 22:04:04,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:04,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:04,783 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:04,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756917832] [2021-03-10 22:04:04,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126601959] [2021-03-10 22:04:04,784 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 22:04:04,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:04,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:04,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:05,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:04:05,054 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:05,057 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:05,057 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:05,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:04:05,061 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:05,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:04:05,064 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:05,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:05,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:05,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:04:05,068 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:05,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:05,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:05,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:04:05,072 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:05,074 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:05,075 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:05,076 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:05,077 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:05,129 INFO L628 ElimStorePlain]: treesize reduction 44, result has 42.9 percent of original size [2021-03-10 22:04:05,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:04:05,133 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:05,157 INFO L628 ElimStorePlain]: treesize reduction 1, result has 96.6 percent of original size [2021-03-10 22:04:05,161 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:04:05,161 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 3 variables, input treesize:199, output treesize:12 [2021-03-10 22:04:05,182 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:05,182 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:05,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-10 22:04:05,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237476759] [2021-03-10 22:04:05,183 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 22:04:05,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:05,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 22:04:05,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:04:05,183 INFO L87 Difference]: Start difference. First operand 63 states and 128 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:05,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:05,280 INFO L93 Difference]: Finished difference Result 103 states and 197 transitions. [2021-03-10 22:04:05,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:04:05,280 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 22:04:05,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:05,281 INFO L225 Difference]: With dead ends: 103 [2021-03-10 22:04:05,281 INFO L226 Difference]: Without dead ends: 103 [2021-03-10 22:04:05,281 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 124.1ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:04:05,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-03-10 22:04:05,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 64. [2021-03-10 22:04:05,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.111111111111111) internal successors, (133), 63 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:05,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 133 transitions. [2021-03-10 22:04:05,284 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 133 transitions. Word has length 15 [2021-03-10 22:04:05,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:05,284 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 133 transitions. [2021-03-10 22:04:05,284 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:05,284 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 133 transitions. [2021-03-10 22:04:05,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 22:04:05,284 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:05,284 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:05,499 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable400 [2021-03-10 22:04:05,499 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:05,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:05,499 INFO L82 PathProgramCache]: Analyzing trace with hash 1111229974, now seen corresponding path program 20 times [2021-03-10 22:04:05,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:05,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376211663] [2021-03-10 22:04:05,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:05,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:05,550 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:05,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376211663] [2021-03-10 22:04:05,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133204252] [2021-03-10 22:04:05,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:05,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:04:05,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:05,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 22:04:05,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:05,705 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:05,706 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:05,708 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:05,708 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:05,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:05,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:05,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:04:05,712 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:05,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:05,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:04:05,714 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:05,725 INFO L628 ElimStorePlain]: treesize reduction 4, result has 81.8 percent of original size [2021-03-10 22:04:05,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:04:05,728 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:05,732 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:04:05,734 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:04:05,734 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:114, output treesize:6 [2021-03-10 22:04:05,740 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:05,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:05,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-10 22:04:05,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047090765] [2021-03-10 22:04:05,741 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 22:04:05,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:05,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 22:04:05,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:04:05,741 INFO L87 Difference]: Start difference. First operand 64 states and 133 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:05,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:05,768 INFO L93 Difference]: Finished difference Result 76 states and 153 transitions. [2021-03-10 22:04:05,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 22:04:05,768 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 22:04:05,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:05,768 INFO L225 Difference]: With dead ends: 76 [2021-03-10 22:04:05,768 INFO L226 Difference]: Without dead ends: 76 [2021-03-10 22:04:05,769 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 66.1ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:04:05,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-03-10 22:04:05,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 63. [2021-03-10 22:04:05,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.0806451612903225) internal successors, (129), 62 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:05,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 129 transitions. [2021-03-10 22:04:05,771 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 129 transitions. Word has length 15 [2021-03-10 22:04:05,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:05,771 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 129 transitions. [2021-03-10 22:04:05,771 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:05,771 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 129 transitions. [2021-03-10 22:04:05,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 22:04:05,772 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:05,772 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:05,986 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable491 [2021-03-10 22:04:05,986 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:05,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:05,987 INFO L82 PathProgramCache]: Analyzing trace with hash 746509439, now seen corresponding path program 21 times [2021-03-10 22:04:05,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:05,987 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747880327] [2021-03-10 22:04:05,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:05,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:06,031 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:06,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747880327] [2021-03-10 22:04:06,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326600514] [2021-03-10 22:04:06,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:06,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:04:06,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:06,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 22:04:06,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:06,212 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:06,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:06,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-10 22:04:06,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305182783] [2021-03-10 22:04:06,212 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 22:04:06,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:06,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 22:04:06,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:04:06,213 INFO L87 Difference]: Start difference. First operand 63 states and 129 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:06,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:06,265 INFO L93 Difference]: Finished difference Result 74 states and 147 transitions. [2021-03-10 22:04:06,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 22:04:06,265 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 22:04:06,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:06,266 INFO L225 Difference]: With dead ends: 74 [2021-03-10 22:04:06,266 INFO L226 Difference]: Without dead ends: 70 [2021-03-10 22:04:06,266 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 137.4ms TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:04:06,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-03-10 22:04:06,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 63. [2021-03-10 22:04:06,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.064516129032258) internal successors, (128), 62 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:06,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 128 transitions. [2021-03-10 22:04:06,268 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 128 transitions. Word has length 15 [2021-03-10 22:04:06,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:06,268 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 128 transitions. [2021-03-10 22:04:06,269 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:06,269 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 128 transitions. [2021-03-10 22:04:06,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 22:04:06,270 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:06,270 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:06,483 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable521 [2021-03-10 22:04:06,483 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:06,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:06,483 INFO L82 PathProgramCache]: Analyzing trace with hash -2137729391, now seen corresponding path program 22 times [2021-03-10 22:04:06,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:06,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621592574] [2021-03-10 22:04:06,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:06,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:06,532 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:06,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621592574] [2021-03-10 22:04:06,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782178533] [2021-03-10 22:04:06,532 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:06,559 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:04:06,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:06,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 22:04:06,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:06,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:06,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:06,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:04:06,679 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:06,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:06,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:04:06,682 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:06,699 INFO L628 ElimStorePlain]: treesize reduction 25, result has 41.9 percent of original size [2021-03-10 22:04:06,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:04:06,702 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:06,706 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:04:06,707 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:04:06,707 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:71, output treesize:6 [2021-03-10 22:04:06,712 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:06,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:06,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-10 22:04:06,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910715124] [2021-03-10 22:04:06,713 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 22:04:06,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:06,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 22:04:06,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:04:06,713 INFO L87 Difference]: Start difference. First operand 63 states and 128 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:06,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:06,740 INFO L93 Difference]: Finished difference Result 71 states and 144 transitions. [2021-03-10 22:04:06,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 22:04:06,741 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 22:04:06,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:06,741 INFO L225 Difference]: With dead ends: 71 [2021-03-10 22:04:06,741 INFO L226 Difference]: Without dead ends: 71 [2021-03-10 22:04:06,741 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 66.4ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:04:06,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-03-10 22:04:06,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 63. [2021-03-10 22:04:06,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.064516129032258) internal successors, (128), 62 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:06,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 128 transitions. [2021-03-10 22:04:06,747 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 128 transitions. Word has length 15 [2021-03-10 22:04:06,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:06,747 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 128 transitions. [2021-03-10 22:04:06,748 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:06,748 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 128 transitions. [2021-03-10 22:04:06,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 22:04:06,748 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:06,748 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:06,962 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable540,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:06,963 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:06,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:06,963 INFO L82 PathProgramCache]: Analyzing trace with hash -1453523481, now seen corresponding path program 23 times [2021-03-10 22:04:06,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:06,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266585811] [2021-03-10 22:04:06,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:06,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:07,013 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:07,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266585811] [2021-03-10 22:04:07,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232862556] [2021-03-10 22:04:07,014 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:07,044 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:04:07,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:07,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 22:04:07,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:07,107 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:07,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:07,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-10 22:04:07,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915275901] [2021-03-10 22:04:07,108 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 22:04:07,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:07,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 22:04:07,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:04:07,108 INFO L87 Difference]: Start difference. First operand 63 states and 128 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:07,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:07,169 INFO L93 Difference]: Finished difference Result 80 states and 163 transitions. [2021-03-10 22:04:07,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 22:04:07,169 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 22:04:07,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:07,169 INFO L225 Difference]: With dead ends: 80 [2021-03-10 22:04:07,170 INFO L226 Difference]: Without dead ends: 80 [2021-03-10 22:04:07,170 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 91.9ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:04:07,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-03-10 22:04:07,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 63. [2021-03-10 22:04:07,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.064516129032258) internal successors, (128), 62 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:07,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 128 transitions. [2021-03-10 22:04:07,175 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 128 transitions. Word has length 15 [2021-03-10 22:04:07,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:07,175 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 128 transitions. [2021-03-10 22:04:07,175 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:07,175 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 128 transitions. [2021-03-10 22:04:07,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 22:04:07,175 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:07,176 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:07,379 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable566 [2021-03-10 22:04:07,379 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:07,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:07,379 INFO L82 PathProgramCache]: Analyzing trace with hash 695385704, now seen corresponding path program 24 times [2021-03-10 22:04:07,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:07,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236442130] [2021-03-10 22:04:07,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:07,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:07,425 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:07,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236442130] [2021-03-10 22:04:07,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344084607] [2021-03-10 22:04:07,425 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:07,465 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:04:07,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:07,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 22:04:07,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:07,646 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:07,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:07,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-10 22:04:07,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487999850] [2021-03-10 22:04:07,647 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 22:04:07,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:07,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 22:04:07,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:04:07,647 INFO L87 Difference]: Start difference. First operand 63 states and 128 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:07,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:07,683 INFO L93 Difference]: Finished difference Result 69 states and 140 transitions. [2021-03-10 22:04:07,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 22:04:07,683 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 22:04:07,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:07,683 INFO L225 Difference]: With dead ends: 69 [2021-03-10 22:04:07,684 INFO L226 Difference]: Without dead ends: 69 [2021-03-10 22:04:07,684 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 72.1ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:04:07,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-03-10 22:04:07,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 61. [2021-03-10 22:04:07,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.066666666666667) internal successors, (124), 60 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:07,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 124 transitions. [2021-03-10 22:04:07,686 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 124 transitions. Word has length 15 [2021-03-10 22:04:07,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:07,686 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 124 transitions. [2021-03-10 22:04:07,686 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:07,686 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 124 transitions. [2021-03-10 22:04:07,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 22:04:07,686 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:07,686 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:07,895 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable575,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:07,895 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:07,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:07,895 INFO L82 PathProgramCache]: Analyzing trace with hash -865778159, now seen corresponding path program 25 times [2021-03-10 22:04:07,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:07,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164290079] [2021-03-10 22:04:07,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:07,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:07,944 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:07,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164290079] [2021-03-10 22:04:07,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811534897] [2021-03-10 22:04:07,945 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:07,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:07,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 22:04:07,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:08,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:04:08,131 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:08,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:08,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:04:08,135 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:08,227 INFO L628 ElimStorePlain]: treesize reduction 106, result has 43.3 percent of original size [2021-03-10 22:04:08,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:04:08,231 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:08,260 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:04:08,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:04:08,272 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:08,300 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:04:08,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:04:08,304 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:08,331 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:04:08,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:04:08,334 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:08,360 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:04:08,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:04:08,365 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:08,390 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:04:08,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:04:08,394 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:08,418 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:04:08,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:04:08,421 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:08,451 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:04:08,452 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:04:08,452 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:199, output treesize:13 [2021-03-10 22:04:08,479 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:08,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:08,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-10 22:04:08,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058694791] [2021-03-10 22:04:08,480 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 22:04:08,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:08,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 22:04:08,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:04:08,480 INFO L87 Difference]: Start difference. First operand 61 states and 124 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:08,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:08,512 INFO L93 Difference]: Finished difference Result 83 states and 156 transitions. [2021-03-10 22:04:08,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 22:04:08,512 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 22:04:08,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:08,512 INFO L225 Difference]: With dead ends: 83 [2021-03-10 22:04:08,512 INFO L226 Difference]: Without dead ends: 83 [2021-03-10 22:04:08,513 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 101.3ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:04:08,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-03-10 22:04:08,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 59. [2021-03-10 22:04:08,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 2.0) internal successors, (116), 58 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:08,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 116 transitions. [2021-03-10 22:04:08,514 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 116 transitions. Word has length 15 [2021-03-10 22:04:08,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:08,514 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 116 transitions. [2021-03-10 22:04:08,514 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:08,514 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 116 transitions. [2021-03-10 22:04:08,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 22:04:08,514 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:08,514 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:08,719 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable631 [2021-03-10 22:04:08,719 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:08,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:08,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1283131026, now seen corresponding path program 26 times [2021-03-10 22:04:08,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:08,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674515271] [2021-03-10 22:04:08,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:08,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:08,765 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:08,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674515271] [2021-03-10 22:04:08,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459524264] [2021-03-10 22:04:08,765 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:08,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:04:08,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:08,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 22:04:08,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:08,996 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:08,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:08,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-10 22:04:08,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663391775] [2021-03-10 22:04:08,997 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 22:04:08,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:08,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 22:04:08,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:04:08,998 INFO L87 Difference]: Start difference. First operand 59 states and 116 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:09,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:09,086 INFO L93 Difference]: Finished difference Result 99 states and 185 transitions. [2021-03-10 22:04:09,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:04:09,086 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 22:04:09,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:09,087 INFO L225 Difference]: With dead ends: 99 [2021-03-10 22:04:09,087 INFO L226 Difference]: Without dead ends: 99 [2021-03-10 22:04:09,088 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 115.9ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:04:09,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-03-10 22:04:09,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 60. [2021-03-10 22:04:09,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.0508474576271185) internal successors, (121), 59 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:09,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 121 transitions. [2021-03-10 22:04:09,090 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 121 transitions. Word has length 15 [2021-03-10 22:04:09,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:09,090 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 121 transitions. [2021-03-10 22:04:09,090 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:09,090 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 121 transitions. [2021-03-10 22:04:09,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 22:04:09,090 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:09,090 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:09,303 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable652 [2021-03-10 22:04:09,303 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:09,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:09,303 INFO L82 PathProgramCache]: Analyzing trace with hash 747901224, now seen corresponding path program 27 times [2021-03-10 22:04:09,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:09,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061068133] [2021-03-10 22:04:09,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:09,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:09,350 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:09,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061068133] [2021-03-10 22:04:09,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339348069] [2021-03-10 22:04:09,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:09,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:04:09,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:09,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 22:04:09,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:09,518 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:09,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:09,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-10 22:04:09,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648340243] [2021-03-10 22:04:09,518 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 22:04:09,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:09,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 22:04:09,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:04:09,519 INFO L87 Difference]: Start difference. First operand 60 states and 121 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:09,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:09,585 INFO L93 Difference]: Finished difference Result 69 states and 135 transitions. [2021-03-10 22:04:09,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 22:04:09,585 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 22:04:09,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:09,586 INFO L225 Difference]: With dead ends: 69 [2021-03-10 22:04:09,586 INFO L226 Difference]: Without dead ends: 69 [2021-03-10 22:04:09,587 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 80.1ms TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:04:09,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-03-10 22:04:09,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 58. [2021-03-10 22:04:09,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.0) internal successors, (114), 57 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:09,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 114 transitions. [2021-03-10 22:04:09,589 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 114 transitions. Word has length 15 [2021-03-10 22:04:09,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:09,589 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 114 transitions. [2021-03-10 22:04:09,589 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:09,589 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 114 transitions. [2021-03-10 22:04:09,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 22:04:09,589 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:09,589 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:09,795 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable713 [2021-03-10 22:04:09,795 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:09,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:09,795 INFO L82 PathProgramCache]: Analyzing trace with hash 383180689, now seen corresponding path program 28 times [2021-03-10 22:04:09,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:09,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192397750] [2021-03-10 22:04:09,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:09,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:09,835 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:09,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192397750] [2021-03-10 22:04:09,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199594750] [2021-03-10 22:04:09,835 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:09,874 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:04:09,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:09,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 22:04:09,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:10,039 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:10,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:10,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-10 22:04:10,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981444895] [2021-03-10 22:04:10,040 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 22:04:10,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:10,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 22:04:10,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:04:10,041 INFO L87 Difference]: Start difference. First operand 58 states and 114 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:10,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:10,168 INFO L93 Difference]: Finished difference Result 62 states and 118 transitions. [2021-03-10 22:04:10,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 22:04:10,168 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 22:04:10,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:10,169 INFO L225 Difference]: With dead ends: 62 [2021-03-10 22:04:10,169 INFO L226 Difference]: Without dead ends: 58 [2021-03-10 22:04:10,169 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 176.9ms TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:04:10,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-03-10 22:04:10,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2021-03-10 22:04:10,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.981818181818182) internal successors, (109), 55 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:10,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 109 transitions. [2021-03-10 22:04:10,170 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 109 transitions. Word has length 15 [2021-03-10 22:04:10,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:10,170 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 109 transitions. [2021-03-10 22:04:10,170 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:10,170 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 109 transitions. [2021-03-10 22:04:10,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 22:04:10,171 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:10,171 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:10,378 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable743,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:10,378 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:10,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:10,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1967161889, now seen corresponding path program 29 times [2021-03-10 22:04:10,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:10,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013463226] [2021-03-10 22:04:10,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:10,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:10,425 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:10,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013463226] [2021-03-10 22:04:10,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102419596] [2021-03-10 22:04:10,425 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:10,457 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:04:10,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:10,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 22:04:10,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:10,554 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:10,554 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:10,554 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-03-10 22:04:10,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149882353] [2021-03-10 22:04:10,555 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 22:04:10,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:10,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 22:04:10,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:04:10,555 INFO L87 Difference]: Start difference. First operand 56 states and 109 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:10,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:10,645 INFO L93 Difference]: Finished difference Result 75 states and 138 transitions. [2021-03-10 22:04:10,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 22:04:10,647 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 22:04:10,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:10,647 INFO L225 Difference]: With dead ends: 75 [2021-03-10 22:04:10,647 INFO L226 Difference]: Without dead ends: 75 [2021-03-10 22:04:10,648 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 133.4ms TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:04:10,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-03-10 22:04:10,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 56. [2021-03-10 22:04:10,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.981818181818182) internal successors, (109), 55 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:10,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 109 transitions. [2021-03-10 22:04:10,649 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 109 transitions. Word has length 15 [2021-03-10 22:04:10,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:10,649 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 109 transitions. [2021-03-10 22:04:10,649 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:10,649 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 109 transitions. [2021-03-10 22:04:10,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 22:04:10,649 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:10,649 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:10,863 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable764 [2021-03-10 22:04:10,863 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:10,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:10,863 INFO L82 PathProgramCache]: Analyzing trace with hash 1880467684, now seen corresponding path program 30 times [2021-03-10 22:04:10,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:10,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228588964] [2021-03-10 22:04:10,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:10,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:10,904 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:10,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228588964] [2021-03-10 22:04:10,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376929664] [2021-03-10 22:04:10,904 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:10,935 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:04:10,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:10,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 22:04:10,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:10,980 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:10,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:10,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-03-10 22:04:10,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812857910] [2021-03-10 22:04:10,981 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 22:04:10,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:10,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 22:04:10,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-03-10 22:04:10,982 INFO L87 Difference]: Start difference. First operand 56 states and 109 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:11,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:11,102 INFO L93 Difference]: Finished difference Result 93 states and 172 transitions. [2021-03-10 22:04:11,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:04:11,102 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 22:04:11,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:11,103 INFO L225 Difference]: With dead ends: 93 [2021-03-10 22:04:11,103 INFO L226 Difference]: Without dead ends: 93 [2021-03-10 22:04:11,103 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 109.3ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:04:11,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-03-10 22:04:11,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 57. [2021-03-10 22:04:11,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.0357142857142856) internal successors, (114), 56 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:11,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 114 transitions. [2021-03-10 22:04:11,106 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 114 transitions. Word has length 15 [2021-03-10 22:04:11,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:11,106 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 114 transitions. [2021-03-10 22:04:11,106 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:11,106 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 114 transitions. [2021-03-10 22:04:11,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 22:04:11,106 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:11,107 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:11,321 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable771,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:11,321 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:11,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:11,322 INFO L82 PathProgramCache]: Analyzing trace with hash 1345237882, now seen corresponding path program 31 times [2021-03-10 22:04:11,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:11,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231584525] [2021-03-10 22:04:11,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:11,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:11,359 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:11,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231584525] [2021-03-10 22:04:11,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474912461] [2021-03-10 22:04:11,359 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 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 [2021-03-10 22:04:11,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:11,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 22:04:11,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:11,426 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:11,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:11,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-03-10 22:04:11,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456107876] [2021-03-10 22:04:11,427 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 22:04:11,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:11,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 22:04:11,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-03-10 22:04:11,430 INFO L87 Difference]: Start difference. First operand 57 states and 114 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:11,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:11,477 INFO L93 Difference]: Finished difference Result 70 states and 138 transitions. [2021-03-10 22:04:11,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:04:11,477 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 22:04:11,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:11,478 INFO L225 Difference]: With dead ends: 70 [2021-03-10 22:04:11,478 INFO L226 Difference]: Without dead ends: 70 [2021-03-10 22:04:11,478 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 54.4ms TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:04:11,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-03-10 22:04:11,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 57. [2021-03-10 22:04:11,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.0357142857142856) internal successors, (114), 56 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:11,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 114 transitions. [2021-03-10 22:04:11,479 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 114 transitions. Word has length 15 [2021-03-10 22:04:11,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:11,479 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 114 transitions. [2021-03-10 22:04:11,479 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:11,479 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 114 transitions. [2021-03-10 22:04:11,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 22:04:11,480 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:11,480 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:11,694 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable777 [2021-03-10 22:04:11,694 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:11,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:11,694 INFO L82 PathProgramCache]: Analyzing trace with hash 980517347, now seen corresponding path program 32 times [2021-03-10 22:04:11,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:11,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352973174] [2021-03-10 22:04:11,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:11,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:11,731 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:11,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352973174] [2021-03-10 22:04:11,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189109550] [2021-03-10 22:04:11,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:11,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:04:11,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:11,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 22:04:11,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:11,848 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:11,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:11,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-03-10 22:04:11,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168645397] [2021-03-10 22:04:11,848 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 22:04:11,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:11,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 22:04:11,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:04:11,849 INFO L87 Difference]: Start difference. First operand 57 states and 114 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:11,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:11,927 INFO L93 Difference]: Finished difference Result 76 states and 139 transitions. [2021-03-10 22:04:11,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 22:04:11,927 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 22:04:11,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:11,927 INFO L225 Difference]: With dead ends: 76 [2021-03-10 22:04:11,927 INFO L226 Difference]: Without dead ends: 72 [2021-03-10 22:04:11,927 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 128.6ms TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:04:11,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-03-10 22:04:11,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 56. [2021-03-10 22:04:11,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.018181818181818) internal successors, (111), 55 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:11,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 111 transitions. [2021-03-10 22:04:11,929 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 111 transitions. Word has length 15 [2021-03-10 22:04:11,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:11,929 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 111 transitions. [2021-03-10 22:04:11,929 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:11,929 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 111 transitions. [2021-03-10 22:04:11,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 22:04:11,929 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:11,929 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:12,143 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable779 [2021-03-10 22:04:12,143 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:12,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:12,144 INFO L82 PathProgramCache]: Analyzing trace with hash -1267892504, now seen corresponding path program 33 times [2021-03-10 22:04:12,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:12,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243040836] [2021-03-10 22:04:12,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:12,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:12,179 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:12,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243040836] [2021-03-10 22:04:12,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353033722] [2021-03-10 22:04:12,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:12,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:04:12,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:12,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 22:04:12,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:12,235 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:12,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:12,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-03-10 22:04:12,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737999638] [2021-03-10 22:04:12,235 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 22:04:12,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:12,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 22:04:12,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-03-10 22:04:12,236 INFO L87 Difference]: Start difference. First operand 56 states and 111 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:12,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:12,292 INFO L93 Difference]: Finished difference Result 81 states and 149 transitions. [2021-03-10 22:04:12,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:04:12,293 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 22:04:12,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:12,293 INFO L225 Difference]: With dead ends: 81 [2021-03-10 22:04:12,293 INFO L226 Difference]: Without dead ends: 81 [2021-03-10 22:04:12,293 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 44.7ms TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:04:12,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-03-10 22:04:12,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 52. [2021-03-10 22:04:12,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.9803921568627452) internal successors, (101), 51 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:12,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 101 transitions. [2021-03-10 22:04:12,294 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 101 transitions. Word has length 15 [2021-03-10 22:04:12,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:12,294 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 101 transitions. [2021-03-10 22:04:12,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:12,294 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 101 transitions. [2021-03-10 22:04:12,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 22:04:12,295 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:12,295 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:12,507 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable784 [2021-03-10 22:04:12,507 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:12,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:12,507 INFO L82 PathProgramCache]: Analyzing trace with hash 1061916403, now seen corresponding path program 34 times [2021-03-10 22:04:12,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:12,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610286711] [2021-03-10 22:04:12,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:12,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:12,537 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:12,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610286711] [2021-03-10 22:04:12,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951120121] [2021-03-10 22:04:12,538 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 22:04:12,565 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:04:12,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:12,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 22:04:12,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:12,636 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:12,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:12,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-03-10 22:04:12,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263416020] [2021-03-10 22:04:12,637 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 22:04:12,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:12,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 22:04:12,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-03-10 22:04:12,637 INFO L87 Difference]: Start difference. First operand 52 states and 101 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:12,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:12,718 INFO L93 Difference]: Finished difference Result 58 states and 108 transitions. [2021-03-10 22:04:12,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 22:04:12,719 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 22:04:12,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:12,719 INFO L225 Difference]: With dead ends: 58 [2021-03-10 22:04:12,719 INFO L226 Difference]: Without dead ends: 52 [2021-03-10 22:04:12,719 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 113.7ms TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:04:12,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-03-10 22:04:12,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-03-10 22:04:12,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.9607843137254901) internal successors, (100), 51 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:12,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 100 transitions. [2021-03-10 22:04:12,720 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 100 transitions. Word has length 15 [2021-03-10 22:04:12,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:12,720 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 100 transitions. [2021-03-10 22:04:12,720 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:12,720 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 100 transitions. [2021-03-10 22:04:12,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 22:04:12,721 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:12,721 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:12,934 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable787 [2021-03-10 22:04:12,935 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:12,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:12,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1145172877, now seen corresponding path program 35 times [2021-03-10 22:04:12,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:12,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260900237] [2021-03-10 22:04:12,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:12,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:13,089 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:13,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260900237] [2021-03-10 22:04:13,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533170538] [2021-03-10 22:04:13,090 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:13,123 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:04:13,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:13,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:04:13,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:13,558 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:13,559 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:13,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:13,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:13,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-03-10 22:04:13,565 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:13,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:13,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:13,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:04:13,569 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:13,572 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:13,572 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:13,629 INFO L628 ElimStorePlain]: treesize reduction 121, result has 33.5 percent of original size [2021-03-10 22:04:13,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:04:13,636 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:13,658 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:04:13,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:04:13,661 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:13,679 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:04:13,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:04:13,682 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:13,699 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:04:13,700 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:04:13,700 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 4 variables, input treesize:284, output treesize:46 [2021-03-10 22:04:13,766 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:13,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:13,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-03-10 22:04:13,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174739482] [2021-03-10 22:04:13,767 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:04:13,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:13,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:04:13,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:04:13,768 INFO L87 Difference]: Start difference. First operand 52 states and 100 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:13,953 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 48 [2021-03-10 22:04:14,109 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 65 [2021-03-10 22:04:14,305 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 64 [2021-03-10 22:04:14,776 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2021-03-10 22:04:15,009 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2021-03-10 22:04:15,195 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 65 [2021-03-10 22:04:15,579 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 64 [2021-03-10 22:04:15,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:15,606 INFO L93 Difference]: Finished difference Result 134 states and 265 transitions. [2021-03-10 22:04:15,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 22:04:15,606 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 22:04:15,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:15,607 INFO L225 Difference]: With dead ends: 134 [2021-03-10 22:04:15,607 INFO L226 Difference]: Without dead ends: 106 [2021-03-10 22:04:15,607 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 1998.9ms TimeCoverageRelationStatistics Valid=191, Invalid=865, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 22:04:15,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-03-10 22:04:15,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 57. [2021-03-10 22:04:15,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.017857142857143) internal successors, (113), 56 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:15,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 113 transitions. [2021-03-10 22:04:15,609 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 113 transitions. Word has length 16 [2021-03-10 22:04:15,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:15,609 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 113 transitions. [2021-03-10 22:04:15,609 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:15,609 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 113 transitions. [2021-03-10 22:04:15,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 22:04:15,609 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:15,609 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:15,822 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable793 [2021-03-10 22:04:15,822 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:15,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:15,823 INFO L82 PathProgramCache]: Analyzing trace with hash -914516767, now seen corresponding path program 36 times [2021-03-10 22:04:15,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:15,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132354223] [2021-03-10 22:04:15,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:15,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:15,955 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:15,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132354223] [2021-03-10 22:04:15,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643192669] [2021-03-10 22:04:15,955 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:15,990 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:04:15,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:15,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:04:15,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:16,483 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:16,484 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:16,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:16,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:16,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:04:16,488 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:16,491 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:16,491 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:16,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:16,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-03-10 22:04:16,495 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:16,551 INFO L628 ElimStorePlain]: treesize reduction 105, result has 37.5 percent of original size [2021-03-10 22:04:16,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:04:16,554 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:16,573 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:04:16,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:04:16,576 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:16,594 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:04:16,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:04:16,597 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:16,613 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:04:16,614 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:04:16,614 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 4 variables, input treesize:284, output treesize:46 [2021-03-10 22:04:16,680 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:16,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:16,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-03-10 22:04:16,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968243784] [2021-03-10 22:04:16,681 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:04:16,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:16,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:04:16,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:04:16,681 INFO L87 Difference]: Start difference. First operand 57 states and 113 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:16,946 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2021-03-10 22:04:17,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:17,049 INFO L93 Difference]: Finished difference Result 86 states and 167 transitions. [2021-03-10 22:04:17,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:04:17,050 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 22:04:17,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:17,050 INFO L225 Difference]: With dead ends: 86 [2021-03-10 22:04:17,050 INFO L226 Difference]: Without dead ends: 70 [2021-03-10 22:04:17,050 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 531.0ms TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:04:17,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-03-10 22:04:17,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 59. [2021-03-10 22:04:17,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 2.0172413793103448) internal successors, (117), 58 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:17,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 117 transitions. [2021-03-10 22:04:17,052 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 117 transitions. Word has length 16 [2021-03-10 22:04:17,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:17,052 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 117 transitions. [2021-03-10 22:04:17,052 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:17,052 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 117 transitions. [2021-03-10 22:04:17,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 22:04:17,052 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:17,052 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:17,271 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable864 [2021-03-10 22:04:17,271 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:17,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:17,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1407527461, now seen corresponding path program 37 times [2021-03-10 22:04:17,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:17,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109823153] [2021-03-10 22:04:17,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:17,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:17,406 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:17,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109823153] [2021-03-10 22:04:17,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013630583] [2021-03-10 22:04:17,407 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 22:04:17,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:17,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:04:17,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:17,923 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:17,923 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:17,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:17,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:17,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:04:17,928 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:17,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:17,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:17,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-03-10 22:04:17,932 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:17,935 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:17,936 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:17,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:17,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:17,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:04:17,940 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:17,943 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:17,944 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:18,004 INFO L628 ElimStorePlain]: treesize reduction 179, result has 24.8 percent of original size [2021-03-10 22:04:18,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:04:18,007 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:18,026 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:04:18,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:04:18,030 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:18,048 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:04:18,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:04:18,050 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:18,067 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:04:18,068 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:04:18,068 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 4 variables, input treesize:432, output treesize:46 [2021-03-10 22:04:18,135 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:18,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:18,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-03-10 22:04:18,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482670024] [2021-03-10 22:04:18,135 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:04:18,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:18,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:04:18,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:04:18,136 INFO L87 Difference]: Start difference. First operand 59 states and 117 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:18,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:18,504 INFO L93 Difference]: Finished difference Result 83 states and 161 transitions. [2021-03-10 22:04:18,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:04:18,505 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 22:04:18,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:18,505 INFO L225 Difference]: With dead ends: 83 [2021-03-10 22:04:18,505 INFO L226 Difference]: Without dead ends: 70 [2021-03-10 22:04:18,505 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 478.2ms TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:04:18,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-03-10 22:04:18,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 60. [2021-03-10 22:04:18,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.016949152542373) internal successors, (119), 59 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:18,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 119 transitions. [2021-03-10 22:04:18,506 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 119 transitions. Word has length 16 [2021-03-10 22:04:18,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:18,507 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 119 transitions. [2021-03-10 22:04:18,507 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:18,507 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 119 transitions. [2021-03-10 22:04:18,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 22:04:18,507 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:18,507 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:18,707 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable986 [2021-03-10 22:04:18,707 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:18,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:18,708 INFO L82 PathProgramCache]: Analyzing trace with hash 928242785, now seen corresponding path program 38 times [2021-03-10 22:04:18,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:18,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683887618] [2021-03-10 22:04:18,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:18,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:18,910 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:18,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683887618] [2021-03-10 22:04:18,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93929283] [2021-03-10 22:04:18,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:18,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:04:18,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:18,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:04:18,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:19,506 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:19,507 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:19,511 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:19,512 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:19,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:19,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:19,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-03-10 22:04:19,518 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:19,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:19,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:04:19,524 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:19,661 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 63 [2021-03-10 22:04:19,662 INFO L628 ElimStorePlain]: treesize reduction 359, result has 24.4 percent of original size [2021-03-10 22:04:19,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:04:19,666 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:19,708 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:04:19,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:04:19,713 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:19,754 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:04:19,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:04:19,758 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:19,798 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:04:19,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:04:19,801 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:19,840 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:04:19,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:04:19,844 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:19,881 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:04:19,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:04:19,884 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:19,919 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:04:19,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:04:19,923 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:19,957 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:04:19,958 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:04:19,958 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 10 variables, input treesize:609, output treesize:73 [2021-03-10 22:04:20,106 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:20,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:20,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-03-10 22:04:20,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460580982] [2021-03-10 22:04:20,107 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:04:20,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:20,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:04:20,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:04:20,107 INFO L87 Difference]: Start difference. First operand 60 states and 119 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:20,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:20,470 INFO L93 Difference]: Finished difference Result 101 states and 185 transitions. [2021-03-10 22:04:20,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:04:20,470 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 22:04:20,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:20,470 INFO L225 Difference]: With dead ends: 101 [2021-03-10 22:04:20,471 INFO L226 Difference]: Without dead ends: 82 [2021-03-10 22:04:20,471 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 606.5ms TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:04:20,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-03-10 22:04:20,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 62. [2021-03-10 22:04:20,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.0491803278688523) internal successors, (125), 61 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:20,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 125 transitions. [2021-03-10 22:04:20,472 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 125 transitions. Word has length 16 [2021-03-10 22:04:20,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:20,472 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 125 transitions. [2021-03-10 22:04:20,472 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:20,472 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 125 transitions. [2021-03-10 22:04:20,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 22:04:20,473 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:20,473 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:20,673 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1100 [2021-03-10 22:04:20,673 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:20,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:20,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1995272783, now seen corresponding path program 39 times [2021-03-10 22:04:20,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:20,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192052664] [2021-03-10 22:04:20,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:20,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:20,803 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:20,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192052664] [2021-03-10 22:04:20,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780657679] [2021-03-10 22:04:20,803 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 22:04:20,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:04:20,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:20,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:04:20,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:21,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:04:21,023 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:21,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:04:21,027 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:21,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:04:21,030 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:21,054 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:04:21,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:04:21,057 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:21,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:04:21,062 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:21,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:04:21,065 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:21,085 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:04:21,086 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:04:21,086 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:88, output treesize:52 [2021-03-10 22:04:21,167 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:21,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:21,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-03-10 22:04:21,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004636598] [2021-03-10 22:04:21,167 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:04:21,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:21,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:04:21,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:04:21,168 INFO L87 Difference]: Start difference. First operand 62 states and 125 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:21,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:21,358 INFO L93 Difference]: Finished difference Result 84 states and 161 transitions. [2021-03-10 22:04:21,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:04:21,358 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 22:04:21,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:21,358 INFO L225 Difference]: With dead ends: 84 [2021-03-10 22:04:21,358 INFO L226 Difference]: Without dead ends: 71 [2021-03-10 22:04:21,359 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 352.0ms TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:04:21,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-03-10 22:04:21,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 64. [2021-03-10 22:04:21,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.0476190476190474) internal successors, (129), 63 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:21,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 129 transitions. [2021-03-10 22:04:21,360 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 129 transitions. Word has length 16 [2021-03-10 22:04:21,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:21,360 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 129 transitions. [2021-03-10 22:04:21,360 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:21,360 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 129 transitions. [2021-03-10 22:04:21,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 22:04:21,360 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:21,360 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:21,575 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1257 [2021-03-10 22:04:21,575 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:21,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:21,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1515988107, now seen corresponding path program 40 times [2021-03-10 22:04:21,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:21,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804457389] [2021-03-10 22:04:21,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:21,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:21,725 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:21,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804457389] [2021-03-10 22:04:21,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425609585] [2021-03-10 22:04:21,725 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:21,771 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:04:21,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:21,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:04:21,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:21,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:04:21,929 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:21,932 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 5 treesize of output 1 [2021-03-10 22:04:21,933 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:21,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:04:21,937 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:21,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:04:21,940 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:21,994 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:04:21,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:04:21,997 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:22,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:04:22,001 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:22,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:04:22,005 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:22,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:04:22,008 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:22,047 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:04:22,048 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:04:22,048 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:135, output treesize:79 [2021-03-10 22:04:22,177 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:22,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:22,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-03-10 22:04:22,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803498740] [2021-03-10 22:04:22,177 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:04:22,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:22,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:04:22,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:04:22,178 INFO L87 Difference]: Start difference. First operand 64 states and 129 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:22,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:22,361 INFO L93 Difference]: Finished difference Result 79 states and 152 transitions. [2021-03-10 22:04:22,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:04:22,362 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 22:04:22,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:22,362 INFO L225 Difference]: With dead ends: 79 [2021-03-10 22:04:22,362 INFO L226 Difference]: Without dead ends: 67 [2021-03-10 22:04:22,362 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 345.5ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:04:22,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-03-10 22:04:22,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2021-03-10 22:04:22,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 2.046875) internal successors, (131), 64 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:22,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 131 transitions. [2021-03-10 22:04:22,364 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 131 transitions. Word has length 16 [2021-03-10 22:04:22,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:22,364 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 131 transitions. [2021-03-10 22:04:22,364 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:22,364 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 131 transitions. [2021-03-10 22:04:22,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 22:04:22,364 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:22,364 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:22,571 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1291,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:22,571 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:22,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:22,571 INFO L82 PathProgramCache]: Analyzing trace with hash 980758305, now seen corresponding path program 41 times [2021-03-10 22:04:22,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:22,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372025404] [2021-03-10 22:04:22,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:22,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:22,703 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:22,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372025404] [2021-03-10 22:04:22,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795194866] [2021-03-10 22:04:22,703 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:22,737 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:04:22,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:22,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:04:22,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:23,598 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:23,599 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:23,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:23,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:23,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:04:23,604 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:23,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:23,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:23,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:04:23,609 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:23,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:23,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:23,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-03-10 22:04:23,614 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:23,617 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:23,617 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:23,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:23,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:23,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:04:23,622 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:23,625 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:23,626 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:23,630 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:23,630 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:23,634 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:23,634 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:23,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:23,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:23,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:04:23,639 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:23,642 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:23,643 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:23,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:23,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:23,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:04:23,647 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:23,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:23,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:23,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:04:23,651 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:23,654 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:23,655 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:23,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:23,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:23,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:04:23,659 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:23,662 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:23,662 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:23,750 INFO L628 ElimStorePlain]: treesize reduction 16, result has 86.8 percent of original size [2021-03-10 22:04:23,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:04:23,754 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:23,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:04:23,757 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:23,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:04:23,760 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:23,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:04:23,763 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:23,799 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:04:23,800 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:04:23,801 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 3 variables, input treesize:609, output treesize:73 [2021-03-10 22:04:23,916 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:23,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:23,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-03-10 22:04:23,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062001532] [2021-03-10 22:04:23,916 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:04:23,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:23,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:04:23,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:04:23,917 INFO L87 Difference]: Start difference. First operand 65 states and 131 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:24,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:24,229 INFO L93 Difference]: Finished difference Result 102 states and 198 transitions. [2021-03-10 22:04:24,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:04:24,229 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 22:04:24,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:24,230 INFO L225 Difference]: With dead ends: 102 [2021-03-10 22:04:24,230 INFO L226 Difference]: Without dead ends: 83 [2021-03-10 22:04:24,230 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 439.2ms TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:04:24,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-03-10 22:04:24,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 67. [2021-03-10 22:04:24,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 2.0606060606060606) internal successors, (136), 66 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:24,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 136 transitions. [2021-03-10 22:04:24,231 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 136 transitions. Word has length 16 [2021-03-10 22:04:24,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:24,231 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 136 transitions. [2021-03-10 22:04:24,231 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:24,231 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 136 transitions. [2021-03-10 22:04:24,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 22:04:24,232 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:24,232 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:24,435 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1326 [2021-03-10 22:04:24,435 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:24,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:24,435 INFO L82 PathProgramCache]: Analyzing trace with hash -8562829, now seen corresponding path program 42 times [2021-03-10 22:04:24,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:24,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760796857] [2021-03-10 22:04:24,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:24,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:24,658 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:24,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760796857] [2021-03-10 22:04:24,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842372339] [2021-03-10 22:04:24,659 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 22:04:24,689 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:04:24,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:24,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:04:24,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:25,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:25,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:25,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:04:25,364 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:25,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:25,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:25,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:04:25,369 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:25,373 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:25,374 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:25,377 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:25,378 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:25,382 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:25,382 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:25,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:25,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:25,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:04:25,387 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:25,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:25,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:25,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-03-10 22:04:25,394 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:25,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:25,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:25,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:04:25,399 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:25,403 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:25,403 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:25,406 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:25,407 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:25,410 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:25,410 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:25,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:25,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-03-10 22:04:25,414 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:25,468 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-03-10 22:04:25,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:04:25,471 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:25,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:04:25,474 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:25,477 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 6 treesize of output 2 [2021-03-10 22:04:25,478 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:25,498 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:04:25,499 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:04:25,500 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:467, output treesize:52 [2021-03-10 22:04:25,570 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:25,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:25,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-03-10 22:04:25,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668321178] [2021-03-10 22:04:25,570 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:04:25,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:25,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:04:25,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:04:25,580 INFO L87 Difference]: Start difference. First operand 67 states and 136 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:25,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:25,914 INFO L93 Difference]: Finished difference Result 97 states and 192 transitions. [2021-03-10 22:04:25,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:04:25,914 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 22:04:25,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:25,914 INFO L225 Difference]: With dead ends: 97 [2021-03-10 22:04:25,914 INFO L226 Difference]: Without dead ends: 81 [2021-03-10 22:04:25,915 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 587.8ms TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:04:25,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-03-10 22:04:25,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 70. [2021-03-10 22:04:25,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 2.0579710144927534) internal successors, (142), 69 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:25,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 142 transitions. [2021-03-10 22:04:25,916 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 142 transitions. Word has length 16 [2021-03-10 22:04:25,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:25,916 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 142 transitions. [2021-03-10 22:04:25,916 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:25,916 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 142 transitions. [2021-03-10 22:04:25,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 22:04:25,916 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:25,916 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:26,131 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1748,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:26,131 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:26,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:26,131 INFO L82 PathProgramCache]: Analyzing trace with hash -1981485897, now seen corresponding path program 43 times [2021-03-10 22:04:26,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:26,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719341980] [2021-03-10 22:04:26,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:26,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:26,290 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:26,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719341980] [2021-03-10 22:04:26,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555999048] [2021-03-10 22:04:26,290 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:26,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:26,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:04:26,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:26,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:26,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:26,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:04:26,918 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:26,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:26,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:26,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-03-10 22:04:26,924 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:26,927 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:26,928 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:26,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:26,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:26,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-03-10 22:04:26,933 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:26,937 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:26,938 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:26,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:26,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:26,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:04:26,942 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:26,946 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:26,947 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:26,950 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:26,951 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:26,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:26,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:26,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:04:26,956 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:26,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:26,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:26,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:04:26,961 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:26,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:26,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:26,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-03-10 22:04:26,967 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:26,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:26,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:26,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:04:26,971 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:26,975 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:26,975 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:26,979 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:26,979 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:26,982 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:26,983 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:26,986 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:26,986 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:26,989 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:26,990 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:26,993 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:26,994 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:27,049 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-03-10 22:04:27,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:04:27,055 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:27,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:04:27,058 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:27,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:04:27,061 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:27,083 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:04:27,088 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:04:27,088 INFO L247 ElimStorePlain]: Needed 22 recursive calls to eliminate 4 variables, input treesize:703, output treesize:52 [2021-03-10 22:04:27,163 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:27,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:27,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-03-10 22:04:27,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157860140] [2021-03-10 22:04:27,163 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:04:27,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:27,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:04:27,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:04:27,164 INFO L87 Difference]: Start difference. First operand 70 states and 142 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:27,449 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 51 [2021-03-10 22:04:27,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:27,530 INFO L93 Difference]: Finished difference Result 94 states and 186 transitions. [2021-03-10 22:04:27,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:04:27,530 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 22:04:27,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:27,531 INFO L225 Difference]: With dead ends: 94 [2021-03-10 22:04:27,531 INFO L226 Difference]: Without dead ends: 81 [2021-03-10 22:04:27,531 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 584.5ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:04:27,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-03-10 22:04:27,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 71. [2021-03-10 22:04:27,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 2.057142857142857) internal successors, (144), 70 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:27,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 144 transitions. [2021-03-10 22:04:27,539 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 144 transitions. Word has length 16 [2021-03-10 22:04:27,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:27,539 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 144 transitions. [2021-03-10 22:04:27,539 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:27,539 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 144 transitions. [2021-03-10 22:04:27,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 22:04:27,539 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:27,539 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:27,743 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1853,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:27,743 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:27,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:27,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1834196723, now seen corresponding path program 44 times [2021-03-10 22:04:27,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:27,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699449199] [2021-03-10 22:04:27,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:27,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:27,893 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:27,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699449199] [2021-03-10 22:04:27,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503355564] [2021-03-10 22:04:27,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:27,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:04:27,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:27,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:04:27,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:28,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:28,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:28,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:04:28,473 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:28,478 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:28,478 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:28,483 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:28,483 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:28,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:28,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:28,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:04:28,489 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:28,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:28,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:28,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-03-10 22:04:28,496 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:28,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:28,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:28,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:04:28,502 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:28,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:28,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:28,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:04:28,509 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:28,513 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:28,514 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:28,518 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:28,518 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:28,524 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:28,525 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:28,529 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:28,530 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:28,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:28,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:28,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-03-10 22:04:28,535 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:28,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:28,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:28,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:04:28,541 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:28,545 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:28,545 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:28,549 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:28,550 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:28,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:28,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:28,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:04:28,555 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:28,559 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:28,560 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:28,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:28,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:28,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:04:28,566 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:28,569 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:28,569 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:28,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:28,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-03-10 22:04:28,574 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:28,701 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2021-03-10 22:04:28,701 INFO L628 ElimStorePlain]: treesize reduction 24, result has 86.4 percent of original size [2021-03-10 22:04:28,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:04:28,718 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:28,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:04:28,722 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:28,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:04:28,725 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:28,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:04:28,729 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:28,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:04:28,733 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:28,783 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:04:28,785 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 22:04:28,785 INFO L247 ElimStorePlain]: Needed 26 recursive calls to eliminate 5 variables, input treesize:897, output treesize:100 [2021-03-10 22:04:28,949 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:28,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:28,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-03-10 22:04:28,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436158374] [2021-03-10 22:04:28,949 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:04:28,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:28,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:04:28,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:04:28,950 INFO L87 Difference]: Start difference. First operand 71 states and 144 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:29,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:29,290 INFO L93 Difference]: Finished difference Result 93 states and 184 transitions. [2021-03-10 22:04:29,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:04:29,290 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 22:04:29,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:29,290 INFO L225 Difference]: With dead ends: 93 [2021-03-10 22:04:29,290 INFO L226 Difference]: Without dead ends: 81 [2021-03-10 22:04:29,290 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 522.2ms TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:04:29,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-03-10 22:04:29,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 70. [2021-03-10 22:04:29,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 2.0579710144927534) internal successors, (142), 69 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:29,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 142 transitions. [2021-03-10 22:04:29,292 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 142 transitions. Word has length 16 [2021-03-10 22:04:29,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:29,292 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 142 transitions. [2021-03-10 22:04:29,292 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:29,292 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 142 transitions. [2021-03-10 22:04:29,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 22:04:29,292 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:29,292 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:29,506 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1996 [2021-03-10 22:04:29,506 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:29,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:29,507 INFO L82 PathProgramCache]: Analyzing trace with hash -1393740575, now seen corresponding path program 45 times [2021-03-10 22:04:29,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:29,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833279969] [2021-03-10 22:04:29,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:29,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:29,665 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:29,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833279969] [2021-03-10 22:04:29,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192805025] [2021-03-10 22:04:29,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:29,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:04:29,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:29,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:04:29,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:29,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:04:29,882 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:29,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:04:29,885 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:29,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:04:29,889 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:29,913 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:04:29,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:04:29,916 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:29,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:04:29,919 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:29,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:04:29,922 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:29,942 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:04:29,943 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:04:29,943 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:92, output treesize:56 [2021-03-10 22:04:30,013 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:30,013 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:30,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-03-10 22:04:30,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430067480] [2021-03-10 22:04:30,014 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:04:30,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:30,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:04:30,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:04:30,014 INFO L87 Difference]: Start difference. First operand 70 states and 142 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:30,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:30,286 INFO L93 Difference]: Finished difference Result 95 states and 188 transitions. [2021-03-10 22:04:30,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:04:30,286 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 22:04:30,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:30,287 INFO L225 Difference]: With dead ends: 95 [2021-03-10 22:04:30,287 INFO L226 Difference]: Without dead ends: 82 [2021-03-10 22:04:30,287 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 446.2ms TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:04:30,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-03-10 22:04:30,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 72. [2021-03-10 22:04:30,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.056338028169014) internal successors, (146), 71 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:30,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 146 transitions. [2021-03-10 22:04:30,288 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 146 transitions. Word has length 16 [2021-03-10 22:04:30,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:30,288 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 146 transitions. [2021-03-10 22:04:30,288 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:30,289 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 146 transitions. [2021-03-10 22:04:30,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 22:04:30,289 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:30,289 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:30,489 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2135 [2021-03-10 22:04:30,489 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:30,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:30,490 INFO L82 PathProgramCache]: Analyzing trace with hash -1873025251, now seen corresponding path program 46 times [2021-03-10 22:04:30,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:30,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469933066] [2021-03-10 22:04:30,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:30,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:30,654 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:30,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469933066] [2021-03-10 22:04:30,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981698122] [2021-03-10 22:04:30,654 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:30,689 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:04:30,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:30,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:04:30,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:30,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:04:30,874 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:30,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:04:30,878 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:30,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:04:30,881 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:30,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:04:30,885 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:30,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:04:30,889 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:30,943 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:04:30,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:04:30,947 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:30,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:04:30,951 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:30,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:04:30,954 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:30,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:04:30,959 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:30,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:04:30,962 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:31,009 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:04:31,011 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 22:04:31,011 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 3 variables, input treesize:172, output treesize:104 [2021-03-10 22:04:31,167 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:31,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:31,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-03-10 22:04:31,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080233654] [2021-03-10 22:04:31,168 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:04:31,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:31,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:04:31,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:04:31,168 INFO L87 Difference]: Start difference. First operand 72 states and 146 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:31,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:31,351 INFO L93 Difference]: Finished difference Result 87 states and 169 transitions. [2021-03-10 22:04:31,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:04:31,352 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 22:04:31,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:31,352 INFO L225 Difference]: With dead ends: 87 [2021-03-10 22:04:31,352 INFO L226 Difference]: Without dead ends: 75 [2021-03-10 22:04:31,352 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 418.3ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:04:31,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-03-10 22:04:31,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 71. [2021-03-10 22:04:31,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 2.057142857142857) internal successors, (144), 70 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:31,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 144 transitions. [2021-03-10 22:04:31,354 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 144 transitions. Word has length 16 [2021-03-10 22:04:31,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:31,354 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 144 transitions. [2021-03-10 22:04:31,354 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:31,354 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 144 transitions. [2021-03-10 22:04:31,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 22:04:31,354 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:31,354 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:31,559 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2165,47 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:31,559 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:31,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:31,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1886712243, now seen corresponding path program 47 times [2021-03-10 22:04:31,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:31,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424666288] [2021-03-10 22:04:31,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:31,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:31,703 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:31,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424666288] [2021-03-10 22:04:31,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843718249] [2021-03-10 22:04:31,704 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:31,739 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:04:31,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:31,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:04:31,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:31,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:04:31,923 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:31,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:04:31,927 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:31,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:04:31,930 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:31,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:04:31,934 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:31,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:04:31,937 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:31,997 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:04:32,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:04:32,001 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:32,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:04:32,004 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:32,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:04:32,008 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:32,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:04:32,011 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:32,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:04:32,015 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:32,065 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:04:32,066 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 22:04:32,066 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 3 variables, input treesize:164, output treesize:96 [2021-03-10 22:04:32,233 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:32,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:32,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-03-10 22:04:32,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607286601] [2021-03-10 22:04:32,233 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:04:32,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:32,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:04:32,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:04:32,234 INFO L87 Difference]: Start difference. First operand 71 states and 144 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:32,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:32,556 INFO L93 Difference]: Finished difference Result 108 states and 211 transitions. [2021-03-10 22:04:32,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:04:32,556 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 22:04:32,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:32,557 INFO L225 Difference]: With dead ends: 108 [2021-03-10 22:04:32,557 INFO L226 Difference]: Without dead ends: 89 [2021-03-10 22:04:32,557 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 520.4ms TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:04:32,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-03-10 22:04:32,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 70. [2021-03-10 22:04:32,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 2.0579710144927534) internal successors, (142), 69 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:32,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 142 transitions. [2021-03-10 22:04:32,558 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 142 transitions. Word has length 16 [2021-03-10 22:04:32,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:32,558 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 142 transitions. [2021-03-10 22:04:32,558 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:32,558 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 142 transitions. [2021-03-10 22:04:32,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 22:04:32,559 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:32,559 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:32,771 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2192,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:32,771 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:32,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:32,771 INFO L82 PathProgramCache]: Analyzing trace with hash -353504777, now seen corresponding path program 48 times [2021-03-10 22:04:32,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:32,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317358789] [2021-03-10 22:04:32,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:32,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:32,998 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:32,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317358789] [2021-03-10 22:04:32,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465599544] [2021-03-10 22:04:32,998 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:33,030 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:04:33,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:33,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:04:33,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:33,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:04:33,209 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:33,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:04:33,213 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:33,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:04:33,216 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:33,240 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:04:33,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:04:33,243 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:33,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:04:33,246 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:33,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:04:33,249 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:33,270 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:04:33,270 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:04:33,270 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:84, output treesize:48 [2021-03-10 22:04:33,342 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:33,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:33,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-03-10 22:04:33,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951708350] [2021-03-10 22:04:33,343 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:04:33,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:33,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:04:33,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:04:33,343 INFO L87 Difference]: Start difference. First operand 70 states and 142 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:33,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:33,723 INFO L93 Difference]: Finished difference Result 100 states and 198 transitions. [2021-03-10 22:04:33,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:04:33,723 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 22:04:33,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:33,723 INFO L225 Difference]: With dead ends: 100 [2021-03-10 22:04:33,723 INFO L226 Difference]: Without dead ends: 87 [2021-03-10 22:04:33,724 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 629.7ms TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:04:33,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-03-10 22:04:33,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 73. [2021-03-10 22:04:33,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.0555555555555554) internal successors, (148), 72 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:33,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 148 transitions. [2021-03-10 22:04:33,725 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 148 transitions. Word has length 16 [2021-03-10 22:04:33,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:33,725 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 148 transitions. [2021-03-10 22:04:33,725 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:33,725 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 148 transitions. [2021-03-10 22:04:33,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 22:04:33,725 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:33,725 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:33,939 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2225 [2021-03-10 22:04:33,939 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:33,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:33,939 INFO L82 PathProgramCache]: Analyzing trace with hash -832789453, now seen corresponding path program 49 times [2021-03-10 22:04:33,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:33,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214488630] [2021-03-10 22:04:33,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:33,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:34,093 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:34,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214488630] [2021-03-10 22:04:34,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391450848] [2021-03-10 22:04:34,093 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:34,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:34,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 28 conjunts are in the unsatisfiable core [2021-03-10 22:04:34,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:34,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:04:34,282 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:34,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:04:34,286 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:34,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:04:34,290 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:34,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:04:34,294 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:34,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:04:34,299 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:34,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:04:34,303 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:34,306 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:34,307 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:34,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:04:34,311 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:34,313 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:34,314 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:34,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:04:34,318 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:34,464 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2021-03-10 22:04:34,465 INFO L628 ElimStorePlain]: treesize reduction 33, result has 85.7 percent of original size [2021-03-10 22:04:34,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:04:34,469 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:34,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:04:34,472 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:34,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:04:34,476 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:34,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:04:34,480 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:34,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:04:34,483 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:34,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:04:34,488 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:34,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:04:34,492 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:34,610 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 49 [2021-03-10 22:04:34,611 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.8 percent of original size [2021-03-10 22:04:34,612 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-03-10 22:04:34,612 INFO L247 ElimStorePlain]: Needed 18 recursive calls to eliminate 3 variables, input treesize:343, output treesize:140 [2021-03-10 22:04:34,770 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:34,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:34,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-03-10 22:04:34,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055062704] [2021-03-10 22:04:34,771 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:04:34,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:34,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:04:34,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:04:34,771 INFO L87 Difference]: Start difference. First operand 73 states and 148 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:35,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:35,089 INFO L93 Difference]: Finished difference Result 92 states and 184 transitions. [2021-03-10 22:04:35,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:04:35,090 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 22:04:35,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:35,090 INFO L225 Difference]: With dead ends: 92 [2021-03-10 22:04:35,090 INFO L226 Difference]: Without dead ends: 85 [2021-03-10 22:04:35,090 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 526.2ms TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:04:35,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-03-10 22:04:35,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 73. [2021-03-10 22:04:35,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.0555555555555554) internal successors, (148), 72 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:35,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 148 transitions. [2021-03-10 22:04:35,091 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 148 transitions. Word has length 16 [2021-03-10 22:04:35,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:35,091 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 148 transitions. [2021-03-10 22:04:35,091 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:35,091 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 148 transitions. [2021-03-10 22:04:35,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 22:04:35,092 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:35,092 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:35,303 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2249 [2021-03-10 22:04:35,303 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:35,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:35,303 INFO L82 PathProgramCache]: Analyzing trace with hash -1368019255, now seen corresponding path program 50 times [2021-03-10 22:04:35,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:35,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412227163] [2021-03-10 22:04:35,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:35,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:35,479 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:35,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412227163] [2021-03-10 22:04:35,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325745490] [2021-03-10 22:04:35,480 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:35,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:04:35,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:35,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:04:35,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:35,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:04:35,707 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:35,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:04:35,711 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:35,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:04:35,715 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:35,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:04:35,719 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:35,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:04:35,723 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:35,726 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:35,726 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:35,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:04:35,730 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:35,793 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:04:35,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:04:35,797 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:35,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:04:35,801 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:35,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:04:35,805 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:35,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:04:35,808 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:35,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:04:35,812 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:35,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:04:35,816 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:35,870 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:04:35,872 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-03-10 22:04:35,872 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 3 variables, input treesize:241, output treesize:125 [2021-03-10 22:04:36,029 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:36,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:36,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-03-10 22:04:36,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509205214] [2021-03-10 22:04:36,030 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:04:36,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:36,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:04:36,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:04:36,030 INFO L87 Difference]: Start difference. First operand 73 states and 148 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:36,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:36,332 INFO L93 Difference]: Finished difference Result 110 states and 215 transitions. [2021-03-10 22:04:36,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:04:36,333 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 22:04:36,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:36,333 INFO L225 Difference]: With dead ends: 110 [2021-03-10 22:04:36,333 INFO L226 Difference]: Without dead ends: 91 [2021-03-10 22:04:36,333 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 533.1ms TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:04:36,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-03-10 22:04:36,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 73. [2021-03-10 22:04:36,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.0555555555555554) internal successors, (148), 72 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:36,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 148 transitions. [2021-03-10 22:04:36,334 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 148 transitions. Word has length 16 [2021-03-10 22:04:36,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:36,334 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 148 transitions. [2021-03-10 22:04:36,334 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:36,335 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 148 transitions. [2021-03-10 22:04:36,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 22:04:36,335 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:36,335 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:36,535 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2293,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:36,535 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:36,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:36,536 INFO L82 PathProgramCache]: Analyzing trace with hash -780273933, now seen corresponding path program 51 times [2021-03-10 22:04:36,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:36,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815084064] [2021-03-10 22:04:36,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:36,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:36,682 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:36,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815084064] [2021-03-10 22:04:36,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137674054] [2021-03-10 22:04:36,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:36,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:04:36,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:36,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:04:36,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:37,536 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:37,537 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:37,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:37,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:37,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:04:37,543 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:37,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:37,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:37,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:04:37,549 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:37,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:37,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:37,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:04:37,556 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:37,561 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:37,561 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:37,566 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:37,567 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:37,571 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:37,572 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:37,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:37,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:37,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-03-10 22:04:37,578 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:37,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:37,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:37,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-03-10 22:04:37,584 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:37,589 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:37,589 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:37,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:37,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:37,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:04:37,595 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:37,598 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:37,599 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:37,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:37,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:37,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:04:37,604 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:37,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:37,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:37,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:04:37,610 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:37,614 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:37,614 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:37,618 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:37,618 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:37,724 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2021-03-10 22:04:37,724 INFO L628 ElimStorePlain]: treesize reduction 18, result has 88.5 percent of original size [2021-03-10 22:04:37,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:04:37,728 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:37,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:04:37,732 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:37,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:04:37,736 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:37,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:04:37,740 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:37,793 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:04:37,795 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:04:37,795 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 5 variables, input treesize:777, output treesize:89 [2021-03-10 22:04:37,933 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:37,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:37,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-03-10 22:04:37,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591097512] [2021-03-10 22:04:37,934 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:04:37,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:37,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:04:37,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:04:37,934 INFO L87 Difference]: Start difference. First operand 73 states and 148 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:38,213 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2021-03-10 22:04:38,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:38,285 INFO L93 Difference]: Finished difference Result 113 states and 221 transitions. [2021-03-10 22:04:38,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:04:38,285 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 22:04:38,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:38,286 INFO L225 Difference]: With dead ends: 113 [2021-03-10 22:04:38,286 INFO L226 Difference]: Without dead ends: 94 [2021-03-10 22:04:38,286 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 560.0ms TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:04:38,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-03-10 22:04:38,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 76. [2021-03-10 22:04:38,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.0533333333333332) internal successors, (154), 75 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:38,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 154 transitions. [2021-03-10 22:04:38,287 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 154 transitions. Word has length 16 [2021-03-10 22:04:38,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:38,287 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 154 transitions. [2021-03-10 22:04:38,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:38,287 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 154 transitions. [2021-03-10 22:04:38,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 22:04:38,287 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:38,287 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:38,499 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2327 [2021-03-10 22:04:38,499 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:38,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:38,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1613147809, now seen corresponding path program 52 times [2021-03-10 22:04:38,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:38,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699464084] [2021-03-10 22:04:38,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:38,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:38,660 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:38,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699464084] [2021-03-10 22:04:38,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28572490] [2021-03-10 22:04:38,661 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:38,693 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:04:38,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:38,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:04:38,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:39,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:39,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:39,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-03-10 22:04:39,315 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:39,319 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:39,320 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:39,323 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:39,324 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:39,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:39,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:39,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-03-10 22:04:39,330 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:39,334 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:39,335 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:39,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:39,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:39,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:04:39,340 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:39,344 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:39,345 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:39,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:39,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:39,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:04:39,350 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:39,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:39,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:39,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:04:39,356 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:39,359 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:39,360 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:39,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:39,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:39,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-03-10 22:04:39,365 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:39,369 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:39,369 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:39,372 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:39,373 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:39,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:39,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:39,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:04:39,378 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:39,381 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:39,382 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:39,438 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-03-10 22:04:39,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:04:39,442 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:39,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:04:39,445 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:39,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:04:39,448 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:39,470 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:04:39,471 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:04:39,471 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 4 variables, input treesize:591, output treesize:52 [2021-03-10 22:04:39,542 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:39,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:39,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-03-10 22:04:39,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104728697] [2021-03-10 22:04:39,543 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:04:39,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:39,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:04:39,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:04:39,547 INFO L87 Difference]: Start difference. First operand 76 states and 154 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:39,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:39,798 INFO L93 Difference]: Finished difference Result 96 states and 185 transitions. [2021-03-10 22:04:39,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:04:39,799 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 22:04:39,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:39,799 INFO L225 Difference]: With dead ends: 96 [2021-03-10 22:04:39,799 INFO L226 Difference]: Without dead ends: 80 [2021-03-10 22:04:39,799 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 530.0ms TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:04:39,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-03-10 22:04:39,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 77. [2021-03-10 22:04:39,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.0526315789473686) internal successors, (156), 76 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:39,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 156 transitions. [2021-03-10 22:04:39,800 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 156 transitions. Word has length 16 [2021-03-10 22:04:39,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:39,801 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 156 transitions. [2021-03-10 22:04:39,801 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:39,801 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 156 transitions. [2021-03-10 22:04:39,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 22:04:39,801 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:39,801 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:40,003 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2420 [2021-03-10 22:04:40,003 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:40,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:40,003 INFO L82 PathProgramCache]: Analyzing trace with hash -359775259, now seen corresponding path program 53 times [2021-03-10 22:04:40,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:40,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994231926] [2021-03-10 22:04:40,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:40,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:40,191 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:40,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994231926] [2021-03-10 22:04:40,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734061181] [2021-03-10 22:04:40,191 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:40,241 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:04:40,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:40,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:04:40,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:40,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:40,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:40,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:04:40,891 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:40,894 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:40,895 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:40,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:40,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:40,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:04:40,900 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:40,904 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:40,904 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:40,907 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:40,908 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:40,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:40,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:40,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-03-10 22:04:40,913 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:40,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:40,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:40,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-03-10 22:04:40,918 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:40,922 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:40,922 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:40,928 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:40,929 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:40,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:40,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:40,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:04:40,933 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:40,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:40,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:40,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:04:40,938 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:40,940 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:40,941 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:40,996 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-03-10 22:04:40,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:04:40,999 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:41,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:04:41,002 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:41,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:04:41,006 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:41,027 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:04:41,028 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:04:41,028 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:467, output treesize:52 [2021-03-10 22:04:41,100 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:41,100 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:41,100 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-03-10 22:04:41,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997241088] [2021-03-10 22:04:41,100 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:04:41,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:41,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:04:41,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:04:41,101 INFO L87 Difference]: Start difference. First operand 77 states and 156 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:41,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:41,433 INFO L93 Difference]: Finished difference Result 96 states and 185 transitions. [2021-03-10 22:04:41,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:04:41,434 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 22:04:41,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:41,434 INFO L225 Difference]: With dead ends: 96 [2021-03-10 22:04:41,434 INFO L226 Difference]: Without dead ends: 83 [2021-03-10 22:04:41,434 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 624.5ms TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:04:41,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-03-10 22:04:41,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 78. [2021-03-10 22:04:41,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.051948051948052) internal successors, (158), 77 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:41,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 158 transitions. [2021-03-10 22:04:41,435 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 158 transitions. Word has length 16 [2021-03-10 22:04:41,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:41,435 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 158 transitions. [2021-03-10 22:04:41,435 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:41,435 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 158 transitions. [2021-03-10 22:04:41,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 22:04:41,436 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:41,436 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:41,636 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2546 [2021-03-10 22:04:41,636 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:41,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:41,636 INFO L82 PathProgramCache]: Analyzing trace with hash -839059935, now seen corresponding path program 54 times [2021-03-10 22:04:41,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:41,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585324697] [2021-03-10 22:04:41,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:41,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:41,787 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:41,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585324697] [2021-03-10 22:04:41,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004558659] [2021-03-10 22:04:41,787 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 22:04:41,819 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:04:41,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:41,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:04:41,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:42,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:42,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:42,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-03-10 22:04:42,597 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:42,602 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:42,602 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:42,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:42,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:42,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-03-10 22:04:42,610 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:42,615 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:42,616 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:42,621 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:42,621 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:42,626 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:42,627 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:42,631 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:42,632 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:42,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:42,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:42,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:04:42,639 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:42,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:42,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:42,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:04:42,644 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:42,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:42,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:42,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:04:42,650 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:42,655 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:42,656 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:42,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:42,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:42,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:04:42,662 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:42,666 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:42,667 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:42,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:42,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:42,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:04:42,687 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:42,691 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:42,692 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:42,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:42,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:04:42,697 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:42,803 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 62 [2021-03-10 22:04:42,803 INFO L628 ElimStorePlain]: treesize reduction 18, result has 87.2 percent of original size [2021-03-10 22:04:42,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:04:42,807 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:42,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:04:42,811 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:42,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:04:42,815 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:42,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:04:42,818 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:42,858 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:04:42,859 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:04:42,859 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 5 variables, input treesize:709, output treesize:79 [2021-03-10 22:04:42,985 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:42,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:42,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-03-10 22:04:42,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443211700] [2021-03-10 22:04:42,986 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:04:42,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:42,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:04:42,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:04:42,986 INFO L87 Difference]: Start difference. First operand 78 states and 158 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:43,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:43,779 INFO L93 Difference]: Finished difference Result 165 states and 313 transitions. [2021-03-10 22:04:43,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:04:43,780 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 22:04:43,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:43,780 INFO L225 Difference]: With dead ends: 165 [2021-03-10 22:04:43,780 INFO L226 Difference]: Without dead ends: 132 [2021-03-10 22:04:43,780 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 913.3ms TimeCoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:04:43,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-03-10 22:04:43,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 81. [2021-03-10 22:04:43,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 2.1) internal successors, (168), 80 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:43,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 168 transitions. [2021-03-10 22:04:43,781 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 168 transitions. Word has length 16 [2021-03-10 22:04:43,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:43,782 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 168 transitions. [2021-03-10 22:04:43,782 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:43,782 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 168 transitions. [2021-03-10 22:04:43,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 22:04:43,782 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:43,782 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:43,982 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2674 [2021-03-10 22:04:43,982 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:43,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:43,982 INFO L82 PathProgramCache]: Analyzing trace with hash 227970063, now seen corresponding path program 55 times [2021-03-10 22:04:43,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:43,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805764672] [2021-03-10 22:04:43,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:43,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:44,137 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:44,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805764672] [2021-03-10 22:04:44,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95632448] [2021-03-10 22:04:44,138 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:44,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:44,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 28 conjunts are in the unsatisfiable core [2021-03-10 22:04:44,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:44,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:04:44,344 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:44,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:04:44,348 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:44,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:04:44,354 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:44,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:04:44,358 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:44,360 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:44,361 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:44,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:04:44,365 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:44,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:04:44,368 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:44,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:04:44,372 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:44,374 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:44,375 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:44,489 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 62 [2021-03-10 22:04:44,490 INFO L628 ElimStorePlain]: treesize reduction 1, result has 99.4 percent of original size [2021-03-10 22:04:44,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:04:44,493 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:44,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:04:44,497 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:44,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:04:44,500 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:44,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:04:44,504 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:44,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:04:44,507 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:44,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:04:44,511 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:44,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:04:44,515 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:44,603 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.4 percent of original size [2021-03-10 22:04:44,604 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-03-10 22:04:44,604 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 3 variables, input treesize:260, output treesize:105 [2021-03-10 22:04:44,706 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:44,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:44,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-03-10 22:04:44,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496468212] [2021-03-10 22:04:44,706 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:04:44,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:44,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:04:44,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:04:44,707 INFO L87 Difference]: Start difference. First operand 81 states and 168 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:45,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:45,148 INFO L93 Difference]: Finished difference Result 106 states and 216 transitions. [2021-03-10 22:04:45,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:04:45,148 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 22:04:45,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:45,149 INFO L225 Difference]: With dead ends: 106 [2021-03-10 22:04:45,149 INFO L226 Difference]: Without dead ends: 99 [2021-03-10 22:04:45,149 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 596.2ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:04:45,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-03-10 22:04:45,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 83. [2021-03-10 22:04:45,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.1097560975609757) internal successors, (173), 82 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:45,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 173 transitions. [2021-03-10 22:04:45,150 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 173 transitions. Word has length 16 [2021-03-10 22:04:45,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:45,150 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 173 transitions. [2021-03-10 22:04:45,150 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:45,150 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 173 transitions. [2021-03-10 22:04:45,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 22:04:45,150 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:45,150 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:45,361 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2798,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:45,361 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:45,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:45,361 INFO L82 PathProgramCache]: Analyzing trace with hash -251314613, now seen corresponding path program 56 times [2021-03-10 22:04:45,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:45,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758814302] [2021-03-10 22:04:45,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:45,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:45,494 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:45,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758814302] [2021-03-10 22:04:45,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40145841] [2021-03-10 22:04:45,494 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 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 [2021-03-10 22:04:45,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:04:45,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:45,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:04:45,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:45,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:04:45,716 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:45,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:04:45,720 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:45,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:04:45,724 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:45,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:04:45,728 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:45,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:04:45,733 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:45,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:04:45,737 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:45,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:04:45,741 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:45,878 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 64 [2021-03-10 22:04:45,878 INFO L628 ElimStorePlain]: treesize reduction 32, result has 84.5 percent of original size [2021-03-10 22:04:45,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:04:45,882 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:45,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:04:45,886 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:45,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:04:45,890 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:45,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:04:45,894 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:45,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:04:45,897 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:45,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:04:45,901 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:45,960 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:04:45,961 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-03-10 22:04:45,961 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 3 variables, input treesize:243, output treesize:125 [2021-03-10 22:04:46,122 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:46,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:46,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-03-10 22:04:46,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053984180] [2021-03-10 22:04:46,123 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:04:46,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:46,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:04:46,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:04:46,123 INFO L87 Difference]: Start difference. First operand 83 states and 173 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:46,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:46,409 INFO L93 Difference]: Finished difference Result 112 states and 225 transitions. [2021-03-10 22:04:46,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:04:46,409 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 22:04:46,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:46,409 INFO L225 Difference]: With dead ends: 112 [2021-03-10 22:04:46,410 INFO L226 Difference]: Without dead ends: 100 [2021-03-10 22:04:46,410 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 481.4ms TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:04:46,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-03-10 22:04:46,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 83. [2021-03-10 22:04:46,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.1097560975609757) internal successors, (173), 82 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:46,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 173 transitions. [2021-03-10 22:04:46,411 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 173 transitions. Word has length 16 [2021-03-10 22:04:46,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:46,411 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 173 transitions. [2021-03-10 22:04:46,411 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:46,411 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 173 transitions. [2021-03-10 22:04:46,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 22:04:46,411 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:46,411 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:46,615 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2823 [2021-03-10 22:04:46,615 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:46,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:46,615 INFO L82 PathProgramCache]: Analyzing trace with hash -786544415, now seen corresponding path program 57 times [2021-03-10 22:04:46,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:46,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384955800] [2021-03-10 22:04:46,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:46,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:46,780 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:46,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384955800] [2021-03-10 22:04:46,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526822670] [2021-03-10 22:04:46,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:46,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:04:46,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:46,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:04:46,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:47,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:04:47,008 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:47,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:04:47,011 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:47,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:04:47,015 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:47,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:04:47,019 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:47,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:04:47,022 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:47,080 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:04:47,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:04:47,084 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:47,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:04:47,087 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:47,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:04:47,091 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:47,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:04:47,094 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:47,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:04:47,098 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:47,147 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:04:47,149 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 22:04:47,149 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 3 variables, input treesize:164, output treesize:96 [2021-03-10 22:04:47,309 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:47,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:47,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-03-10 22:04:47,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175707746] [2021-03-10 22:04:47,309 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:04:47,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:47,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:04:47,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:04:47,310 INFO L87 Difference]: Start difference. First operand 83 states and 173 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:47,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:47,624 INFO L93 Difference]: Finished difference Result 121 states and 242 transitions. [2021-03-10 22:04:47,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:04:47,624 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 22:04:47,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:47,625 INFO L225 Difference]: With dead ends: 121 [2021-03-10 22:04:47,625 INFO L226 Difference]: Without dead ends: 102 [2021-03-10 22:04:47,625 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 539.0ms TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:04:47,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-03-10 22:04:47,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 83. [2021-03-10 22:04:47,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.1097560975609757) internal successors, (173), 82 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:47,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 173 transitions. [2021-03-10 22:04:47,626 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 173 transitions. Word has length 16 [2021-03-10 22:04:47,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:47,626 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 173 transitions. [2021-03-10 22:04:47,626 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:47,626 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 173 transitions. [2021-03-10 22:04:47,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 22:04:47,626 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:47,626 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:47,826 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2861,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:47,827 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:47,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:47,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1268205861, now seen corresponding path program 58 times [2021-03-10 22:04:47,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:47,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158464633] [2021-03-10 22:04:47,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:47,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:47,979 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:47,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158464633] [2021-03-10 22:04:47,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568689705] [2021-03-10 22:04:47,980 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:48,017 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:04:48,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:48,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:04:48,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:48,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:04:48,206 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:48,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:04:48,225 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:48,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:04:48,228 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:48,255 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:04:48,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:04:48,258 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:48,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:04:48,262 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:48,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:04:48,264 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:48,284 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:04:48,285 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:04:48,285 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:88, output treesize:52 [2021-03-10 22:04:48,358 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:48,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:48,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-03-10 22:04:48,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880943453] [2021-03-10 22:04:48,359 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:04:48,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:48,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:04:48,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:04:48,360 INFO L87 Difference]: Start difference. First operand 83 states and 173 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:48,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:48,624 INFO L93 Difference]: Finished difference Result 110 states and 223 transitions. [2021-03-10 22:04:48,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:04:48,625 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 22:04:48,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:48,625 INFO L225 Difference]: With dead ends: 110 [2021-03-10 22:04:48,625 INFO L226 Difference]: Without dead ends: 97 [2021-03-10 22:04:48,625 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 454.2ms TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:04:48,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-03-10 22:04:48,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 86. [2021-03-10 22:04:48,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.1058823529411765) internal successors, (179), 85 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:48,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 179 transitions. [2021-03-10 22:04:48,626 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 179 transitions. Word has length 16 [2021-03-10 22:04:48,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:48,627 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 179 transitions. [2021-03-10 22:04:48,627 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:48,627 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 179 transitions. [2021-03-10 22:04:48,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 22:04:48,627 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:48,627 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:48,835 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2901 [2021-03-10 22:04:48,835 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:48,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:48,835 INFO L82 PathProgramCache]: Analyzing trace with hash 788921185, now seen corresponding path program 59 times [2021-03-10 22:04:48,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:48,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361607434] [2021-03-10 22:04:48,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:48,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:49,021 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:49,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361607434] [2021-03-10 22:04:49,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252502296] [2021-03-10 22:04:49,021 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:49,067 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:04:49,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:49,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:04:49,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:49,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:04:49,217 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:49,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:04:49,221 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:49,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:04:49,226 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:49,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:04:49,229 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:49,275 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:04:49,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:04:49,279 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:49,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:04:49,282 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:49,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:04:49,286 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:49,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:04:49,289 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:49,327 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:04:49,329 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:04:49,329 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:139, output treesize:83 [2021-03-10 22:04:49,461 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:49,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:49,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-03-10 22:04:49,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441963935] [2021-03-10 22:04:49,462 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:04:49,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:49,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:04:49,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:04:49,463 INFO L87 Difference]: Start difference. First operand 86 states and 179 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:49,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:49,783 INFO L93 Difference]: Finished difference Result 128 states and 247 transitions. [2021-03-10 22:04:49,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:04:49,783 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 22:04:49,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:49,784 INFO L225 Difference]: With dead ends: 128 [2021-03-10 22:04:49,784 INFO L226 Difference]: Without dead ends: 109 [2021-03-10 22:04:49,784 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 538.3ms TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:04:49,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-03-10 22:04:49,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 85. [2021-03-10 22:04:49,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.107142857142857) internal successors, (177), 84 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) [2021-03-10 22:04:49,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 177 transitions. [2021-03-10 22:04:49,785 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 177 transitions. Word has length 16 [2021-03-10 22:04:49,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:49,785 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 177 transitions. [2021-03-10 22:04:49,785 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:49,785 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 177 transitions. [2021-03-10 22:04:49,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 22:04:49,785 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:49,785 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:49,986 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2934,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:49,986 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:49,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:49,986 INFO L82 PathProgramCache]: Analyzing trace with hash 253691383, now seen corresponding path program 60 times [2021-03-10 22:04:49,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:49,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910532653] [2021-03-10 22:04:49,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:49,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:50,133 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:50,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910532653] [2021-03-10 22:04:50,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828521566] [2021-03-10 22:04:50,134 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:50,184 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:04:50,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:50,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 28 conjunts are in the unsatisfiable core [2021-03-10 22:04:50,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:51,110 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:51,110 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:51,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:04:51,116 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:51,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:51,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:51,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:04:51,121 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:51,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:04:51,126 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:51,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:51,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:51,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:04:51,143 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:51,148 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:51,148 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:51,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:51,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:51,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:04:51,155 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:51,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:51,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:51,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:04:51,161 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:51,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:04:51,166 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:51,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:51,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:51,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:04:51,171 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:51,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:51,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:51,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:04:51,177 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:51,181 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:51,182 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:51,186 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:51,186 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:51,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:51,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:51,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-03-10 22:04:51,192 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:51,196 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:51,196 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:51,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:51,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:51,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:04:51,201 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:51,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:51,206 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:51,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-03-10 22:04:51,207 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:51,210 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:51,211 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:51,215 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:51,215 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:51,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:51,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-03-10 22:04:51,220 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:51,406 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 70 [2021-03-10 22:04:51,406 INFO L628 ElimStorePlain]: treesize reduction 62, result has 79.4 percent of original size [2021-03-10 22:04:51,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:04:51,411 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:51,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:04:51,415 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:51,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:04:51,419 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:51,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:04:51,423 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:51,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:04:51,427 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:51,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:04:51,431 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:51,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:04:51,435 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:51,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:04:51,439 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:51,512 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:04:51,515 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-10 22:04:51,515 INFO L247 ElimStorePlain]: Needed 29 recursive calls to eliminate 5 variables, input treesize:830, output treesize:162 [2021-03-10 22:04:51,684 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:51,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:51,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-03-10 22:04:51,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279700813] [2021-03-10 22:04:51,684 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:04:51,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:51,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:04:51,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:04:51,684 INFO L87 Difference]: Start difference. First operand 85 states and 177 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:52,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:52,015 INFO L93 Difference]: Finished difference Result 107 states and 219 transitions. [2021-03-10 22:04:52,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:04:52,015 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 22:04:52,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:52,015 INFO L225 Difference]: With dead ends: 107 [2021-03-10 22:04:52,015 INFO L226 Difference]: Without dead ends: 100 [2021-03-10 22:04:52,015 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 511.8ms TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:04:52,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-03-10 22:04:52,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 86. [2021-03-10 22:04:52,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.1176470588235294) internal successors, (180), 85 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:52,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 180 transitions. [2021-03-10 22:04:52,017 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 180 transitions. Word has length 16 [2021-03-10 22:04:52,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:52,017 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 180 transitions. [2021-03-10 22:04:52,017 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:52,017 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 180 transitions. [2021-03-10 22:04:52,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 22:04:52,017 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:52,017 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:52,219 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2956 [2021-03-10 22:04:52,219 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:52,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:52,219 INFO L82 PathProgramCache]: Analyzing trace with hash 841436705, now seen corresponding path program 61 times [2021-03-10 22:04:52,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:52,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646943706] [2021-03-10 22:04:52,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:52,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:52,374 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:52,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646943706] [2021-03-10 22:04:52,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752753407] [2021-03-10 22:04:52,375 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 22:04:52,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:52,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:04:52,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:53,121 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:53,122 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:53,127 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:53,127 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:53,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:53,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:53,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:04:53,134 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:53,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:53,139 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:53,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:04:53,140 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:53,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:53,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:53,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:04:53,146 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:53,151 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:53,151 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:53,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:53,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:53,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:04:53,166 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:53,170 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:53,171 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:53,175 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:53,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:53,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:04:53,176 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:53,181 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:53,182 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:53,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:53,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:53,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-03-10 22:04:53,187 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:53,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:53,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:53,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-03-10 22:04:53,193 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:53,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:53,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:53,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:04:53,199 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:53,202 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:53,203 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:53,207 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:53,207 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:53,211 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:53,211 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:53,319 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2021-03-10 22:04:53,320 INFO L628 ElimStorePlain]: treesize reduction 18, result has 88.5 percent of original size [2021-03-10 22:04:53,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:04:53,324 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:53,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:04:53,328 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:53,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:04:53,332 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:53,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:04:53,335 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:53,381 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:04:53,383 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:04:53,383 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 5 variables, input treesize:777, output treesize:89 [2021-03-10 22:04:53,545 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:53,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:53,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-03-10 22:04:53,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569767032] [2021-03-10 22:04:53,545 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:04:53,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:53,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:04:53,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:04:53,546 INFO L87 Difference]: Start difference. First operand 86 states and 180 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:53,888 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2021-03-10 22:04:53,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:53,970 INFO L93 Difference]: Finished difference Result 126 states and 253 transitions. [2021-03-10 22:04:53,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:04:53,970 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 22:04:53,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:53,971 INFO L225 Difference]: With dead ends: 126 [2021-03-10 22:04:53,971 INFO L226 Difference]: Without dead ends: 107 [2021-03-10 22:04:53,971 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 634.4ms TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:04:53,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-03-10 22:04:53,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 86. [2021-03-10 22:04:53,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.1176470588235294) internal successors, (180), 85 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:53,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 180 transitions. [2021-03-10 22:04:53,972 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 180 transitions. Word has length 16 [2021-03-10 22:04:53,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:53,972 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 180 transitions. [2021-03-10 22:04:53,973 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:53,973 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 180 transitions. [2021-03-10 22:04:53,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 22:04:53,973 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:53,973 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:54,177 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3255,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:54,177 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:54,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:54,178 INFO L82 PathProgramCache]: Analyzing trace with hash -1689194221, now seen corresponding path program 62 times [2021-03-10 22:04:54,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:54,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040181966] [2021-03-10 22:04:54,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:54,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:54,333 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:54,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040181966] [2021-03-10 22:04:54,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646633306] [2021-03-10 22:04:54,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:54,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:04:54,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:54,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 28 conjunts are in the unsatisfiable core [2021-03-10 22:04:54,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:54,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:04:54,548 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:54,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:04:54,551 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:54,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:04:54,555 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:54,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:04:54,559 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:54,561 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:54,562 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:54,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:04:54,565 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:54,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:04:54,569 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:54,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:04:54,573 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:54,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:04:54,576 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:54,710 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2021-03-10 22:04:54,711 INFO L628 ElimStorePlain]: treesize reduction 30, result has 83.8 percent of original size [2021-03-10 22:04:54,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:04:54,714 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:54,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:04:54,718 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:54,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:04:54,721 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:54,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:04:54,724 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:54,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:04:54,728 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:54,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:04:54,731 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:54,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:04:54,734 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:54,827 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.3 percent of original size [2021-03-10 22:04:54,828 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 7 xjuncts. [2021-03-10 22:04:54,828 INFO L247 ElimStorePlain]: Needed 17 recursive calls to eliminate 3 variables, input treesize:256, output treesize:101 [2021-03-10 22:04:54,929 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:54,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:54,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-03-10 22:04:54,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251822946] [2021-03-10 22:04:54,929 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:04:54,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:54,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:04:54,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:04:54,930 INFO L87 Difference]: Start difference. First operand 86 states and 180 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:55,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:55,422 INFO L93 Difference]: Finished difference Result 113 states and 231 transitions. [2021-03-10 22:04:55,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:04:55,422 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 22:04:55,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:55,423 INFO L225 Difference]: With dead ends: 113 [2021-03-10 22:04:55,423 INFO L226 Difference]: Without dead ends: 106 [2021-03-10 22:04:55,423 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 648.7ms TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:04:55,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-03-10 22:04:55,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 87. [2021-03-10 22:04:55,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 2.127906976744186) internal successors, (183), 86 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) [2021-03-10 22:04:55,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 183 transitions. [2021-03-10 22:04:55,424 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 183 transitions. Word has length 16 [2021-03-10 22:04:55,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:55,424 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 183 transitions. [2021-03-10 22:04:55,424 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:55,424 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 183 transitions. [2021-03-10 22:04:55,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 22:04:55,424 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:55,424 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:55,638 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3441 [2021-03-10 22:04:55,639 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:55,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:55,639 INFO L82 PathProgramCache]: Analyzing trace with hash 2126488399, now seen corresponding path program 63 times [2021-03-10 22:04:55,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:55,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957731315] [2021-03-10 22:04:55,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:55,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:55,783 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:55,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957731315] [2021-03-10 22:04:55,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57421970] [2021-03-10 22:04:55,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:55,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:04:55,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:55,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 28 conjunts are in the unsatisfiable core [2021-03-10 22:04:55,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:55,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:04:55,961 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:55,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:04:55,965 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:55,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:04:55,969 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:55,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:04:55,972 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:55,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:04:55,976 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:56,036 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:04:56,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:04:56,040 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:56,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:04:56,043 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:56,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:04:56,046 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:56,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:04:56,050 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:56,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:04:56,053 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:56,138 INFO L628 ElimStorePlain]: treesize reduction 2, result has 98.2 percent of original size [2021-03-10 22:04:56,139 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 22:04:56,139 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 3 variables, input treesize:157, output treesize:87 [2021-03-10 22:04:56,292 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:56,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:56,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-03-10 22:04:56,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189197180] [2021-03-10 22:04:56,293 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:04:56,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:56,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:04:56,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:04:56,293 INFO L87 Difference]: Start difference. First operand 87 states and 183 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:56,651 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 48 [2021-03-10 22:04:57,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:57,274 INFO L93 Difference]: Finished difference Result 122 states and 248 transitions. [2021-03-10 22:04:57,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:04:57,274 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 22:04:57,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:57,275 INFO L225 Difference]: With dead ends: 122 [2021-03-10 22:04:57,275 INFO L226 Difference]: Without dead ends: 115 [2021-03-10 22:04:57,275 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 1106.5ms TimeCoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:04:57,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-03-10 22:04:57,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 86. [2021-03-10 22:04:57,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.1176470588235294) internal successors, (180), 85 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:57,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 180 transitions. [2021-03-10 22:04:57,276 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 180 transitions. Word has length 16 [2021-03-10 22:04:57,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:57,276 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 180 transitions. [2021-03-10 22:04:57,276 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:57,276 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 180 transitions. [2021-03-10 22:04:57,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 22:04:57,277 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:57,277 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:57,491 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3477,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:57,491 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:57,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:57,491 INFO L82 PathProgramCache]: Analyzing trace with hash 1591258597, now seen corresponding path program 64 times [2021-03-10 22:04:57,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:57,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244382418] [2021-03-10 22:04:57,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:57,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:57,635 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:57,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244382418] [2021-03-10 22:04:57,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110843939] [2021-03-10 22:04:57,636 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:57,678 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:04:57,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:57,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:04:57,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:57,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:04:57,848 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:57,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:04:57,852 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:57,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:04:57,856 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:57,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:04:57,859 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:57,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:04:57,863 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:57,924 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:04:57,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:04:57,928 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:57,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:04:57,931 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:57,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:04:57,935 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:57,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:04:57,938 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:57,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:04:57,941 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:57,993 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:04:57,994 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 22:04:57,994 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 3 variables, input treesize:164, output treesize:96 [2021-03-10 22:04:58,158 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:58,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:04:58,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-03-10 22:04:58,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045799515] [2021-03-10 22:04:58,159 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:04:58,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:04:58,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:04:58,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:04:58,159 INFO L87 Difference]: Start difference. First operand 86 states and 180 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:58,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:04:58,442 INFO L93 Difference]: Finished difference Result 119 states and 243 transitions. [2021-03-10 22:04:58,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:04:58,443 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 22:04:58,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:04:58,443 INFO L225 Difference]: With dead ends: 119 [2021-03-10 22:04:58,443 INFO L226 Difference]: Without dead ends: 107 [2021-03-10 22:04:58,443 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 506.8ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:04:58,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-03-10 22:04:58,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 87. [2021-03-10 22:04:58,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 2.127906976744186) internal successors, (183), 86 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) [2021-03-10 22:04:58,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 183 transitions. [2021-03-10 22:04:58,445 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 183 transitions. Word has length 16 [2021-03-10 22:04:58,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:04:58,445 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 183 transitions. [2021-03-10 22:04:58,445 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:04:58,445 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 183 transitions. [2021-03-10 22:04:58,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 22:04:58,445 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:04:58,445 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:04:58,653 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3500,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:58,653 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:04:58,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:04:58,653 INFO L82 PathProgramCache]: Analyzing trace with hash -2115963377, now seen corresponding path program 65 times [2021-03-10 22:04:58,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:04:58,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795832495] [2021-03-10 22:04:58,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:04:58,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:04:58,846 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:04:58,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795832495] [2021-03-10 22:04:58,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251552838] [2021-03-10 22:04:58,846 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:04:58,881 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:04:58,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:04:58,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:04:58,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:04:59,698 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:59,699 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:59,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:59,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:59,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:04:59,705 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:59,711 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:59,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:04:59,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:04:59,713 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:59,718 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:04:59,718 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:59,866 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 65 [2021-03-10 22:04:59,867 INFO L628 ElimStorePlain]: treesize reduction 413, result has 22.2 percent of original size [2021-03-10 22:04:59,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:04:59,871 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:59,917 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:04:59,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:04:59,922 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:04:59,964 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:04:59,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:04:59,968 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:00,010 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:00,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:05:00,013 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:00,053 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:00,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:05:00,057 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:00,096 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:00,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:05:00,099 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:00,137 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:00,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:05:00,140 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:00,176 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:00,177 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:05:00,177 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 10 variables, input treesize:646, output treesize:73 [2021-03-10 22:05:00,307 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:00,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:00,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-03-10 22:05:00,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31276572] [2021-03-10 22:05:00,307 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:05:00,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:00,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:05:00,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:05:00,308 INFO L87 Difference]: Start difference. First operand 87 states and 183 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:00,451 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 43 [2021-03-10 22:05:00,827 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 44 [2021-03-10 22:05:01,163 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 47 [2021-03-10 22:05:01,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:01,354 INFO L93 Difference]: Finished difference Result 194 states and 372 transitions. [2021-03-10 22:05:01,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:05:01,354 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 22:05:01,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:01,354 INFO L225 Difference]: With dead ends: 194 [2021-03-10 22:05:01,354 INFO L226 Difference]: Without dead ends: 161 [2021-03-10 22:05:01,355 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 1254.6ms TimeCoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:05:01,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-03-10 22:05:01,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 92. [2021-03-10 22:05:01,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.1868131868131866) internal successors, (199), 91 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:01,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 199 transitions. [2021-03-10 22:05:01,356 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 199 transitions. Word has length 16 [2021-03-10 22:05:01,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:01,356 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 199 transitions. [2021-03-10 22:05:01,356 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:01,356 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 199 transitions. [2021-03-10 22:05:01,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 22:05:01,357 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:01,357 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:01,571 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3530 [2021-03-10 22:05:01,571 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:01,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:01,571 INFO L82 PathProgramCache]: Analyzing trace with hash -1518626719, now seen corresponding path program 66 times [2021-03-10 22:05:01,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:01,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23784828] [2021-03-10 22:05:01,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:01,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:01,825 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:01,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23784828] [2021-03-10 22:05:01,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126416570] [2021-03-10 22:05:01,825 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:01,859 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:05:01,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:01,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 29 conjunts are in the unsatisfiable core [2021-03-10 22:05:01,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:02,713 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:05:02,713 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:02,718 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:05:02,718 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:02,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:02,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:02,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:05:02,725 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:02,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:02,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:02,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:05:02,731 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:02,735 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:05:02,736 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:02,886 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 64 [2021-03-10 22:05:02,887 INFO L628 ElimStorePlain]: treesize reduction 488, result has 19.6 percent of original size [2021-03-10 22:05:02,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:05:02,891 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:02,941 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:02,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:05:02,945 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:02,989 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:02,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:05:02,992 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:03,034 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:03,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:05:03,038 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:03,078 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:03,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:05:03,081 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:03,120 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:03,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:05:03,124 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:03,161 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:03,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:05:03,164 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:03,200 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:03,201 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:05:03,201 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 10 variables, input treesize:769, output treesize:73 [2021-03-10 22:05:03,330 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:03,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:03,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-03-10 22:05:03,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987401908] [2021-03-10 22:05:03,331 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:05:03,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:03,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:05:03,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:05:03,331 INFO L87 Difference]: Start difference. First operand 92 states and 199 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:03,615 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 72 [2021-03-10 22:05:03,800 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 64 [2021-03-10 22:05:03,945 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2021-03-10 22:05:04,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:04,034 INFO L93 Difference]: Finished difference Result 161 states and 325 transitions. [2021-03-10 22:05:04,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:05:04,035 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 22:05:04,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:04,035 INFO L225 Difference]: With dead ends: 161 [2021-03-10 22:05:04,035 INFO L226 Difference]: Without dead ends: 142 [2021-03-10 22:05:04,035 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 996.0ms TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:05:04,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-03-10 22:05:04,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 95. [2021-03-10 22:05:04,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.1808510638297873) internal successors, (205), 94 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:04,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 205 transitions. [2021-03-10 22:05:04,037 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 205 transitions. Word has length 16 [2021-03-10 22:05:04,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:04,037 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 205 transitions. [2021-03-10 22:05:04,037 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:04,037 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 205 transitions. [2021-03-10 22:05:04,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 22:05:04,037 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:04,037 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:04,243 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3670 [2021-03-10 22:05:04,243 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:04,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:04,243 INFO L82 PathProgramCache]: Analyzing trace with hash -894827320, now seen corresponding path program 67 times [2021-03-10 22:05:04,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:04,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849512768] [2021-03-10 22:05:04,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:04,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:04,304 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:04,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849512768] [2021-03-10 22:05:04,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559179197] [2021-03-10 22:05:04,304 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:04,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:04,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 22:05:04,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:04,387 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:04,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:04,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-03-10 22:05:04,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678459687] [2021-03-10 22:05:04,387 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 22:05:04,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:04,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 22:05:04,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:05:04,387 INFO L87 Difference]: Start difference. First operand 95 states and 205 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:04,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:04,489 INFO L93 Difference]: Finished difference Result 132 states and 272 transitions. [2021-03-10 22:05:04,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:05:04,490 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 22:05:04,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:04,490 INFO L225 Difference]: With dead ends: 132 [2021-03-10 22:05:04,490 INFO L226 Difference]: Without dead ends: 132 [2021-03-10 22:05:04,490 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 97.5ms TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:05:04,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-03-10 22:05:04,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 99. [2021-03-10 22:05:04,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.173469387755102) internal successors, (213), 98 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:04,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 213 transitions. [2021-03-10 22:05:04,492 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 213 transitions. Word has length 17 [2021-03-10 22:05:04,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:04,492 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 213 transitions. [2021-03-10 22:05:04,492 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:04,492 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 213 transitions. [2021-03-10 22:05:04,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 22:05:04,492 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:04,492 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:04,693 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3800,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:04,693 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:04,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:04,693 INFO L82 PathProgramCache]: Analyzing trace with hash -664171210, now seen corresponding path program 68 times [2021-03-10 22:05:04,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:04,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666606477] [2021-03-10 22:05:04,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:04,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:04,751 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:04,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666606477] [2021-03-10 22:05:04,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763112560] [2021-03-10 22:05:04,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:04,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:05:04,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:04,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 22:05:04,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:04,845 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:04,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:04,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-03-10 22:05:04,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813803211] [2021-03-10 22:05:04,846 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 22:05:04,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:04,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 22:05:04,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:05:04,846 INFO L87 Difference]: Start difference. First operand 99 states and 213 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:04,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:04,956 INFO L93 Difference]: Finished difference Result 131 states and 275 transitions. [2021-03-10 22:05:04,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:05:04,956 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 22:05:04,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:04,957 INFO L225 Difference]: With dead ends: 131 [2021-03-10 22:05:04,957 INFO L226 Difference]: Without dead ends: 131 [2021-03-10 22:05:04,957 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 116.7ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:05:04,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-03-10 22:05:04,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 99. [2021-03-10 22:05:04,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.173469387755102) internal successors, (213), 98 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:04,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 213 transitions. [2021-03-10 22:05:04,958 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 213 transitions. Word has length 17 [2021-03-10 22:05:04,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:04,958 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 213 transitions. [2021-03-10 22:05:04,958 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:04,959 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 213 transitions. [2021-03-10 22:05:04,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 22:05:04,959 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:04,959 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:05,159 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3804 [2021-03-10 22:05:05,159 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:05,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:05,160 INFO L82 PathProgramCache]: Analyzing trace with hash -2049348956, now seen corresponding path program 69 times [2021-03-10 22:05:05,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:05,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263631838] [2021-03-10 22:05:05,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:05,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:05,228 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:05,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263631838] [2021-03-10 22:05:05,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801070490] [2021-03-10 22:05:05,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 22:05:05,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:05:05,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:05,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 22:05:05,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:05,331 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:05,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:05,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-03-10 22:05:05,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351816406] [2021-03-10 22:05:05,331 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 22:05:05,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:05,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 22:05:05,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:05:05,331 INFO L87 Difference]: Start difference. First operand 99 states and 213 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:05,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:05,458 INFO L93 Difference]: Finished difference Result 127 states and 267 transitions. [2021-03-10 22:05:05,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:05:05,459 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 22:05:05,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:05,459 INFO L225 Difference]: With dead ends: 127 [2021-03-10 22:05:05,459 INFO L226 Difference]: Without dead ends: 127 [2021-03-10 22:05:05,459 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 126.0ms TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:05:05,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-03-10 22:05:05,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 100. [2021-03-10 22:05:05,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.1818181818181817) internal successors, (216), 99 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:05,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 216 transitions. [2021-03-10 22:05:05,461 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 216 transitions. Word has length 17 [2021-03-10 22:05:05,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:05,461 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 216 transitions. [2021-03-10 22:05:05,461 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:05,461 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 216 transitions. [2021-03-10 22:05:05,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 22:05:05,461 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:05,461 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:05,669 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3808 [2021-03-10 22:05:05,669 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:05,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:05,670 INFO L82 PathProgramCache]: Analyzing trace with hash -1058993413, now seen corresponding path program 70 times [2021-03-10 22:05:05,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:05,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181501992] [2021-03-10 22:05:05,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:05,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:05,740 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:05,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181501992] [2021-03-10 22:05:05,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166144898] [2021-03-10 22:05:05,740 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:05,776 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:05:05,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:05,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 22:05:05,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:06,010 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:06,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:06,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:05:06,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411993655] [2021-03-10 22:05:06,011 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:05:06,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:06,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:05:06,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:05:06,011 INFO L87 Difference]: Start difference. First operand 100 states and 216 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:06,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:06,270 INFO L93 Difference]: Finished difference Result 137 states and 278 transitions. [2021-03-10 22:05:06,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:05:06,270 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 22:05:06,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:06,271 INFO L225 Difference]: With dead ends: 137 [2021-03-10 22:05:06,271 INFO L226 Difference]: Without dead ends: 131 [2021-03-10 22:05:06,271 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 314.2ms TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:05:06,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-03-10 22:05:06,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 100. [2021-03-10 22:05:06,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.1717171717171717) internal successors, (215), 99 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) [2021-03-10 22:05:06,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 215 transitions. [2021-03-10 22:05:06,272 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 215 transitions. Word has length 17 [2021-03-10 22:05:06,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:06,272 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 215 transitions. [2021-03-10 22:05:06,272 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:06,272 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 215 transitions. [2021-03-10 22:05:06,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 22:05:06,272 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:06,272 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:06,487 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3812 [2021-03-10 22:05:06,487 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:06,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:06,487 INFO L82 PathProgramCache]: Analyzing trace with hash 1231103862, now seen corresponding path program 71 times [2021-03-10 22:05:06,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:06,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703941070] [2021-03-10 22:05:06,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:06,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:06,546 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:06,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703941070] [2021-03-10 22:05:06,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785163840] [2021-03-10 22:05:06,547 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:06,582 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 22:05:06,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:06,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 22:05:06,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:06,654 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:06,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:06,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-03-10 22:05:06,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302750117] [2021-03-10 22:05:06,657 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 22:05:06,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:06,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 22:05:06,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:05:06,657 INFO L87 Difference]: Start difference. First operand 100 states and 215 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:06,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:06,821 INFO L93 Difference]: Finished difference Result 137 states and 280 transitions. [2021-03-10 22:05:06,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:05:06,821 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 22:05:06,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:06,821 INFO L225 Difference]: With dead ends: 137 [2021-03-10 22:05:06,821 INFO L226 Difference]: Without dead ends: 137 [2021-03-10 22:05:06,822 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 159.6ms TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:05:06,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-03-10 22:05:06,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 101. [2021-03-10 22:05:06,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.19) internal successors, (219), 100 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:06,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 219 transitions. [2021-03-10 22:05:06,823 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 219 transitions. Word has length 17 [2021-03-10 22:05:06,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:06,823 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 219 transitions. [2021-03-10 22:05:06,823 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:06,823 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 219 transitions. [2021-03-10 22:05:06,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 22:05:06,823 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:06,823 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:07,037 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3829 [2021-03-10 22:05:07,038 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:07,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:07,038 INFO L82 PathProgramCache]: Analyzing trace with hash 1263050815, now seen corresponding path program 72 times [2021-03-10 22:05:07,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:07,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074904980] [2021-03-10 22:05:07,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:07,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:07,097 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:07,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074904980] [2021-03-10 22:05:07,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759740025] [2021-03-10 22:05:07,098 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 22:05:07,143 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:05:07,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:07,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 22:05:07,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:07,391 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:05:07,392 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:07,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:05:07,396 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:07,486 INFO L628 ElimStorePlain]: treesize reduction 87, result has 48.5 percent of original size [2021-03-10 22:05:07,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:05:07,490 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:07,523 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:07,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:05:07,526 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:07,557 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:07,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:05:07,560 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:07,590 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:07,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:05:07,593 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:07,622 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:07,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:05:07,625 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:07,652 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:07,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:05:07,655 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:07,681 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:07,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:05:07,684 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:07,708 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:07,709 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:05:07,709 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:199, output treesize:13 [2021-03-10 22:05:07,740 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:07,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:07,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:05:07,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884608404] [2021-03-10 22:05:07,741 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:05:07,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:07,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:05:07,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:05:07,741 INFO L87 Difference]: Start difference. First operand 101 states and 219 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:08,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:08,321 INFO L93 Difference]: Finished difference Result 156 states and 311 transitions. [2021-03-10 22:05:08,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:05:08,322 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 22:05:08,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:08,322 INFO L225 Difference]: With dead ends: 156 [2021-03-10 22:05:08,322 INFO L226 Difference]: Without dead ends: 153 [2021-03-10 22:05:08,322 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 640.7ms TimeCoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:05:08,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-03-10 22:05:08,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 105. [2021-03-10 22:05:08,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.1826923076923075) internal successors, (227), 104 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:08,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 227 transitions. [2021-03-10 22:05:08,324 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 227 transitions. Word has length 17 [2021-03-10 22:05:08,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:08,324 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 227 transitions. [2021-03-10 22:05:08,324 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:08,324 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 227 transitions. [2021-03-10 22:05:08,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 22:05:08,324 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:08,324 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:08,535 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3838 [2021-03-10 22:05:08,535 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:08,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:08,535 INFO L82 PathProgramCache]: Analyzing trace with hash 783766139, now seen corresponding path program 73 times [2021-03-10 22:05:08,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:08,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681016862] [2021-03-10 22:05:08,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:08,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:08,622 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:08,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681016862] [2021-03-10 22:05:08,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681078210] [2021-03-10 22:05:08,622 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:08,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:08,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 22:05:08,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:08,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:05:08,968 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:08,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:08,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:05:08,973 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:09,063 INFO L628 ElimStorePlain]: treesize reduction 86, result has 48.8 percent of original size [2021-03-10 22:05:09,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:05:09,067 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:09,100 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:09,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:05:09,103 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:09,134 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:09,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:05:09,138 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:09,168 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:09,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:05:09,171 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:09,200 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:09,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:05:09,203 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:09,230 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:09,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:05:09,233 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:09,258 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:09,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:05:09,262 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:09,288 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:09,289 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:05:09,289 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:199, output treesize:13 [2021-03-10 22:05:09,318 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:09,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:09,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:05:09,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610820756] [2021-03-10 22:05:09,318 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:05:09,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:09,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:05:09,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:05:09,319 INFO L87 Difference]: Start difference. First operand 105 states and 227 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:09,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:09,570 INFO L93 Difference]: Finished difference Result 138 states and 284 transitions. [2021-03-10 22:05:09,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:05:09,570 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 22:05:09,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:09,570 INFO L225 Difference]: With dead ends: 138 [2021-03-10 22:05:09,570 INFO L226 Difference]: Without dead ends: 138 [2021-03-10 22:05:09,570 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 383.8ms TimeCoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:05:09,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-03-10 22:05:09,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 101. [2021-03-10 22:05:09,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.18) internal successors, (218), 100 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:09,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 218 transitions. [2021-03-10 22:05:09,572 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 218 transitions. Word has length 17 [2021-03-10 22:05:09,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:09,572 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 218 transitions. [2021-03-10 22:05:09,572 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:09,572 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 218 transitions. [2021-03-10 22:05:09,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 22:05:09,572 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:09,572 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:09,773 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3862,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:09,773 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:09,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:09,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1191895354, now seen corresponding path program 74 times [2021-03-10 22:05:09,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:09,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135416639] [2021-03-10 22:05:09,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:09,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:09,926 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:09,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135416639] [2021-03-10 22:05:09,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214838662] [2021-03-10 22:05:09,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:10,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:05:10,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:10,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 22:05:10,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:10,095 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:10,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:10,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-03-10 22:05:10,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305611116] [2021-03-10 22:05:10,096 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 22:05:10,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:10,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 22:05:10,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:05:10,096 INFO L87 Difference]: Start difference. First operand 101 states and 218 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:10,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:10,255 INFO L93 Difference]: Finished difference Result 120 states and 252 transitions. [2021-03-10 22:05:10,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:05:10,255 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 22:05:10,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:10,256 INFO L225 Difference]: With dead ends: 120 [2021-03-10 22:05:10,256 INFO L226 Difference]: Without dead ends: 118 [2021-03-10 22:05:10,256 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 201.5ms TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:05:10,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-03-10 22:05:10,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 101. [2021-03-10 22:05:10,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.17) internal successors, (217), 100 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:10,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 217 transitions. [2021-03-10 22:05:10,257 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 217 transitions. Word has length 17 [2021-03-10 22:05:10,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:10,257 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 217 transitions. [2021-03-10 22:05:10,257 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:10,258 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 217 transitions. [2021-03-10 22:05:10,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 22:05:10,258 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:10,258 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:10,471 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3885,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:10,471 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:10,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:10,471 INFO L82 PathProgramCache]: Analyzing trace with hash 241782728, now seen corresponding path program 75 times [2021-03-10 22:05:10,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:10,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507677089] [2021-03-10 22:05:10,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:10,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:10,527 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:10,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507677089] [2021-03-10 22:05:10,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208467074] [2021-03-10 22:05:10,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:10,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:05:10,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:10,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 22:05:10,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:10,619 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:10,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:10,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-03-10 22:05:10,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200217266] [2021-03-10 22:05:10,619 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 22:05:10,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:10,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 22:05:10,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-03-10 22:05:10,619 INFO L87 Difference]: Start difference. First operand 101 states and 217 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:10,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:10,726 INFO L93 Difference]: Finished difference Result 122 states and 258 transitions. [2021-03-10 22:05:10,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:05:10,726 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 22:05:10,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:10,727 INFO L225 Difference]: With dead ends: 122 [2021-03-10 22:05:10,727 INFO L226 Difference]: Without dead ends: 122 [2021-03-10 22:05:10,727 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 111.8ms TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:05:10,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-03-10 22:05:10,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 101. [2021-03-10 22:05:10,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.17) internal successors, (217), 100 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:10,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 217 transitions. [2021-03-10 22:05:10,728 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 217 transitions. Word has length 17 [2021-03-10 22:05:10,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:10,728 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 217 transitions. [2021-03-10 22:05:10,728 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:10,728 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 217 transitions. [2021-03-10 22:05:10,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 22:05:10,729 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:10,729 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:10,929 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3897,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:10,929 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:10,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:10,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1143395018, now seen corresponding path program 76 times [2021-03-10 22:05:10,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:10,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080322509] [2021-03-10 22:05:10,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:10,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:10,985 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:10,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080322509] [2021-03-10 22:05:10,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431048129] [2021-03-10 22:05:10,985 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:11,022 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:05:11,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:11,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 22:05:11,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:11,084 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:11,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:11,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-03-10 22:05:11,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681537258] [2021-03-10 22:05:11,084 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 22:05:11,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:11,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 22:05:11,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:05:11,085 INFO L87 Difference]: Start difference. First operand 101 states and 217 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:11,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:11,184 INFO L93 Difference]: Finished difference Result 135 states and 284 transitions. [2021-03-10 22:05:11,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:05:11,184 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 22:05:11,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:11,185 INFO L225 Difference]: With dead ends: 135 [2021-03-10 22:05:11,185 INFO L226 Difference]: Without dead ends: 135 [2021-03-10 22:05:11,185 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 111.4ms TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:05:11,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-03-10 22:05:11,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 102. [2021-03-10 22:05:11,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.1683168316831685) internal successors, (219), 101 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:11,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 219 transitions. [2021-03-10 22:05:11,186 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 219 transitions. Word has length 17 [2021-03-10 22:05:11,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:11,186 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 219 transitions. [2021-03-10 22:05:11,186 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:11,186 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 219 transitions. [2021-03-10 22:05:11,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 22:05:11,187 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:11,187 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:11,401 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3901,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:11,401 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:11,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:11,401 INFO L82 PathProgramCache]: Analyzing trace with hash -459189108, now seen corresponding path program 77 times [2021-03-10 22:05:11,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:11,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985643502] [2021-03-10 22:05:11,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:11,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:11,473 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:11,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985643502] [2021-03-10 22:05:11,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645571209] [2021-03-10 22:05:11,473 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 22:05:11,513 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 22:05:11,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:11,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 22:05:11,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:11,583 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:11,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:11,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-03-10 22:05:11,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827638594] [2021-03-10 22:05:11,584 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 22:05:11,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:11,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 22:05:11,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:05:11,584 INFO L87 Difference]: Start difference. First operand 102 states and 219 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:11,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:11,687 INFO L93 Difference]: Finished difference Result 133 states and 281 transitions. [2021-03-10 22:05:11,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:05:11,687 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 22:05:11,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:11,688 INFO L225 Difference]: With dead ends: 133 [2021-03-10 22:05:11,688 INFO L226 Difference]: Without dead ends: 133 [2021-03-10 22:05:11,688 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 129.0ms TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:05:11,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-03-10 22:05:11,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 103. [2021-03-10 22:05:11,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.1666666666666665) internal successors, (221), 102 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:11,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 221 transitions. [2021-03-10 22:05:11,689 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 221 transitions. Word has length 17 [2021-03-10 22:05:11,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:11,689 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 221 transitions. [2021-03-10 22:05:11,690 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:11,690 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 221 transitions. [2021-03-10 22:05:11,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 22:05:11,698 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:11,698 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:11,915 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3905 [2021-03-10 22:05:11,915 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:11,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:11,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1689720077, now seen corresponding path program 78 times [2021-03-10 22:05:11,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:11,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726527172] [2021-03-10 22:05:11,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:11,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:11,979 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:11,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726527172] [2021-03-10 22:05:11,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126903586] [2021-03-10 22:05:11,980 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:12,018 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:05:12,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:12,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 22:05:12,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:12,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:05:12,196 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:12,199 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:05:12,199 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:12,260 INFO L628 ElimStorePlain]: treesize reduction 51, result has 52.8 percent of original size [2021-03-10 22:05:12,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:05:12,263 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:12,286 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:12,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:05:12,289 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:12,310 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:12,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:05:12,313 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:12,333 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:12,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:05:12,336 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:12,354 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:12,355 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 5 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:05:12,355 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:140, output treesize:13 [2021-03-10 22:05:12,384 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:12,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:12,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:05:12,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147421088] [2021-03-10 22:05:12,384 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:05:12,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:12,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:05:12,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:05:12,385 INFO L87 Difference]: Start difference. First operand 103 states and 221 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:12,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:12,557 INFO L93 Difference]: Finished difference Result 120 states and 254 transitions. [2021-03-10 22:05:12,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:05:12,558 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 22:05:12,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:12,558 INFO L225 Difference]: With dead ends: 120 [2021-03-10 22:05:12,558 INFO L226 Difference]: Without dead ends: 120 [2021-03-10 22:05:12,558 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 217.1ms TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:05:12,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-03-10 22:05:12,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 102. [2021-03-10 22:05:12,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.1683168316831685) internal successors, (219), 101 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:12,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 219 transitions. [2021-03-10 22:05:12,560 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 219 transitions. Word has length 17 [2021-03-10 22:05:12,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:12,560 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 219 transitions. [2021-03-10 22:05:12,560 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:12,560 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 219 transitions. [2021-03-10 22:05:12,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 22:05:12,560 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:12,560 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:12,760 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3914 [2021-03-10 22:05:12,760 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:12,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:12,761 INFO L82 PathProgramCache]: Analyzing trace with hash -103159220, now seen corresponding path program 79 times [2021-03-10 22:05:12,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:12,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449109806] [2021-03-10 22:05:12,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:12,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:12,841 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:12,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449109806] [2021-03-10 22:05:12,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108541487] [2021-03-10 22:05:12,841 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:12,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:12,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 22:05:12,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:13,008 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:13,009 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:13,009 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:05:13,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268164270] [2021-03-10 22:05:13,009 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:05:13,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:13,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:05:13,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:05:13,009 INFO L87 Difference]: Start difference. First operand 102 states and 219 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:13,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:13,164 INFO L93 Difference]: Finished difference Result 127 states and 268 transitions. [2021-03-10 22:05:13,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:05:13,165 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 22:05:13,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:13,165 INFO L225 Difference]: With dead ends: 127 [2021-03-10 22:05:13,165 INFO L226 Difference]: Without dead ends: 127 [2021-03-10 22:05:13,165 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 160.0ms TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:05:13,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-03-10 22:05:13,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 102. [2021-03-10 22:05:13,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.1683168316831685) internal successors, (219), 101 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:13,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 219 transitions. [2021-03-10 22:05:13,167 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 219 transitions. Word has length 17 [2021-03-10 22:05:13,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:13,167 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 219 transitions. [2021-03-10 22:05:13,167 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:13,167 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 219 transitions. [2021-03-10 22:05:13,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 22:05:13,167 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:13,167 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:13,379 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3937,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:13,379 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:13,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:13,379 INFO L82 PathProgramCache]: Analyzing trace with hash -1117673698, now seen corresponding path program 80 times [2021-03-10 22:05:13,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:13,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558179763] [2021-03-10 22:05:13,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:13,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:13,480 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:13,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558179763] [2021-03-10 22:05:13,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681892325] [2021-03-10 22:05:13,480 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:13,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:05:13,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:13,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 22:05:13,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:13,760 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:13,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:13,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:05:13,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204017234] [2021-03-10 22:05:13,760 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:05:13,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:13,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:05:13,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:05:13,761 INFO L87 Difference]: Start difference. First operand 102 states and 219 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:14,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:14,021 INFO L93 Difference]: Finished difference Result 142 states and 298 transitions. [2021-03-10 22:05:14,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:05:14,021 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 22:05:14,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:14,022 INFO L225 Difference]: With dead ends: 142 [2021-03-10 22:05:14,022 INFO L226 Difference]: Without dead ends: 142 [2021-03-10 22:05:14,022 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 248.3ms TimeCoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:05:14,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-03-10 22:05:14,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 103. [2021-03-10 22:05:14,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.1666666666666665) internal successors, (221), 102 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:14,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 221 transitions. [2021-03-10 22:05:14,024 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 221 transitions. Word has length 17 [2021-03-10 22:05:14,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:14,024 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 221 transitions. [2021-03-10 22:05:14,024 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:14,024 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 221 transitions. [2021-03-10 22:05:14,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 22:05:14,024 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:14,024 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:14,224 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3967 [2021-03-10 22:05:14,224 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:14,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:14,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1565011421, now seen corresponding path program 81 times [2021-03-10 22:05:14,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:14,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276972933] [2021-03-10 22:05:14,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:14,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:14,286 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:14,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276972933] [2021-03-10 22:05:14,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208527410] [2021-03-10 22:05:14,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:14,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:05:14,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:14,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 22:05:14,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:14,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:05:14,452 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:14,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:14,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:05:14,455 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:14,513 INFO L628 ElimStorePlain]: treesize reduction 51, result has 51.4 percent of original size [2021-03-10 22:05:14,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:05:14,516 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:14,537 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:14,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:05:14,540 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:14,560 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:14,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:05:14,563 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:14,582 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:14,583 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:05:14,583 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 7 variables, input treesize:128, output treesize:13 [2021-03-10 22:05:14,612 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:14,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:14,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:05:14,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854100209] [2021-03-10 22:05:14,612 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:05:14,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:14,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:05:14,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:05:14,612 INFO L87 Difference]: Start difference. First operand 103 states and 221 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:14,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:14,751 INFO L93 Difference]: Finished difference Result 118 states and 250 transitions. [2021-03-10 22:05:14,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:05:14,751 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 22:05:14,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:14,752 INFO L225 Difference]: With dead ends: 118 [2021-03-10 22:05:14,752 INFO L226 Difference]: Without dead ends: 118 [2021-03-10 22:05:14,752 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 178.4ms TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:05:14,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-03-10 22:05:14,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 101. [2021-03-10 22:05:14,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.17) internal successors, (217), 100 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:14,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 217 transitions. [2021-03-10 22:05:14,753 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 217 transitions. Word has length 17 [2021-03-10 22:05:14,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:14,753 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 217 transitions. [2021-03-10 22:05:14,753 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:14,753 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 217 transitions. [2021-03-10 22:05:14,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 22:05:14,754 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:14,754 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:14,967 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4008,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:14,967 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:14,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:14,967 INFO L82 PathProgramCache]: Analyzing trace with hash -529928376, now seen corresponding path program 82 times [2021-03-10 22:05:14,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:14,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486566766] [2021-03-10 22:05:14,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:14,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:15,158 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:15,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486566766] [2021-03-10 22:05:15,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303833233] [2021-03-10 22:05:15,160 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:15,249 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:05:15,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:15,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 22:05:15,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:15,440 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:15,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:15,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:05:15,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056746806] [2021-03-10 22:05:15,440 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:05:15,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:15,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:05:15,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:05:15,441 INFO L87 Difference]: Start difference. First operand 101 states and 217 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:15,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:15,568 INFO L93 Difference]: Finished difference Result 135 states and 276 transitions. [2021-03-10 22:05:15,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:05:15,568 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 22:05:15,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:15,568 INFO L225 Difference]: With dead ends: 135 [2021-03-10 22:05:15,568 INFO L226 Difference]: Without dead ends: 135 [2021-03-10 22:05:15,569 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 304.4ms TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:05:15,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-03-10 22:05:15,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 102. [2021-03-10 22:05:15,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.1782178217821784) internal successors, (220), 101 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:15,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 220 transitions. [2021-03-10 22:05:15,570 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 220 transitions. Word has length 17 [2021-03-10 22:05:15,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:15,570 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 220 transitions. [2021-03-10 22:05:15,570 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:15,570 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 220 transitions. [2021-03-10 22:05:15,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 22:05:15,570 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:15,570 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:15,779 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4028,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:15,779 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:15,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:15,779 INFO L82 PathProgramCache]: Analyzing trace with hash -1512495901, now seen corresponding path program 83 times [2021-03-10 22:05:15,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:15,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637899712] [2021-03-10 22:05:15,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:15,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:15,849 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:15,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637899712] [2021-03-10 22:05:15,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474804134] [2021-03-10 22:05:15,850 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:15,887 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:05:15,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:15,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 22:05:15,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:16,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:16,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:16,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:05:16,032 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:16,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:16,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:16,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:05:16,036 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:16,038 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:05:16,039 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:16,041 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:05:16,041 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:16,053 INFO L628 ElimStorePlain]: treesize reduction 4, result has 81.8 percent of original size [2021-03-10 22:05:16,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:05:16,055 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:16,060 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:16,060 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:05:16,060 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:114, output treesize:6 [2021-03-10 22:05:16,067 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:16,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:16,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:05:16,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890721144] [2021-03-10 22:05:16,067 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:05:16,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:16,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:05:16,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:05:16,068 INFO L87 Difference]: Start difference. First operand 102 states and 220 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:16,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:16,205 INFO L93 Difference]: Finished difference Result 127 states and 268 transitions. [2021-03-10 22:05:16,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:05:16,205 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 22:05:16,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:16,206 INFO L225 Difference]: With dead ends: 127 [2021-03-10 22:05:16,206 INFO L226 Difference]: Without dead ends: 127 [2021-03-10 22:05:16,206 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 158.5ms TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:05:16,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-03-10 22:05:16,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 102. [2021-03-10 22:05:16,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.1782178217821784) internal successors, (220), 101 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:16,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 220 transitions. [2021-03-10 22:05:16,208 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 220 transitions. Word has length 17 [2021-03-10 22:05:16,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:16,208 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 220 transitions. [2021-03-10 22:05:16,208 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:16,208 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 220 transitions. [2021-03-10 22:05:16,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 22:05:16,208 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:16,208 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:16,409 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4051,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:16,409 INFO L428 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:16,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:16,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1877216436, now seen corresponding path program 84 times [2021-03-10 22:05:16,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:16,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354067394] [2021-03-10 22:05:16,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:16,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:16,474 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:16,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354067394] [2021-03-10 22:05:16,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872203313] [2021-03-10 22:05:16,474 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 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 [2021-03-10 22:05:16,513 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:05:16,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:16,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 22:05:16,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:16,648 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:16,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:16,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:05:16,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233164497] [2021-03-10 22:05:16,648 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:05:16,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:16,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:05:16,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:05:16,649 INFO L87 Difference]: Start difference. First operand 102 states and 220 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:16,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:16,778 INFO L93 Difference]: Finished difference Result 117 states and 246 transitions. [2021-03-10 22:05:16,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:05:16,778 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 22:05:16,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:16,778 INFO L225 Difference]: With dead ends: 117 [2021-03-10 22:05:16,779 INFO L226 Difference]: Without dead ends: 113 [2021-03-10 22:05:16,779 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 195.3ms TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:05:16,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-03-10 22:05:16,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 102. [2021-03-10 22:05:16,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.1683168316831685) internal successors, (219), 101 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:16,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 219 transitions. [2021-03-10 22:05:16,780 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 219 transitions. Word has length 17 [2021-03-10 22:05:16,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:16,780 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 219 transitions. [2021-03-10 22:05:16,780 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:16,780 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 219 transitions. [2021-03-10 22:05:16,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 22:05:16,780 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:16,780 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:16,994 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4088 [2021-03-10 22:05:16,995 INFO L428 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:16,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:16,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1738416266, now seen corresponding path program 85 times [2021-03-10 22:05:16,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:16,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45260622] [2021-03-10 22:05:16,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:16,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:17,054 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:17,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45260622] [2021-03-10 22:05:17,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793838301] [2021-03-10 22:05:17,054 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:17,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:17,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 22:05:17,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:17,227 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:17,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:17,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:05:17,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372792484] [2021-03-10 22:05:17,227 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:05:17,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:17,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:05:17,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:05:17,228 INFO L87 Difference]: Start difference. First operand 102 states and 219 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:17,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:17,363 INFO L93 Difference]: Finished difference Result 121 states and 257 transitions. [2021-03-10 22:05:17,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:05:17,364 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 22:05:17,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:17,364 INFO L225 Difference]: With dead ends: 121 [2021-03-10 22:05:17,364 INFO L226 Difference]: Without dead ends: 121 [2021-03-10 22:05:17,364 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 178.6ms TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:05:17,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-03-10 22:05:17,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 102. [2021-03-10 22:05:17,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.1683168316831685) internal successors, (219), 101 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:17,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 219 transitions. [2021-03-10 22:05:17,366 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 219 transitions. Word has length 17 [2021-03-10 22:05:17,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:17,366 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 219 transitions. [2021-03-10 22:05:17,366 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:17,366 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 219 transitions. [2021-03-10 22:05:17,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 22:05:17,366 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:17,366 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:17,571 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4107,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:17,571 INFO L428 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:17,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:17,571 INFO L82 PathProgramCache]: Analyzing trace with hash 1171373284, now seen corresponding path program 86 times [2021-03-10 22:05:17,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:17,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686961247] [2021-03-10 22:05:17,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:17,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:17,645 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:17,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686961247] [2021-03-10 22:05:17,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858195039] [2021-03-10 22:05:17,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:17,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:05:17,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:17,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 22:05:17,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:17,853 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:17,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:17,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:05:17,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491994526] [2021-03-10 22:05:17,854 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:05:17,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:17,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:05:17,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:05:17,854 INFO L87 Difference]: Start difference. First operand 102 states and 219 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:18,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:18,045 INFO L93 Difference]: Finished difference Result 133 states and 281 transitions. [2021-03-10 22:05:18,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:05:18,045 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 22:05:18,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:18,046 INFO L225 Difference]: With dead ends: 133 [2021-03-10 22:05:18,046 INFO L226 Difference]: Without dead ends: 133 [2021-03-10 22:05:18,046 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 237.0ms TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:05:18,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-03-10 22:05:18,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 102. [2021-03-10 22:05:18,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.1683168316831685) internal successors, (219), 101 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:18,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 219 transitions. [2021-03-10 22:05:18,047 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 219 transitions. Word has length 17 [2021-03-10 22:05:18,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:18,047 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 219 transitions. [2021-03-10 22:05:18,047 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:18,047 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 219 transitions. [2021-03-10 22:05:18,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 22:05:18,048 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:18,048 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:18,262 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4123 [2021-03-10 22:05:18,262 INFO L428 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:18,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:18,263 INFO L82 PathProgramCache]: Analyzing trace with hash 156858806, now seen corresponding path program 87 times [2021-03-10 22:05:18,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:18,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231146204] [2021-03-10 22:05:18,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:18,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:18,336 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:18,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231146204] [2021-03-10 22:05:18,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045256273] [2021-03-10 22:05:18,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:18,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 22:05:18,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:18,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 22:05:18,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:18,620 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:18,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:18,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:05:18,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927594734] [2021-03-10 22:05:18,620 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:05:18,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:18,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:05:18,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:05:18,621 INFO L87 Difference]: Start difference. First operand 102 states and 219 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:18,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:18,864 INFO L93 Difference]: Finished difference Result 135 states and 285 transitions. [2021-03-10 22:05:18,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:05:18,865 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 22:05:18,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:18,865 INFO L225 Difference]: With dead ends: 135 [2021-03-10 22:05:18,865 INFO L226 Difference]: Without dead ends: 135 [2021-03-10 22:05:18,865 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 283.5ms TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:05:18,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-03-10 22:05:18,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 98. [2021-03-10 22:05:18,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.1752577319587627) internal successors, (211), 97 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:18,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 211 transitions. [2021-03-10 22:05:18,867 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 211 transitions. Word has length 17 [2021-03-10 22:05:18,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:18,867 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 211 transitions. [2021-03-10 22:05:18,867 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:18,867 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 211 transitions. [2021-03-10 22:05:18,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 22:05:18,867 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:18,867 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:19,081 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4153 [2021-03-10 22:05:19,081 INFO L428 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:19,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:19,081 INFO L82 PathProgramCache]: Analyzing trace with hash 99180452, now seen corresponding path program 88 times [2021-03-10 22:05:19,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:19,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633890336] [2021-03-10 22:05:19,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:19,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:19,145 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:19,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633890336] [2021-03-10 22:05:19,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890283077] [2021-03-10 22:05:19,145 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 22:05:19,183 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:05:19,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:19,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 22:05:19,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:19,339 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:19,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:19,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:05:19,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252469844] [2021-03-10 22:05:19,339 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:05:19,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:19,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:05:19,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:05:19,339 INFO L87 Difference]: Start difference. First operand 98 states and 211 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:19,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:19,469 INFO L93 Difference]: Finished difference Result 121 states and 257 transitions. [2021-03-10 22:05:19,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:05:19,469 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 22:05:19,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:19,470 INFO L225 Difference]: With dead ends: 121 [2021-03-10 22:05:19,470 INFO L226 Difference]: Without dead ends: 121 [2021-03-10 22:05:19,470 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 156.2ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:05:19,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-03-10 22:05:19,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 99. [2021-03-10 22:05:19,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.173469387755102) internal successors, (213), 98 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:19,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 213 transitions. [2021-03-10 22:05:19,471 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 213 transitions. Word has length 17 [2021-03-10 22:05:19,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:19,471 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 213 transitions. [2021-03-10 22:05:19,471 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:19,471 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 213 transitions. [2021-03-10 22:05:19,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 22:05:19,471 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:19,471 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:19,675 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4211 [2021-03-10 22:05:19,675 INFO L428 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:19,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:19,675 INFO L82 PathProgramCache]: Analyzing trace with hash -915334026, now seen corresponding path program 89 times [2021-03-10 22:05:19,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:19,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88796499] [2021-03-10 22:05:19,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:19,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:19,760 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:19,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88796499] [2021-03-10 22:05:19,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460089804] [2021-03-10 22:05:19,760 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:19,816 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 22:05:19,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:19,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 22:05:19,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:20,028 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:20,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:20,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:05:20,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36035276] [2021-03-10 22:05:20,028 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:05:20,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:20,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:05:20,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:05:20,029 INFO L87 Difference]: Start difference. First operand 99 states and 213 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:20,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:20,167 INFO L93 Difference]: Finished difference Result 149 states and 307 transitions. [2021-03-10 22:05:20,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:05:20,167 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 22:05:20,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:20,168 INFO L225 Difference]: With dead ends: 149 [2021-03-10 22:05:20,168 INFO L226 Difference]: Without dead ends: 149 [2021-03-10 22:05:20,168 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 175.5ms TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:05:20,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-03-10 22:05:20,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 100. [2021-03-10 22:05:20,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.191919191919192) internal successors, (217), 99 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:20,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 217 transitions. [2021-03-10 22:05:20,169 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 217 transitions. Word has length 17 [2021-03-10 22:05:20,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:20,169 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 217 transitions. [2021-03-10 22:05:20,169 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:20,169 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 217 transitions. [2021-03-10 22:05:20,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 22:05:20,170 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:20,170 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:20,370 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4240,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:20,370 INFO L428 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:20,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:20,370 INFO L82 PathProgramCache]: Analyzing trace with hash -883387073, now seen corresponding path program 90 times [2021-03-10 22:05:20,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:20,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088068484] [2021-03-10 22:05:20,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:20,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:20,432 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:20,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088068484] [2021-03-10 22:05:20,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861556781] [2021-03-10 22:05:20,433 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:20,472 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:05:20,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:20,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 22:05:20,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:20,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:05:20,628 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:20,631 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:05:20,632 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:20,720 INFO L628 ElimStorePlain]: treesize reduction 86, result has 48.5 percent of original size [2021-03-10 22:05:20,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:05:20,724 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:20,757 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:20,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:05:20,760 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:20,791 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:20,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:05:20,795 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:20,824 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:20,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:05:20,828 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:20,856 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:20,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:05:20,859 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:20,886 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:20,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:05:20,890 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:20,915 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:20,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:05:20,918 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:20,943 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:20,944 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:05:20,944 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:199, output treesize:13 [2021-03-10 22:05:20,975 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:20,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:20,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:05:20,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606629291] [2021-03-10 22:05:20,975 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:05:20,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:20,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:05:20,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:05:20,975 INFO L87 Difference]: Start difference. First operand 100 states and 217 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:21,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:21,157 INFO L93 Difference]: Finished difference Result 135 states and 276 transitions. [2021-03-10 22:05:21,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:05:21,157 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 22:05:21,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:21,158 INFO L225 Difference]: With dead ends: 135 [2021-03-10 22:05:21,158 INFO L226 Difference]: Without dead ends: 132 [2021-03-10 22:05:21,158 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 222.4ms TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:05:21,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-03-10 22:05:21,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 104. [2021-03-10 22:05:21,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.1844660194174756) internal successors, (225), 103 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:21,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 225 transitions. [2021-03-10 22:05:21,159 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 225 transitions. Word has length 17 [2021-03-10 22:05:21,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:21,159 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 225 transitions. [2021-03-10 22:05:21,160 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:21,160 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 225 transitions. [2021-03-10 22:05:21,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 22:05:21,160 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:21,160 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:21,374 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4283 [2021-03-10 22:05:21,374 INFO L428 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:21,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:21,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1362671749, now seen corresponding path program 91 times [2021-03-10 22:05:21,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:21,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676324367] [2021-03-10 22:05:21,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:21,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:21,740 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:21,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676324367] [2021-03-10 22:05:21,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744003582] [2021-03-10 22:05:21,741 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:21,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:21,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 22:05:21,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:21,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:21,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:21,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:05:21,941 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:21,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:05:21,945 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:22,012 INFO L628 ElimStorePlain]: treesize reduction 59, result has 49.6 percent of original size [2021-03-10 22:05:22,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:05:22,016 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:22,048 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:22,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:05:22,052 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:22,078 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:22,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:05:22,082 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:22,106 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:22,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:05:22,110 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:22,132 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:22,133 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 5 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:05:22,133 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:140, output treesize:13 [2021-03-10 22:05:22,165 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:22,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:22,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:05:22,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587606839] [2021-03-10 22:05:22,165 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:05:22,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:22,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:05:22,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:05:22,166 INFO L87 Difference]: Start difference. First operand 104 states and 225 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:22,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:22,280 INFO L93 Difference]: Finished difference Result 114 states and 243 transitions. [2021-03-10 22:05:22,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:05:22,280 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 22:05:22,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:22,281 INFO L225 Difference]: With dead ends: 114 [2021-03-10 22:05:22,281 INFO L226 Difference]: Without dead ends: 114 [2021-03-10 22:05:22,281 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 414.4ms TimeCoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:05:22,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-03-10 22:05:22,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 100. [2021-03-10 22:05:22,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.1818181818181817) internal successors, (216), 99 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:22,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 216 transitions. [2021-03-10 22:05:22,285 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 216 transitions. Word has length 17 [2021-03-10 22:05:22,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:22,285 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 216 transitions. [2021-03-10 22:05:22,285 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:22,285 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 216 transitions. [2021-03-10 22:05:22,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 22:05:22,285 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:22,285 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:22,500 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4306 [2021-03-10 22:05:22,500 INFO L428 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:22,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:22,500 INFO L82 PathProgramCache]: Analyzing trace with hash 956634054, now seen corresponding path program 92 times [2021-03-10 22:05:22,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:22,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378494007] [2021-03-10 22:05:22,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:22,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:22,606 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:22,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378494007] [2021-03-10 22:05:22,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147630735] [2021-03-10 22:05:22,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 22:05:22,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:05:22,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:22,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 22:05:22,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:22,914 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:22,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:22,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:05:22,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507830532] [2021-03-10 22:05:22,915 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:05:22,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:22,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:05:22,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:05:22,915 INFO L87 Difference]: Start difference. First operand 100 states and 216 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:23,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:23,051 INFO L93 Difference]: Finished difference Result 130 states and 273 transitions. [2021-03-10 22:05:23,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:05:23,051 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 22:05:23,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:23,052 INFO L225 Difference]: With dead ends: 130 [2021-03-10 22:05:23,052 INFO L226 Difference]: Without dead ends: 128 [2021-03-10 22:05:23,052 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 178.8ms TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:05:23,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-03-10 22:05:23,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 98. [2021-03-10 22:05:23,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.1752577319587627) internal successors, (211), 97 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:23,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 211 transitions. [2021-03-10 22:05:23,062 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 211 transitions. Word has length 17 [2021-03-10 22:05:23,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:23,062 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 211 transitions. [2021-03-10 22:05:23,062 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:23,062 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 211 transitions. [2021-03-10 22:05:23,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 22:05:23,062 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:23,062 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:23,271 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4325,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:23,271 INFO L428 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:23,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:23,272 INFO L82 PathProgramCache]: Analyzing trace with hash -327588704, now seen corresponding path program 93 times [2021-03-10 22:05:23,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:23,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508865069] [2021-03-10 22:05:23,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:23,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:23,359 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:23,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508865069] [2021-03-10 22:05:23,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728919015] [2021-03-10 22:05:23,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:23,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 22:05:23,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:23,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 22:05:23,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:23,630 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:23,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:23,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:05:23,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711938916] [2021-03-10 22:05:23,630 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:05:23,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:23,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:05:23,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:05:23,631 INFO L87 Difference]: Start difference. First operand 98 states and 211 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:23,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:23,743 INFO L93 Difference]: Finished difference Result 127 states and 261 transitions. [2021-03-10 22:05:23,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:05:23,743 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 22:05:23,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:23,744 INFO L225 Difference]: With dead ends: 127 [2021-03-10 22:05:23,744 INFO L226 Difference]: Without dead ends: 127 [2021-03-10 22:05:23,744 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 191.6ms TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:05:23,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-03-10 22:05:23,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 99. [2021-03-10 22:05:23,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.183673469387755) internal successors, (214), 98 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:23,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 214 transitions. [2021-03-10 22:05:23,745 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 214 transitions. Word has length 17 [2021-03-10 22:05:23,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:23,745 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 214 transitions. [2021-03-10 22:05:23,745 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:23,745 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 214 transitions. [2021-03-10 22:05:23,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 22:05:23,746 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:23,746 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:23,946 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4398 [2021-03-10 22:05:23,946 INFO L428 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:23,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:23,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1310156229, now seen corresponding path program 94 times [2021-03-10 22:05:23,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:23,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031561738] [2021-03-10 22:05:23,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:23,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:24,010 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:24,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031561738] [2021-03-10 22:05:24,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417466624] [2021-03-10 22:05:24,011 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:24,050 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:05:24,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:24,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 22:05:24,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:24,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:24,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:24,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:05:24,190 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:24,192 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:05:24,192 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:24,201 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:05:24,201 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:24,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:24,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:05:24,204 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:24,216 INFO L628 ElimStorePlain]: treesize reduction 4, result has 81.8 percent of original size [2021-03-10 22:05:24,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:05:24,218 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:24,223 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:24,223 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:05:24,223 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:114, output treesize:6 [2021-03-10 22:05:24,230 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:24,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:24,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:05:24,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475875552] [2021-03-10 22:05:24,230 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:05:24,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:24,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:05:24,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:05:24,231 INFO L87 Difference]: Start difference. First operand 99 states and 214 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:24,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:24,379 INFO L93 Difference]: Finished difference Result 122 states and 259 transitions. [2021-03-10 22:05:24,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:05:24,380 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 22:05:24,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:24,380 INFO L225 Difference]: With dead ends: 122 [2021-03-10 22:05:24,380 INFO L226 Difference]: Without dead ends: 122 [2021-03-10 22:05:24,380 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 167.0ms TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:05:24,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-03-10 22:05:24,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 99. [2021-03-10 22:05:24,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.183673469387755) internal successors, (214), 98 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:24,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 214 transitions. [2021-03-10 22:05:24,382 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 214 transitions. Word has length 17 [2021-03-10 22:05:24,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:24,382 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 214 transitions. [2021-03-10 22:05:24,382 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:24,382 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 214 transitions. [2021-03-10 22:05:24,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 22:05:24,383 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:24,383 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:24,594 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4456,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:24,594 INFO L428 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:24,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:24,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1674876764, now seen corresponding path program 95 times [2021-03-10 22:05:24,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:24,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392254335] [2021-03-10 22:05:24,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:24,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:24,659 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:24,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392254335] [2021-03-10 22:05:24,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130119474] [2021-03-10 22:05:24,660 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 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 [2021-03-10 22:05:24,699 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:05:24,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:24,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 22:05:24,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:24,863 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:24,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:24,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:05:24,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858924526] [2021-03-10 22:05:24,864 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:05:24,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:24,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:05:24,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:05:24,864 INFO L87 Difference]: Start difference. First operand 99 states and 214 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:25,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:25,025 INFO L93 Difference]: Finished difference Result 112 states and 236 transitions. [2021-03-10 22:05:25,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:05:25,025 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 22:05:25,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:25,026 INFO L225 Difference]: With dead ends: 112 [2021-03-10 22:05:25,026 INFO L226 Difference]: Without dead ends: 108 [2021-03-10 22:05:25,026 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 223.0ms TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:05:25,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-03-10 22:05:25,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 97. [2021-03-10 22:05:25,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.1770833333333335) internal successors, (209), 96 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:25,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 209 transitions. [2021-03-10 22:05:25,027 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 209 transitions. Word has length 17 [2021-03-10 22:05:25,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:25,027 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 209 transitions. [2021-03-10 22:05:25,027 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:25,028 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 209 transitions. [2021-03-10 22:05:25,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 22:05:25,028 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:25,028 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:25,239 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4485 [2021-03-10 22:05:25,239 INFO L428 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:25,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:25,239 INFO L82 PathProgramCache]: Analyzing trace with hash 712647094, now seen corresponding path program 96 times [2021-03-10 22:05:25,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:25,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586895930] [2021-03-10 22:05:25,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:25,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:25,308 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:25,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586895930] [2021-03-10 22:05:25,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884941604] [2021-03-10 22:05:25,308 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:25,350 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 22:05:25,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:25,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 22:05:25,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:25,536 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:25,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:25,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:05:25,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178836899] [2021-03-10 22:05:25,536 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:05:25,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:25,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:05:25,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:05:25,537 INFO L87 Difference]: Start difference. First operand 97 states and 209 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:25,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:25,752 INFO L93 Difference]: Finished difference Result 134 states and 273 transitions. [2021-03-10 22:05:25,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:05:25,752 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 22:05:25,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:25,753 INFO L225 Difference]: With dead ends: 134 [2021-03-10 22:05:25,753 INFO L226 Difference]: Without dead ends: 134 [2021-03-10 22:05:25,753 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 279.8ms TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:05:25,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-03-10 22:05:25,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 99. [2021-03-10 22:05:25,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.193877551020408) internal successors, (215), 98 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) [2021-03-10 22:05:25,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 215 transitions. [2021-03-10 22:05:25,754 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 215 transitions. Word has length 17 [2021-03-10 22:05:25,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:25,754 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 215 transitions. [2021-03-10 22:05:25,754 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:25,754 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 215 transitions. [2021-03-10 22:05:25,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 22:05:25,755 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:25,755 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:25,963 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4503 [2021-03-10 22:05:25,963 INFO L428 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:25,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:25,963 INFO L82 PathProgramCache]: Analyzing trace with hash -269920431, now seen corresponding path program 97 times [2021-03-10 22:05:25,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:25,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169032377] [2021-03-10 22:05:25,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:25,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:26,027 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:26,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169032377] [2021-03-10 22:05:26,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216524898] [2021-03-10 22:05:26,027 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:26,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:26,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 22:05:26,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:26,197 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:05:26,197 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:26,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:26,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:26,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:05:26,201 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:26,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:26,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:05:26,204 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:26,215 INFO L628 ElimStorePlain]: treesize reduction 4, result has 81.8 percent of original size [2021-03-10 22:05:26,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:05:26,218 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:26,222 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:26,223 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:05:26,223 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:79, output treesize:6 [2021-03-10 22:05:26,229 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:26,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:26,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:05:26,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811509317] [2021-03-10 22:05:26,230 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:05:26,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:26,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:05:26,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:05:26,230 INFO L87 Difference]: Start difference. First operand 99 states and 215 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:26,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:26,393 INFO L93 Difference]: Finished difference Result 118 states and 251 transitions. [2021-03-10 22:05:26,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:05:26,393 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 22:05:26,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:26,394 INFO L225 Difference]: With dead ends: 118 [2021-03-10 22:05:26,394 INFO L226 Difference]: Without dead ends: 118 [2021-03-10 22:05:26,394 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 215.9ms TimeCoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:05:26,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-03-10 22:05:26,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 101. [2021-03-10 22:05:26,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.21) internal successors, (221), 100 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:26,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 221 transitions. [2021-03-10 22:05:26,400 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 221 transitions. Word has length 17 [2021-03-10 22:05:26,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:26,400 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 221 transitions. [2021-03-10 22:05:26,400 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:26,400 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 221 transitions. [2021-03-10 22:05:26,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 22:05:26,400 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:26,400 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:26,603 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4534,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:26,603 INFO L428 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:26,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:26,603 INFO L82 PathProgramCache]: Analyzing trace with hash -634640966, now seen corresponding path program 98 times [2021-03-10 22:05:26,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:26,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430284587] [2021-03-10 22:05:26,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:26,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:26,661 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:26,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430284587] [2021-03-10 22:05:26,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981583070] [2021-03-10 22:05:26,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:26,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:05:26,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:26,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 22:05:26,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:26,839 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:26,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:26,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:05:26,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73135150] [2021-03-10 22:05:26,840 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:05:26,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:26,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:05:26,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:05:26,840 INFO L87 Difference]: Start difference. First operand 101 states and 221 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:27,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:27,058 INFO L93 Difference]: Finished difference Result 123 states and 259 transitions. [2021-03-10 22:05:27,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:05:27,058 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 22:05:27,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:27,058 INFO L225 Difference]: With dead ends: 123 [2021-03-10 22:05:27,058 INFO L226 Difference]: Without dead ends: 119 [2021-03-10 22:05:27,058 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 247.7ms TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:05:27,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-03-10 22:05:27,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 100. [2021-03-10 22:05:27,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.202020202020202) internal successors, (218), 99 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:27,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 218 transitions. [2021-03-10 22:05:27,060 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 218 transitions. Word has length 17 [2021-03-10 22:05:27,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:27,060 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 218 transitions. [2021-03-10 22:05:27,060 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:27,060 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 218 transitions. [2021-03-10 22:05:27,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 22:05:27,060 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:27,060 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:27,271 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4554,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:27,271 INFO L428 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:27,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:27,271 INFO L82 PathProgramCache]: Analyzing trace with hash 317824891, now seen corresponding path program 99 times [2021-03-10 22:05:27,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:27,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729948395] [2021-03-10 22:05:27,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:27,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:27,364 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:27,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729948395] [2021-03-10 22:05:27,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218999544] [2021-03-10 22:05:27,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:27,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:05:27,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:27,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 22:05:27,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:27,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:27,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:27,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:05:27,559 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:27,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:27,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:05:27,562 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:27,580 INFO L628 ElimStorePlain]: treesize reduction 25, result has 41.9 percent of original size [2021-03-10 22:05:27,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:05:27,583 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:27,587 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:27,588 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:05:27,588 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:71, output treesize:6 [2021-03-10 22:05:27,595 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:27,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:27,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:05:27,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293571652] [2021-03-10 22:05:27,595 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:05:27,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:27,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:05:27,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:05:27,595 INFO L87 Difference]: Start difference. First operand 100 states and 218 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:27,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:27,729 INFO L93 Difference]: Finished difference Result 118 states and 251 transitions. [2021-03-10 22:05:27,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:05:27,729 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 22:05:27,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:27,730 INFO L225 Difference]: With dead ends: 118 [2021-03-10 22:05:27,730 INFO L226 Difference]: Without dead ends: 118 [2021-03-10 22:05:27,730 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 189.2ms TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:05:27,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-03-10 22:05:27,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 99. [2021-03-10 22:05:27,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.193877551020408) internal successors, (215), 98 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) [2021-03-10 22:05:27,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 215 transitions. [2021-03-10 22:05:27,731 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 215 transitions. Word has length 17 [2021-03-10 22:05:27,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:27,731 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 215 transitions. [2021-03-10 22:05:27,731 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:27,731 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 215 transitions. [2021-03-10 22:05:27,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 22:05:27,731 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:27,731 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:27,931 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4573 [2021-03-10 22:05:27,932 INFO L428 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:27,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:27,932 INFO L82 PathProgramCache]: Analyzing trace with hash -1647333498, now seen corresponding path program 100 times [2021-03-10 22:05:27,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:27,932 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210017609] [2021-03-10 22:05:27,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:27,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:27,997 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:27,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210017609] [2021-03-10 22:05:27,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98317445] [2021-03-10 22:05:27,997 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:28,038 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:05:28,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:28,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 22:05:28,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:28,166 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:28,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:28,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:05:28,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902218969] [2021-03-10 22:05:28,167 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:05:28,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:28,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:05:28,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:05:28,167 INFO L87 Difference]: Start difference. First operand 99 states and 215 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:28,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:28,308 INFO L93 Difference]: Finished difference Result 114 states and 240 transitions. [2021-03-10 22:05:28,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:05:28,308 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 22:05:28,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:28,308 INFO L225 Difference]: With dead ends: 114 [2021-03-10 22:05:28,308 INFO L226 Difference]: Without dead ends: 108 [2021-03-10 22:05:28,308 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 187.8ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:05:28,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-03-10 22:05:28,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 99. [2021-03-10 22:05:28,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.183673469387755) internal successors, (214), 98 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:28,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 214 transitions. [2021-03-10 22:05:28,309 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 214 transitions. Word has length 17 [2021-03-10 22:05:28,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:28,309 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 214 transitions. [2021-03-10 22:05:28,310 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:28,310 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 214 transitions. [2021-03-10 22:05:28,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 22:05:28,310 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:28,310 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:28,510 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4595 [2021-03-10 22:05:28,510 INFO L428 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:28,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:28,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1289973256, now seen corresponding path program 101 times [2021-03-10 22:05:28,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:28,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307057477] [2021-03-10 22:05:28,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:28,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:28,583 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:28,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307057477] [2021-03-10 22:05:28,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947274650] [2021-03-10 22:05:28,583 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:28,624 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:05:28,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:28,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 22:05:28,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:28,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:28,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:28,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:05:28,759 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:28,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:28,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:05:28,762 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:28,780 INFO L628 ElimStorePlain]: treesize reduction 25, result has 41.9 percent of original size [2021-03-10 22:05:28,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:05:28,783 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:28,787 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:28,788 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:05:28,788 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:71, output treesize:6 [2021-03-10 22:05:28,793 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:28,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:28,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:05:28,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306082616] [2021-03-10 22:05:28,793 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:05:28,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:28,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:05:28,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:05:28,793 INFO L87 Difference]: Start difference. First operand 99 states and 214 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:28,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:28,920 INFO L93 Difference]: Finished difference Result 111 states and 238 transitions. [2021-03-10 22:05:28,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:05:28,920 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 22:05:28,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:28,921 INFO L225 Difference]: With dead ends: 111 [2021-03-10 22:05:28,921 INFO L226 Difference]: Without dead ends: 111 [2021-03-10 22:05:28,921 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 182.7ms TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:05:28,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-03-10 22:05:28,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 99. [2021-03-10 22:05:28,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.183673469387755) internal successors, (214), 98 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:28,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 214 transitions. [2021-03-10 22:05:28,922 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 214 transitions. Word has length 17 [2021-03-10 22:05:28,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:28,922 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 214 transitions. [2021-03-10 22:05:28,922 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:28,922 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 214 transitions. [2021-03-10 22:05:28,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 22:05:28,922 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:28,922 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:29,131 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4615 [2021-03-10 22:05:29,131 INFO L428 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:29,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:29,131 INFO L82 PathProgramCache]: Analyzing trace with hash -95204490, now seen corresponding path program 102 times [2021-03-10 22:05:29,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:29,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396024223] [2021-03-10 22:05:29,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:29,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:29,220 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:29,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396024223] [2021-03-10 22:05:29,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447170873] [2021-03-10 22:05:29,220 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:29,262 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:05:29,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:29,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 22:05:29,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:29,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:29,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:29,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:05:29,400 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:29,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:29,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:05:29,403 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:29,421 INFO L628 ElimStorePlain]: treesize reduction 25, result has 41.9 percent of original size [2021-03-10 22:05:29,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:05:29,423 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:29,428 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:29,429 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:05:29,430 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:71, output treesize:6 [2021-03-10 22:05:29,435 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:29,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:29,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:05:29,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736530703] [2021-03-10 22:05:29,435 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:05:29,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:29,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:05:29,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:05:29,435 INFO L87 Difference]: Start difference. First operand 99 states and 214 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:29,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:29,604 INFO L93 Difference]: Finished difference Result 123 states and 262 transitions. [2021-03-10 22:05:29,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:05:29,605 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 22:05:29,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:29,605 INFO L225 Difference]: With dead ends: 123 [2021-03-10 22:05:29,605 INFO L226 Difference]: Without dead ends: 123 [2021-03-10 22:05:29,605 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 227.0ms TimeCoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:05:29,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-03-10 22:05:29,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 99. [2021-03-10 22:05:29,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.183673469387755) internal successors, (214), 98 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:29,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 214 transitions. [2021-03-10 22:05:29,606 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 214 transitions. Word has length 17 [2021-03-10 22:05:29,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:29,606 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 214 transitions. [2021-03-10 22:05:29,606 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:29,607 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 214 transitions. [2021-03-10 22:05:29,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 22:05:29,607 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:29,607 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:29,820 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4640 [2021-03-10 22:05:29,820 INFO L428 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:29,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:29,820 INFO L82 PathProgramCache]: Analyzing trace with hash -1109718968, now seen corresponding path program 103 times [2021-03-10 22:05:29,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:29,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885835150] [2021-03-10 22:05:29,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:29,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:29,892 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:29,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885835150] [2021-03-10 22:05:29,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117511844] [2021-03-10 22:05:29,892 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 22:05:29,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:29,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 22:05:29,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:30,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:05:30,152 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:30,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:05:30,169 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:30,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:30,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:30,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:05:30,174 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:30,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:30,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:05:30,177 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:30,215 INFO L628 ElimStorePlain]: treesize reduction 64, result has 34.0 percent of original size [2021-03-10 22:05:30,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:05:30,218 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:30,243 INFO L628 ElimStorePlain]: treesize reduction 1, result has 96.6 percent of original size [2021-03-10 22:05:30,243 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:05:30,243 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:140, output treesize:12 [2021-03-10 22:05:30,267 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:30,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:30,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:05:30,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058886583] [2021-03-10 22:05:30,267 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:05:30,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:30,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:05:30,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:05:30,267 INFO L87 Difference]: Start difference. First operand 99 states and 214 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:30,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:30,447 INFO L93 Difference]: Finished difference Result 126 states and 267 transitions. [2021-03-10 22:05:30,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:05:30,447 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 22:05:30,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:30,448 INFO L225 Difference]: With dead ends: 126 [2021-03-10 22:05:30,448 INFO L226 Difference]: Without dead ends: 126 [2021-03-10 22:05:30,448 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 243.8ms TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:05:30,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-03-10 22:05:30,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 99. [2021-03-10 22:05:30,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.183673469387755) internal successors, (214), 98 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:30,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 214 transitions. [2021-03-10 22:05:30,452 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 214 transitions. Word has length 17 [2021-03-10 22:05:30,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:30,452 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 214 transitions. [2021-03-10 22:05:30,452 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:30,452 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 214 transitions. [2021-03-10 22:05:30,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 22:05:30,452 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:30,452 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:30,666 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4664,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:30,666 INFO L428 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:30,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:30,666 INFO L82 PathProgramCache]: Analyzing trace with hash 945031308, now seen corresponding path program 104 times [2021-03-10 22:05:30,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:30,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144210508] [2021-03-10 22:05:30,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:30,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:30,736 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:30,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144210508] [2021-03-10 22:05:30,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434335787] [2021-03-10 22:05:30,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:30,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:05:30,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:30,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 22:05:30,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:30,949 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:05:30,950 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:30,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:30,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:30,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:05:30,953 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:30,955 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:05:30,956 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:30,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:30,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:05:30,959 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:30,971 INFO L628 ElimStorePlain]: treesize reduction 4, result has 81.8 percent of original size [2021-03-10 22:05:30,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:05:30,973 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:30,977 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:30,978 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:05:30,978 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:114, output treesize:6 [2021-03-10 22:05:30,983 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:30,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:30,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:05:30,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417761363] [2021-03-10 22:05:30,983 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:05:30,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:30,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:05:30,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:05:30,984 INFO L87 Difference]: Start difference. First operand 99 states and 214 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:31,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:31,104 INFO L93 Difference]: Finished difference Result 118 states and 251 transitions. [2021-03-10 22:05:31,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:05:31,104 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 22:05:31,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:31,104 INFO L225 Difference]: With dead ends: 118 [2021-03-10 22:05:31,104 INFO L226 Difference]: Without dead ends: 118 [2021-03-10 22:05:31,105 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 171.3ms TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:05:31,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-03-10 22:05:31,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 99. [2021-03-10 22:05:31,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.183673469387755) internal successors, (214), 98 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:31,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 214 transitions. [2021-03-10 22:05:31,106 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 214 transitions. Word has length 17 [2021-03-10 22:05:31,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:31,106 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 214 transitions. [2021-03-10 22:05:31,106 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:31,106 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 214 transitions. [2021-03-10 22:05:31,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 22:05:31,106 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:31,106 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:31,319 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4713 [2021-03-10 22:05:31,319 INFO L428 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:31,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:31,319 INFO L82 PathProgramCache]: Analyzing trace with hash 1935386851, now seen corresponding path program 105 times [2021-03-10 22:05:31,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:31,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310507134] [2021-03-10 22:05:31,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:31,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:31,390 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:31,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310507134] [2021-03-10 22:05:31,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108788526] [2021-03-10 22:05:31,390 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:31,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:05:31,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:31,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 22:05:31,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:31,604 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:31,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:31,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:05:31,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759404854] [2021-03-10 22:05:31,605 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:05:31,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:31,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:05:31,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:05:31,605 INFO L87 Difference]: Start difference. First operand 99 states and 214 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:31,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:31,748 INFO L93 Difference]: Finished difference Result 111 states and 233 transitions. [2021-03-10 22:05:31,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:05:31,748 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 22:05:31,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:31,748 INFO L225 Difference]: With dead ends: 111 [2021-03-10 22:05:31,748 INFO L226 Difference]: Without dead ends: 105 [2021-03-10 22:05:31,748 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 226.7ms TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:05:31,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-03-10 22:05:31,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 99. [2021-03-10 22:05:31,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.173469387755102) internal successors, (213), 98 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:31,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 213 transitions. [2021-03-10 22:05:31,749 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 213 transitions. Word has length 17 [2021-03-10 22:05:31,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:31,749 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 213 transitions. [2021-03-10 22:05:31,749 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:31,749 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 213 transitions. [2021-03-10 22:05:31,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 22:05:31,750 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:31,750 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:31,959 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4754,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:31,959 INFO L428 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:31,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:31,959 INFO L82 PathProgramCache]: Analyzing trace with hash -69483170, now seen corresponding path program 106 times [2021-03-10 22:05:31,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:31,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564619283] [2021-03-10 22:05:31,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:31,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:32,027 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:32,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564619283] [2021-03-10 22:05:32,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241396549] [2021-03-10 22:05:32,027 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:32,068 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:05:32,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:32,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 22:05:32,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:32,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:32,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:32,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:05:32,234 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:32,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:05:32,237 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:32,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:32,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:32,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:05:32,241 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:32,243 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:05:32,243 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:32,278 INFO L628 ElimStorePlain]: treesize reduction 41, result has 44.6 percent of original size [2021-03-10 22:05:32,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:05:32,281 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:32,305 INFO L628 ElimStorePlain]: treesize reduction 1, result has 96.6 percent of original size [2021-03-10 22:05:32,306 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:05:32,306 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:128, output treesize:12 [2021-03-10 22:05:32,329 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:32,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:32,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:05:32,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450455955] [2021-03-10 22:05:32,329 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:05:32,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:32,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:05:32,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:05:32,329 INFO L87 Difference]: Start difference. First operand 99 states and 213 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:32,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:32,500 INFO L93 Difference]: Finished difference Result 128 states and 271 transitions. [2021-03-10 22:05:32,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:05:32,501 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 22:05:32,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:32,501 INFO L225 Difference]: With dead ends: 128 [2021-03-10 22:05:32,501 INFO L226 Difference]: Without dead ends: 128 [2021-03-10 22:05:32,501 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 211.5ms TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:05:32,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-03-10 22:05:32,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 100. [2021-03-10 22:05:32,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.1717171717171717) internal successors, (215), 99 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) [2021-03-10 22:05:32,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 215 transitions. [2021-03-10 22:05:32,502 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 215 transitions. Word has length 17 [2021-03-10 22:05:32,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:32,502 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 215 transitions. [2021-03-10 22:05:32,502 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:32,503 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 215 transitions. [2021-03-10 22:05:32,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 22:05:32,503 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:32,503 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:32,703 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4773,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:32,703 INFO L428 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:32,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:32,703 INFO L82 PathProgramCache]: Analyzing trace with hash -516820893, now seen corresponding path program 107 times [2021-03-10 22:05:32,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:32,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667306624] [2021-03-10 22:05:32,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:32,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:32,772 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:32,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667306624] [2021-03-10 22:05:32,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768617757] [2021-03-10 22:05:32,772 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:32,816 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:05:32,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:32,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 22:05:32,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:32,987 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:32,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:32,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:05:32,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307303059] [2021-03-10 22:05:32,988 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:05:32,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:32,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:05:32,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:05:32,988 INFO L87 Difference]: Start difference. First operand 100 states and 215 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:33,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:33,106 INFO L93 Difference]: Finished difference Result 110 states and 236 transitions. [2021-03-10 22:05:33,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:05:33,106 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 22:05:33,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:33,107 INFO L225 Difference]: With dead ends: 110 [2021-03-10 22:05:33,107 INFO L226 Difference]: Without dead ends: 110 [2021-03-10 22:05:33,107 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 169.2ms TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:05:33,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-03-10 22:05:33,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 98. [2021-03-10 22:05:33,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.1752577319587627) internal successors, (211), 97 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:33,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 211 transitions. [2021-03-10 22:05:33,108 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 211 transitions. Word has length 17 [2021-03-10 22:05:33,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:33,108 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 211 transitions. [2021-03-10 22:05:33,108 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:33,108 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 211 transitions. [2021-03-10 22:05:33,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 22:05:33,108 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:33,108 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:33,308 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4819 [2021-03-10 22:05:33,309 INFO L428 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:33,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:33,309 INFO L82 PathProgramCache]: Analyzing trace with hash 518262152, now seen corresponding path program 108 times [2021-03-10 22:05:33,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:33,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21194817] [2021-03-10 22:05:33,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:33,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:33,374 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:33,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21194817] [2021-03-10 22:05:33,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988151303] [2021-03-10 22:05:33,374 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:33,416 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:05:33,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:33,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 22:05:33,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:33,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:33,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:33,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:05:33,579 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:33,582 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:05:33,583 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:33,672 INFO L628 ElimStorePlain]: treesize reduction 87, result has 48.2 percent of original size [2021-03-10 22:05:33,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:05:33,676 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:33,708 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:33,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:05:33,712 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:33,743 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:33,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:05:33,747 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:33,776 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:33,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:05:33,780 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:33,808 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:33,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:05:33,812 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:33,839 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:33,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:05:33,842 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:33,868 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:33,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:05:33,871 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:33,896 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:33,897 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:05:33,897 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:199, output treesize:13 [2021-03-10 22:05:33,930 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:33,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:33,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:05:33,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254231879] [2021-03-10 22:05:33,930 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:05:33,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:33,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:05:33,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:05:33,931 INFO L87 Difference]: Start difference. First operand 98 states and 211 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:34,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:34,108 INFO L93 Difference]: Finished difference Result 123 states and 253 transitions. [2021-03-10 22:05:34,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:05:34,109 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 22:05:34,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:34,109 INFO L225 Difference]: With dead ends: 123 [2021-03-10 22:05:34,109 INFO L226 Difference]: Without dead ends: 123 [2021-03-10 22:05:34,109 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 243.1ms TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:05:34,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-03-10 22:05:34,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 99. [2021-03-10 22:05:34,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.183673469387755) internal successors, (214), 98 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:34,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 214 transitions. [2021-03-10 22:05:34,110 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 214 transitions. Word has length 17 [2021-03-10 22:05:34,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:34,110 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 214 transitions. [2021-03-10 22:05:34,110 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:34,111 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 214 transitions. [2021-03-10 22:05:34,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 22:05:34,111 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:34,111 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:34,311 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4859,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:34,311 INFO L428 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:34,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:34,312 INFO L82 PathProgramCache]: Analyzing trace with hash -464305373, now seen corresponding path program 109 times [2021-03-10 22:05:34,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:34,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305838362] [2021-03-10 22:05:34,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:34,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:34,390 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:34,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305838362] [2021-03-10 22:05:34,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907152415] [2021-03-10 22:05:34,390 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:34,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:34,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 22:05:34,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:34,557 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:34,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:34,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:05:34,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961432673] [2021-03-10 22:05:34,557 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:05:34,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:34,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:05:34,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:05:34,558 INFO L87 Difference]: Start difference. First operand 99 states and 214 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:34,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:34,708 INFO L93 Difference]: Finished difference Result 120 states and 256 transitions. [2021-03-10 22:05:34,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:05:34,708 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 22:05:34,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:34,708 INFO L225 Difference]: With dead ends: 120 [2021-03-10 22:05:34,709 INFO L226 Difference]: Without dead ends: 120 [2021-03-10 22:05:34,709 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 170.7ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:05:34,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-03-10 22:05:34,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 99. [2021-03-10 22:05:34,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.183673469387755) internal successors, (214), 98 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:34,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 214 transitions. [2021-03-10 22:05:34,710 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 214 transitions. Word has length 17 [2021-03-10 22:05:34,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:34,710 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 214 transitions. [2021-03-10 22:05:34,710 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:34,710 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 214 transitions. [2021-03-10 22:05:34,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 22:05:34,710 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:34,710 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:34,911 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4882 [2021-03-10 22:05:34,911 INFO L428 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:34,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:34,911 INFO L82 PathProgramCache]: Analyzing trace with hash -829025908, now seen corresponding path program 110 times [2021-03-10 22:05:34,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:34,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317125110] [2021-03-10 22:05:34,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:34,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:34,978 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:34,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317125110] [2021-03-10 22:05:34,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130023328] [2021-03-10 22:05:34,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:35,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:05:35,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:35,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 22:05:35,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:35,226 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:35,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:35,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:05:35,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341054539] [2021-03-10 22:05:35,226 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:05:35,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:35,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:05:35,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:05:35,227 INFO L87 Difference]: Start difference. First operand 99 states and 214 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:35,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:35,412 INFO L93 Difference]: Finished difference Result 109 states and 230 transitions. [2021-03-10 22:05:35,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:05:35,412 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 22:05:35,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:35,412 INFO L225 Difference]: With dead ends: 109 [2021-03-10 22:05:35,412 INFO L226 Difference]: Without dead ends: 105 [2021-03-10 22:05:35,412 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 264.2ms TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:05:35,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-03-10 22:05:35,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 97. [2021-03-10 22:05:35,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.1770833333333335) internal successors, (209), 96 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:35,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 209 transitions. [2021-03-10 22:05:35,413 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 209 transitions. Word has length 17 [2021-03-10 22:05:35,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:35,414 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 209 transitions. [2021-03-10 22:05:35,414 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:35,414 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 209 transitions. [2021-03-10 22:05:35,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 22:05:35,414 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:35,414 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:35,614 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4899,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:35,614 INFO L428 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:35,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:35,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1167397322, now seen corresponding path program 111 times [2021-03-10 22:05:35,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:35,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187062254] [2021-03-10 22:05:35,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:35,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:35,683 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:35,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187062254] [2021-03-10 22:05:35,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889365725] [2021-03-10 22:05:35,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:35,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 22:05:35,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:35,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 22:05:35,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:35,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:35,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:35,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:05:35,893 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:35,895 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:05:35,895 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:35,897 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:05:35,898 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:35,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:35,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:05:35,901 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:35,912 INFO L628 ElimStorePlain]: treesize reduction 4, result has 81.8 percent of original size [2021-03-10 22:05:35,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:05:35,915 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:35,919 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:35,920 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:05:35,920 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:114, output treesize:6 [2021-03-10 22:05:35,925 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:35,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:35,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:05:35,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346038272] [2021-03-10 22:05:35,925 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:05:35,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:35,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:05:35,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:05:35,926 INFO L87 Difference]: Start difference. First operand 97 states and 209 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:36,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:36,057 INFO L93 Difference]: Finished difference Result 113 states and 241 transitions. [2021-03-10 22:05:36,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:05:36,057 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 22:05:36,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:36,058 INFO L225 Difference]: With dead ends: 113 [2021-03-10 22:05:36,058 INFO L226 Difference]: Without dead ends: 113 [2021-03-10 22:05:36,058 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 169.4ms TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:05:36,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-03-10 22:05:36,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 97. [2021-03-10 22:05:36,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.1770833333333335) internal successors, (209), 96 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:36,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 209 transitions. [2021-03-10 22:05:36,059 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 209 transitions. Word has length 17 [2021-03-10 22:05:36,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:36,059 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 209 transitions. [2021-03-10 22:05:36,059 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:36,059 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 209 transitions. [2021-03-10 22:05:36,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 22:05:36,059 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:36,059 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:36,259 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4927 [2021-03-10 22:05:36,260 INFO L428 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:36,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:36,260 INFO L82 PathProgramCache]: Analyzing trace with hash -483191412, now seen corresponding path program 112 times [2021-03-10 22:05:36,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:36,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974222625] [2021-03-10 22:05:36,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:36,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:36,334 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:36,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974222625] [2021-03-10 22:05:36,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915304223] [2021-03-10 22:05:36,334 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:36,377 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:05:36,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:36,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 22:05:36,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:36,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:36,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:36,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:05:36,544 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:36,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:05:36,546 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:36,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:36,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:36,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:05:36,552 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:36,553 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:05:36,554 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:36,589 INFO L628 ElimStorePlain]: treesize reduction 41, result has 44.6 percent of original size [2021-03-10 22:05:36,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:05:36,592 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:36,617 INFO L628 ElimStorePlain]: treesize reduction 1, result has 96.6 percent of original size [2021-03-10 22:05:36,617 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:05:36,617 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:128, output treesize:12 [2021-03-10 22:05:36,639 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:36,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:36,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:05:36,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083983011] [2021-03-10 22:05:36,639 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:05:36,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:36,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:05:36,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:05:36,639 INFO L87 Difference]: Start difference. First operand 97 states and 209 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:36,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:36,754 INFO L93 Difference]: Finished difference Result 128 states and 272 transitions. [2021-03-10 22:05:36,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:05:36,758 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 22:05:36,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:36,758 INFO L225 Difference]: With dead ends: 128 [2021-03-10 22:05:36,758 INFO L226 Difference]: Without dead ends: 128 [2021-03-10 22:05:36,758 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 161.2ms TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:05:36,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-03-10 22:05:36,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 97. [2021-03-10 22:05:36,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.1770833333333335) internal successors, (209), 96 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:36,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 209 transitions. [2021-03-10 22:05:36,759 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 209 transitions. Word has length 17 [2021-03-10 22:05:36,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:36,759 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 209 transitions. [2021-03-10 22:05:36,759 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:36,759 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 209 transitions. [2021-03-10 22:05:36,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 22:05:36,760 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:36,760 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:36,960 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4964,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:36,960 INFO L428 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:36,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:36,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1665717773, now seen corresponding path program 113 times [2021-03-10 22:05:36,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:36,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52632064] [2021-03-10 22:05:36,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:36,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:37,028 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:37,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52632064] [2021-03-10 22:05:37,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950557427] [2021-03-10 22:05:37,029 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:37,080 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 22:05:37,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:37,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 22:05:37,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:37,265 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:37,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:37,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:05:37,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230558418] [2021-03-10 22:05:37,266 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:05:37,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:37,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:05:37,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:05:37,266 INFO L87 Difference]: Start difference. First operand 97 states and 209 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:37,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:37,375 INFO L93 Difference]: Finished difference Result 105 states and 225 transitions. [2021-03-10 22:05:37,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:05:37,375 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 22:05:37,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:37,376 INFO L225 Difference]: With dead ends: 105 [2021-03-10 22:05:37,376 INFO L226 Difference]: Without dead ends: 105 [2021-03-10 22:05:37,376 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 179.9ms TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:05:37,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-03-10 22:05:37,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 95. [2021-03-10 22:05:37,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.1808510638297873) internal successors, (205), 94 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:37,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 205 transitions. [2021-03-10 22:05:37,377 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 205 transitions. Word has length 17 [2021-03-10 22:05:37,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:37,377 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 205 transitions. [2021-03-10 22:05:37,377 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:37,377 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 205 transitions. [2021-03-10 22:05:37,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 22:05:37,377 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:37,377 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:37,594 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5008,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:37,594 INFO L428 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:37,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:37,595 INFO L82 PathProgramCache]: Analyzing trace with hash -1594166478, now seen corresponding path program 114 times [2021-03-10 22:05:37,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:37,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837239312] [2021-03-10 22:05:37,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:37,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:37,668 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:37,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837239312] [2021-03-10 22:05:37,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387051764] [2021-03-10 22:05:37,668 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:37,712 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 22:05:37,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:37,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 22:05:37,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:37,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:05:37,860 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:37,863 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:05:37,864 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:37,929 INFO L628 ElimStorePlain]: treesize reduction 51, result has 52.8 percent of original size [2021-03-10 22:05:37,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:05:37,933 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:37,956 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:37,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:05:37,959 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:37,986 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:37,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:05:37,989 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:38,008 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:38,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:05:38,011 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:38,030 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:38,031 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 5 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:05:38,031 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:140, output treesize:13 [2021-03-10 22:05:38,061 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:38,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:38,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:05:38,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736627363] [2021-03-10 22:05:38,061 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:05:38,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:38,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:05:38,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:05:38,061 INFO L87 Difference]: Start difference. First operand 95 states and 205 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:38,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:38,236 INFO L93 Difference]: Finished difference Result 112 states and 236 transitions. [2021-03-10 22:05:38,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:05:38,237 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 22:05:38,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:38,237 INFO L225 Difference]: With dead ends: 112 [2021-03-10 22:05:38,237 INFO L226 Difference]: Without dead ends: 108 [2021-03-10 22:05:38,237 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 249.5ms TimeCoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:05:38,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-03-10 22:05:38,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 94. [2021-03-10 22:05:38,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.172043010752688) internal successors, (202), 93 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:38,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 202 transitions. [2021-03-10 22:05:38,238 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 202 transitions. Word has length 17 [2021-03-10 22:05:38,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:38,238 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 202 transitions. [2021-03-10 22:05:38,238 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:38,238 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 202 transitions. [2021-03-10 22:05:38,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 22:05:38,238 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:38,238 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:38,439 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5037,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:38,439 INFO L428 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:38,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:38,439 INFO L82 PathProgramCache]: Analyzing trace with hash -1562219525, now seen corresponding path program 115 times [2021-03-10 22:05:38,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:38,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303595821] [2021-03-10 22:05:38,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:38,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:38,503 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:38,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303595821] [2021-03-10 22:05:38,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866293148] [2021-03-10 22:05:38,503 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:38,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:38,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 22:05:38,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:38,713 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:38,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:38,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:05:38,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162685033] [2021-03-10 22:05:38,713 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:05:38,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:38,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:05:38,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:05:38,713 INFO L87 Difference]: Start difference. First operand 94 states and 202 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:38,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:38,925 INFO L93 Difference]: Finished difference Result 137 states and 278 transitions. [2021-03-10 22:05:38,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:05:38,925 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 22:05:38,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:38,925 INFO L225 Difference]: With dead ends: 137 [2021-03-10 22:05:38,925 INFO L226 Difference]: Without dead ends: 134 [2021-03-10 22:05:38,926 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 237.2ms TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:05:38,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-03-10 22:05:38,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 101. [2021-03-10 22:05:38,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.18) internal successors, (218), 100 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:38,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 218 transitions. [2021-03-10 22:05:38,927 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 218 transitions. Word has length 17 [2021-03-10 22:05:38,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:38,927 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 218 transitions. [2021-03-10 22:05:38,927 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:38,927 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 218 transitions. [2021-03-10 22:05:38,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 22:05:38,927 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:38,927 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:39,139 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5060 [2021-03-10 22:05:39,139 INFO L428 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:39,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:39,139 INFO L82 PathProgramCache]: Analyzing trace with hash -2041504201, now seen corresponding path program 116 times [2021-03-10 22:05:39,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:39,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390208516] [2021-03-10 22:05:39,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:39,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:39,205 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:39,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390208516] [2021-03-10 22:05:39,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624196] [2021-03-10 22:05:39,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:39,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:05:39,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:39,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 22:05:39,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:39,450 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:39,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:39,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:05:39,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047733166] [2021-03-10 22:05:39,450 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:05:39,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:39,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:05:39,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:05:39,451 INFO L87 Difference]: Start difference. First operand 101 states and 218 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:39,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:39,643 INFO L93 Difference]: Finished difference Result 135 states and 278 transitions. [2021-03-10 22:05:39,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:05:39,643 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 22:05:39,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:39,644 INFO L225 Difference]: With dead ends: 135 [2021-03-10 22:05:39,644 INFO L226 Difference]: Without dead ends: 135 [2021-03-10 22:05:39,644 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 227.0ms TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:05:39,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-03-10 22:05:39,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 100. [2021-03-10 22:05:39,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.1818181818181817) internal successors, (216), 99 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:39,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 216 transitions. [2021-03-10 22:05:39,645 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 216 transitions. Word has length 17 [2021-03-10 22:05:39,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:39,645 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 216 transitions. [2021-03-10 22:05:39,645 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:39,645 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 216 transitions. [2021-03-10 22:05:39,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 22:05:39,645 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:39,645 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:39,845 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5089,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:39,846 INFO L428 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:39,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:39,846 INFO L82 PathProgramCache]: Analyzing trace with hash 1718233293, now seen corresponding path program 117 times [2021-03-10 22:05:39,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:39,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207355527] [2021-03-10 22:05:39,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:39,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:39,925 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:39,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207355527] [2021-03-10 22:05:39,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909066548] [2021-03-10 22:05:39,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:39,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 22:05:39,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:39,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 22:05:39,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:40,127 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:40,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:40,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:05:40,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849572738] [2021-03-10 22:05:40,127 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:05:40,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:40,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:05:40,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:05:40,128 INFO L87 Difference]: Start difference. First operand 100 states and 216 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:40,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:40,262 INFO L93 Difference]: Finished difference Result 114 states and 243 transitions. [2021-03-10 22:05:40,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:05:40,262 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 22:05:40,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:40,262 INFO L225 Difference]: With dead ends: 114 [2021-03-10 22:05:40,262 INFO L226 Difference]: Without dead ends: 114 [2021-03-10 22:05:40,263 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 177.3ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:05:40,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-03-10 22:05:40,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 95. [2021-03-10 22:05:40,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.1702127659574466) internal successors, (204), 94 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:40,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 204 transitions. [2021-03-10 22:05:40,264 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 204 transitions. Word has length 17 [2021-03-10 22:05:40,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:40,264 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 204 transitions. [2021-03-10 22:05:40,264 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:40,264 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 204 transitions. [2021-03-10 22:05:40,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 22:05:40,264 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:40,264 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:40,464 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5131 [2021-03-10 22:05:40,464 INFO L428 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:40,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:40,465 INFO L82 PathProgramCache]: Analyzing trace with hash -553930680, now seen corresponding path program 118 times [2021-03-10 22:05:40,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:40,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553823914] [2021-03-10 22:05:40,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:40,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:40,527 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:40,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553823914] [2021-03-10 22:05:40,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104916286] [2021-03-10 22:05:40,528 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:40,571 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:05:40,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:40,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 22:05:40,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:40,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:05:40,758 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:40,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:40,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:05:40,763 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:40,833 INFO L628 ElimStorePlain]: treesize reduction 63, result has 45.7 percent of original size [2021-03-10 22:05:40,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:05:40,836 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:40,858 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:40,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:05:40,861 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:40,880 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:40,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:05:40,883 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:40,902 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:40,903 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:05:40,903 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 7 variables, input treesize:128, output treesize:13 [2021-03-10 22:05:40,933 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:40,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:40,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:05:40,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331316314] [2021-03-10 22:05:40,933 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:05:40,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:40,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:05:40,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:05:40,934 INFO L87 Difference]: Start difference. First operand 95 states and 204 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:41,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:41,178 INFO L93 Difference]: Finished difference Result 128 states and 260 transitions. [2021-03-10 22:05:41,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:05:41,178 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 22:05:41,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:41,179 INFO L225 Difference]: With dead ends: 128 [2021-03-10 22:05:41,179 INFO L226 Difference]: Without dead ends: 128 [2021-03-10 22:05:41,179 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 318.1ms TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:05:41,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-03-10 22:05:41,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 97. [2021-03-10 22:05:41,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.1875) internal successors, (210), 96 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) [2021-03-10 22:05:41,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 210 transitions. [2021-03-10 22:05:41,180 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 210 transitions. Word has length 17 [2021-03-10 22:05:41,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:41,180 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 210 transitions. [2021-03-10 22:05:41,180 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:41,180 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 210 transitions. [2021-03-10 22:05:41,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 22:05:41,180 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:41,180 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:41,381 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5159 [2021-03-10 22:05:41,381 INFO L428 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:41,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:41,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1536498205, now seen corresponding path program 119 times [2021-03-10 22:05:41,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:41,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066121824] [2021-03-10 22:05:41,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:41,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:41,484 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:41,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066121824] [2021-03-10 22:05:41,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838492401] [2021-03-10 22:05:41,485 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:41,539 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:05:41,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:41,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 22:05:41,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:41,677 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:41,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:41,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:05:41,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103680208] [2021-03-10 22:05:41,678 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:05:41,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:41,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:05:41,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:05:41,679 INFO L87 Difference]: Start difference. First operand 97 states and 210 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:41,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:41,869 INFO L93 Difference]: Finished difference Result 116 states and 246 transitions. [2021-03-10 22:05:41,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:05:41,869 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 22:05:41,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:41,869 INFO L225 Difference]: With dead ends: 116 [2021-03-10 22:05:41,869 INFO L226 Difference]: Without dead ends: 116 [2021-03-10 22:05:41,869 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 252.5ms TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:05:41,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-03-10 22:05:41,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 99. [2021-03-10 22:05:41,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.204081632653061) internal successors, (216), 98 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:41,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 216 transitions. [2021-03-10 22:05:41,871 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 216 transitions. Word has length 17 [2021-03-10 22:05:41,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:41,871 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 216 transitions. [2021-03-10 22:05:41,871 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:41,871 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 216 transitions. [2021-03-10 22:05:41,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 22:05:41,871 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:41,871 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:42,075 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5183 [2021-03-10 22:05:42,075 INFO L428 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:42,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:42,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1901218740, now seen corresponding path program 120 times [2021-03-10 22:05:42,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:42,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975098688] [2021-03-10 22:05:42,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:42,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:42,132 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:42,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975098688] [2021-03-10 22:05:42,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294106437] [2021-03-10 22:05:42,133 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:42,177 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:05:42,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:42,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 22:05:42,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:42,373 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:42,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:42,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:05:42,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251099500] [2021-03-10 22:05:42,373 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:05:42,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:42,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:05:42,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:05:42,374 INFO L87 Difference]: Start difference. First operand 99 states and 216 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:42,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:42,617 INFO L93 Difference]: Finished difference Result 118 states and 248 transitions. [2021-03-10 22:05:42,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:05:42,617 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 22:05:42,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:42,617 INFO L225 Difference]: With dead ends: 118 [2021-03-10 22:05:42,617 INFO L226 Difference]: Without dead ends: 114 [2021-03-10 22:05:42,617 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 300.1ms TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:05:42,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-03-10 22:05:42,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 98. [2021-03-10 22:05:42,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.195876288659794) internal successors, (213), 97 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:42,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 213 transitions. [2021-03-10 22:05:42,618 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 213 transitions. Word has length 17 [2021-03-10 22:05:42,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:42,618 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 213 transitions. [2021-03-10 22:05:42,619 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:42,619 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 213 transitions. [2021-03-10 22:05:42,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 22:05:42,619 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:42,619 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:42,819 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5203,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:42,819 INFO L428 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:42,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:42,819 INFO L82 PathProgramCache]: Analyzing trace with hash -948752883, now seen corresponding path program 121 times [2021-03-10 22:05:42,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:42,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536005339] [2021-03-10 22:05:42,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:42,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:42,881 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:42,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536005339] [2021-03-10 22:05:42,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742030042] [2021-03-10 22:05:42,881 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:42,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:42,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 22:05:42,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:43,090 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:43,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:43,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:05:43,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525926723] [2021-03-10 22:05:43,090 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:05:43,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:43,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:05:43,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:05:43,091 INFO L87 Difference]: Start difference. First operand 98 states and 213 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:43,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:43,243 INFO L93 Difference]: Finished difference Result 116 states and 246 transitions. [2021-03-10 22:05:43,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:05:43,244 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 22:05:43,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:43,244 INFO L225 Difference]: With dead ends: 116 [2021-03-10 22:05:43,244 INFO L226 Difference]: Without dead ends: 116 [2021-03-10 22:05:43,244 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 180.4ms TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:05:43,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-03-10 22:05:43,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 96. [2021-03-10 22:05:43,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.1789473684210527) internal successors, (207), 95 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:43,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 207 transitions. [2021-03-10 22:05:43,245 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 207 transitions. Word has length 17 [2021-03-10 22:05:43,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:43,245 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 207 transitions. [2021-03-10 22:05:43,245 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:43,246 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 207 transitions. [2021-03-10 22:05:43,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 22:05:43,246 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:43,246 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:43,451 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5221 [2021-03-10 22:05:43,451 INFO L428 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:43,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:43,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1381056024, now seen corresponding path program 122 times [2021-03-10 22:05:43,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:43,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461887951] [2021-03-10 22:05:43,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:43,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:43,512 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:43,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461887951] [2021-03-10 22:05:43,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691248371] [2021-03-10 22:05:43,512 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 22:05:43,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:05:43,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:43,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 22:05:43,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:43,807 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:43,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:43,808 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:05:43,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91085315] [2021-03-10 22:05:43,808 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:05:43,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:43,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:05:43,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:05:43,808 INFO L87 Difference]: Start difference. First operand 96 states and 207 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:44,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:44,042 INFO L93 Difference]: Finished difference Result 108 states and 226 transitions. [2021-03-10 22:05:44,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:05:44,042 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 22:05:44,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:44,043 INFO L225 Difference]: With dead ends: 108 [2021-03-10 22:05:44,043 INFO L226 Difference]: Without dead ends: 102 [2021-03-10 22:05:44,043 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 321.6ms TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:05:44,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-03-10 22:05:44,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 95. [2021-03-10 22:05:44,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.1702127659574466) internal successors, (204), 94 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:44,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 204 transitions. [2021-03-10 22:05:44,044 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 204 transitions. Word has length 17 [2021-03-10 22:05:44,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:44,044 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 204 transitions. [2021-03-10 22:05:44,044 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:44,044 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 204 transitions. [2021-03-10 22:05:44,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 22:05:44,044 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:44,044 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:44,247 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5250,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:44,247 INFO L428 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:44,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:44,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1642480648, now seen corresponding path program 123 times [2021-03-10 22:05:44,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:44,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983955023] [2021-03-10 22:05:44,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:44,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:44,308 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:44,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983955023] [2021-03-10 22:05:44,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128553537] [2021-03-10 22:05:44,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 22:05:44,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 22:05:44,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:44,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 22:05:44,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:44,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:44,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:44,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:05:44,466 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:44,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:44,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:05:44,468 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:44,487 INFO L628 ElimStorePlain]: treesize reduction 25, result has 41.9 percent of original size [2021-03-10 22:05:44,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:05:44,489 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:44,494 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:44,494 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:05:44,494 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:71, output treesize:6 [2021-03-10 22:05:44,500 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:44,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:44,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:05:44,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864127413] [2021-03-10 22:05:44,500 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:05:44,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:44,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:05:44,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:05:44,506 INFO L87 Difference]: Start difference. First operand 95 states and 204 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:44,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:44,660 INFO L93 Difference]: Finished difference Result 123 states and 259 transitions. [2021-03-10 22:05:44,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:05:44,660 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 22:05:44,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:44,661 INFO L225 Difference]: With dead ends: 123 [2021-03-10 22:05:44,661 INFO L226 Difference]: Without dead ends: 123 [2021-03-10 22:05:44,661 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 156.2ms TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:05:44,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-03-10 22:05:44,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 95. [2021-03-10 22:05:44,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.1702127659574466) internal successors, (204), 94 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:44,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 204 transitions. [2021-03-10 22:05:44,662 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 204 transitions. Word has length 17 [2021-03-10 22:05:44,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:44,662 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 204 transitions. [2021-03-10 22:05:44,662 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:44,662 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 204 transitions. [2021-03-10 22:05:44,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 22:05:44,662 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:44,662 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:44,862 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5278 [2021-03-10 22:05:44,863 INFO L428 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:44,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:44,863 INFO L82 PathProgramCache]: Analyzing trace with hash -1662131105, now seen corresponding path program 124 times [2021-03-10 22:05:44,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:44,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338493252] [2021-03-10 22:05:44,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:44,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:44,926 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:44,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338493252] [2021-03-10 22:05:44,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003974877] [2021-03-10 22:05:44,927 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:44,971 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:05:44,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:44,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 22:05:44,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:45,098 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:45,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:45,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:05:45,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907134734] [2021-03-10 22:05:45,098 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:05:45,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:45,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:05:45,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:05:45,099 INFO L87 Difference]: Start difference. First operand 95 states and 204 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:45,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:45,247 INFO L93 Difference]: Finished difference Result 107 states and 222 transitions. [2021-03-10 22:05:45,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:05:45,247 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 22:05:45,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:45,247 INFO L225 Difference]: With dead ends: 107 [2021-03-10 22:05:45,247 INFO L226 Difference]: Without dead ends: 101 [2021-03-10 22:05:45,247 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 203.1ms TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:05:45,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-03-10 22:05:45,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 95. [2021-03-10 22:05:45,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.1595744680851063) internal successors, (203), 94 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:45,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 203 transitions. [2021-03-10 22:05:45,248 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 203 transitions. Word has length 17 [2021-03-10 22:05:45,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:45,248 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 203 transitions. [2021-03-10 22:05:45,249 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:45,249 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 203 transitions. [2021-03-10 22:05:45,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 22:05:45,249 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:45,249 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:45,449 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5303,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:45,449 INFO L428 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:45,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:45,449 INFO L82 PathProgramCache]: Analyzing trace with hash 627966170, now seen corresponding path program 125 times [2021-03-10 22:05:45,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:45,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291605964] [2021-03-10 22:05:45,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:45,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:45,522 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:45,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291605964] [2021-03-10 22:05:45,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193595002] [2021-03-10 22:05:45,523 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:45,572 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 22:05:45,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:45,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 22:05:45,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:45,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:45,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:45,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:05:45,819 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:45,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:45,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:45,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:05:45,823 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:45,826 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:05:45,826 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:45,828 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:05:45,829 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:45,831 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:05:45,832 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:45,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:05:45,835 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:45,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:05:45,838 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:45,839 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:05:45,840 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:45,876 INFO L628 ElimStorePlain]: treesize reduction 25, result has 56.9 percent of original size [2021-03-10 22:05:45,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:05:45,879 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:45,904 INFO L628 ElimStorePlain]: treesize reduction 1, result has 96.6 percent of original size [2021-03-10 22:05:45,905 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:05:45,905 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 3 variables, input treesize:199, output treesize:12 [2021-03-10 22:05:45,927 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:45,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:45,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:05:45,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320100612] [2021-03-10 22:05:45,927 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:05:45,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:45,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:05:45,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:05:45,927 INFO L87 Difference]: Start difference. First operand 95 states and 203 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:46,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:46,106 INFO L93 Difference]: Finished difference Result 141 states and 289 transitions. [2021-03-10 22:05:46,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:05:46,106 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 22:05:46,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:46,107 INFO L225 Difference]: With dead ends: 141 [2021-03-10 22:05:46,107 INFO L226 Difference]: Without dead ends: 141 [2021-03-10 22:05:46,107 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 188.9ms TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:05:46,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-03-10 22:05:46,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 96. [2021-03-10 22:05:46,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.1789473684210527) internal successors, (207), 95 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:46,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 207 transitions. [2021-03-10 22:05:46,108 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 207 transitions. Word has length 17 [2021-03-10 22:05:46,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:46,108 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 207 transitions. [2021-03-10 22:05:46,108 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:46,108 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 207 transitions. [2021-03-10 22:05:46,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 22:05:46,108 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:46,108 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:46,314 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5321 [2021-03-10 22:05:46,314 INFO L428 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:46,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:46,315 INFO L82 PathProgramCache]: Analyzing trace with hash 659913123, now seen corresponding path program 126 times [2021-03-10 22:05:46,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:46,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414129201] [2021-03-10 22:05:46,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:46,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:46,379 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:46,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414129201] [2021-03-10 22:05:46,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994264913] [2021-03-10 22:05:46,380 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:46,425 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:05:46,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:46,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 22:05:46,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:46,571 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:46,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:46,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:05:46,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384089172] [2021-03-10 22:05:46,571 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:05:46,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:46,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:05:46,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:05:46,572 INFO L87 Difference]: Start difference. First operand 96 states and 207 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:46,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:46,794 INFO L93 Difference]: Finished difference Result 130 states and 264 transitions. [2021-03-10 22:05:46,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:05:46,794 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 22:05:46,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:46,795 INFO L225 Difference]: With dead ends: 130 [2021-03-10 22:05:46,795 INFO L226 Difference]: Without dead ends: 127 [2021-03-10 22:05:46,795 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 221.0ms TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:05:46,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-03-10 22:05:46,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 100. [2021-03-10 22:05:46,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.1717171717171717) internal successors, (215), 99 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) [2021-03-10 22:05:46,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 215 transitions. [2021-03-10 22:05:46,796 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 215 transitions. Word has length 17 [2021-03-10 22:05:46,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:46,796 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 215 transitions. [2021-03-10 22:05:46,796 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:46,796 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 215 transitions. [2021-03-10 22:05:46,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 22:05:46,796 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:46,796 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:46,996 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5413,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:46,997 INFO L428 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:46,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:46,997 INFO L82 PathProgramCache]: Analyzing trace with hash 180628447, now seen corresponding path program 127 times [2021-03-10 22:05:46,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:46,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625642202] [2021-03-10 22:05:46,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:47,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:47,062 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:47,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625642202] [2021-03-10 22:05:47,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450246125] [2021-03-10 22:05:47,062 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:47,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:47,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 22:05:47,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:47,243 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:47,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:47,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:05:47,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434412354] [2021-03-10 22:05:47,244 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:05:47,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:47,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:05:47,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:05:47,244 INFO L87 Difference]: Start difference. First operand 100 states and 215 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:47,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:47,394 INFO L93 Difference]: Finished difference Result 111 states and 235 transitions. [2021-03-10 22:05:47,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:05:47,395 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 22:05:47,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:47,395 INFO L225 Difference]: With dead ends: 111 [2021-03-10 22:05:47,395 INFO L226 Difference]: Without dead ends: 111 [2021-03-10 22:05:47,395 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 167.1ms TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:05:47,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-03-10 22:05:47,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 96. [2021-03-10 22:05:47,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.168421052631579) internal successors, (206), 95 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:47,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 206 transitions. [2021-03-10 22:05:47,396 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 206 transitions. Word has length 17 [2021-03-10 22:05:47,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:47,396 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 206 transitions. [2021-03-10 22:05:47,396 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:47,396 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 206 transitions. [2021-03-10 22:05:47,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 22:05:47,397 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:47,397 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:47,597 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5451 [2021-03-10 22:05:47,597 INFO L428 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:47,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:47,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1795033046, now seen corresponding path program 128 times [2021-03-10 22:05:47,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:47,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678981510] [2021-03-10 22:05:47,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:47,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:47,656 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:47,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678981510] [2021-03-10 22:05:47,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294154330] [2021-03-10 22:05:47,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:47,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:05:47,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:47,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 22:05:47,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:47,952 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:05:47,952 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:47,955 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:05:47,955 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:47,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:47,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:47,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:05:47,960 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:47,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:05:47,967 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:47,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:05:47,971 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:47,973 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:05:47,973 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:47,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:05:47,977 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:47,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:47,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:05:47,980 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:48,017 INFO L628 ElimStorePlain]: treesize reduction 44, result has 42.9 percent of original size [2021-03-10 22:05:48,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:05:48,020 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:48,045 INFO L628 ElimStorePlain]: treesize reduction 1, result has 96.6 percent of original size [2021-03-10 22:05:48,046 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:05:48,046 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 3 variables, input treesize:199, output treesize:12 [2021-03-10 22:05:48,068 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:48,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:48,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:05:48,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406353134] [2021-03-10 22:05:48,069 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:05:48,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:48,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:05:48,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:05:48,069 INFO L87 Difference]: Start difference. First operand 96 states and 206 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:48,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:48,214 INFO L93 Difference]: Finished difference Result 118 states and 247 transitions. [2021-03-10 22:05:48,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:05:48,214 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 22:05:48,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:48,214 INFO L225 Difference]: With dead ends: 118 [2021-03-10 22:05:48,214 INFO L226 Difference]: Without dead ends: 116 [2021-03-10 22:05:48,214 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 151.4ms TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:05:48,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-03-10 22:05:48,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 94. [2021-03-10 22:05:48,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.161290322580645) internal successors, (201), 93 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:48,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 201 transitions. [2021-03-10 22:05:48,215 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 201 transitions. Word has length 17 [2021-03-10 22:05:48,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:48,216 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 201 transitions. [2021-03-10 22:05:48,216 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:48,216 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 201 transitions. [2021-03-10 22:05:48,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 22:05:48,216 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:48,216 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:48,427 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5481 [2021-03-10 22:05:48,427 INFO L428 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:48,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:48,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1215711492, now seen corresponding path program 129 times [2021-03-10 22:05:48,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:48,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671876413] [2021-03-10 22:05:48,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:48,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:48,487 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:48,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671876413] [2021-03-10 22:05:48,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702585491] [2021-03-10 22:05:48,488 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:48,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 22:05:48,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:48,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 22:05:48,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:48,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:05:48,668 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:48,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:48,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:05:48,673 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:48,767 INFO L628 ElimStorePlain]: treesize reduction 106, result has 43.3 percent of original size [2021-03-10 22:05:48,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:05:48,771 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:48,803 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:48,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:05:48,807 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:48,838 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:48,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:05:48,842 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:48,872 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:48,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:05:48,876 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:48,905 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:48,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:05:48,908 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:48,935 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:48,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:05:48,939 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:48,965 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:48,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:05:48,968 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:48,993 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:48,994 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:05:48,994 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:199, output treesize:13 [2021-03-10 22:05:49,023 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:49,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:49,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:05:49,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297746222] [2021-03-10 22:05:49,023 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:05:49,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:49,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:05:49,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:05:49,023 INFO L87 Difference]: Start difference. First operand 94 states and 201 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:49,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:49,183 INFO L93 Difference]: Finished difference Result 123 states and 250 transitions. [2021-03-10 22:05:49,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:05:49,183 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 22:05:49,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:49,183 INFO L225 Difference]: With dead ends: 123 [2021-03-10 22:05:49,184 INFO L226 Difference]: Without dead ends: 123 [2021-03-10 22:05:49,184 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 183.0ms TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:05:49,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-03-10 22:05:49,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 94. [2021-03-10 22:05:49,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.161290322580645) internal successors, (201), 93 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:49,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 201 transitions. [2021-03-10 22:05:49,185 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 201 transitions. Word has length 17 [2021-03-10 22:05:49,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:49,185 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 201 transitions. [2021-03-10 22:05:49,185 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:49,185 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 201 transitions. [2021-03-10 22:05:49,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 22:05:49,185 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:49,185 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:49,395 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5570 [2021-03-10 22:05:49,395 INFO L428 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:49,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:49,395 INFO L82 PathProgramCache]: Analyzing trace with hash 768373769, now seen corresponding path program 130 times [2021-03-10 22:05:49,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:49,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849341070] [2021-03-10 22:05:49,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:49,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:49,457 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:49,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849341070] [2021-03-10 22:05:49,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428908107] [2021-03-10 22:05:49,457 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 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 [2021-03-10 22:05:49,503 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:05:49,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:49,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 22:05:49,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:49,834 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:49,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:49,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:05:49,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530076503] [2021-03-10 22:05:49,834 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:05:49,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:49,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:05:49,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:05:49,834 INFO L87 Difference]: Start difference. First operand 94 states and 201 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:50,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:50,080 INFO L93 Difference]: Finished difference Result 150 states and 303 transitions. [2021-03-10 22:05:50,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:05:50,080 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 22:05:50,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:50,081 INFO L225 Difference]: With dead ends: 150 [2021-03-10 22:05:50,081 INFO L226 Difference]: Without dead ends: 150 [2021-03-10 22:05:50,081 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 220.8ms TimeCoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:05:50,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-03-10 22:05:50,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 95. [2021-03-10 22:05:50,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.1914893617021276) internal successors, (206), 94 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:50,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 206 transitions. [2021-03-10 22:05:50,082 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 206 transitions. Word has length 17 [2021-03-10 22:05:50,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:50,082 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 206 transitions. [2021-03-10 22:05:50,082 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:50,082 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 206 transitions. [2021-03-10 22:05:50,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 22:05:50,082 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:50,082 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:50,283 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5591,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:50,283 INFO L428 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:50,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:50,283 INFO L82 PathProgramCache]: Analyzing trace with hash 233143967, now seen corresponding path program 131 times [2021-03-10 22:05:50,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:50,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198363261] [2021-03-10 22:05:50,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:50,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:50,351 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:50,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198363261] [2021-03-10 22:05:50,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376861632] [2021-03-10 22:05:50,351 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:50,397 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 22:05:50,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:50,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 22:05:50,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:50,495 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:50,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:50,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:05:50,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687854714] [2021-03-10 22:05:50,496 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:05:50,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:50,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:05:50,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:05:50,496 INFO L87 Difference]: Start difference. First operand 95 states and 206 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:50,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:50,669 INFO L93 Difference]: Finished difference Result 115 states and 242 transitions. [2021-03-10 22:05:50,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:05:50,669 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 22:05:50,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:50,670 INFO L225 Difference]: With dead ends: 115 [2021-03-10 22:05:50,670 INFO L226 Difference]: Without dead ends: 115 [2021-03-10 22:05:50,670 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 166.6ms TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:05:50,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-03-10 22:05:50,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 93. [2021-03-10 22:05:50,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.1630434782608696) internal successors, (199), 92 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:50,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 199 transitions. [2021-03-10 22:05:50,671 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 199 transitions. Word has length 17 [2021-03-10 22:05:50,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:50,671 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 199 transitions. [2021-03-10 22:05:50,671 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:50,671 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 199 transitions. [2021-03-10 22:05:50,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 22:05:50,671 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:50,671 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:50,871 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5676,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:50,872 INFO L428 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:50,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:50,872 INFO L82 PathProgramCache]: Analyzing trace with hash -131576568, now seen corresponding path program 132 times [2021-03-10 22:05:50,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:50,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896683804] [2021-03-10 22:05:50,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:50,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:50,929 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:50,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896683804] [2021-03-10 22:05:50,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678117655] [2021-03-10 22:05:50,929 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:50,975 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 22:05:50,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:50,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 22:05:50,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:51,141 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:51,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:51,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:05:51,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718378021] [2021-03-10 22:05:51,141 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:05:51,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:51,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:05:51,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:05:51,142 INFO L87 Difference]: Start difference. First operand 93 states and 199 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:51,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:51,312 INFO L93 Difference]: Finished difference Result 103 states and 215 transitions. [2021-03-10 22:05:51,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:05:51,312 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 22:05:51,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:51,312 INFO L225 Difference]: With dead ends: 103 [2021-03-10 22:05:51,312 INFO L226 Difference]: Without dead ends: 99 [2021-03-10 22:05:51,313 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 218.2ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:05:51,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-03-10 22:05:51,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 91. [2021-03-10 22:05:51,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 2.1555555555555554) internal successors, (194), 90 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:51,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 194 transitions. [2021-03-10 22:05:51,313 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 194 transitions. Word has length 17 [2021-03-10 22:05:51,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:51,314 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 194 transitions. [2021-03-10 22:05:51,314 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:51,314 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 194 transitions. [2021-03-10 22:05:51,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 22:05:51,314 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:51,314 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:51,514 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5693 [2021-03-10 22:05:51,514 INFO L428 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:51,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:51,514 INFO L82 PathProgramCache]: Analyzing trace with hash -340299618, now seen corresponding path program 133 times [2021-03-10 22:05:51,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:51,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006545161] [2021-03-10 22:05:51,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:51,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:51,575 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:51,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006545161] [2021-03-10 22:05:51,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354456309] [2021-03-10 22:05:51,575 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:51,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:51,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 22:05:51,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:51,820 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:05:51,821 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:51,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:05:51,825 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:51,917 INFO L628 ElimStorePlain]: treesize reduction 86, result has 48.5 percent of original size [2021-03-10 22:05:51,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:05:51,921 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:51,953 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:51,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:05:51,957 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:51,988 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:51,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:05:51,991 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:52,021 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:52,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:05:52,025 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:52,053 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:52,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:05:52,056 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:52,084 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:52,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:05:52,087 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:52,113 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:52,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:05:52,116 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:52,141 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:52,142 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:05:52,142 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:199, output treesize:13 [2021-03-10 22:05:52,171 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:52,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:52,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:05:52,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655002291] [2021-03-10 22:05:52,172 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:05:52,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:52,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:05:52,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:05:52,172 INFO L87 Difference]: Start difference. First operand 91 states and 194 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:52,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:52,543 INFO L93 Difference]: Finished difference Result 129 states and 255 transitions. [2021-03-10 22:05:52,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:05:52,543 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 22:05:52,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:52,543 INFO L225 Difference]: With dead ends: 129 [2021-03-10 22:05:52,543 INFO L226 Difference]: Without dead ends: 129 [2021-03-10 22:05:52,544 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 436.2ms TimeCoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:05:52,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-03-10 22:05:52,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 88. [2021-03-10 22:05:52,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 2.0919540229885056) internal successors, (182), 87 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:52,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 182 transitions. [2021-03-10 22:05:52,545 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 182 transitions. Word has length 17 [2021-03-10 22:05:52,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:52,545 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 182 transitions. [2021-03-10 22:05:52,545 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:52,545 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 182 transitions. [2021-03-10 22:05:52,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 22:05:52,545 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:52,545 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:52,745 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5717 [2021-03-10 22:05:52,745 INFO L428 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:52,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:52,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1808609567, now seen corresponding path program 134 times [2021-03-10 22:05:52,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:52,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344847596] [2021-03-10 22:05:52,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:52,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:52,804 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:52,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344847596] [2021-03-10 22:05:52,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132152724] [2021-03-10 22:05:52,804 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:52,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:05:52,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:52,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 22:05:52,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:53,066 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:53,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:53,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:05:53,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077528231] [2021-03-10 22:05:53,066 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:05:53,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:53,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:05:53,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:05:53,066 INFO L87 Difference]: Start difference. First operand 88 states and 182 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:53,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:53,293 INFO L93 Difference]: Finished difference Result 133 states and 260 transitions. [2021-03-10 22:05:53,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:05:53,294 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 22:05:53,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:53,294 INFO L225 Difference]: With dead ends: 133 [2021-03-10 22:05:53,294 INFO L226 Difference]: Without dead ends: 133 [2021-03-10 22:05:53,294 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 252.2ms TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:05:53,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-03-10 22:05:53,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 90. [2021-03-10 22:05:53,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.134831460674157) internal successors, (190), 89 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:53,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 190 transitions. [2021-03-10 22:05:53,295 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 190 transitions. Word has length 17 [2021-03-10 22:05:53,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:53,295 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 190 transitions. [2021-03-10 22:05:53,295 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:53,295 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 190 transitions. [2021-03-10 22:05:53,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 22:05:53,296 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:53,296 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:53,496 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5739,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:53,496 INFO L428 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:53,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:53,496 INFO L82 PathProgramCache]: Analyzing trace with hash 1273379765, now seen corresponding path program 135 times [2021-03-10 22:05:53,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:53,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826384032] [2021-03-10 22:05:53,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:53,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:53,554 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:53,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826384032] [2021-03-10 22:05:53,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229440253] [2021-03-10 22:05:53,554 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:53,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:05:53,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:53,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 22:05:53,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:53,740 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:53,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:53,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:05:53,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101855276] [2021-03-10 22:05:53,741 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:05:53,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:53,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:05:53,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:05:53,741 INFO L87 Difference]: Start difference. First operand 90 states and 190 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:53,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:53,889 INFO L93 Difference]: Finished difference Result 110 states and 226 transitions. [2021-03-10 22:05:53,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:05:53,889 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 22:05:53,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:53,890 INFO L225 Difference]: With dead ends: 110 [2021-03-10 22:05:53,890 INFO L226 Difference]: Without dead ends: 110 [2021-03-10 22:05:53,890 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 171.9ms TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:05:53,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-03-10 22:05:53,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 90. [2021-03-10 22:05:53,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.134831460674157) internal successors, (190), 89 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:53,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 190 transitions. [2021-03-10 22:05:53,891 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 190 transitions. Word has length 17 [2021-03-10 22:05:53,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:53,891 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 190 transitions. [2021-03-10 22:05:53,891 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:53,891 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 190 transitions. [2021-03-10 22:05:53,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 22:05:53,891 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:53,891 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:54,091 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5784 [2021-03-10 22:05:54,095 INFO L428 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:54,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:54,095 INFO L82 PathProgramCache]: Analyzing trace with hash 908659230, now seen corresponding path program 136 times [2021-03-10 22:05:54,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:54,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260421872] [2021-03-10 22:05:54,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:54,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:54,152 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:54,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260421872] [2021-03-10 22:05:54,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046986054] [2021-03-10 22:05:54,152 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:54,198 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:05:54,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:54,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 22:05:54,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:54,441 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:54,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:54,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:05:54,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827912212] [2021-03-10 22:05:54,441 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:05:54,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:54,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:05:54,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:05:54,441 INFO L87 Difference]: Start difference. First operand 90 states and 190 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:54,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:54,702 INFO L93 Difference]: Finished difference Result 117 states and 230 transitions. [2021-03-10 22:05:54,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:05:54,703 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 22:05:54,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:54,703 INFO L225 Difference]: With dead ends: 117 [2021-03-10 22:05:54,703 INFO L226 Difference]: Without dead ends: 113 [2021-03-10 22:05:54,703 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 346.6ms TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:05:54,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-03-10 22:05:54,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 89. [2021-03-10 22:05:54,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 2.125) internal successors, (187), 88 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:54,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 187 transitions. [2021-03-10 22:05:54,704 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 187 transitions. Word has length 17 [2021-03-10 22:05:54,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:54,704 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 187 transitions. [2021-03-10 22:05:54,704 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:54,704 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 187 transitions. [2021-03-10 22:05:54,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 22:05:54,705 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:54,705 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:54,905 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5800,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:54,905 INFO L428 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:54,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:54,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1861125087, now seen corresponding path program 137 times [2021-03-10 22:05:54,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:54,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801549992] [2021-03-10 22:05:54,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:54,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:54,961 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:54,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801549992] [2021-03-10 22:05:54,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688356312] [2021-03-10 22:05:54,961 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 22:05:55,008 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:05:55,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:55,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 22:05:55,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:55,096 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:55,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:55,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:05:55,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264654514] [2021-03-10 22:05:55,096 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:05:55,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:55,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:05:55,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:05:55,097 INFO L87 Difference]: Start difference. First operand 89 states and 187 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:55,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:55,246 INFO L93 Difference]: Finished difference Result 106 states and 216 transitions. [2021-03-10 22:05:55,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:05:55,247 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 22:05:55,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:55,247 INFO L225 Difference]: With dead ends: 106 [2021-03-10 22:05:55,247 INFO L226 Difference]: Without dead ends: 106 [2021-03-10 22:05:55,247 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 158.8ms TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:05:55,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-03-10 22:05:55,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 86. [2021-03-10 22:05:55,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.0823529411764707) internal successors, (177), 85 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) [2021-03-10 22:05:55,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 177 transitions. [2021-03-10 22:05:55,248 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 177 transitions. Word has length 17 [2021-03-10 22:05:55,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:55,248 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 177 transitions. [2021-03-10 22:05:55,248 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:55,248 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 177 transitions. [2021-03-10 22:05:55,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 22:05:55,248 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:55,248 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:55,449 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5828 [2021-03-10 22:05:55,449 INFO L428 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:55,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:55,449 INFO L82 PathProgramCache]: Analyzing trace with hash -104033302, now seen corresponding path program 138 times [2021-03-10 22:05:55,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:55,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787259301] [2021-03-10 22:05:55,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:55,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:55,510 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:55,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787259301] [2021-03-10 22:05:55,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575604922] [2021-03-10 22:05:55,511 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:55,558 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:05:55,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:55,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 22:05:55,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:55,692 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:55,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:55,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:05:55,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133069377] [2021-03-10 22:05:55,692 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:05:55,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:55,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:05:55,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:05:55,693 INFO L87 Difference]: Start difference. First operand 86 states and 177 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:55,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:55,839 INFO L93 Difference]: Finished difference Result 92 states and 184 transitions. [2021-03-10 22:05:55,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:05:55,839 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 22:05:55,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:55,840 INFO L225 Difference]: With dead ends: 92 [2021-03-10 22:05:55,840 INFO L226 Difference]: Without dead ends: 86 [2021-03-10 22:05:55,840 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 192.3ms TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:05:55,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-03-10 22:05:55,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2021-03-10 22:05:55,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.070588235294118) internal successors, (176), 85 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:55,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 176 transitions. [2021-03-10 22:05:55,841 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 176 transitions. Word has length 17 [2021-03-10 22:05:55,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:55,841 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 176 transitions. [2021-03-10 22:05:55,841 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:55,841 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 176 transitions. [2021-03-10 22:05:55,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 22:05:55,841 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:55,841 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:56,041 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5832,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:56,041 INFO L428 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:56,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:56,042 INFO L82 PathProgramCache]: Analyzing trace with hash -701452792, now seen corresponding path program 139 times [2021-03-10 22:05:56,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:56,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373174210] [2021-03-10 22:05:56,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:56,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:56,104 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:56,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373174210] [2021-03-10 22:05:56,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619668116] [2021-03-10 22:05:56,104 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:56,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:56,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 22:05:56,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:56,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:56,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:05:56,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:05:56,358 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:56,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:05:56,362 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:56,423 INFO L628 ElimStorePlain]: treesize reduction 59, result has 49.6 percent of original size [2021-03-10 22:05:56,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:05:56,426 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:56,448 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:56,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:05:56,451 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:56,472 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:56,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:05:56,475 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:56,495 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:56,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:05:56,498 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:05:56,517 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:05:56,517 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 5 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:05:56,518 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:140, output treesize:13 [2021-03-10 22:05:56,548 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:56,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:56,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:05:56,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716270848] [2021-03-10 22:05:56,548 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:05:56,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:56,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:05:56,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:05:56,549 INFO L87 Difference]: Start difference. First operand 86 states and 176 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:56,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:56,985 INFO L93 Difference]: Finished difference Result 116 states and 225 transitions. [2021-03-10 22:05:56,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:05:56,986 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 22:05:56,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:56,986 INFO L225 Difference]: With dead ends: 116 [2021-03-10 22:05:56,986 INFO L226 Difference]: Without dead ends: 116 [2021-03-10 22:05:56,986 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 470.0ms TimeCoverageRelationStatistics Valid=141, Invalid=509, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:05:56,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-03-10 22:05:56,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 85. [2021-03-10 22:05:56,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.0714285714285716) internal successors, (174), 84 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) [2021-03-10 22:05:56,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 174 transitions. [2021-03-10 22:05:56,987 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 174 transitions. Word has length 17 [2021-03-10 22:05:56,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:56,987 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 174 transitions. [2021-03-10 22:05:56,987 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:56,987 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 174 transitions. [2021-03-10 22:05:56,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 22:05:56,988 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:56,988 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:57,191 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5842,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:57,191 INFO L428 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:57,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:57,191 INFO L82 PathProgramCache]: Analyzing trace with hash -1684020317, now seen corresponding path program 140 times [2021-03-10 22:05:57,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:57,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304768148] [2021-03-10 22:05:57,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:57,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:57,248 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:57,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304768148] [2021-03-10 22:05:57,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606698146] [2021-03-10 22:05:57,249 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:57,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:05:57,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:57,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 22:05:57,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:57,380 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:57,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:57,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:05:57,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959902850] [2021-03-10 22:05:57,381 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:05:57,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:57,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:05:57,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:05:57,381 INFO L87 Difference]: Start difference. First operand 85 states and 174 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:57,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:57,508 INFO L93 Difference]: Finished difference Result 101 states and 204 transitions. [2021-03-10 22:05:57,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:05:57,508 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 22:05:57,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:57,508 INFO L225 Difference]: With dead ends: 101 [2021-03-10 22:05:57,508 INFO L226 Difference]: Without dead ends: 101 [2021-03-10 22:05:57,508 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 137.8ms TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:05:57,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-03-10 22:05:57,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 87. [2021-03-10 22:05:57,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 2.0930232558139537) internal successors, (180), 86 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:57,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 180 transitions. [2021-03-10 22:05:57,509 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 180 transitions. Word has length 17 [2021-03-10 22:05:57,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:57,509 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 180 transitions. [2021-03-10 22:05:57,509 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:57,509 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 180 transitions. [2021-03-10 22:05:57,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 22:05:57,510 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:57,510 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:57,710 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5865,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:57,710 INFO L428 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:57,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:57,710 INFO L82 PathProgramCache]: Analyzing trace with hash -2048740852, now seen corresponding path program 141 times [2021-03-10 22:05:57,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:57,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936527026] [2021-03-10 22:05:57,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:57,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:57,768 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:57,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936527026] [2021-03-10 22:05:57,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25933499] [2021-03-10 22:05:57,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:57,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 22:05:57,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:57,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 22:05:57,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:58,057 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:58,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:58,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:05:58,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839081620] [2021-03-10 22:05:58,058 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:05:58,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:58,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:05:58,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:05:58,058 INFO L87 Difference]: Start difference. First operand 87 states and 180 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:58,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:58,381 INFO L93 Difference]: Finished difference Result 117 states and 225 transitions. [2021-03-10 22:05:58,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:05:58,381 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 22:05:58,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:58,382 INFO L225 Difference]: With dead ends: 117 [2021-03-10 22:05:58,382 INFO L226 Difference]: Without dead ends: 113 [2021-03-10 22:05:58,382 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 403.3ms TimeCoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:05:58,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-03-10 22:05:58,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 86. [2021-03-10 22:05:58,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.0823529411764707) internal successors, (177), 85 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) [2021-03-10 22:05:58,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 177 transitions. [2021-03-10 22:05:58,385 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 177 transitions. Word has length 17 [2021-03-10 22:05:58,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:58,385 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 177 transitions. [2021-03-10 22:05:58,385 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:58,385 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 177 transitions. [2021-03-10 22:05:58,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 22:05:58,386 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:58,386 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:58,586 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5869 [2021-03-10 22:05:58,586 INFO L428 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:58,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:58,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1096274995, now seen corresponding path program 142 times [2021-03-10 22:05:58,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:58,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366759335] [2021-03-10 22:05:58,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:58,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:58,642 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:58,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366759335] [2021-03-10 22:05:58,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114100993] [2021-03-10 22:05:58,642 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:58,689 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:05:58,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:58,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 22:05:58,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:58,757 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:58,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:58,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:05:58,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606926176] [2021-03-10 22:05:58,757 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:05:58,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:58,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:05:58,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:05:58,757 INFO L87 Difference]: Start difference. First operand 86 states and 177 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:58,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:58,881 INFO L93 Difference]: Finished difference Result 105 states and 213 transitions. [2021-03-10 22:05:58,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:05:58,881 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 22:05:58,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:58,881 INFO L225 Difference]: With dead ends: 105 [2021-03-10 22:05:58,881 INFO L226 Difference]: Without dead ends: 105 [2021-03-10 22:05:58,882 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 132.2ms TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:05:58,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-03-10 22:05:58,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 86. [2021-03-10 22:05:58,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.0823529411764707) internal successors, (177), 85 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) [2021-03-10 22:05:58,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 177 transitions. [2021-03-10 22:05:58,883 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 177 transitions. Word has length 17 [2021-03-10 22:05:58,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:58,883 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 177 transitions. [2021-03-10 22:05:58,883 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:58,883 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 177 transitions. [2021-03-10 22:05:58,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 22:05:58,883 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:58,883 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:59,083 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5895,143 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:59,083 INFO L428 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:59,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:59,083 INFO L82 PathProgramCache]: Analyzing trace with hash 1233533912, now seen corresponding path program 143 times [2021-03-10 22:05:59,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:59,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604757345] [2021-03-10 22:05:59,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:59,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:59,140 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:59,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604757345] [2021-03-10 22:05:59,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768826000] [2021-03-10 22:05:59,140 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 22:05:59,191 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:05:59,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:05:59,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 22:05:59,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:05:59,367 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:59,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:05:59,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:05:59,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735488624] [2021-03-10 22:05:59,367 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:05:59,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:05:59,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:05:59,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:05:59,367 INFO L87 Difference]: Start difference. First operand 86 states and 177 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:59,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:05:59,698 INFO L93 Difference]: Finished difference Result 112 states and 213 transitions. [2021-03-10 22:05:59,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:05:59,699 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 22:05:59,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:05:59,699 INFO L225 Difference]: With dead ends: 112 [2021-03-10 22:05:59,699 INFO L226 Difference]: Without dead ends: 106 [2021-03-10 22:05:59,699 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 385.4ms TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:05:59,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-03-10 22:05:59,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 85. [2021-03-10 22:05:59,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.0714285714285716) internal successors, (174), 84 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) [2021-03-10 22:05:59,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 174 transitions. [2021-03-10 22:05:59,700 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 174 transitions. Word has length 17 [2021-03-10 22:05:59,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:05:59,700 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 174 transitions. [2021-03-10 22:05:59,700 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:05:59,700 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 174 transitions. [2021-03-10 22:05:59,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 22:05:59,700 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:05:59,700 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:05:59,903 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5899,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:05:59,903 INFO L428 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:05:59,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:05:59,903 INFO L82 PathProgramCache]: Analyzing trace with hash -498938337, now seen corresponding path program 144 times [2021-03-10 22:05:59,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:05:59,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888146336] [2021-03-10 22:05:59,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:05:59,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:05:59,956 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:05:59,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888146336] [2021-03-10 22:05:59,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068017076] [2021-03-10 22:05:59,956 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:00,006 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:06:00,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:00,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 22:06:00,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:00,060 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:00,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:00,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-03-10 22:06:00,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090855701] [2021-03-10 22:06:00,061 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 22:06:00,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:00,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 22:06:00,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-03-10 22:06:00,061 INFO L87 Difference]: Start difference. First operand 85 states and 174 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:00,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:00,182 INFO L93 Difference]: Finished difference Result 121 states and 233 transitions. [2021-03-10 22:06:00,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:06:00,182 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 22:06:00,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:00,183 INFO L225 Difference]: With dead ends: 121 [2021-03-10 22:06:00,183 INFO L226 Difference]: Without dead ends: 121 [2021-03-10 22:06:00,193 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 108.0ms TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:06:00,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-03-10 22:06:00,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 81. [2021-03-10 22:06:00,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 2.0625) internal successors, (165), 80 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:00,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 165 transitions. [2021-03-10 22:06:00,194 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 165 transitions. Word has length 17 [2021-03-10 22:06:00,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:00,194 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 165 transitions. [2021-03-10 22:06:00,194 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:00,194 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 165 transitions. [2021-03-10 22:06:00,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 22:06:00,194 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:00,194 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:00,399 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5910 [2021-03-10 22:06:00,399 INFO L428 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:00,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:00,399 INFO L82 PathProgramCache]: Analyzing trace with hash -538062648, now seen corresponding path program 145 times [2021-03-10 22:06:00,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:00,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121671751] [2021-03-10 22:06:00,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:00,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:00,456 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:00,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121671751] [2021-03-10 22:06:00,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954953967] [2021-03-10 22:06:00,456 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:00,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:00,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 22:06:00,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:00,630 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:00,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:00,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:06:00,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892503424] [2021-03-10 22:06:00,631 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:06:00,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:00,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:06:00,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:06:00,631 INFO L87 Difference]: Start difference. First operand 81 states and 165 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:00,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:00,841 INFO L93 Difference]: Finished difference Result 92 states and 180 transitions. [2021-03-10 22:06:00,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 22:06:00,841 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 22:06:00,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:00,841 INFO L225 Difference]: With dead ends: 92 [2021-03-10 22:06:00,841 INFO L226 Difference]: Without dead ends: 84 [2021-03-10 22:06:00,841 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 258.4ms TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:06:00,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-03-10 22:06:00,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 81. [2021-03-10 22:06:00,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 2.05) internal successors, (164), 80 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:00,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 164 transitions. [2021-03-10 22:06:00,842 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 164 transitions. Word has length 17 [2021-03-10 22:06:00,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:00,842 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 164 transitions. [2021-03-10 22:06:00,842 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:00,843 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 164 transitions. [2021-03-10 22:06:00,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:06:00,843 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:00,843 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:01,043 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5914,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:01,044 INFO L428 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:01,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:01,044 INFO L82 PathProgramCache]: Analyzing trace with hash 1488406346, now seen corresponding path program 146 times [2021-03-10 22:06:01,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:01,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888887269] [2021-03-10 22:06:01,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:01,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:01,251 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:01,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888887269] [2021-03-10 22:06:01,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345309722] [2021-03-10 22:06:01,251 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:01,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:06:01,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:01,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:06:01,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:01,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:01,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:01,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-03-10 22:06:01,878 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:01,881 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:01,882 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:01,884 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:01,885 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:01,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:01,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:06:01,889 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:01,947 INFO L628 ElimStorePlain]: treesize reduction 109, result has 35.1 percent of original size [2021-03-10 22:06:01,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:06:01,950 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:01,972 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:01,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:06:01,975 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:01,995 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:01,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:06:01,997 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:02,016 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:02,017 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:06:02,017 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 4 variables, input treesize:284, output treesize:46 [2021-03-10 22:06:02,093 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:02,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:02,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-03-10 22:06:02,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848115306] [2021-03-10 22:06:02,094 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:06:02,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:02,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:06:02,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:06:02,094 INFO L87 Difference]: Start difference. First operand 81 states and 164 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:02,341 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2021-03-10 22:06:02,531 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2021-03-10 22:06:02,714 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2021-03-10 22:06:02,882 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2021-03-10 22:06:03,041 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 64 [2021-03-10 22:06:03,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:03,073 INFO L93 Difference]: Finished difference Result 152 states and 289 transitions. [2021-03-10 22:06:03,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:06:03,073 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:06:03,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:03,073 INFO L225 Difference]: With dead ends: 152 [2021-03-10 22:06:03,073 INFO L226 Difference]: Without dead ends: 128 [2021-03-10 22:06:03,073 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 1226.8ms TimeCoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:06:03,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-03-10 22:06:03,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 83. [2021-03-10 22:06:03,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.048780487804878) internal successors, (168), 82 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:03,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 168 transitions. [2021-03-10 22:06:03,074 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 168 transitions. Word has length 18 [2021-03-10 22:06:03,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:03,075 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 168 transitions. [2021-03-10 22:06:03,075 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:03,075 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 168 transitions. [2021-03-10 22:06:03,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:06:03,075 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:03,075 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:03,275 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5924,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:03,275 INFO L428 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:03,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:03,275 INFO L82 PathProgramCache]: Analyzing trace with hash -857142774, now seen corresponding path program 147 times [2021-03-10 22:06:03,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:03,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824787117] [2021-03-10 22:06:03,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:03,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:03,573 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:03,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824787117] [2021-03-10 22:06:03,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180322194] [2021-03-10 22:06:03,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:03,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:06:03,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:03,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 22:06:03,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:04,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:04,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:04,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-03-10 22:06:04,362 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:04,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:04,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:04,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:06:04,366 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:04,369 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:04,369 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:04,372 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:04,372 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:04,433 INFO L628 ElimStorePlain]: treesize reduction 123, result has 32.4 percent of original size [2021-03-10 22:06:04,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:06:04,436 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:04,457 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:04,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:06:04,460 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:04,480 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:04,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:06:04,483 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:04,502 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:04,502 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:06:04,502 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 4 variables, input treesize:284, output treesize:46 [2021-03-10 22:06:04,582 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:04,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:04,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-03-10 22:06:04,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622275239] [2021-03-10 22:06:04,582 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:06:04,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:04,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:06:04,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:06:04,583 INFO L87 Difference]: Start difference. First operand 83 states and 168 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:04,854 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 74 [2021-03-10 22:06:05,031 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 67 [2021-03-10 22:06:05,157 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 66 [2021-03-10 22:06:05,342 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2021-03-10 22:06:05,482 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 65 [2021-03-10 22:06:05,821 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 65 [2021-03-10 22:06:06,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:06,037 INFO L93 Difference]: Finished difference Result 181 states and 353 transitions. [2021-03-10 22:06:06,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 22:06:06,037 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:06:06,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:06,038 INFO L225 Difference]: With dead ends: 181 [2021-03-10 22:06:06,038 INFO L226 Difference]: Without dead ends: 155 [2021-03-10 22:06:06,038 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 1755.8ms TimeCoverageRelationStatistics Valid=134, Invalid=858, Unknown=0, NotChecked=0, Total=992 [2021-03-10 22:06:06,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-03-10 22:06:06,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 86. [2021-03-10 22:06:06,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.070588235294118) internal successors, (176), 85 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:06,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 176 transitions. [2021-03-10 22:06:06,039 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 176 transitions. Word has length 18 [2021-03-10 22:06:06,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:06,039 INFO L480 AbstractCegarLoop]: Abstraction has 86 states and 176 transitions. [2021-03-10 22:06:06,039 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:06,039 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 176 transitions. [2021-03-10 22:06:06,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:06:06,039 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:06,039 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:06,240 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6025 [2021-03-10 22:06:06,240 INFO L428 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:06,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:06,240 INFO L82 PathProgramCache]: Analyzing trace with hash 48811164, now seen corresponding path program 148 times [2021-03-10 22:06:06,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:06,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497979049] [2021-03-10 22:06:06,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:06,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:06,410 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:06,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497979049] [2021-03-10 22:06:06,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462812239] [2021-03-10 22:06:06,410 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:06,461 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:06:06,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:06,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:06:06,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:06,962 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:06,963 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:06,965 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:06,966 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:06,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:06,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:06,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:06:06,970 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:06,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:06,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-03-10 22:06:06,974 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:07,035 INFO L628 ElimStorePlain]: treesize reduction 123, result has 32.4 percent of original size [2021-03-10 22:06:07,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:06:07,038 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:07,059 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:07,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:06:07,062 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:07,082 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:07,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:06:07,085 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:07,104 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:07,104 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:06:07,104 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 4 variables, input treesize:284, output treesize:46 [2021-03-10 22:06:07,180 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:07,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:07,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-03-10 22:06:07,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522865596] [2021-03-10 22:06:07,181 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:06:07,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:07,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:06:07,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:06:07,181 INFO L87 Difference]: Start difference. First operand 86 states and 176 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:07,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:07,454 INFO L93 Difference]: Finished difference Result 128 states and 248 transitions. [2021-03-10 22:06:07,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:06:07,454 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:06:07,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:07,455 INFO L225 Difference]: With dead ends: 128 [2021-03-10 22:06:07,455 INFO L226 Difference]: Without dead ends: 109 [2021-03-10 22:06:07,455 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 481.2ms TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:06:07,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-03-10 22:06:07,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 88. [2021-03-10 22:06:07,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 2.0689655172413794) internal successors, (180), 87 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:07,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 180 transitions. [2021-03-10 22:06:07,456 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 180 transitions. Word has length 18 [2021-03-10 22:06:07,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:07,456 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 180 transitions. [2021-03-10 22:06:07,456 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:07,456 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 180 transitions. [2021-03-10 22:06:07,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:06:07,456 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:07,456 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:07,670 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6213 [2021-03-10 22:06:07,671 INFO L428 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:07,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:07,671 INFO L82 PathProgramCache]: Analyzing trace with hash -982261800, now seen corresponding path program 149 times [2021-03-10 22:06:07,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:07,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086770700] [2021-03-10 22:06:07,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:07,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:07,853 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:07,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086770700] [2021-03-10 22:06:07,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723982681] [2021-03-10 22:06:07,853 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 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 [2021-03-10 22:06:07,906 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:06:07,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:07,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:06:07,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:08,520 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:08,520 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:08,523 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:08,524 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:08,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:08,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:08,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:06:08,528 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:08,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:08,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:08,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:06:08,533 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:08,535 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:08,536 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:08,598 INFO L628 ElimStorePlain]: treesize reduction 158, result has 27.5 percent of original size [2021-03-10 22:06:08,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:06:08,601 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:08,623 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:08,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:06:08,625 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:08,646 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:08,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:06:08,648 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:08,667 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:08,668 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:06:08,668 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 4 variables, input treesize:356, output treesize:46 [2021-03-10 22:06:08,745 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:08,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:08,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-03-10 22:06:08,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079904045] [2021-03-10 22:06:08,745 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:06:08,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:08,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:06:08,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:06:08,746 INFO L87 Difference]: Start difference. First operand 88 states and 180 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:09,003 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 53 [2021-03-10 22:06:09,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:09,057 INFO L93 Difference]: Finished difference Result 126 states and 245 transitions. [2021-03-10 22:06:09,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:06:09,057 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:06:09,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:09,058 INFO L225 Difference]: With dead ends: 126 [2021-03-10 22:06:09,058 INFO L226 Difference]: Without dead ends: 110 [2021-03-10 22:06:09,058 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 557.6ms TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:06:09,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-03-10 22:06:09,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 89. [2021-03-10 22:06:09,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 2.0681818181818183) internal successors, (182), 88 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:09,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 182 transitions. [2021-03-10 22:06:09,059 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 182 transitions. Word has length 18 [2021-03-10 22:06:09,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:09,059 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 182 transitions. [2021-03-10 22:06:09,059 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:09,059 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 182 transitions. [2021-03-10 22:06:09,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:06:09,059 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:09,059 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:09,271 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6312 [2021-03-10 22:06:09,271 INFO L428 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:09,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:09,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1339782428, now seen corresponding path program 150 times [2021-03-10 22:06:09,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:09,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267176077] [2021-03-10 22:06:09,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:09,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:09,509 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:09,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267176077] [2021-03-10 22:06:09,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193266376] [2021-03-10 22:06:09,509 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:09,566 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:06:09,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:09,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:06:09,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:10,190 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:10,191 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:10,194 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:10,194 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:10,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:10,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:10,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:06:10,199 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:10,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:10,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:06:10,203 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:10,266 INFO L628 ElimStorePlain]: treesize reduction 153, result has 28.8 percent of original size [2021-03-10 22:06:10,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:06:10,269 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:10,291 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:10,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:06:10,294 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:10,314 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:10,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:06:10,317 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:10,336 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:10,337 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:06:10,337 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 4 variables, input treesize:319, output treesize:46 [2021-03-10 22:06:10,415 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:10,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:10,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-03-10 22:06:10,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719690606] [2021-03-10 22:06:10,416 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:06:10,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:10,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:06:10,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:06:10,416 INFO L87 Difference]: Start difference. First operand 89 states and 182 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:10,891 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 53 [2021-03-10 22:06:10,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:10,945 INFO L93 Difference]: Finished difference Result 131 states and 256 transitions. [2021-03-10 22:06:10,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:06:10,946 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:06:10,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:10,946 INFO L225 Difference]: With dead ends: 131 [2021-03-10 22:06:10,946 INFO L226 Difference]: Without dead ends: 118 [2021-03-10 22:06:10,946 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 779.1ms TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:06:10,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-03-10 22:06:10,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 90. [2021-03-10 22:06:10,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.067415730337079) internal successors, (184), 89 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:10,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 184 transitions. [2021-03-10 22:06:10,947 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 184 transitions. Word has length 18 [2021-03-10 22:06:10,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:10,947 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 184 transitions. [2021-03-10 22:06:10,947 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:10,947 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 184 transitions. [2021-03-10 22:06:10,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:06:10,947 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:10,947 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:11,148 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6473 [2021-03-10 22:06:11,148 INFO L428 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:11,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:11,148 INFO L82 PathProgramCache]: Analyzing trace with hash 860497752, now seen corresponding path program 151 times [2021-03-10 22:06:11,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:11,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584588190] [2021-03-10 22:06:11,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:11,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:11,348 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:11,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584588190] [2021-03-10 22:06:11,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891218158] [2021-03-10 22:06:11,348 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:11,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:11,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:06:11,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:12,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:12,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:12,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:06:12,333 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:12,337 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:12,338 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:12,342 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:12,342 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:12,346 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:12,347 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:12,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:12,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:06:12,352 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:12,505 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 67 [2021-03-10 22:06:12,505 INFO L628 ElimStorePlain]: treesize reduction 497, result has 19.1 percent of original size [2021-03-10 22:06:12,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:06:12,509 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:12,557 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:12,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:06:12,561 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:12,606 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:12,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:06:12,610 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:12,653 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:12,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:06:12,657 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:12,700 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:12,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:06:12,703 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:12,744 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:12,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:06:12,748 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:12,787 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:12,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:06:12,791 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:12,829 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:12,830 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:06:12,830 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 10 variables, input treesize:769, output treesize:73 [2021-03-10 22:06:12,970 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:12,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:12,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-03-10 22:06:12,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605971188] [2021-03-10 22:06:12,970 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:06:12,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:12,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:06:12,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:06:12,971 INFO L87 Difference]: Start difference. First operand 90 states and 184 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:13,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:13,311 INFO L93 Difference]: Finished difference Result 124 states and 243 transitions. [2021-03-10 22:06:13,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:06:13,311 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:06:13,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:13,312 INFO L225 Difference]: With dead ends: 124 [2021-03-10 22:06:13,312 INFO L226 Difference]: Without dead ends: 112 [2021-03-10 22:06:13,312 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 545.3ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:06:13,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-03-10 22:06:13,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 91. [2021-03-10 22:06:13,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 2.066666666666667) internal successors, (186), 90 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:13,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 186 transitions. [2021-03-10 22:06:13,313 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 186 transitions. Word has length 18 [2021-03-10 22:06:13,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:13,313 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 186 transitions. [2021-03-10 22:06:13,313 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:13,313 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 186 transitions. [2021-03-10 22:06:13,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:06:13,313 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:13,313 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:13,513 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6628 [2021-03-10 22:06:13,513 INFO L428 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:13,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:13,514 INFO L82 PathProgramCache]: Analyzing trace with hash 57973998, now seen corresponding path program 152 times [2021-03-10 22:06:13,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:13,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157795778] [2021-03-10 22:06:13,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:13,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:13,674 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:13,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157795778] [2021-03-10 22:06:13,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941278980] [2021-03-10 22:06:13,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:13,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:06:13,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:13,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:06:13,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:14,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:14,405 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:14,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-03-10 22:06:14,406 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:14,410 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:14,410 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:14,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:14,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:14,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:06:14,416 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:14,424 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:14,425 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:14,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:14,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:14,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-03-10 22:06:14,431 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:14,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:14,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:14,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:06:14,437 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:14,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:14,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:14,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:06:14,442 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:14,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:14,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:14,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:06:14,447 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:14,450 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:14,451 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:14,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:14,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:14,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-03-10 22:06:14,456 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:14,459 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:14,460 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:14,463 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:14,464 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:14,467 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:14,467 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:14,470 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:14,471 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:14,474 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:14,474 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:14,532 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-03-10 22:06:14,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:06:14,535 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:14,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:06:14,539 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:14,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:06:14,542 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:14,565 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:14,566 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:06:14,566 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 4 variables, input treesize:591, output treesize:52 [2021-03-10 22:06:14,647 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:14,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:14,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-03-10 22:06:14,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48352445] [2021-03-10 22:06:14,647 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:06:14,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:14,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:06:14,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:06:14,648 INFO L87 Difference]: Start difference. First operand 91 states and 186 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:15,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:15,119 INFO L93 Difference]: Finished difference Result 140 states and 278 transitions. [2021-03-10 22:06:15,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:06:15,120 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:06:15,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:15,120 INFO L225 Difference]: With dead ends: 140 [2021-03-10 22:06:15,120 INFO L226 Difference]: Without dead ends: 124 [2021-03-10 22:06:15,120 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 636.4ms TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:06:15,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-03-10 22:06:15,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 93. [2021-03-10 22:06:15,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.0652173913043477) internal successors, (190), 92 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:15,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 190 transitions. [2021-03-10 22:06:15,121 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 190 transitions. Word has length 18 [2021-03-10 22:06:15,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:15,121 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 190 transitions. [2021-03-10 22:06:15,121 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:15,121 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 190 transitions. [2021-03-10 22:06:15,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:06:15,122 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:15,122 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:15,322 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6794 [2021-03-10 22:06:15,322 INFO L428 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:15,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:15,322 INFO L82 PathProgramCache]: Analyzing trace with hash -1914949070, now seen corresponding path program 153 times [2021-03-10 22:06:15,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:15,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878291141] [2021-03-10 22:06:15,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:15,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:15,491 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:15,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878291141] [2021-03-10 22:06:15,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601718281] [2021-03-10 22:06:15,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:15,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:06:15,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:15,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 22:06:15,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:16,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:16,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:16,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-03-10 22:06:16,323 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:16,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:16,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:16,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-03-10 22:06:16,329 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:16,333 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:16,333 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:16,337 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:16,338 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:16,342 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:16,343 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:16,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:16,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:16,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:06:16,349 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:16,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:16,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:16,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:06:16,354 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:16,357 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:16,358 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:16,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:16,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:16,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:06:16,363 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:16,366 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:16,367 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:16,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:16,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:16,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:06:16,372 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:16,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:16,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:16,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-03-10 22:06:16,377 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:16,381 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:16,381 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:16,385 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:16,385 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:16,388 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:16,389 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:16,452 INFO L628 ElimStorePlain]: treesize reduction 17, result has 81.9 percent of original size [2021-03-10 22:06:16,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:06:16,456 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:16,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:06:16,459 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:16,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:06:16,462 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:16,485 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:16,486 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:06:16,486 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 4 variables, input treesize:606, output treesize:52 [2021-03-10 22:06:16,565 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:16,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:16,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-03-10 22:06:16,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186608372] [2021-03-10 22:06:16,565 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:06:16,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:16,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:06:16,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:06:16,566 INFO L87 Difference]: Start difference. First operand 93 states and 190 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:16,912 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 57 [2021-03-10 22:06:17,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:17,016 INFO L93 Difference]: Finished difference Result 137 states and 272 transitions. [2021-03-10 22:06:17,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:06:17,016 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:06:17,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:17,017 INFO L225 Difference]: With dead ends: 137 [2021-03-10 22:06:17,017 INFO L226 Difference]: Without dead ends: 124 [2021-03-10 22:06:17,017 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 689.4ms TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:06:17,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-03-10 22:06:17,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 94. [2021-03-10 22:06:17,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.064516129032258) internal successors, (192), 93 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:17,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 192 transitions. [2021-03-10 22:06:17,018 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 192 transitions. Word has length 18 [2021-03-10 22:06:17,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:17,018 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 192 transitions. [2021-03-10 22:06:17,018 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:17,018 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 192 transitions. [2021-03-10 22:06:17,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:06:17,018 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:17,018 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:17,218 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6964,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:17,219 INFO L428 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:17,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:17,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1900733550, now seen corresponding path program 154 times [2021-03-10 22:06:17,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:17,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308239001] [2021-03-10 22:06:17,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:17,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:17,395 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:17,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308239001] [2021-03-10 22:06:17,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105589599] [2021-03-10 22:06:17,395 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:17,448 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:06:17,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:17,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:06:17,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:18,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:18,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:18,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:06:18,214 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:18,218 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:18,219 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:18,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:18,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:18,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:06:18,225 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:18,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:18,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:18,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:06:18,231 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:18,235 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:18,236 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:18,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:18,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:18,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-03-10 22:06:18,242 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:18,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:18,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:18,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-03-10 22:06:18,248 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:18,252 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:18,253 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:18,257 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:18,257 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:18,262 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:18,262 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:18,266 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:18,267 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:18,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:18,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:18,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:06:18,273 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:18,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:18,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:18,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:06:18,278 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:18,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:18,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:18,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:06:18,283 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:18,287 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:18,287 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:18,290 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:18,291 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:18,402 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2021-03-10 22:06:18,402 INFO L628 ElimStorePlain]: treesize reduction 18, result has 87.2 percent of original size [2021-03-10 22:06:18,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:06:18,406 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:18,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:06:18,410 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:18,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:06:18,414 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:18,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:06:18,417 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:18,461 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:18,462 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:06:18,462 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 5 variables, input treesize:709, output treesize:79 [2021-03-10 22:06:18,604 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:18,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:18,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-03-10 22:06:18,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677641433] [2021-03-10 22:06:18,604 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:06:18,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:18,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:06:18,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:06:18,605 INFO L87 Difference]: Start difference. First operand 94 states and 192 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:19,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:19,108 INFO L93 Difference]: Finished difference Result 136 states and 270 transitions. [2021-03-10 22:06:19,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:06:19,109 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:06:19,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:19,109 INFO L225 Difference]: With dead ends: 136 [2021-03-10 22:06:19,109 INFO L226 Difference]: Without dead ends: 124 [2021-03-10 22:06:19,109 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 628.9ms TimeCoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:06:19,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-03-10 22:06:19,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 92. [2021-03-10 22:06:19,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.065934065934066) internal successors, (188), 91 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:19,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 188 transitions. [2021-03-10 22:06:19,110 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 188 transitions. Word has length 18 [2021-03-10 22:06:19,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:19,110 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 188 transitions. [2021-03-10 22:06:19,110 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:19,110 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 188 transitions. [2021-03-10 22:06:19,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:06:19,111 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:19,111 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:19,315 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7145 [2021-03-10 22:06:19,315 INFO L428 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:19,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:19,315 INFO L82 PathProgramCache]: Analyzing trace with hash -1327203748, now seen corresponding path program 155 times [2021-03-10 22:06:19,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:19,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585058529] [2021-03-10 22:06:19,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:19,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:19,484 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:19,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585058529] [2021-03-10 22:06:19,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433901311] [2021-03-10 22:06:19,484 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:19,537 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 22:06:19,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:19,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:06:19,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:19,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:06:19,731 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:19,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:06:19,735 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:19,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:06:19,738 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:19,764 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:19,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:06:19,767 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:19,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:06:19,771 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:19,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:06:19,773 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:19,795 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:19,796 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:06:19,796 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:84, output treesize:48 [2021-03-10 22:06:19,870 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:19,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:19,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-03-10 22:06:19,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955838303] [2021-03-10 22:06:19,870 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:06:19,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:19,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:06:19,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:06:19,871 INFO L87 Difference]: Start difference. First operand 92 states and 188 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:20,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:20,059 INFO L93 Difference]: Finished difference Result 128 states and 250 transitions. [2021-03-10 22:06:20,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:06:20,059 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:06:20,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:20,060 INFO L225 Difference]: With dead ends: 128 [2021-03-10 22:06:20,060 INFO L226 Difference]: Without dead ends: 115 [2021-03-10 22:06:20,060 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 379.2ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:06:20,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-03-10 22:06:20,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 94. [2021-03-10 22:06:20,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.064516129032258) internal successors, (192), 93 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:20,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 192 transitions. [2021-03-10 22:06:20,061 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 192 transitions. Word has length 18 [2021-03-10 22:06:20,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:20,061 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 192 transitions. [2021-03-10 22:06:20,061 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:20,061 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 192 transitions. [2021-03-10 22:06:20,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:06:20,061 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:20,061 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:20,271 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7383,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:20,271 INFO L428 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:20,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:20,271 INFO L82 PathProgramCache]: Analyzing trace with hash -1806488424, now seen corresponding path program 156 times [2021-03-10 22:06:20,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:20,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727111744] [2021-03-10 22:06:20,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:20,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:20,437 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:20,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727111744] [2021-03-10 22:06:20,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237976142] [2021-03-10 22:06:20,437 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:20,490 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 22:06:20,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:20,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:06:20,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:20,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:06:20,656 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:20,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:06:20,660 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:20,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:06:20,664 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:20,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:06:20,667 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:20,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:06:20,671 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:20,729 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:20,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:06:20,733 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:20,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:06:20,737 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:20,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:06:20,740 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:20,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:06:20,744 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:20,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:06:20,747 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:20,797 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:20,799 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 22:06:20,799 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 3 variables, input treesize:172, output treesize:104 [2021-03-10 22:06:20,976 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:20,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:20,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-03-10 22:06:20,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653890692] [2021-03-10 22:06:20,977 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:06:20,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:20,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:06:20,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:06:20,977 INFO L87 Difference]: Start difference. First operand 94 states and 192 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:21,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:21,597 INFO L93 Difference]: Finished difference Result 173 states and 333 transitions. [2021-03-10 22:06:21,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:06:21,597 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:06:21,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:21,597 INFO L225 Difference]: With dead ends: 173 [2021-03-10 22:06:21,597 INFO L226 Difference]: Without dead ends: 147 [2021-03-10 22:06:21,598 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 801.8ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:06:21,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-03-10 22:06:21,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 95. [2021-03-10 22:06:21,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.0638297872340425) internal successors, (194), 94 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:21,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 194 transitions. [2021-03-10 22:06:21,599 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 194 transitions. Word has length 18 [2021-03-10 22:06:21,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:21,599 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 194 transitions. [2021-03-10 22:06:21,599 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:21,599 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 194 transitions. [2021-03-10 22:06:21,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:06:21,599 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:21,599 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:21,799 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7407,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:21,799 INFO L428 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:21,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:21,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1953249070, now seen corresponding path program 157 times [2021-03-10 22:06:21,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:21,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123738399] [2021-03-10 22:06:21,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:21,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:22,074 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:22,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123738399] [2021-03-10 22:06:22,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911947797] [2021-03-10 22:06:22,074 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:22,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:22,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:06:22,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:22,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:06:22,307 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:22,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:06:22,310 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:22,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:06:22,314 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:22,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:06:22,318 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:22,367 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:22,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:06:22,371 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:22,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:06:22,374 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:22,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:06:22,378 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:22,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:06:22,381 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:22,423 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:22,424 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:06:22,424 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:135, output treesize:79 [2021-03-10 22:06:22,557 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:22,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:22,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-03-10 22:06:22,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836983514] [2021-03-10 22:06:22,558 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:06:22,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:22,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:06:22,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:06:22,558 INFO L87 Difference]: Start difference. First operand 95 states and 194 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:23,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:23,251 INFO L93 Difference]: Finished difference Result 146 states and 294 transitions. [2021-03-10 22:06:23,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 22:06:23,251 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:06:23,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:23,251 INFO L225 Difference]: With dead ends: 146 [2021-03-10 22:06:23,252 INFO L226 Difference]: Without dead ends: 134 [2021-03-10 22:06:23,252 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 960.6ms TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:06:23,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-03-10 22:06:23,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 96. [2021-03-10 22:06:23,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.0736842105263156) internal successors, (197), 95 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:23,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 197 transitions. [2021-03-10 22:06:23,253 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 197 transitions. Word has length 18 [2021-03-10 22:06:23,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:23,253 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 197 transitions. [2021-03-10 22:06:23,253 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:23,253 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 197 transitions. [2021-03-10 22:06:23,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:06:23,253 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:23,253 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:23,453 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7430 [2021-03-10 22:06:23,453 INFO L428 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:23,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:23,454 INFO L82 PathProgramCache]: Analyzing trace with hash -1931387830, now seen corresponding path program 158 times [2021-03-10 22:06:23,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:23,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611826733] [2021-03-10 22:06:23,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:23,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:23,644 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:23,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611826733] [2021-03-10 22:06:23,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958698147] [2021-03-10 22:06:23,644 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:23,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:06:23,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:23,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:06:23,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:24,332 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:24,333 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:24,336 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:24,336 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:24,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:24,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:24,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:06:24,341 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:24,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:24,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:06:24,345 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:24,410 INFO L628 ElimStorePlain]: treesize reduction 120, result has 33.3 percent of original size [2021-03-10 22:06:24,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:06:24,414 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:24,436 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:24,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:06:24,439 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:24,460 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:24,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:06:24,462 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:24,481 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:24,482 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:06:24,482 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 4 variables, input treesize:284, output treesize:46 [2021-03-10 22:06:24,572 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:24,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:24,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-03-10 22:06:24,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508978111] [2021-03-10 22:06:24,572 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 22:06:24,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:24,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 22:06:24,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:06:24,573 INFO L87 Difference]: Start difference. First operand 96 states and 197 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 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) [2021-03-10 22:06:25,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:25,004 INFO L93 Difference]: Finished difference Result 130 states and 261 transitions. [2021-03-10 22:06:25,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:06:25,004 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 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 18 [2021-03-10 22:06:25,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:25,005 INFO L225 Difference]: With dead ends: 130 [2021-03-10 22:06:25,005 INFO L226 Difference]: Without dead ends: 111 [2021-03-10 22:06:25,005 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 686.2ms TimeCoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:06:25,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-03-10 22:06:25,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 99. [2021-03-10 22:06:25,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.0714285714285716) internal successors, (203), 98 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:25,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 203 transitions. [2021-03-10 22:06:25,006 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 203 transitions. Word has length 18 [2021-03-10 22:06:25,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:25,006 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 203 transitions. [2021-03-10 22:06:25,006 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 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) [2021-03-10 22:06:25,006 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 203 transitions. [2021-03-10 22:06:25,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:06:25,006 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:25,006 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:25,206 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7457 [2021-03-10 22:06:25,207 INFO L428 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:25,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:25,207 INFO L82 PathProgramCache]: Analyzing trace with hash 1332506502, now seen corresponding path program 159 times [2021-03-10 22:06:25,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:25,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602501558] [2021-03-10 22:06:25,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:25,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:25,552 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:25,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602501558] [2021-03-10 22:06:25,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859936021] [2021-03-10 22:06:25,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:25,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:06:25,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:25,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:06:25,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:26,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:26,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:26,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:06:26,205 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:26,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:26,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:26,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:06:26,209 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:26,211 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:26,212 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:26,215 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:26,215 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:26,276 INFO L628 ElimStorePlain]: treesize reduction 122, result has 32.2 percent of original size [2021-03-10 22:06:26,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:06:26,279 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:26,301 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:26,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:06:26,304 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:26,325 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:26,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:06:26,327 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:26,346 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:26,347 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:06:26,347 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 4 variables, input treesize:284, output treesize:46 [2021-03-10 22:06:26,426 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:26,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:26,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-03-10 22:06:26,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393467479] [2021-03-10 22:06:26,426 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:06:26,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:26,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:06:26,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:06:26,427 INFO L87 Difference]: Start difference. First operand 99 states and 203 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:26,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:26,659 INFO L93 Difference]: Finished difference Result 118 states and 232 transitions. [2021-03-10 22:06:26,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:06:26,659 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:06:26,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:26,659 INFO L225 Difference]: With dead ends: 118 [2021-03-10 22:06:26,659 INFO L226 Difference]: Without dead ends: 102 [2021-03-10 22:06:26,659 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 669.8ms TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:06:26,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-03-10 22:06:26,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 100. [2021-03-10 22:06:26,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.0707070707070705) internal successors, (205), 99 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:26,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 205 transitions. [2021-03-10 22:06:26,660 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 205 transitions. Word has length 18 [2021-03-10 22:06:26,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:26,661 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 205 transitions. [2021-03-10 22:06:26,661 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:26,661 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 205 transitions. [2021-03-10 22:06:26,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:06:26,661 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:26,661 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:26,861 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7553 [2021-03-10 22:06:26,861 INFO L428 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:26,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:26,861 INFO L82 PathProgramCache]: Analyzing trace with hash -640416566, now seen corresponding path program 160 times [2021-03-10 22:06:26,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:26,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390877266] [2021-03-10 22:06:26,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:26,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:27,087 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:27,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390877266] [2021-03-10 22:06:27,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710543476] [2021-03-10 22:06:27,088 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 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 [2021-03-10 22:06:27,140 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:06:27,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:27,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:06:27,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:27,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:27,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:27,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-03-10 22:06:27,717 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:27,719 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:27,720 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:27,723 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:27,723 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:27,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:27,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:06:27,727 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:27,787 INFO L628 ElimStorePlain]: treesize reduction 111, result has 33.9 percent of original size [2021-03-10 22:06:27,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:06:27,790 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:27,812 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:27,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:06:27,815 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:27,836 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:27,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:06:27,838 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:27,863 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:27,863 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:06:27,864 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 4 variables, input treesize:284, output treesize:46 [2021-03-10 22:06:27,943 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:27,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:27,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-03-10 22:06:27,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880550006] [2021-03-10 22:06:27,943 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:06:27,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:27,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:06:27,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:06:27,944 INFO L87 Difference]: Start difference. First operand 100 states and 205 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:28,320 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 53 [2021-03-10 22:06:28,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:28,432 INFO L93 Difference]: Finished difference Result 124 states and 249 transitions. [2021-03-10 22:06:28,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:06:28,432 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:06:28,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:28,433 INFO L225 Difference]: With dead ends: 124 [2021-03-10 22:06:28,433 INFO L226 Difference]: Without dead ends: 111 [2021-03-10 22:06:28,433 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 738.0ms TimeCoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:06:28,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-03-10 22:06:28,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 101. [2021-03-10 22:06:28,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.07) internal successors, (207), 100 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:28,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 207 transitions. [2021-03-10 22:06:28,434 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 207 transitions. Word has length 18 [2021-03-10 22:06:28,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:28,434 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 207 transitions. [2021-03-10 22:06:28,434 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:28,434 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 207 transitions. [2021-03-10 22:06:28,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:06:28,434 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:28,434 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:28,634 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7690 [2021-03-10 22:06:28,634 INFO L428 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:28,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:28,635 INFO L82 PathProgramCache]: Analyzing trace with hash -1119701242, now seen corresponding path program 161 times [2021-03-10 22:06:28,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:28,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994315463] [2021-03-10 22:06:28,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:28,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:28,820 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:28,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994315463] [2021-03-10 22:06:28,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932163404] [2021-03-10 22:06:28,820 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:28,873 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:06:28,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:28,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:06:28,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:29,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:29,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:29,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:06:29,552 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:29,556 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:29,556 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:29,561 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:29,562 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:29,565 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:29,566 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:29,570 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:29,571 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:29,717 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 65 [2021-03-10 22:06:29,718 INFO L628 ElimStorePlain]: treesize reduction 466, result has 19.9 percent of original size [2021-03-10 22:06:29,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:06:29,722 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:29,763 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:29,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:06:29,767 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:29,807 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:29,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:06:29,811 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:29,849 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:29,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:06:29,853 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:29,890 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:29,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:06:29,893 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:29,929 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:29,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:06:29,932 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:29,966 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:29,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:06:29,970 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:30,002 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:30,003 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:06:30,003 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 10 variables, input treesize:729, output treesize:68 [2021-03-10 22:06:30,164 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:30,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:30,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-03-10 22:06:30,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130715654] [2021-03-10 22:06:30,164 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:06:30,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:30,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:06:30,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:06:30,164 INFO L87 Difference]: Start difference. First operand 101 states and 207 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:30,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:30,461 INFO L93 Difference]: Finished difference Result 116 states and 235 transitions. [2021-03-10 22:06:30,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:06:30,462 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:06:30,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:30,462 INFO L225 Difference]: With dead ends: 116 [2021-03-10 22:06:30,462 INFO L226 Difference]: Without dead ends: 109 [2021-03-10 22:06:30,462 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 586.5ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:06:30,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-03-10 22:06:30,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 100. [2021-03-10 22:06:30,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.0707070707070705) internal successors, (205), 99 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:30,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 205 transitions. [2021-03-10 22:06:30,463 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 205 transitions. Word has length 18 [2021-03-10 22:06:30,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:30,463 INFO L480 AbstractCegarLoop]: Abstraction has 100 states and 205 transitions. [2021-03-10 22:06:30,463 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:30,464 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 205 transitions. [2021-03-10 22:06:30,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:06:30,464 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:30,464 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:30,678 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7804,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:30,678 INFO L428 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:30,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:30,679 INFO L82 PathProgramCache]: Analyzing trace with hash -1922224996, now seen corresponding path program 162 times [2021-03-10 22:06:30,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:30,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206726844] [2021-03-10 22:06:30,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:30,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:30,845 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:30,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206726844] [2021-03-10 22:06:30,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224662512] [2021-03-10 22:06:30,845 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:30,901 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:06:30,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:30,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:06:30,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:31,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:31,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:31,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:06:31,594 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:31,598 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:31,599 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:31,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:31,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:31,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:06:31,604 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:31,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:31,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:31,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-03-10 22:06:31,609 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:31,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:31,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:31,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:06:31,614 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:31,618 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:31,619 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:31,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:31,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:31,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-03-10 22:06:31,624 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:31,628 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:31,628 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:31,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:31,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:31,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:06:31,633 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:31,636 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:31,637 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:31,640 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:31,641 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:31,644 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:31,644 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:31,703 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-03-10 22:06:31,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:06:31,707 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:31,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:06:31,710 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:31,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:06:31,713 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:31,737 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:31,738 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:06:31,738 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:467, output treesize:52 [2021-03-10 22:06:31,820 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:31,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:31,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-03-10 22:06:31,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092251698] [2021-03-10 22:06:31,820 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:06:31,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:31,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:06:31,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:06:31,820 INFO L87 Difference]: Start difference. First operand 100 states and 205 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:32,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:32,265 INFO L93 Difference]: Finished difference Result 129 states and 259 transitions. [2021-03-10 22:06:32,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:06:32,266 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:06:32,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:32,266 INFO L225 Difference]: With dead ends: 129 [2021-03-10 22:06:32,266 INFO L226 Difference]: Without dead ends: 113 [2021-03-10 22:06:32,266 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 632.9ms TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:06:32,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-03-10 22:06:32,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 102. [2021-03-10 22:06:32,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.0693069306930694) internal successors, (209), 101 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:32,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 209 transitions. [2021-03-10 22:06:32,267 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 209 transitions. Word has length 18 [2021-03-10 22:06:32,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:32,267 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 209 transitions. [2021-03-10 22:06:32,268 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:32,268 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 209 transitions. [2021-03-10 22:06:32,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:06:32,268 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:32,268 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:32,476 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7918,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:32,476 INFO L428 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:32,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:32,476 INFO L82 PathProgramCache]: Analyzing trace with hash 399819232, now seen corresponding path program 163 times [2021-03-10 22:06:32,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:32,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587001592] [2021-03-10 22:06:32,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:32,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:32,649 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:32,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587001592] [2021-03-10 22:06:32,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391657881] [2021-03-10 22:06:32,649 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:32,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:32,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:06:32,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:33,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:33,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:33,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:06:33,376 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:33,380 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:33,381 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:33,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:33,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:33,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-03-10 22:06:33,386 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:33,390 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:33,390 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:33,394 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:33,395 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:33,398 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:33,399 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:33,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:33,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:33,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:06:33,403 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:33,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:33,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:33,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:06:33,408 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:33,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:33,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:33,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:06:33,413 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:33,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:33,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:33,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-03-10 22:06:33,418 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:33,421 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:33,422 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:33,424 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:33,425 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:33,483 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-03-10 22:06:33,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:06:33,486 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:33,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:06:33,490 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:33,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:06:33,493 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:33,516 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:33,519 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:06:33,519 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:467, output treesize:52 [2021-03-10 22:06:33,603 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:33,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:33,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-03-10 22:06:33,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999701577] [2021-03-10 22:06:33,603 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:06:33,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:33,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:06:33,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:06:33,604 INFO L87 Difference]: Start difference. First operand 102 states and 209 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:34,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:34,039 INFO L93 Difference]: Finished difference Result 126 states and 253 transitions. [2021-03-10 22:06:34,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:06:34,040 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:06:34,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:34,040 INFO L225 Difference]: With dead ends: 126 [2021-03-10 22:06:34,040 INFO L226 Difference]: Without dead ends: 113 [2021-03-10 22:06:34,040 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 618.4ms TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:06:34,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-03-10 22:06:34,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 103. [2021-03-10 22:06:34,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.0686274509803924) internal successors, (211), 102 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:34,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 211 transitions. [2021-03-10 22:06:34,041 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 211 transitions. Word has length 18 [2021-03-10 22:06:34,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:34,041 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 211 transitions. [2021-03-10 22:06:34,041 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:34,041 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 211 transitions. [2021-03-10 22:06:34,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:06:34,041 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:34,042 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:34,242 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8023 [2021-03-10 22:06:34,242 INFO L428 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:34,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:34,242 INFO L82 PathProgramCache]: Analyzing trace with hash -79465444, now seen corresponding path program 164 times [2021-03-10 22:06:34,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:34,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242856453] [2021-03-10 22:06:34,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:34,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:34,448 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:34,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242856453] [2021-03-10 22:06:34,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396185838] [2021-03-10 22:06:34,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:34,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:06:34,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:34,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:06:34,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:35,172 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:35,172 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:35,177 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:35,177 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:35,182 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:35,182 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:35,187 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:35,187 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:35,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:35,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:35,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:06:35,193 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:35,198 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:35,198 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:35,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:35,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:35,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:06:35,204 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:35,208 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:35,209 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:35,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:35,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:35,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-03-10 22:06:35,215 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:35,219 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:35,220 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:35,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:35,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:35,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:06:35,230 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:35,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:35,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:35,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-03-10 22:06:35,236 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:35,240 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:35,241 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:35,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:35,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:35,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:06:35,247 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:35,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:35,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:35,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:06:35,252 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:35,256 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:35,257 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:35,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:35,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:35,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:06:35,262 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:35,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:35,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:35,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:06:35,268 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:35,271 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:35,272 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:35,275 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:35,276 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:35,383 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2021-03-10 22:06:35,383 INFO L628 ElimStorePlain]: treesize reduction 18, result has 87.2 percent of original size [2021-03-10 22:06:35,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:06:35,387 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:35,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:06:35,391 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:35,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:06:35,395 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:35,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:06:35,399 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:35,443 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:35,445 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:06:35,445 INFO L247 ElimStorePlain]: Needed 25 recursive calls to eliminate 5 variables, input treesize:891, output treesize:79 [2021-03-10 22:06:35,597 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:35,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:35,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-03-10 22:06:35,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522325342] [2021-03-10 22:06:35,598 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:06:35,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:35,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:06:35,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:06:35,598 INFO L87 Difference]: Start difference. First operand 103 states and 211 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:36,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:36,009 INFO L93 Difference]: Finished difference Result 144 states and 277 transitions. [2021-03-10 22:06:36,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:06:36,009 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:06:36,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:36,009 INFO L225 Difference]: With dead ends: 144 [2021-03-10 22:06:36,009 INFO L226 Difference]: Without dead ends: 125 [2021-03-10 22:06:36,010 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 676.6ms TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:06:36,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-03-10 22:06:36,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 105. [2021-03-10 22:06:36,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.0865384615384617) internal successors, (217), 104 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:36,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 217 transitions. [2021-03-10 22:06:36,011 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 217 transitions. Word has length 18 [2021-03-10 22:06:36,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:36,011 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 217 transitions. [2021-03-10 22:06:36,011 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:36,011 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 217 transitions. [2021-03-10 22:06:36,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:06:36,011 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:36,011 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:36,211 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8133 [2021-03-10 22:06:36,211 INFO L428 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:36,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:36,212 INFO L82 PathProgramCache]: Analyzing trace with hash 987564554, now seen corresponding path program 165 times [2021-03-10 22:06:36,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:36,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753590892] [2021-03-10 22:06:36,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:36,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:36,384 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:36,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753590892] [2021-03-10 22:06:36,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579296649] [2021-03-10 22:06:36,385 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:36,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 22:06:36,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:36,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:06:36,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:36,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:06:36,641 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:36,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:06:36,644 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:36,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:06:36,648 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:36,674 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:36,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:06:36,677 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:36,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:06:36,680 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:36,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:06:36,683 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:36,705 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:36,706 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:06:36,706 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:88, output treesize:52 [2021-03-10 22:06:36,786 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:36,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:36,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-03-10 22:06:36,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644656227] [2021-03-10 22:06:36,803 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:06:36,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:36,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:06:36,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:06:36,803 INFO L87 Difference]: Start difference. First operand 105 states and 217 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:37,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:37,151 INFO L93 Difference]: Finished difference Result 130 states and 263 transitions. [2021-03-10 22:06:37,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:06:37,152 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:06:37,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:37,152 INFO L225 Difference]: With dead ends: 130 [2021-03-10 22:06:37,152 INFO L226 Difference]: Without dead ends: 117 [2021-03-10 22:06:37,152 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 473.6ms TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:06:37,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-03-10 22:06:37,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 107. [2021-03-10 22:06:37,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0849056603773586) internal successors, (221), 106 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:37,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 221 transitions. [2021-03-10 22:06:37,153 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 221 transitions. Word has length 18 [2021-03-10 22:06:37,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:37,153 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 221 transitions. [2021-03-10 22:06:37,153 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:37,153 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 221 transitions. [2021-03-10 22:06:37,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:06:37,153 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:37,154 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:37,354 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8198,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:37,354 INFO L428 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:37,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:37,354 INFO L82 PathProgramCache]: Analyzing trace with hash 508279878, now seen corresponding path program 166 times [2021-03-10 22:06:37,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:37,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435335306] [2021-03-10 22:06:37,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:37,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:37,532 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:37,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435335306] [2021-03-10 22:06:37,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098356017] [2021-03-10 22:06:37,533 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:37,587 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:06:37,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:37,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:06:37,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:37,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:06:37,733 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:37,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:06:37,736 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:37,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:06:37,740 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:37,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:06:37,748 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:37,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:06:37,752 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:37,810 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:37,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:06:37,814 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:37,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:06:37,818 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:37,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:06:37,821 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:37,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:06:37,825 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:37,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:06:37,829 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:37,886 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:37,887 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 22:06:37,887 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 3 variables, input treesize:168, output treesize:100 [2021-03-10 22:06:38,062 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:38,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:38,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-03-10 22:06:38,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882012128] [2021-03-10 22:06:38,063 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:06:38,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:38,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:06:38,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:06:38,063 INFO L87 Difference]: Start difference. First operand 107 states and 221 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:38,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:38,436 INFO L93 Difference]: Finished difference Result 129 states and 261 transitions. [2021-03-10 22:06:38,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:06:38,437 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:06:38,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:38,437 INFO L225 Difference]: With dead ends: 129 [2021-03-10 22:06:38,437 INFO L226 Difference]: Without dead ends: 117 [2021-03-10 22:06:38,437 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 556.9ms TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:06:38,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-03-10 22:06:38,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 106. [2021-03-10 22:06:38,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.085714285714286) internal successors, (219), 105 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:38,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 219 transitions. [2021-03-10 22:06:38,438 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 219 transitions. Word has length 18 [2021-03-10 22:06:38,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:38,438 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 219 transitions. [2021-03-10 22:06:38,438 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:38,438 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 219 transitions. [2021-03-10 22:06:38,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:06:38,439 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:38,439 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:38,639 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8223 [2021-03-10 22:06:38,639 INFO L428 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:38,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:38,639 INFO L82 PathProgramCache]: Analyzing trace with hash -26949924, now seen corresponding path program 167 times [2021-03-10 22:06:38,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:38,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107598330] [2021-03-10 22:06:38,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:38,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:38,801 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:38,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107598330] [2021-03-10 22:06:38,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529761793] [2021-03-10 22:06:38,801 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 22:06:38,857 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 22:06:38,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:38,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:06:38,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:39,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:06:39,053 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:39,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:06:39,056 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:39,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:06:39,060 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:39,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:06:39,064 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:39,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:06:39,068 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:39,137 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:39,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:06:39,141 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:39,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:06:39,144 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:39,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:06:39,148 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:39,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:06:39,152 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:39,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:06:39,155 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:39,205 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:39,206 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 22:06:39,206 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 3 variables, input treesize:168, output treesize:100 [2021-03-10 22:06:39,383 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:39,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:39,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-03-10 22:06:39,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18579650] [2021-03-10 22:06:39,383 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:06:39,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:39,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:06:39,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:06:39,383 INFO L87 Difference]: Start difference. First operand 106 states and 219 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:39,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:39,617 INFO L93 Difference]: Finished difference Result 126 states and 253 transitions. [2021-03-10 22:06:39,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:06:39,618 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:06:39,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:39,618 INFO L225 Difference]: With dead ends: 126 [2021-03-10 22:06:39,618 INFO L226 Difference]: Without dead ends: 114 [2021-03-10 22:06:39,618 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 458.6ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:06:39,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-03-10 22:06:39,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 106. [2021-03-10 22:06:39,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.085714285714286) internal successors, (219), 105 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:39,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 219 transitions. [2021-03-10 22:06:39,619 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 219 transitions. Word has length 18 [2021-03-10 22:06:39,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:39,619 INFO L480 AbstractCegarLoop]: Abstraction has 106 states and 219 transitions. [2021-03-10 22:06:39,619 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:39,619 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 219 transitions. [2021-03-10 22:06:39,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:06:39,620 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:39,620 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:39,820 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8249,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:39,820 INFO L428 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:39,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:39,820 INFO L82 PathProgramCache]: Analyzing trace with hash 260313670, now seen corresponding path program 168 times [2021-03-10 22:06:39,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:39,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623865324] [2021-03-10 22:06:39,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:39,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:40,013 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:40,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623865324] [2021-03-10 22:06:40,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393713214] [2021-03-10 22:06:40,014 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:40,068 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:06:40,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:40,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:06:40,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:40,799 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:40,800 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:40,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:40,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:40,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:06:40,806 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:40,810 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:40,811 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:40,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:40,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:40,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-03-10 22:06:40,817 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:40,820 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:40,821 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:40,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:40,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:40,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-03-10 22:06:40,826 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:40,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:40,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:40,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-03-10 22:06:40,832 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:40,835 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:40,836 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:40,840 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:40,840 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:40,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:40,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:40,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:06:40,851 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:40,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:40,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:40,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:06:40,856 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:40,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:40,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:40,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:06:40,862 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:40,865 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:40,866 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:40,869 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:40,870 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:40,872 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:40,873 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:40,932 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-03-10 22:06:40,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:06:40,936 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:40,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:06:40,939 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:40,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:06:40,943 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:40,966 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:40,967 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:06:40,967 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 4 variables, input treesize:591, output treesize:52 [2021-03-10 22:06:41,056 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:41,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:41,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-03-10 22:06:41,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435317446] [2021-03-10 22:06:41,056 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:06:41,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:41,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:06:41,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:06:41,057 INFO L87 Difference]: Start difference. First operand 106 states and 219 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:41,353 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2021-03-10 22:06:41,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:41,397 INFO L93 Difference]: Finished difference Result 127 states and 252 transitions. [2021-03-10 22:06:41,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:06:41,397 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:06:41,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:41,398 INFO L225 Difference]: With dead ends: 127 [2021-03-10 22:06:41,398 INFO L226 Difference]: Without dead ends: 111 [2021-03-10 22:06:41,398 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 586.8ms TimeCoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:06:41,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-03-10 22:06:41,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 109. [2021-03-10 22:06:41,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.0833333333333335) internal successors, (225), 108 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:41,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 225 transitions. [2021-03-10 22:06:41,399 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 225 transitions. Word has length 18 [2021-03-10 22:06:41,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:41,399 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 225 transitions. [2021-03-10 22:06:41,399 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:41,399 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 225 transitions. [2021-03-10 22:06:41,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:06:41,399 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:41,399 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:41,600 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8283 [2021-03-10 22:06:41,600 INFO L428 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:41,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:41,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1712609398, now seen corresponding path program 169 times [2021-03-10 22:06:41,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:41,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754647115] [2021-03-10 22:06:41,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:41,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:41,784 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:41,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754647115] [2021-03-10 22:06:41,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995433429] [2021-03-10 22:06:41,784 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:41,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:41,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:06:41,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:42,563 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:42,564 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:42,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:42,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:42,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:06:42,569 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:42,573 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:42,574 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:42,577 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:42,578 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:42,582 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:42,582 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:42,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:42,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:42,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-03-10 22:06:42,588 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:42,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:42,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:42,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:06:42,593 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:42,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:42,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:42,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-03-10 22:06:42,598 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:42,602 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:42,602 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:42,606 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:42,606 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:42,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:42,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:42,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:06:42,611 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:42,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:42,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:06:42,615 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:42,674 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-03-10 22:06:42,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:06:42,678 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:42,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:06:42,681 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:42,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:06:42,684 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:42,708 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:42,709 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:06:42,709 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:467, output treesize:52 [2021-03-10 22:06:42,793 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:42,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:42,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-03-10 22:06:42,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071603943] [2021-03-10 22:06:42,793 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:06:42,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:42,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:06:42,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:06:42,794 INFO L87 Difference]: Start difference. First operand 109 states and 225 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:43,049 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2021-03-10 22:06:43,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:43,077 INFO L93 Difference]: Finished difference Result 125 states and 249 transitions. [2021-03-10 22:06:43,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:06:43,078 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:06:43,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:43,078 INFO L225 Difference]: With dead ends: 125 [2021-03-10 22:06:43,078 INFO L226 Difference]: Without dead ends: 112 [2021-03-10 22:06:43,078 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 573.0ms TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:06:43,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-03-10 22:06:43,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 110. [2021-03-10 22:06:43,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.0825688073394497) internal successors, (227), 109 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:43,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 227 transitions. [2021-03-10 22:06:43,079 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 227 transitions. Word has length 18 [2021-03-10 22:06:43,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:43,079 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 227 transitions. [2021-03-10 22:06:43,079 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:43,079 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 227 transitions. [2021-03-10 22:06:43,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:06:43,079 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:43,079 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:43,280 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8467 [2021-03-10 22:06:43,280 INFO L428 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:43,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:43,280 INFO L82 PathProgramCache]: Analyzing trace with hash 2103073222, now seen corresponding path program 170 times [2021-03-10 22:06:43,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:43,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612918025] [2021-03-10 22:06:43,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:43,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:43,532 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:43,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612918025] [2021-03-10 22:06:43,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463973556] [2021-03-10 22:06:43,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:43,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:06:43,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:43,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:06:43,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:44,600 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:44,601 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:44,605 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:44,606 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:44,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:44,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:44,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:06:44,612 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:44,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:44,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:44,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:06:44,618 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:44,622 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:44,623 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:44,627 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:44,627 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:44,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:44,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:44,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:06:44,633 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:44,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:44,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:44,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:06:44,639 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:44,643 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:44,643 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:44,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:44,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:44,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:06:44,649 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:44,652 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:44,653 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:44,657 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:44,657 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:44,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:44,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:44,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-03-10 22:06:44,663 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:44,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:44,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:44,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:06:44,668 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:44,672 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:44,672 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:44,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:44,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-03-10 22:06:44,677 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:44,790 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2021-03-10 22:06:44,791 INFO L628 ElimStorePlain]: treesize reduction 18, result has 87.2 percent of original size [2021-03-10 22:06:44,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:06:44,794 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:44,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:06:44,798 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:44,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:06:44,802 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:44,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:06:44,806 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:44,849 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:44,850 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:06:44,850 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 5 variables, input treesize:709, output treesize:79 [2021-03-10 22:06:44,992 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:44,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:44,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-03-10 22:06:44,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255776407] [2021-03-10 22:06:44,992 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:06:44,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:44,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:06:44,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:06:44,993 INFO L87 Difference]: Start difference. First operand 110 states and 227 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:45,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:45,243 INFO L93 Difference]: Finished difference Result 125 states and 250 transitions. [2021-03-10 22:06:45,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:06:45,243 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:06:45,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:45,244 INFO L225 Difference]: With dead ends: 125 [2021-03-10 22:06:45,244 INFO L226 Difference]: Without dead ends: 113 [2021-03-10 22:06:45,244 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 583.4ms TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:06:45,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-03-10 22:06:45,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 108. [2021-03-10 22:06:45,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.0841121495327104) internal successors, (223), 107 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:45,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 223 transitions. [2021-03-10 22:06:45,245 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 223 transitions. Word has length 18 [2021-03-10 22:06:45,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:45,245 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 223 transitions. [2021-03-10 22:06:45,245 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:45,245 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 223 transitions. [2021-03-10 22:06:45,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:06:45,245 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:45,245 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:45,445 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8577 [2021-03-10 22:06:45,445 INFO L428 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:45,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:45,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1124864076, now seen corresponding path program 171 times [2021-03-10 22:06:45,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:45,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485842121] [2021-03-10 22:06:45,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:45,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:45,620 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:45,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485842121] [2021-03-10 22:06:45,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82359034] [2021-03-10 22:06:45,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:45,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:06:45,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:45,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:06:45,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:45,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:06:45,871 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:45,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:06:45,874 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:45,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:06:45,878 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:45,904 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:45,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:06:45,908 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:45,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:06:45,911 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:45,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:06:45,914 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:45,937 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:45,938 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:06:45,938 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:88, output treesize:52 [2021-03-10 22:06:46,021 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:46,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:46,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-03-10 22:06:46,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521102663] [2021-03-10 22:06:46,021 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:06:46,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:46,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:06:46,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:06:46,027 INFO L87 Difference]: Start difference. First operand 108 states and 223 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:46,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:46,300 INFO L93 Difference]: Finished difference Result 129 states and 257 transitions. [2021-03-10 22:06:46,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:06:46,300 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:06:46,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:46,301 INFO L225 Difference]: With dead ends: 129 [2021-03-10 22:06:46,301 INFO L226 Difference]: Without dead ends: 116 [2021-03-10 22:06:46,301 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 451.9ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:06:46,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-03-10 22:06:46,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 110. [2021-03-10 22:06:46,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.0825688073394497) internal successors, (227), 109 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:46,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 227 transitions. [2021-03-10 22:06:46,302 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 227 transitions. Word has length 18 [2021-03-10 22:06:46,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:46,302 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 227 transitions. [2021-03-10 22:06:46,302 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:46,302 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 227 transitions. [2021-03-10 22:06:46,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:06:46,302 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:46,302 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:46,502 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8690,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:46,503 INFO L428 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:46,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:46,503 INFO L82 PathProgramCache]: Analyzing trace with hash -1604148752, now seen corresponding path program 172 times [2021-03-10 22:06:46,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:46,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505851550] [2021-03-10 22:06:46,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:46,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:46,702 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:46,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505851550] [2021-03-10 22:06:46,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381650373] [2021-03-10 22:06:46,702 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:46,759 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:06:46,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:46,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:06:46,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:46,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:06:46,927 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:46,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:06:46,931 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:46,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:06:46,934 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:46,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:06:46,938 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:46,989 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:46,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:06:46,993 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:46,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:06:46,996 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:46,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:06:47,000 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:47,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:06:47,003 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:47,046 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:47,048 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:06:47,048 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:139, output treesize:83 [2021-03-10 22:06:47,187 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:47,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:47,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-03-10 22:06:47,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984150229] [2021-03-10 22:06:47,187 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:06:47,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:47,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:06:47,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:06:47,188 INFO L87 Difference]: Start difference. First operand 110 states and 227 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:47,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:47,840 INFO L93 Difference]: Finished difference Result 170 states and 332 transitions. [2021-03-10 22:06:47,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:06:47,840 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:06:47,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:47,841 INFO L225 Difference]: With dead ends: 170 [2021-03-10 22:06:47,841 INFO L226 Difference]: Without dead ends: 144 [2021-03-10 22:06:47,841 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 811.0ms TimeCoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:06:47,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-03-10 22:06:47,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 109. [2021-03-10 22:06:47,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.0833333333333335) internal successors, (225), 108 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:47,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 225 transitions. [2021-03-10 22:06:47,842 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 225 transitions. Word has length 18 [2021-03-10 22:06:47,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:47,842 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 225 transitions. [2021-03-10 22:06:47,842 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:47,842 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 225 transitions. [2021-03-10 22:06:47,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:06:47,842 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:47,842 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:48,043 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8712,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:48,043 INFO L428 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:48,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:48,043 INFO L82 PathProgramCache]: Analyzing trace with hash -2139378554, now seen corresponding path program 173 times [2021-03-10 22:06:48,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:48,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703465761] [2021-03-10 22:06:48,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:48,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:48,219 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:48,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703465761] [2021-03-10 22:06:48,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094291461] [2021-03-10 22:06:48,219 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:48,275 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:06:48,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:48,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:06:48,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:48,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:06:48,455 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:48,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:06:48,459 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:48,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:06:48,462 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:48,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:06:48,466 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:48,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:06:48,470 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:48,530 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:48,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:06:48,534 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:48,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:06:48,538 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:48,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:06:48,541 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:48,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:06:48,545 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:48,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:06:48,549 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:48,599 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:48,601 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 22:06:48,601 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 3 variables, input treesize:172, output treesize:104 [2021-03-10 22:06:48,785 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:48,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:48,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-03-10 22:06:48,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449693226] [2021-03-10 22:06:48,786 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:06:48,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:48,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:06:48,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:06:48,786 INFO L87 Difference]: Start difference. First operand 109 states and 225 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:49,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:49,516 INFO L93 Difference]: Finished difference Result 183 states and 354 transitions. [2021-03-10 22:06:49,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:06:49,517 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:06:49,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:49,517 INFO L225 Difference]: With dead ends: 183 [2021-03-10 22:06:49,517 INFO L226 Difference]: Without dead ends: 157 [2021-03-10 22:06:49,517 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 923.8ms TimeCoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:06:49,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-03-10 22:06:49,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 112. [2021-03-10 22:06:49,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.108108108108108) internal successors, (234), 111 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:49,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 234 transitions. [2021-03-10 22:06:49,518 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 234 transitions. Word has length 18 [2021-03-10 22:06:49,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:49,519 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 234 transitions. [2021-03-10 22:06:49,519 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:49,519 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 234 transitions. [2021-03-10 22:06:49,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:06:49,519 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:49,519 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:49,723 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8738,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:49,723 INFO L428 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:49,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:49,723 INFO L82 PathProgramCache]: Analyzing trace with hash -84628278, now seen corresponding path program 174 times [2021-03-10 22:06:49,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:49,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186329234] [2021-03-10 22:06:49,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:49,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:49,950 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:49,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186329234] [2021-03-10 22:06:49,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080035743] [2021-03-10 22:06:49,951 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:50,007 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:06:50,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:50,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:06:50,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:50,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:06:50,181 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:50,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:06:50,184 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:50,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:06:50,188 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:50,215 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:50,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:06:50,218 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:50,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:06:50,221 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:50,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:06:50,225 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:50,247 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:50,248 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:06:50,248 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:84, output treesize:48 [2021-03-10 22:06:50,329 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:50,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:50,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-03-10 22:06:50,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005190880] [2021-03-10 22:06:50,329 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:06:50,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:50,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:06:50,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:06:50,330 INFO L87 Difference]: Start difference. First operand 112 states and 234 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:50,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:50,840 INFO L93 Difference]: Finished difference Result 142 states and 290 transitions. [2021-03-10 22:06:50,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:06:50,840 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:06:50,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:50,841 INFO L225 Difference]: With dead ends: 142 [2021-03-10 22:06:50,841 INFO L226 Difference]: Without dead ends: 129 [2021-03-10 22:06:50,841 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 696.4ms TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:06:50,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-03-10 22:06:50,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 115. [2021-03-10 22:06:50,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.1052631578947367) internal successors, (240), 114 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:50,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 240 transitions. [2021-03-10 22:06:50,842 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 240 transitions. Word has length 18 [2021-03-10 22:06:50,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:50,842 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 240 transitions. [2021-03-10 22:06:50,842 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:50,842 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 240 transitions. [2021-03-10 22:06:50,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:06:50,842 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:50,842 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:51,043 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8768,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:51,043 INFO L428 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:51,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:51,043 INFO L82 PathProgramCache]: Analyzing trace with hash -563912954, now seen corresponding path program 175 times [2021-03-10 22:06:51,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:51,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552719184] [2021-03-10 22:06:51,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:51,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:51,256 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:51,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552719184] [2021-03-10 22:06:51,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181487799] [2021-03-10 22:06:51,256 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:51,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:51,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:06:51,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:51,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:06:51,475 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:51,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:06:51,479 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:51,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:06:51,488 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:51,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:06:51,492 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:51,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:06:51,496 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:51,560 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:51,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:06:51,564 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:51,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:06:51,568 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:51,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:06:51,572 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:51,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:06:51,575 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:51,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:06:51,579 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:51,635 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:51,636 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 22:06:51,636 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 3 variables, input treesize:168, output treesize:100 [2021-03-10 22:06:51,816 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:51,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:51,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-03-10 22:06:51,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226815904] [2021-03-10 22:06:51,817 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:06:51,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:51,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:06:51,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:06:51,817 INFO L87 Difference]: Start difference. First operand 115 states and 240 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:52,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:52,445 INFO L93 Difference]: Finished difference Result 175 states and 345 transitions. [2021-03-10 22:06:52,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:06:52,446 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:06:52,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:52,446 INFO L225 Difference]: With dead ends: 175 [2021-03-10 22:06:52,446 INFO L226 Difference]: Without dead ends: 149 [2021-03-10 22:06:52,446 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 852.7ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:06:52,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-03-10 22:06:52,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 114. [2021-03-10 22:06:52,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.106194690265487) internal successors, (238), 113 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:52,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 238 transitions. [2021-03-10 22:06:52,448 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 238 transitions. Word has length 18 [2021-03-10 22:06:52,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:52,448 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 238 transitions. [2021-03-10 22:06:52,448 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:52,448 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 238 transitions. [2021-03-10 22:06:52,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:06:52,448 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:52,448 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:52,648 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8793 [2021-03-10 22:06:52,648 INFO L428 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:52,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:52,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1099142756, now seen corresponding path program 176 times [2021-03-10 22:06:52,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:52,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038257735] [2021-03-10 22:06:52,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:52,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:52,836 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:52,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038257735] [2021-03-10 22:06:52,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570978848] [2021-03-10 22:06:52,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:52,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:06:52,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:52,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:06:52,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:53,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:06:53,092 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:53,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:06:53,096 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:53,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:06:53,100 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:53,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:06:53,104 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:53,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:06:53,108 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:53,168 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:53,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:06:53,172 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:53,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:06:53,176 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:53,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:06:53,180 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:53,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:06:53,183 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:53,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:06:53,187 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:53,238 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:53,239 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 22:06:53,239 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 3 variables, input treesize:168, output treesize:100 [2021-03-10 22:06:53,420 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:53,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:53,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-03-10 22:06:53,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477036955] [2021-03-10 22:06:53,420 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:06:53,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:53,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:06:53,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:06:53,420 INFO L87 Difference]: Start difference. First operand 114 states and 238 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:54,020 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 36 [2021-03-10 22:06:54,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:54,211 INFO L93 Difference]: Finished difference Result 191 states and 373 transitions. [2021-03-10 22:06:54,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:06:54,212 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:06:54,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:54,212 INFO L225 Difference]: With dead ends: 191 [2021-03-10 22:06:54,212 INFO L226 Difference]: Without dead ends: 165 [2021-03-10 22:06:54,212 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 990.7ms TimeCoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:06:54,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-03-10 22:06:54,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 115. [2021-03-10 22:06:54,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.1228070175438596) internal successors, (242), 114 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:54,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 242 transitions. [2021-03-10 22:06:54,214 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 242 transitions. Word has length 18 [2021-03-10 22:06:54,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:54,214 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 242 transitions. [2021-03-10 22:06:54,214 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:54,214 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 242 transitions. [2021-03-10 22:06:54,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:06:54,214 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:54,214 INFO L519 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:54,419 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8814,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:54,419 INFO L428 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:54,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:54,419 INFO L82 PathProgramCache]: Analyzing trace with hash -1067195803, now seen corresponding path program 177 times [2021-03-10 22:06:54,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:54,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535734112] [2021-03-10 22:06:54,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:54,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:54,485 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:06:54,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535734112] [2021-03-10 22:06:54,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399978640] [2021-03-10 22:06:54,486 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:54,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:06:54,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:54,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 22:06:54,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:54,797 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:54,797 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:54,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:06:54,801 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:54,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:06:54,804 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:54,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:54,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:54,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:06:54,808 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:54,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:06:54,811 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:54,813 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:54,814 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:54,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:54,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:54,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:06:54,818 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:54,819 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:54,820 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:54,858 INFO L628 ElimStorePlain]: treesize reduction 44, result has 42.9 percent of original size [2021-03-10 22:06:54,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:06:54,860 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:54,887 INFO L628 ElimStorePlain]: treesize reduction 1, result has 96.6 percent of original size [2021-03-10 22:06:54,887 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:06:54,887 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 3 variables, input treesize:199, output treesize:12 [2021-03-10 22:06:54,910 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:06:54,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:54,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 22:06:54,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605689152] [2021-03-10 22:06:54,911 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 22:06:54,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:54,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 22:06:54,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-03-10 22:06:54,911 INFO L87 Difference]: Start difference. First operand 115 states and 242 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:55,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:55,075 INFO L93 Difference]: Finished difference Result 148 states and 306 transitions. [2021-03-10 22:06:55,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:06:55,076 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:06:55,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:55,076 INFO L225 Difference]: With dead ends: 148 [2021-03-10 22:06:55,076 INFO L226 Difference]: Without dead ends: 148 [2021-03-10 22:06:55,076 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 162.8ms TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:06:55,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-03-10 22:06:55,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 113. [2021-03-10 22:06:55,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.107142857142857) internal successors, (236), 112 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:55,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 236 transitions. [2021-03-10 22:06:55,077 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 236 transitions. Word has length 18 [2021-03-10 22:06:55,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:55,078 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 236 transitions. [2021-03-10 22:06:55,078 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:55,078 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 236 transitions. [2021-03-10 22:06:55,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:06:55,078 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:55,078 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:55,278 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8841 [2021-03-10 22:06:55,278 INFO L428 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:55,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:55,278 INFO L82 PathProgramCache]: Analyzing trace with hash -511397434, now seen corresponding path program 178 times [2021-03-10 22:06:55,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:55,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164036458] [2021-03-10 22:06:55,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:55,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:55,467 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:55,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164036458] [2021-03-10 22:06:55,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559161268] [2021-03-10 22:06:55,467 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 22:06:55,524 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:06:55,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:55,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:06:55,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:56,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:56,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:56,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:06:56,329 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:56,334 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:56,334 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:56,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:56,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:56,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:06:56,341 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:56,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:56,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:56,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:06:56,347 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:56,352 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:56,352 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:56,357 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:56,357 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:56,362 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:56,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:56,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:06:56,364 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:56,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:56,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:56,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-03-10 22:06:56,370 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:56,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:56,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:56,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-03-10 22:06:56,377 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:56,381 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:56,382 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:56,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:56,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:56,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:06:56,388 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:56,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:56,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:56,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:06:56,394 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:56,398 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:56,399 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:56,403 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:56,404 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:56,408 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:56,408 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:56,412 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:56,412 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:56,534 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 67 [2021-03-10 22:06:56,534 INFO L628 ElimStorePlain]: treesize reduction 18, result has 88.5 percent of original size [2021-03-10 22:06:56,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:06:56,539 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:56,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:06:56,543 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:56,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:06:56,547 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:56,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:06:56,551 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:56,602 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:56,603 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:06:56,603 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 5 variables, input treesize:777, output treesize:89 [2021-03-10 22:06:56,757 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:56,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:56,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-03-10 22:06:56,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400815043] [2021-03-10 22:06:56,757 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:06:56,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:56,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:06:56,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:06:56,758 INFO L87 Difference]: Start difference. First operand 113 states and 236 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:56,876 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 45 [2021-03-10 22:06:56,990 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 45 [2021-03-10 22:06:57,163 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 43 [2021-03-10 22:06:57,572 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2021-03-10 22:06:57,700 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 49 [2021-03-10 22:06:57,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:57,869 INFO L93 Difference]: Finished difference Result 216 states and 418 transitions. [2021-03-10 22:06:57,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 22:06:57,870 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:06:57,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:57,870 INFO L225 Difference]: With dead ends: 216 [2021-03-10 22:06:57,870 INFO L226 Difference]: Without dead ends: 183 [2021-03-10 22:06:57,870 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 1338.1ms TimeCoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2021-03-10 22:06:57,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-03-10 22:06:57,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 117. [2021-03-10 22:06:57,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.1379310344827585) internal successors, (248), 116 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) [2021-03-10 22:06:57,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 248 transitions. [2021-03-10 22:06:57,871 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 248 transitions. Word has length 18 [2021-03-10 22:06:57,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:57,871 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 248 transitions. [2021-03-10 22:06:57,871 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:57,871 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 248 transitions. [2021-03-10 22:06:57,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:06:57,872 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:57,872 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:58,072 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8932,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:58,072 INFO L428 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:58,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:58,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1106952796, now seen corresponding path program 179 times [2021-03-10 22:06:58,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:58,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552890373] [2021-03-10 22:06:58,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:58,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:58,275 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:58,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552890373] [2021-03-10 22:06:58,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621310535] [2021-03-10 22:06:58,275 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:58,331 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:06:58,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:06:58,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:06:58,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:06:59,070 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:59,071 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:59,075 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:59,076 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:59,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:59,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:59,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:06:59,081 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:59,084 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:59,085 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:59,089 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:59,089 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:59,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:59,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:59,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:06:59,094 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:59,098 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:59,099 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:59,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:59,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:59,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-03-10 22:06:59,104 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:59,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:59,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:59,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:06:59,109 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:59,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:59,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:59,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-03-10 22:06:59,114 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:59,117 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:06:59,117 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:59,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:06:59,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:06:59,121 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:59,181 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-03-10 22:06:59,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:06:59,184 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:59,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:06:59,188 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:59,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:06:59,191 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:06:59,215 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:06:59,216 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:06:59,216 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:467, output treesize:52 [2021-03-10 22:06:59,307 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:59,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:06:59,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-03-10 22:06:59,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392099431] [2021-03-10 22:06:59,307 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:06:59,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:06:59,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:06:59,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:06:59,308 INFO L87 Difference]: Start difference. First operand 117 states and 248 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:59,522 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2021-03-10 22:06:59,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:06:59,574 INFO L93 Difference]: Finished difference Result 139 states and 282 transitions. [2021-03-10 22:06:59,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:06:59,574 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:06:59,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:06:59,575 INFO L225 Difference]: With dead ends: 139 [2021-03-10 22:06:59,575 INFO L226 Difference]: Without dead ends: 120 [2021-03-10 22:06:59,575 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 574.1ms TimeCoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:06:59,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-03-10 22:06:59,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 118. [2021-03-10 22:06:59,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.1367521367521367) internal successors, (250), 117 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:59,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 250 transitions. [2021-03-10 22:06:59,576 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 250 transitions. Word has length 18 [2021-03-10 22:06:59,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:06:59,576 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 250 transitions. [2021-03-10 22:06:59,576 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:06:59,576 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 250 transitions. [2021-03-10 22:06:59,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:06:59,576 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:06:59,576 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:06:59,777 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9090,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:06:59,777 INFO L428 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:06:59,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:06:59,777 INFO L82 PathProgramCache]: Analyzing trace with hash 75879832, now seen corresponding path program 180 times [2021-03-10 22:06:59,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:06:59,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408577027] [2021-03-10 22:06:59,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:06:59,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:06:59,983 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:06:59,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408577027] [2021-03-10 22:06:59,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386874579] [2021-03-10 22:06:59,983 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 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 [2021-03-10 22:07:00,041 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:07:00,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:07:00,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:07:00,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:00,664 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:00,665 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:00,669 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:00,670 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:00,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:00,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:00,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:07:00,675 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:00,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:00,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:00,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:07:00,680 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:00,684 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:00,684 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:00,688 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:00,688 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:00,691 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:00,692 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:00,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:00,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:00,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-03-10 22:07:00,697 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:00,700 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:00,701 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:00,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:00,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:00,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-03-10 22:07:00,706 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:00,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:00,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:00,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:07:00,711 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:00,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:00,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:07:00,715 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:00,775 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-03-10 22:07:00,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:07:00,778 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:00,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:07:00,782 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:00,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:07:00,792 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:00,817 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:07:00,818 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:07:00,818 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:467, output treesize:52 [2021-03-10 22:07:00,906 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:00,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:00,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-03-10 22:07:00,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000719807] [2021-03-10 22:07:00,907 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:07:00,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:00,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:07:00,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:07:00,907 INFO L87 Difference]: Start difference. First operand 118 states and 250 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:01,257 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 56 [2021-03-10 22:07:01,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:01,293 INFO L93 Difference]: Finished difference Result 141 states and 287 transitions. [2021-03-10 22:07:01,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:07:01,294 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:07:01,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:01,294 INFO L225 Difference]: With dead ends: 141 [2021-03-10 22:07:01,294 INFO L226 Difference]: Without dead ends: 125 [2021-03-10 22:07:01,294 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 776.2ms TimeCoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:07:01,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-03-10 22:07:01,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 119. [2021-03-10 22:07:01,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.135593220338983) internal successors, (252), 118 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:01,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 252 transitions. [2021-03-10 22:07:01,295 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 252 transitions. Word has length 18 [2021-03-10 22:07:01,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:01,295 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 252 transitions. [2021-03-10 22:07:01,295 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:01,295 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 252 transitions. [2021-03-10 22:07:01,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:07:01,295 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:01,296 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:01,496 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9280,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:01,496 INFO L428 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:01,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:01,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1897043236, now seen corresponding path program 181 times [2021-03-10 22:07:01,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:01,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938987575] [2021-03-10 22:07:01,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:01,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:01,723 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:01,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938987575] [2021-03-10 22:07:01,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605198148] [2021-03-10 22:07:01,723 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 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 [2021-03-10 22:07:01,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:01,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:07:01,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:02,481 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:02,482 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:02,485 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:02,486 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:02,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:02,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:02,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-03-10 22:07:02,492 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:02,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:02,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:02,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:07:02,497 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:02,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:02,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:02,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:07:02,502 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:02,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:02,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:02,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:07:02,507 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:02,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:02,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:02,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-03-10 22:07:02,513 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:02,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:02,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:02,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:07:02,518 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:02,521 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:02,522 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:02,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:02,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:02,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:07:02,527 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:02,530 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:02,531 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:02,534 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:02,535 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:02,538 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:02,538 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:02,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:02,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:02,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-03-10 22:07:02,543 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:02,546 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:02,546 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:02,597 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.1 percent of original size [2021-03-10 22:07:02,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:07:02,601 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:02,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:07:02,604 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:02,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:07:02,607 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:02,627 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:07:02,628 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:07:02,628 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 4 variables, input treesize:558, output treesize:49 [2021-03-10 22:07:02,716 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:02,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:02,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-03-10 22:07:02,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305597943] [2021-03-10 22:07:02,717 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:07:02,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:02,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:07:02,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:07:02,717 INFO L87 Difference]: Start difference. First operand 119 states and 252 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:03,102 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2021-03-10 22:07:03,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:03,210 INFO L93 Difference]: Finished difference Result 143 states and 299 transitions. [2021-03-10 22:07:03,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:07:03,210 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:07:03,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:03,211 INFO L225 Difference]: With dead ends: 143 [2021-03-10 22:07:03,211 INFO L226 Difference]: Without dead ends: 136 [2021-03-10 22:07:03,211 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 782.6ms TimeCoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:07:03,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-03-10 22:07:03,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 120. [2021-03-10 22:07:03,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.142857142857143) internal successors, (255), 119 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:03,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 255 transitions. [2021-03-10 22:07:03,212 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 255 transitions. Word has length 18 [2021-03-10 22:07:03,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:03,212 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 255 transitions. [2021-03-10 22:07:03,212 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:03,212 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 255 transitions. [2021-03-10 22:07:03,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:07:03,212 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:03,212 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:03,412 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9353,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:03,413 INFO L428 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:03,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:03,413 INFO L82 PathProgramCache]: Analyzing trace with hash 1918639384, now seen corresponding path program 182 times [2021-03-10 22:07:03,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:03,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97998107] [2021-03-10 22:07:03,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:03,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:03,627 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:03,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97998107] [2021-03-10 22:07:03,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859677510] [2021-03-10 22:07:03,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:03,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:07:03,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:07:03,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:07:03,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:04,550 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:04,551 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:04,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:04,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:04,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:07:04,557 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:04,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:04,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:04,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-03-10 22:07:04,564 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:04,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:04,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:04,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:07:04,569 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:04,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:04,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:04,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:07:04,575 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:04,579 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:04,580 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:04,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:04,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:04,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:07:04,586 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:04,590 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:04,590 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:04,594 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:04,595 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:04,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:04,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:04,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-03-10 22:07:04,601 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:04,606 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:04,606 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:04,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:04,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:04,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:07:04,612 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:04,616 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:04,617 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:04,621 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:04,621 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:04,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:04,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:04,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:07:04,627 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:04,630 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:04,631 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:04,744 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 64 [2021-03-10 22:07:04,744 INFO L628 ElimStorePlain]: treesize reduction 18, result has 87.2 percent of original size [2021-03-10 22:07:04,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:07:04,748 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:04,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:07:04,752 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:04,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:07:04,756 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:04,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:07:04,760 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:04,804 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:07:04,805 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:07:04,805 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 5 variables, input treesize:709, output treesize:79 [2021-03-10 22:07:04,956 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:04,957 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:04,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-03-10 22:07:04,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785984633] [2021-03-10 22:07:04,957 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:07:04,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:04,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:07:04,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:07:04,957 INFO L87 Difference]: Start difference. First operand 120 states and 255 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:05,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:05,523 INFO L93 Difference]: Finished difference Result 167 states and 331 transitions. [2021-03-10 22:07:05,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:07:05,523 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:07:05,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:05,523 INFO L225 Difference]: With dead ends: 167 [2021-03-10 22:07:05,523 INFO L226 Difference]: Without dead ends: 148 [2021-03-10 22:07:05,524 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 780.5ms TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:07:05,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-03-10 22:07:05,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 120. [2021-03-10 22:07:05,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.142857142857143) internal successors, (255), 119 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:05,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 255 transitions. [2021-03-10 22:07:05,525 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 255 transitions. Word has length 18 [2021-03-10 22:07:05,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:05,525 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 255 transitions. [2021-03-10 22:07:05,525 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:05,525 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 255 transitions. [2021-03-10 22:07:05,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:07:05,525 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:05,525 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:05,725 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9431 [2021-03-10 22:07:05,725 INFO L428 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:05,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:05,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1116115630, now seen corresponding path program 183 times [2021-03-10 22:07:05,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:05,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575561734] [2021-03-10 22:07:05,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:05,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:05,989 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:05,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575561734] [2021-03-10 22:07:05,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934544155] [2021-03-10 22:07:05,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 22:07:06,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:07:06,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:07:06,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:07:06,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:06,705 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:06,706 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:06,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:06,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:06,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:07:06,711 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:06,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:06,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:06,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-03-10 22:07:06,717 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:06,721 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:06,721 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:06,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:06,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:06,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:07:06,726 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:06,730 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:06,731 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:06,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:06,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:06,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:07:06,736 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:06,739 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:06,740 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:06,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:06,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:06,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-03-10 22:07:06,745 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:06,747 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:06,748 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:06,751 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:06,752 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:06,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:06,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:07:06,756 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:06,816 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-03-10 22:07:06,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:07:06,819 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:06,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:07:06,823 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:06,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:07:06,826 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:06,850 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:07:06,851 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:07:06,851 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:467, output treesize:52 [2021-03-10 22:07:06,940 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:06,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:06,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-03-10 22:07:06,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054274626] [2021-03-10 22:07:06,940 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:07:06,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:06,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:07:06,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:07:06,940 INFO L87 Difference]: Start difference. First operand 120 states and 255 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:07,192 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2021-03-10 22:07:07,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:07,230 INFO L93 Difference]: Finished difference Result 140 states and 286 transitions. [2021-03-10 22:07:07,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:07:07,231 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:07:07,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:07,231 INFO L225 Difference]: With dead ends: 140 [2021-03-10 22:07:07,231 INFO L226 Difference]: Without dead ends: 124 [2021-03-10 22:07:07,231 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 641.8ms TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:07:07,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-03-10 22:07:07,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 122. [2021-03-10 22:07:07,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.1404958677685952) internal successors, (259), 121 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:07,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 259 transitions. [2021-03-10 22:07:07,232 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 259 transitions. Word has length 18 [2021-03-10 22:07:07,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:07,232 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 259 transitions. [2021-03-10 22:07:07,232 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:07,232 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 259 transitions. [2021-03-10 22:07:07,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:07:07,233 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:07,233 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:07,433 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9664 [2021-03-10 22:07:07,433 INFO L428 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:07,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:07,433 INFO L82 PathProgramCache]: Analyzing trace with hash -856807438, now seen corresponding path program 184 times [2021-03-10 22:07:07,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:07,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204819549] [2021-03-10 22:07:07,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:07,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:07,620 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:07,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204819549] [2021-03-10 22:07:07,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623404936] [2021-03-10 22:07:07,620 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:07,678 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:07:07,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:07:07,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:07:07,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:08,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:08,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:08,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:07:08,329 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:08,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:08,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:08,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-03-10 22:07:08,335 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:08,339 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:08,340 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:08,344 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:08,344 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:08,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:08,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:08,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-03-10 22:07:08,349 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:08,353 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:08,354 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:08,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:08,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:08,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-03-10 22:07:08,359 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:08,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:08,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:08,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:07:08,364 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:08,367 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:08,368 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:08,371 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:08,372 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:08,375 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:08,376 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:08,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:08,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:08,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:07:08,381 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:08,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:08,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:08,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:07:08,386 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:08,389 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:08,390 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:08,393 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:08,393 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:08,454 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-03-10 22:07:08,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:07:08,457 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:08,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:07:08,461 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:08,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:07:08,464 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:08,488 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:07:08,489 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:07:08,489 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 4 variables, input treesize:591, output treesize:52 [2021-03-10 22:07:08,572 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:08,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:08,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-03-10 22:07:08,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109207953] [2021-03-10 22:07:08,572 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:07:08,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:08,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:07:08,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:07:08,573 INFO L87 Difference]: Start difference. First operand 122 states and 259 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:08,912 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2021-03-10 22:07:08,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:08,996 INFO L93 Difference]: Finished difference Result 146 states and 303 transitions. [2021-03-10 22:07:08,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:07:08,997 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:07:08,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:08,997 INFO L225 Difference]: With dead ends: 146 [2021-03-10 22:07:08,997 INFO L226 Difference]: Without dead ends: 133 [2021-03-10 22:07:08,997 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 725.9ms TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:07:08,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-03-10 22:07:08,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 123. [2021-03-10 22:07:08,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 2.139344262295082) internal successors, (261), 122 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:08,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 261 transitions. [2021-03-10 22:07:08,999 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 261 transitions. Word has length 18 [2021-03-10 22:07:08,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:08,999 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 261 transitions. [2021-03-10 22:07:08,999 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:08,999 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 261 transitions. [2021-03-10 22:07:08,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:07:08,999 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:08,999 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:09,199 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9806 [2021-03-10 22:07:09,199 INFO L428 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:09,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:09,199 INFO L82 PathProgramCache]: Analyzing trace with hash -1336092114, now seen corresponding path program 185 times [2021-03-10 22:07:09,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:09,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266363545] [2021-03-10 22:07:09,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:09,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:09,396 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:09,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266363545] [2021-03-10 22:07:09,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133537348] [2021-03-10 22:07:09,396 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:09,453 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:07:09,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:07:09,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:07:09,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:10,397 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:10,398 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:10,402 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:10,403 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:10,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:10,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:10,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:07:10,409 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:10,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:10,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:10,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:07:10,416 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:10,421 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:10,421 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:10,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:10,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:10,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:07:10,428 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:10,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:10,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:10,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-03-10 22:07:10,434 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:10,438 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:10,439 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:10,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:10,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:10,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-03-10 22:07:10,445 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:10,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:10,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:10,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-03-10 22:07:10,451 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:10,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:10,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:10,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:07:10,457 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:10,462 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:10,462 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:10,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:10,467 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:10,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:07:10,468 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:10,473 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:10,473 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:10,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:10,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:10,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:07:10,479 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:10,483 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:10,484 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:10,488 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:10,488 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:10,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:10,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:10,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:07:10,494 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:10,498 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:10,498 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:10,502 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:10,503 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:10,648 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 68 [2021-03-10 22:07:10,648 INFO L628 ElimStorePlain]: treesize reduction 24, result has 86.4 percent of original size [2021-03-10 22:07:10,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:07:10,653 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:10,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:07:10,657 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:10,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:07:10,661 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:10,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:07:10,665 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:10,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:07:10,669 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:10,727 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:07:10,729 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 22:07:10,729 INFO L247 ElimStorePlain]: Needed 26 recursive calls to eliminate 5 variables, input treesize:897, output treesize:100 [2021-03-10 22:07:10,920 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:10,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:10,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-03-10 22:07:10,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636708164] [2021-03-10 22:07:10,921 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:07:10,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:10,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:07:10,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:07:10,921 INFO L87 Difference]: Start difference. First operand 123 states and 261 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:11,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:11,337 INFO L93 Difference]: Finished difference Result 145 states and 301 transitions. [2021-03-10 22:07:11,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:07:11,338 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:07:11,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:11,338 INFO L225 Difference]: With dead ends: 145 [2021-03-10 22:07:11,338 INFO L226 Difference]: Without dead ends: 133 [2021-03-10 22:07:11,338 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 654.6ms TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:07:11,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-03-10 22:07:11,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 121. [2021-03-10 22:07:11,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.1416666666666666) internal successors, (257), 120 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:11,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 257 transitions. [2021-03-10 22:07:11,340 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 257 transitions. Word has length 18 [2021-03-10 22:07:11,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:11,340 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 257 transitions. [2021-03-10 22:07:11,340 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:11,340 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 257 transitions. [2021-03-10 22:07:11,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:07:11,340 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:11,340 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:11,554 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9936,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:11,555 INFO L428 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:11,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:11,555 INFO L82 PathProgramCache]: Analyzing trace with hash -269062116, now seen corresponding path program 186 times [2021-03-10 22:07:11,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:11,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674331101] [2021-03-10 22:07:11,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:11,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:11,749 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:11,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674331101] [2021-03-10 22:07:11,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910107805] [2021-03-10 22:07:11,749 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 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 [2021-03-10 22:07:11,808 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 22:07:11,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:07:11,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:07:11,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:12,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:07:12,043 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:12,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:07:12,047 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:12,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:07:12,050 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:12,077 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:07:12,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:07:12,081 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:12,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:07:12,084 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:12,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:07:12,087 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:12,116 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:07:12,117 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:07:12,117 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:88, output treesize:52 [2021-03-10 22:07:12,204 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:12,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:12,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-03-10 22:07:12,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41178722] [2021-03-10 22:07:12,204 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:07:12,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:12,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:07:12,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:07:12,205 INFO L87 Difference]: Start difference. First operand 121 states and 257 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:12,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:12,524 INFO L93 Difference]: Finished difference Result 146 states and 303 transitions. [2021-03-10 22:07:12,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:07:12,525 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:07:12,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:12,525 INFO L225 Difference]: With dead ends: 146 [2021-03-10 22:07:12,525 INFO L226 Difference]: Without dead ends: 133 [2021-03-10 22:07:12,526 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 530.4ms TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:07:12,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-03-10 22:07:12,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 123. [2021-03-10 22:07:12,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 2.139344262295082) internal successors, (261), 122 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:12,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 261 transitions. [2021-03-10 22:07:12,527 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 261 transitions. Word has length 18 [2021-03-10 22:07:12,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:12,527 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 261 transitions. [2021-03-10 22:07:12,527 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:12,527 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 261 transitions. [2021-03-10 22:07:12,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:07:12,527 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:12,527 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:12,731 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10224,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:12,731 INFO L428 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:12,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:12,731 INFO L82 PathProgramCache]: Analyzing trace with hash -748346792, now seen corresponding path program 187 times [2021-03-10 22:07:12,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:12,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989472503] [2021-03-10 22:07:12,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:12,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:12,917 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:12,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989472503] [2021-03-10 22:07:12,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93927081] [2021-03-10 22:07:12,917 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:12,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:12,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:07:12,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:13,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:07:13,171 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:13,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:07:13,175 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:13,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:07:13,179 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:13,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:07:13,182 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:13,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:07:13,186 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:13,291 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2021-03-10 22:07:13,291 INFO L628 ElimStorePlain]: treesize reduction 28, result has 80.7 percent of original size [2021-03-10 22:07:13,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:07:13,295 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:13,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:07:13,299 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:13,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:07:13,302 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:13,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:07:13,306 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:13,350 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:07:13,351 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:07:13,351 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 3 variables, input treesize:167, output treesize:79 [2021-03-10 22:07:13,502 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:13,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:13,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-03-10 22:07:13,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616695082] [2021-03-10 22:07:13,503 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:07:13,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:13,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:07:13,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:07:13,503 INFO L87 Difference]: Start difference. First operand 123 states and 261 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:13,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:13,899 INFO L93 Difference]: Finished difference Result 164 states and 327 transitions. [2021-03-10 22:07:13,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:07:13,899 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:07:13,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:13,900 INFO L225 Difference]: With dead ends: 164 [2021-03-10 22:07:13,900 INFO L226 Difference]: Without dead ends: 145 [2021-03-10 22:07:13,900 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 584.7ms TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:07:13,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-03-10 22:07:13,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 122. [2021-03-10 22:07:13,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.1404958677685952) internal successors, (259), 121 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:13,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 259 transitions. [2021-03-10 22:07:13,901 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 259 transitions. Word has length 18 [2021-03-10 22:07:13,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:13,901 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 259 transitions. [2021-03-10 22:07:13,901 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:13,901 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 259 transitions. [2021-03-10 22:07:13,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:07:13,901 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:13,901 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:14,107 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10258 [2021-03-10 22:07:14,107 INFO L428 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:14,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:14,107 INFO L82 PathProgramCache]: Analyzing trace with hash -1283576594, now seen corresponding path program 188 times [2021-03-10 22:07:14,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:14,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474834854] [2021-03-10 22:07:14,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:14,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:14,309 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:14,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474834854] [2021-03-10 22:07:14,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360214021] [2021-03-10 22:07:14,309 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:14,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:07:14,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:07:14,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:07:14,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:14,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:07:14,561 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:14,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:07:14,566 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:14,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:07:14,572 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:14,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:07:14,577 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:14,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:07:14,582 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:14,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:07:14,588 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:14,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:07:14,592 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:14,769 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2021-03-10 22:07:14,769 INFO L628 ElimStorePlain]: treesize reduction 30, result has 85.4 percent of original size [2021-03-10 22:07:14,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:07:14,774 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:14,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:07:14,778 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:14,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:07:14,783 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:14,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:07:14,787 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:14,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:07:14,791 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:14,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:07:14,795 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:14,857 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:07:14,859 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-03-10 22:07:14,859 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 3 variables, input treesize:241, output treesize:125 [2021-03-10 22:07:15,052 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:15,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:15,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-03-10 22:07:15,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59938769] [2021-03-10 22:07:15,053 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:07:15,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:15,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:07:15,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:07:15,053 INFO L87 Difference]: Start difference. First operand 122 states and 259 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:15,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:15,823 INFO L93 Difference]: Finished difference Result 196 states and 388 transitions. [2021-03-10 22:07:15,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:07:15,824 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:07:15,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:15,824 INFO L225 Difference]: With dead ends: 196 [2021-03-10 22:07:15,824 INFO L226 Difference]: Without dead ends: 170 [2021-03-10 22:07:15,824 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 955.2ms TimeCoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:07:15,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-03-10 22:07:15,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 122. [2021-03-10 22:07:15,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.1404958677685952) internal successors, (259), 121 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:15,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 259 transitions. [2021-03-10 22:07:15,826 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 259 transitions. Word has length 18 [2021-03-10 22:07:15,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:15,826 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 259 transitions. [2021-03-10 22:07:15,826 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:15,826 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 259 transitions. [2021-03-10 22:07:15,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:07:15,826 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:15,826 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:16,026 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10297,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:16,026 INFO L428 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:16,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:16,027 INFO L82 PathProgramCache]: Analyzing trace with hash -996313000, now seen corresponding path program 189 times [2021-03-10 22:07:16,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:16,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988124894] [2021-03-10 22:07:16,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:16,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:16,282 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:16,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988124894] [2021-03-10 22:07:16,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853624881] [2021-03-10 22:07:16,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:16,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:07:16,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:07:16,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 22:07:16,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:17,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:17,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:17,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-03-10 22:07:17,191 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:17,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:17,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:17,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:07:17,197 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:17,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:17,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:17,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-03-10 22:07:17,203 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:17,207 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:17,208 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:17,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:17,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:17,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:07:17,213 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:17,217 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:17,218 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:17,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:17,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:17,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-03-10 22:07:17,223 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:17,227 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:17,228 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:17,231 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:17,232 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:17,235 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:17,236 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:17,239 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:17,240 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:17,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:17,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:17,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:07:17,245 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:17,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:17,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:17,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:07:17,250 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:17,253 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:17,254 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:17,257 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:17,258 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:17,319 INFO L628 ElimStorePlain]: treesize reduction 17, result has 81.9 percent of original size [2021-03-10 22:07:17,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:07:17,323 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:17,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:07:17,326 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:17,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:07:17,329 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:17,353 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:07:17,354 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:07:17,355 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 4 variables, input treesize:606, output treesize:52 [2021-03-10 22:07:17,438 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:17,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:17,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-03-10 22:07:17,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159887302] [2021-03-10 22:07:17,439 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:07:17,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:17,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:07:17,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:07:17,439 INFO L87 Difference]: Start difference. First operand 122 states and 259 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:17,755 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2021-03-10 22:07:17,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:17,883 INFO L93 Difference]: Finished difference Result 152 states and 315 transitions. [2021-03-10 22:07:17,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:07:17,883 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:07:17,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:17,883 INFO L225 Difference]: With dead ends: 152 [2021-03-10 22:07:17,883 INFO L226 Difference]: Without dead ends: 136 [2021-03-10 22:07:17,884 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 754.0ms TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:07:17,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-03-10 22:07:17,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 125. [2021-03-10 22:07:17,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 2.1370967741935485) internal successors, (265), 124 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:17,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 265 transitions. [2021-03-10 22:07:17,885 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 265 transitions. Word has length 18 [2021-03-10 22:07:17,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:17,885 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 265 transitions. [2021-03-10 22:07:17,885 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:17,885 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 265 transitions. [2021-03-10 22:07:17,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:07:17,885 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:17,885 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:18,085 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10321 [2021-03-10 22:07:18,085 INFO L428 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:18,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:18,086 INFO L82 PathProgramCache]: Analyzing trace with hash 1325731228, now seen corresponding path program 190 times [2021-03-10 22:07:18,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:18,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769736279] [2021-03-10 22:07:18,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:18,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:18,330 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:18,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769736279] [2021-03-10 22:07:18,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124429786] [2021-03-10 22:07:18,330 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:18,395 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:07:18,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:07:18,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:07:18,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:19,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:19,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:19,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-03-10 22:07:19,103 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:19,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:19,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:19,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:07:19,108 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:19,112 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:19,112 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:19,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:19,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:19,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-03-10 22:07:19,118 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:19,122 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:19,122 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:19,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:19,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:19,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:07:19,128 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:19,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:19,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:19,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:07:19,133 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:19,136 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:19,137 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:19,140 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:19,141 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:19,144 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:19,145 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:19,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:19,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:19,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:07:19,150 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:19,153 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:19,154 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:19,215 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-03-10 22:07:19,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:07:19,218 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:19,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:07:19,222 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:19,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:07:19,225 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:19,250 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:07:19,251 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:07:19,251 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:467, output treesize:52 [2021-03-10 22:07:19,334 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:19,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:19,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-03-10 22:07:19,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732968606] [2021-03-10 22:07:19,335 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:07:19,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:19,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:07:19,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:07:19,335 INFO L87 Difference]: Start difference. First operand 125 states and 265 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:19,657 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2021-03-10 22:07:19,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:19,753 INFO L93 Difference]: Finished difference Result 149 states and 309 transitions. [2021-03-10 22:07:19,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:07:19,753 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:07:19,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:19,753 INFO L225 Difference]: With dead ends: 149 [2021-03-10 22:07:19,753 INFO L226 Difference]: Without dead ends: 136 [2021-03-10 22:07:19,753 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 761.2ms TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:07:19,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-03-10 22:07:19,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 126. [2021-03-10 22:07:19,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.136) internal successors, (267), 125 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:19,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 267 transitions. [2021-03-10 22:07:19,755 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 267 transitions. Word has length 18 [2021-03-10 22:07:19,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:19,755 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 267 transitions. [2021-03-10 22:07:19,755 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:19,755 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 267 transitions. [2021-03-10 22:07:19,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:07:19,755 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:19,755 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:19,969 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10538,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:19,970 INFO L428 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:19,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:19,970 INFO L82 PathProgramCache]: Analyzing trace with hash 846446552, now seen corresponding path program 191 times [2021-03-10 22:07:19,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:19,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700211387] [2021-03-10 22:07:19,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:19,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:20,222 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:20,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700211387] [2021-03-10 22:07:20,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806486822] [2021-03-10 22:07:20,223 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:20,283 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 22:07:20,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:07:20,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:07:20,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:21,229 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:21,230 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:21,235 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:21,236 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:21,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:21,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:21,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:07:21,242 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:21,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:21,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:21,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:07:21,248 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:21,252 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:21,253 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:21,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:21,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:21,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-03-10 22:07:21,259 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:21,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:21,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:21,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:07:21,265 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:21,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:21,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:21,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:07:21,271 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:21,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:21,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:21,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:07:21,277 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:21,281 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:21,281 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:21,285 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:21,286 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:21,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:21,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:21,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-03-10 22:07:21,292 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:21,296 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:21,296 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:21,300 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:21,301 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:21,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:21,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:21,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:07:21,306 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:21,310 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:21,311 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:21,420 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 64 [2021-03-10 22:07:21,420 INFO L628 ElimStorePlain]: treesize reduction 18, result has 87.2 percent of original size [2021-03-10 22:07:21,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:07:21,425 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:21,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:07:21,429 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:21,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:07:21,432 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:21,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:07:21,436 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:21,482 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:07:21,484 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:07:21,484 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 5 variables, input treesize:709, output treesize:79 [2021-03-10 22:07:21,639 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:21,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:21,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-03-10 22:07:21,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850626478] [2021-03-10 22:07:21,639 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:07:21,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:21,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:07:21,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:07:21,640 INFO L87 Difference]: Start difference. First operand 126 states and 267 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:21,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:21,912 INFO L93 Difference]: Finished difference Result 141 states and 290 transitions. [2021-03-10 22:07:21,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:07:21,912 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:07:21,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:21,912 INFO L225 Difference]: With dead ends: 141 [2021-03-10 22:07:21,912 INFO L226 Difference]: Without dead ends: 129 [2021-03-10 22:07:21,913 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 584.3ms TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:07:21,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-03-10 22:07:21,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 124. [2021-03-10 22:07:21,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.138211382113821) internal successors, (263), 123 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:21,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 263 transitions. [2021-03-10 22:07:21,914 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 263 transitions. Word has length 18 [2021-03-10 22:07:21,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:21,914 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 263 transitions. [2021-03-10 22:07:21,914 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:21,914 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 263 transitions. [2021-03-10 22:07:21,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:07:21,914 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:21,914 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:22,114 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10677,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:22,114 INFO L428 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:22,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:22,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1913476550, now seen corresponding path program 192 times [2021-03-10 22:07:22,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:22,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513932693] [2021-03-10 22:07:22,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:22,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:22,310 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:22,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513932693] [2021-03-10 22:07:22,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314031] [2021-03-10 22:07:22,310 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 22:07:22,375 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:07:22,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:07:22,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:07:22,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:22,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:07:22,626 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:22,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:07:22,630 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:22,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:07:22,633 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:22,661 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:07:22,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:07:22,664 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:22,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:07:22,667 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:22,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:07:22,671 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:22,694 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:07:22,695 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:07:22,695 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:88, output treesize:52 [2021-03-10 22:07:22,779 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:22,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:22,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-03-10 22:07:22,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110723998] [2021-03-10 22:07:22,779 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:07:22,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:22,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:07:22,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:07:22,780 INFO L87 Difference]: Start difference. First operand 124 states and 263 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:23,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:23,070 INFO L93 Difference]: Finished difference Result 145 states and 297 transitions. [2021-03-10 22:07:23,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:07:23,070 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:07:23,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:23,071 INFO L225 Difference]: With dead ends: 145 [2021-03-10 22:07:23,071 INFO L226 Difference]: Without dead ends: 132 [2021-03-10 22:07:23,071 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 546.5ms TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:07:23,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-03-10 22:07:23,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 126. [2021-03-10 22:07:23,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.136) internal successors, (267), 125 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:23,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 267 transitions. [2021-03-10 22:07:23,072 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 267 transitions. Word has length 18 [2021-03-10 22:07:23,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:23,072 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 267 transitions. [2021-03-10 22:07:23,072 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:23,072 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 267 transitions. [2021-03-10 22:07:23,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:07:23,072 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:23,072 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:23,273 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10782 [2021-03-10 22:07:23,273 INFO L428 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:23,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:23,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1434191874, now seen corresponding path program 193 times [2021-03-10 22:07:23,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:23,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559206321] [2021-03-10 22:07:23,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:23,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:23,459 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:23,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559206321] [2021-03-10 22:07:23,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532959127] [2021-03-10 22:07:23,460 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:23,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:23,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:07:23,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:23,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:07:23,731 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:23,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:07:23,735 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:23,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:07:23,739 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:23,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:07:23,744 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:23,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:07:23,748 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:23,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:07:23,752 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:23,754 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:23,755 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:23,832 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:07:23,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:07:23,836 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:23,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:07:23,840 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:23,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:07:23,844 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:23,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:07:23,848 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:23,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:07:23,852 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:23,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:07:23,856 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:23,922 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:07:23,923 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-03-10 22:07:23,924 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 3 variables, input treesize:239, output treesize:121 [2021-03-10 22:07:24,117 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:24,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:24,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-03-10 22:07:24,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943012253] [2021-03-10 22:07:24,117 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:07:24,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:24,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:07:24,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:07:24,118 INFO L87 Difference]: Start difference. First operand 126 states and 267 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:24,462 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 36 [2021-03-10 22:07:24,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:24,544 INFO L93 Difference]: Finished difference Result 148 states and 307 transitions. [2021-03-10 22:07:24,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:07:24,544 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:07:24,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:24,545 INFO L225 Difference]: With dead ends: 148 [2021-03-10 22:07:24,545 INFO L226 Difference]: Without dead ends: 136 [2021-03-10 22:07:24,545 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 666.5ms TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:07:24,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-03-10 22:07:24,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 125. [2021-03-10 22:07:24,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 2.1370967741935485) internal successors, (265), 124 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:24,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 265 transitions. [2021-03-10 22:07:24,546 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 265 transitions. Word has length 18 [2021-03-10 22:07:24,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:24,546 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 265 transitions. [2021-03-10 22:07:24,546 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:24,546 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 265 transitions. [2021-03-10 22:07:24,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:07:24,546 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:24,546 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:24,747 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10808 [2021-03-10 22:07:24,747 INFO L428 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:24,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:24,747 INFO L82 PathProgramCache]: Analyzing trace with hash 898962072, now seen corresponding path program 194 times [2021-03-10 22:07:24,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:24,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616040787] [2021-03-10 22:07:24,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:24,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:24,952 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:24,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616040787] [2021-03-10 22:07:24,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313264533] [2021-03-10 22:07:24,952 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:25,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:07:25,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:07:25,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:07:25,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:25,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:07:25,154 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:25,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:07:25,158 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:25,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:07:25,162 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:25,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:07:25,166 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:25,219 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:07:25,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:07:25,223 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:25,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:07:25,227 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:25,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:07:25,230 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:25,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:07:25,234 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:25,280 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:07:25,281 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:07:25,281 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:135, output treesize:79 [2021-03-10 22:07:25,436 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:25,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:25,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-03-10 22:07:25,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431764019] [2021-03-10 22:07:25,436 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:07:25,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:25,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:07:25,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:07:25,437 INFO L87 Difference]: Start difference. First operand 125 states and 265 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:26,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:26,191 INFO L93 Difference]: Finished difference Result 199 states and 394 transitions. [2021-03-10 22:07:26,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:07:26,191 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:07:26,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:26,191 INFO L225 Difference]: With dead ends: 199 [2021-03-10 22:07:26,191 INFO L226 Difference]: Without dead ends: 173 [2021-03-10 22:07:26,191 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 913.2ms TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:07:26,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-03-10 22:07:26,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 125. [2021-03-10 22:07:26,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 2.1370967741935485) internal successors, (265), 124 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:26,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 265 transitions. [2021-03-10 22:07:26,193 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 265 transitions. Word has length 18 [2021-03-10 22:07:26,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:26,193 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 265 transitions. [2021-03-10 22:07:26,193 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:26,193 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 265 transitions. [2021-03-10 22:07:26,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:07:26,193 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:26,193 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:26,393 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10840 [2021-03-10 22:07:26,393 INFO L428 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:26,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:26,394 INFO L82 PathProgramCache]: Analyzing trace with hash -1341254948, now seen corresponding path program 195 times [2021-03-10 22:07:26,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:26,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397166566] [2021-03-10 22:07:26,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:26,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:26,587 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:26,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397166566] [2021-03-10 22:07:26,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404342313] [2021-03-10 22:07:26,587 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 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 [2021-03-10 22:07:26,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:07:26,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:07:26,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:07:26,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:26,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:07:26,845 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:26,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:07:26,849 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:26,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:07:26,852 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:26,881 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:07:26,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:07:26,884 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:26,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:07:26,888 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:26,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:07:26,891 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:26,915 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:07:26,915 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:07:26,916 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:88, output treesize:52 [2021-03-10 22:07:26,999 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:26,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:26,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-03-10 22:07:26,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698948117] [2021-03-10 22:07:26,999 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:07:26,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:26,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:07:26,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:07:26,999 INFO L87 Difference]: Start difference. First operand 125 states and 265 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:27,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:27,324 INFO L93 Difference]: Finished difference Result 151 states and 313 transitions. [2021-03-10 22:07:27,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:07:27,324 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:07:27,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:27,325 INFO L225 Difference]: With dead ends: 151 [2021-03-10 22:07:27,325 INFO L226 Difference]: Without dead ends: 138 [2021-03-10 22:07:27,325 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 531.6ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:07:27,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-03-10 22:07:27,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 128. [2021-03-10 22:07:27,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.1338582677165356) internal successors, (271), 127 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) [2021-03-10 22:07:27,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 271 transitions. [2021-03-10 22:07:27,326 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 271 transitions. Word has length 18 [2021-03-10 22:07:27,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:27,326 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 271 transitions. [2021-03-10 22:07:27,326 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:27,326 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 271 transitions. [2021-03-10 22:07:27,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:07:27,326 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:27,326 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:27,526 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10864 [2021-03-10 22:07:27,527 INFO L428 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:27,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:27,527 INFO L82 PathProgramCache]: Analyzing trace with hash -1820539624, now seen corresponding path program 196 times [2021-03-10 22:07:27,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:27,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691450193] [2021-03-10 22:07:27,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:27,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:27,735 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:27,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691450193] [2021-03-10 22:07:27,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126447184] [2021-03-10 22:07:27,736 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:27,794 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:07:27,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:07:27,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:07:27,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:28,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:07:28,021 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:28,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:07:28,025 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:28,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:07:28,029 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:28,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:07:28,033 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:28,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:07:28,037 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:28,099 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:07:28,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:07:28,103 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:28,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:07:28,107 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:28,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:07:28,111 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:28,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:07:28,115 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:28,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:07:28,118 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:28,171 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:07:28,172 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 22:07:28,172 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 3 variables, input treesize:172, output treesize:104 [2021-03-10 22:07:28,360 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:28,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:28,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-03-10 22:07:28,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345267434] [2021-03-10 22:07:28,361 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:07:28,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:28,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:07:28,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:07:28,361 INFO L87 Difference]: Start difference. First operand 128 states and 271 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:28,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:28,759 INFO L93 Difference]: Finished difference Result 169 states and 337 transitions. [2021-03-10 22:07:28,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:07:28,759 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:07:28,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:28,760 INFO L225 Difference]: With dead ends: 169 [2021-03-10 22:07:28,760 INFO L226 Difference]: Without dead ends: 150 [2021-03-10 22:07:28,760 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 664.8ms TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:07:28,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-03-10 22:07:28,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 127. [2021-03-10 22:07:28,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 2.134920634920635) internal successors, (269), 126 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:28,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 269 transitions. [2021-03-10 22:07:28,761 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 269 transitions. Word has length 18 [2021-03-10 22:07:28,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:28,761 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 269 transitions. [2021-03-10 22:07:28,761 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:28,761 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 269 transitions. [2021-03-10 22:07:28,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:07:28,761 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:28,761 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:28,961 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10881 [2021-03-10 22:07:28,962 INFO L428 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:28,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:28,962 INFO L82 PathProgramCache]: Analyzing trace with hash 1939197870, now seen corresponding path program 197 times [2021-03-10 22:07:28,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:28,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067637448] [2021-03-10 22:07:28,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:28,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:29,154 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:29,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067637448] [2021-03-10 22:07:29,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713274958] [2021-03-10 22:07:29,154 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:29,214 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:07:29,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:07:29,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:07:29,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:29,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:07:29,391 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:29,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:07:29,395 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:29,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:07:29,399 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:29,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:07:29,403 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:29,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:07:29,406 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:29,471 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:07:29,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:07:29,475 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:29,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:07:29,479 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:29,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:07:29,483 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:29,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:07:29,486 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:29,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:07:29,490 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:29,544 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:07:29,545 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 22:07:29,545 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 3 variables, input treesize:172, output treesize:104 [2021-03-10 22:07:29,735 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:29,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:29,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-03-10 22:07:29,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897649122] [2021-03-10 22:07:29,735 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:07:29,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:29,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:07:29,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:07:29,735 INFO L87 Difference]: Start difference. First operand 127 states and 269 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:30,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:30,133 INFO L93 Difference]: Finished difference Result 164 states and 336 transitions. [2021-03-10 22:07:30,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:07:30,133 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:07:30,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:30,133 INFO L225 Difference]: With dead ends: 164 [2021-03-10 22:07:30,133 INFO L226 Difference]: Without dead ends: 145 [2021-03-10 22:07:30,134 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 637.4ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:07:30,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-03-10 22:07:30,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 129. [2021-03-10 22:07:30,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.140625) internal successors, (274), 128 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) [2021-03-10 22:07:30,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 274 transitions. [2021-03-10 22:07:30,135 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 274 transitions. Word has length 18 [2021-03-10 22:07:30,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:30,135 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 274 transitions. [2021-03-10 22:07:30,135 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:30,135 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 274 transitions. [2021-03-10 22:07:30,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:07:30,135 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:30,135 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:30,335 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10929 [2021-03-10 22:07:30,335 INFO L428 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:30,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:30,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1768024104, now seen corresponding path program 198 times [2021-03-10 22:07:30,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:30,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346162881] [2021-03-10 22:07:30,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:30,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:30,535 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:30,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346162881] [2021-03-10 22:07:30,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586447196] [2021-03-10 22:07:30,535 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:30,595 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:07:30,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:07:30,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:07:30,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:31,384 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:31,385 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:31,390 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:31,390 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:31,395 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:31,396 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:31,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:31,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:31,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:07:31,403 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:31,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:31,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:31,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:07:31,409 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:31,414 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:31,414 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:31,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:31,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:31,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:07:31,420 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:31,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:31,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:31,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-03-10 22:07:31,427 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:31,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:31,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:31,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-03-10 22:07:31,433 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:31,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:31,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:31,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:07:31,439 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:31,443 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:31,444 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:31,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:31,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:31,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:07:31,450 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:31,454 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:31,454 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:31,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:31,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:31,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:07:31,460 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:31,464 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:31,464 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:31,468 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:31,468 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:31,593 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 67 [2021-03-10 22:07:31,593 INFO L628 ElimStorePlain]: treesize reduction 18, result has 88.5 percent of original size [2021-03-10 22:07:31,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:07:31,598 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:31,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:07:31,602 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:31,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:07:31,606 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:31,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:07:31,610 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:31,663 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:07:31,665 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:07:31,665 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 5 variables, input treesize:777, output treesize:89 [2021-03-10 22:07:31,833 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:31,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:31,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-03-10 22:07:31,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304147715] [2021-03-10 22:07:31,833 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:07:31,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:31,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:07:31,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:07:31,833 INFO L87 Difference]: Start difference. First operand 129 states and 274 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:32,139 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2021-03-10 22:07:32,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:32,176 INFO L93 Difference]: Finished difference Result 152 states and 314 transitions. [2021-03-10 22:07:32,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:07:32,176 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:07:32,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:32,176 INFO L225 Difference]: With dead ends: 152 [2021-03-10 22:07:32,176 INFO L226 Difference]: Without dead ends: 140 [2021-03-10 22:07:32,177 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 637.5ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:07:32,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-03-10 22:07:32,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 130. [2021-03-10 22:07:32,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 2.147286821705426) internal successors, (277), 129 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:32,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 277 transitions. [2021-03-10 22:07:32,178 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 277 transitions. Word has length 18 [2021-03-10 22:07:32,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:32,178 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 277 transitions. [2021-03-10 22:07:32,178 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:32,178 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 277 transitions. [2021-03-10 22:07:32,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:07:32,178 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:32,178 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:32,378 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10951,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:32,379 INFO L428 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:32,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:32,379 INFO L82 PathProgramCache]: Analyzing trace with hash -2057091090, now seen corresponding path program 199 times [2021-03-10 22:07:32,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:32,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711855865] [2021-03-10 22:07:32,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:32,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:32,589 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:32,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711855865] [2021-03-10 22:07:32,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351870678] [2021-03-10 22:07:32,589 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:32,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:32,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:07:32,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:33,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:33,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:33,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:07:33,244 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:33,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:33,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:33,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-03-10 22:07:33,250 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:33,254 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:33,254 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:33,258 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:33,259 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:33,263 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:33,263 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:33,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:33,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:33,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-03-10 22:07:33,269 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:33,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:33,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:33,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:07:33,274 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:33,278 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:33,279 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:33,282 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:33,282 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:33,286 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:33,286 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:33,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:33,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:33,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:07:33,291 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:33,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:33,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:07:33,295 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:33,357 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-03-10 22:07:33,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:07:33,361 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:33,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:07:33,364 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:33,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:07:33,368 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:33,393 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:07:33,394 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:07:33,394 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:467, output treesize:52 [2021-03-10 22:07:33,479 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:33,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:33,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-03-10 22:07:33,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374268267] [2021-03-10 22:07:33,480 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:07:33,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:33,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:07:33,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:07:33,480 INFO L87 Difference]: Start difference. First operand 130 states and 277 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:33,787 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2021-03-10 22:07:33,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:33,825 INFO L93 Difference]: Finished difference Result 151 states and 310 transitions. [2021-03-10 22:07:33,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:07:33,825 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:07:33,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:33,826 INFO L225 Difference]: With dead ends: 151 [2021-03-10 22:07:33,826 INFO L226 Difference]: Without dead ends: 135 [2021-03-10 22:07:33,826 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 608.4ms TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:07:33,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-03-10 22:07:33,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 133. [2021-03-10 22:07:33,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.143939393939394) internal successors, (283), 132 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:33,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 283 transitions. [2021-03-10 22:07:33,827 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 283 transitions. Word has length 18 [2021-03-10 22:07:33,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:33,827 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 283 transitions. [2021-03-10 22:07:33,827 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:33,827 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 283 transitions. [2021-03-10 22:07:33,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:07:33,827 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:33,827 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:34,028 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11136 [2021-03-10 22:07:34,028 INFO L428 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:34,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:34,028 INFO L82 PathProgramCache]: Analyzing trace with hash 264953138, now seen corresponding path program 200 times [2021-03-10 22:07:34,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:34,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225750256] [2021-03-10 22:07:34,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:34,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:34,218 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:34,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225750256] [2021-03-10 22:07:34,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158541549] [2021-03-10 22:07:34,219 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:34,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:07:34,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:07:34,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:07:34,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:34,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:34,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:34,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:07:34,926 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:34,930 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:34,931 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:34,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:34,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:34,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:07:34,937 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:34,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:34,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:34,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:07:34,942 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:34,946 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:34,947 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:34,951 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:34,951 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:34,955 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:34,955 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:34,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:34,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:34,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-03-10 22:07:34,961 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:34,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:34,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:34,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-03-10 22:07:34,967 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:34,970 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:34,970 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:34,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:34,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:34,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:07:34,975 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:34,978 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:34,979 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:35,041 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-03-10 22:07:35,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:07:35,045 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:35,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:07:35,049 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:35,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:07:35,052 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:35,077 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:07:35,078 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:07:35,078 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:467, output treesize:52 [2021-03-10 22:07:35,163 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:35,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:35,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-03-10 22:07:35,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221089311] [2021-03-10 22:07:35,164 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:07:35,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:35,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:07:35,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:07:35,164 INFO L87 Difference]: Start difference. First operand 133 states and 283 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:35,483 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2021-03-10 22:07:35,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:35,580 INFO L93 Difference]: Finished difference Result 157 states and 327 transitions. [2021-03-10 22:07:35,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:07:35,581 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:07:35,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:35,581 INFO L225 Difference]: With dead ends: 157 [2021-03-10 22:07:35,581 INFO L226 Difference]: Without dead ends: 144 [2021-03-10 22:07:35,581 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 717.9ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:07:35,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-03-10 22:07:35,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 134. [2021-03-10 22:07:35,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.142857142857143) internal successors, (285), 133 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:35,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 285 transitions. [2021-03-10 22:07:35,582 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 285 transitions. Word has length 18 [2021-03-10 22:07:35,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:35,582 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 285 transitions. [2021-03-10 22:07:35,583 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:35,583 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 285 transitions. [2021-03-10 22:07:35,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:07:35,583 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:35,583 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:35,783 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11231,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:35,783 INFO L428 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:35,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:35,783 INFO L82 PathProgramCache]: Analyzing trace with hash -214331538, now seen corresponding path program 201 times [2021-03-10 22:07:35,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:35,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631825235] [2021-03-10 22:07:35,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:35,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:35,992 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:35,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631825235] [2021-03-10 22:07:35,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794066994] [2021-03-10 22:07:35,993 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:36,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 22:07:36,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:07:36,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:07:36,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:36,961 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:36,962 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:36,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:36,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:36,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:07:36,969 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:36,973 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:36,974 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:36,979 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:36,979 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:36,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:36,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:36,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-03-10 22:07:36,986 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:36,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:36,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:36,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:07:36,992 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:36,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:36,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:36,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-03-10 22:07:36,999 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:37,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:37,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:37,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:07:37,005 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:37,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:37,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:37,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:07:37,011 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:37,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:37,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:37,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:07:37,017 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:37,021 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:37,022 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:37,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:37,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:37,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-03-10 22:07:37,028 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:37,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:37,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:37,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:07:37,034 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:37,039 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:37,039 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:37,044 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:37,044 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:37,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:37,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:37,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:07:37,050 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:37,055 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:37,056 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:37,060 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:37,061 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:37,065 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:37,065 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:37,069 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:37,070 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:37,220 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 68 [2021-03-10 22:07:37,221 INFO L628 ElimStorePlain]: treesize reduction 24, result has 86.4 percent of original size [2021-03-10 22:07:37,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:07:37,225 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:37,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:07:37,230 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:37,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:07:37,234 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:37,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:07:37,238 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:37,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:07:37,242 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:37,302 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:07:37,303 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 22:07:37,303 INFO L247 ElimStorePlain]: Needed 26 recursive calls to eliminate 5 variables, input treesize:897, output treesize:100 [2021-03-10 22:07:37,499 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:37,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:37,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-03-10 22:07:37,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221126836] [2021-03-10 22:07:37,499 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:07:37,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:37,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:07:37,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:07:37,500 INFO L87 Difference]: Start difference. First operand 134 states and 285 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:37,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:37,919 INFO L93 Difference]: Finished difference Result 175 states and 351 transitions. [2021-03-10 22:07:37,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:07:37,920 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:07:37,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:37,920 INFO L225 Difference]: With dead ends: 175 [2021-03-10 22:07:37,920 INFO L226 Difference]: Without dead ends: 156 [2021-03-10 22:07:37,920 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 689.0ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:07:37,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-03-10 22:07:37,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 132. [2021-03-10 22:07:37,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.145038167938931) internal successors, (281), 131 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:37,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 281 transitions. [2021-03-10 22:07:37,921 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 281 transitions. Word has length 18 [2021-03-10 22:07:37,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:37,921 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 281 transitions. [2021-03-10 22:07:37,921 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:37,921 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 281 transitions. [2021-03-10 22:07:37,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:07:37,922 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:37,922 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:38,135 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11300 [2021-03-10 22:07:38,135 INFO L428 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:38,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:38,135 INFO L82 PathProgramCache]: Analyzing trace with hash 852698460, now seen corresponding path program 202 times [2021-03-10 22:07:38,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:38,135 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430280985] [2021-03-10 22:07:38,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:38,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:38,323 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:38,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430280985] [2021-03-10 22:07:38,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839480254] [2021-03-10 22:07:38,323 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 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 [2021-03-10 22:07:38,383 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:07:38,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:07:38,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:07:38,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:38,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:07:38,665 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:38,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:07:38,669 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:38,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:07:38,672 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:38,700 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:07:38,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:07:38,703 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:38,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:07:38,707 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:38,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:07:38,710 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:38,734 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:07:38,735 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:07:38,735 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:88, output treesize:52 [2021-03-10 22:07:38,821 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:38,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:38,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-03-10 22:07:38,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599152959] [2021-03-10 22:07:38,821 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:07:38,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:38,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:07:38,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:07:38,822 INFO L87 Difference]: Start difference. First operand 132 states and 281 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:39,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:39,064 INFO L93 Difference]: Finished difference Result 149 states and 307 transitions. [2021-03-10 22:07:39,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:07:39,064 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:07:39,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:39,065 INFO L225 Difference]: With dead ends: 149 [2021-03-10 22:07:39,065 INFO L226 Difference]: Without dead ends: 136 [2021-03-10 22:07:39,065 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 495.3ms TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:07:39,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-03-10 22:07:39,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 134. [2021-03-10 22:07:39,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.142857142857143) internal successors, (285), 133 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:39,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 285 transitions. [2021-03-10 22:07:39,066 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 285 transitions. Word has length 18 [2021-03-10 22:07:39,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:39,066 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 285 transitions. [2021-03-10 22:07:39,066 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:39,066 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 285 transitions. [2021-03-10 22:07:39,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:07:39,066 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:39,066 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:39,280 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11600,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:39,280 INFO L428 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:39,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:39,281 INFO L82 PathProgramCache]: Analyzing trace with hash 373413784, now seen corresponding path program 203 times [2021-03-10 22:07:39,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:39,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154656593] [2021-03-10 22:07:39,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:39,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:39,484 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:39,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154656593] [2021-03-10 22:07:39,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059435727] [2021-03-10 22:07:39,485 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:39,551 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 22:07:39,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:07:39,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:07:39,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:39,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:07:39,710 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:39,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:07:39,714 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:39,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:07:39,718 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:39,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:07:39,722 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:39,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:07:39,726 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:39,795 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:07:39,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:07:39,799 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:39,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:07:39,803 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:39,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:07:39,806 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:39,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:07:39,810 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:39,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:07:39,814 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:39,872 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:07:39,873 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 22:07:39,873 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 3 variables, input treesize:164, output treesize:96 [2021-03-10 22:07:40,064 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:40,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:40,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-03-10 22:07:40,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072673911] [2021-03-10 22:07:40,064 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:07:40,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:40,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:07:40,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:07:40,065 INFO L87 Difference]: Start difference. First operand 134 states and 285 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:40,410 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 36 [2021-03-10 22:07:40,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:40,505 INFO L93 Difference]: Finished difference Result 156 states and 325 transitions. [2021-03-10 22:07:40,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:07:40,506 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:07:40,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:40,506 INFO L225 Difference]: With dead ends: 156 [2021-03-10 22:07:40,506 INFO L226 Difference]: Without dead ends: 144 [2021-03-10 22:07:40,506 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 660.6ms TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:07:40,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-03-10 22:07:40,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 133. [2021-03-10 22:07:40,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.143939393939394) internal successors, (283), 132 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:40,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 283 transitions. [2021-03-10 22:07:40,508 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 283 transitions. Word has length 18 [2021-03-10 22:07:40,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:40,508 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 283 transitions. [2021-03-10 22:07:40,508 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:40,508 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 283 transitions. [2021-03-10 22:07:40,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:07:40,508 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:40,508 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:40,719 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11639,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:40,720 INFO L428 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:40,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:40,720 INFO L82 PathProgramCache]: Analyzing trace with hash -161816018, now seen corresponding path program 204 times [2021-03-10 22:07:40,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:40,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108072935] [2021-03-10 22:07:40,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:40,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:41,062 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:41,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108072935] [2021-03-10 22:07:41,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065506940] [2021-03-10 22:07:41,062 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:41,124 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 22:07:41,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:07:41,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:07:41,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:41,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:07:41,327 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:41,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:07:41,331 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:41,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:07:41,335 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:41,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:07:41,339 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:41,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:07:41,343 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:41,412 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:07:41,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:07:41,416 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:41,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:07:41,420 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:41,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:07:41,424 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:41,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:07:41,428 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:41,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:07:41,431 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:41,493 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:07:41,495 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 22:07:41,495 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 3 variables, input treesize:164, output treesize:96 [2021-03-10 22:07:41,687 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:41,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:41,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-03-10 22:07:41,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215249923] [2021-03-10 22:07:41,688 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:07:41,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:41,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:07:41,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:07:41,688 INFO L87 Difference]: Start difference. First operand 133 states and 283 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:41,814 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2021-03-10 22:07:42,274 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 36 [2021-03-10 22:07:42,413 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2021-03-10 22:07:42,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:42,523 INFO L93 Difference]: Finished difference Result 207 states and 412 transitions. [2021-03-10 22:07:42,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:07:42,523 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:07:42,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:42,523 INFO L225 Difference]: With dead ends: 207 [2021-03-10 22:07:42,524 INFO L226 Difference]: Without dead ends: 181 [2021-03-10 22:07:42,524 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1211.6ms TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:07:42,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-03-10 22:07:42,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 132. [2021-03-10 22:07:42,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.145038167938931) internal successors, (281), 131 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:42,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 281 transitions. [2021-03-10 22:07:42,525 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 281 transitions. Word has length 18 [2021-03-10 22:07:42,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:42,525 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 281 transitions. [2021-03-10 22:07:42,525 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:42,525 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 281 transitions. [2021-03-10 22:07:42,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:07:42,525 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:42,525 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:42,725 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11664,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:42,726 INFO L428 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:42,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:42,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1892934258, now seen corresponding path program 205 times [2021-03-10 22:07:42,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:42,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664817683] [2021-03-10 22:07:42,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:42,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:42,974 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:42,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664817683] [2021-03-10 22:07:42,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903202051] [2021-03-10 22:07:42,974 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:43,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:43,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:07:43,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:43,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:07:43,236 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:43,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:07:43,239 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:43,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:07:43,243 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:43,272 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:07:43,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:07:43,275 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:43,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:07:43,279 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:43,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:07:43,282 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:43,306 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:07:43,307 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:07:43,307 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:92, output treesize:56 [2021-03-10 22:07:43,393 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:43,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:43,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-03-10 22:07:43,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117387873] [2021-03-10 22:07:43,394 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:07:43,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:43,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:07:43,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:07:43,394 INFO L87 Difference]: Start difference. First operand 132 states and 281 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:43,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:43,916 INFO L93 Difference]: Finished difference Result 161 states and 334 transitions. [2021-03-10 22:07:43,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:07:43,917 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:07:43,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:43,917 INFO L225 Difference]: With dead ends: 161 [2021-03-10 22:07:43,917 INFO L226 Difference]: Without dead ends: 148 [2021-03-10 22:07:43,917 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 6 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 730.5ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:07:43,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-03-10 22:07:43,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 135. [2021-03-10 22:07:43,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.1417910447761193) internal successors, (287), 134 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:43,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 287 transitions. [2021-03-10 22:07:43,918 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 287 transitions. Word has length 18 [2021-03-10 22:07:43,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:43,918 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 287 transitions. [2021-03-10 22:07:43,919 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:43,919 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 287 transitions. [2021-03-10 22:07:43,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:07:43,919 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:43,919 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:44,119 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11700 [2021-03-10 22:07:44,119 INFO L428 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:44,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:44,119 INFO L82 PathProgramCache]: Analyzing trace with hash 1413649582, now seen corresponding path program 206 times [2021-03-10 22:07:44,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:44,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668320847] [2021-03-10 22:07:44,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:44,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:44,309 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:44,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668320847] [2021-03-10 22:07:44,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497118091] [2021-03-10 22:07:44,309 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:44,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:07:44,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:07:44,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:07:44,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:44,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:07:44,577 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:44,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:07:44,580 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:44,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:07:44,584 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:44,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:07:44,588 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:44,640 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:07:44,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:07:44,644 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:44,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:07:44,648 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:44,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:07:44,651 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:44,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:07:44,655 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:44,700 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:07:44,702 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:07:44,702 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:135, output treesize:79 [2021-03-10 22:07:44,850 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:44,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:44,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-03-10 22:07:44,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831498782] [2021-03-10 22:07:44,850 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:07:44,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:44,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:07:44,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:07:44,851 INFO L87 Difference]: Start difference. First operand 135 states and 287 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:45,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:45,077 INFO L93 Difference]: Finished difference Result 150 states and 310 transitions. [2021-03-10 22:07:45,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:07:45,077 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:07:45,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:45,078 INFO L225 Difference]: With dead ends: 150 [2021-03-10 22:07:45,078 INFO L226 Difference]: Without dead ends: 138 [2021-03-10 22:07:45,078 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 470.6ms TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:07:45,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-03-10 22:07:45,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 134. [2021-03-10 22:07:45,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.142857142857143) internal successors, (285), 133 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:45,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 285 transitions. [2021-03-10 22:07:45,079 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 285 transitions. Word has length 18 [2021-03-10 22:07:45,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:45,079 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 285 transitions. [2021-03-10 22:07:45,079 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:45,079 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 285 transitions. [2021-03-10 22:07:45,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:07:45,079 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:45,079 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:45,280 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11733 [2021-03-10 22:07:45,280 INFO L428 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:45,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:45,280 INFO L82 PathProgramCache]: Analyzing trace with hash 878419780, now seen corresponding path program 207 times [2021-03-10 22:07:45,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:45,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743163479] [2021-03-10 22:07:45,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:45,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:45,492 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:45,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743163479] [2021-03-10 22:07:45,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146672095] [2021-03-10 22:07:45,492 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:45,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 22:07:45,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:07:45,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:07:45,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:45,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:07:45,707 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:45,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:07:45,711 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:45,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:07:45,715 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:45,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:07:45,720 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:45,773 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:07:45,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:07:45,777 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:45,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:07:45,781 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:45,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:07:45,784 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:45,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:07:45,788 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:45,833 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:07:45,834 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:07:45,834 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:131, output treesize:75 [2021-03-10 22:07:45,981 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:45,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:45,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-03-10 22:07:45,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438246100] [2021-03-10 22:07:45,981 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:07:45,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:45,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:07:45,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:07:45,982 INFO L87 Difference]: Start difference. First operand 134 states and 285 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:46,530 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 36 [2021-03-10 22:07:46,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:46,734 INFO L93 Difference]: Finished difference Result 211 states and 420 transitions. [2021-03-10 22:07:46,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:07:46,735 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:07:46,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:46,735 INFO L225 Difference]: With dead ends: 211 [2021-03-10 22:07:46,735 INFO L226 Difference]: Without dead ends: 185 [2021-03-10 22:07:46,735 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 865.5ms TimeCoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:07:46,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-03-10 22:07:46,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 135. [2021-03-10 22:07:46,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.156716417910448) internal successors, (289), 134 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:46,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 289 transitions. [2021-03-10 22:07:46,737 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 289 transitions. Word has length 18 [2021-03-10 22:07:46,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:46,737 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 289 transitions. [2021-03-10 22:07:46,737 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:46,737 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 289 transitions. [2021-03-10 22:07:46,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:07:46,737 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:46,737 INFO L519 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:46,937 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11766 [2021-03-10 22:07:46,937 INFO L428 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:46,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:46,938 INFO L82 PathProgramCache]: Analyzing trace with hash 910366733, now seen corresponding path program 208 times [2021-03-10 22:07:46,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:46,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473739778] [2021-03-10 22:07:46,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:46,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:47,011 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:07:47,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473739778] [2021-03-10 22:07:47,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101092665] [2021-03-10 22:07:47,011 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:47,072 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:07:47,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:07:47,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 22:07:47,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:47,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:07:47,240 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:47,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:07:47,243 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:47,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:47,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:47,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:07:47,247 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:47,249 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:47,250 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:47,252 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:47,253 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:47,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:47,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:07:47,256 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:47,294 INFO L628 ElimStorePlain]: treesize reduction 23, result has 58.9 percent of original size [2021-03-10 22:07:47,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:07:47,297 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:47,325 INFO L628 ElimStorePlain]: treesize reduction 1, result has 96.6 percent of original size [2021-03-10 22:07:47,326 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:07:47,326 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 3 variables, input treesize:140, output treesize:12 [2021-03-10 22:07:47,352 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:07:47,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:47,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:07:47,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203691468] [2021-03-10 22:07:47,352 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:07:47,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:47,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:07:47,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:07:47,353 INFO L87 Difference]: Start difference. First operand 135 states and 289 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:47,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:47,532 INFO L93 Difference]: Finished difference Result 160 states and 337 transitions. [2021-03-10 22:07:47,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:07:47,532 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:07:47,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:47,533 INFO L225 Difference]: With dead ends: 160 [2021-03-10 22:07:47,533 INFO L226 Difference]: Without dead ends: 160 [2021-03-10 22:07:47,533 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 235.8ms TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:07:47,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-03-10 22:07:47,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 133. [2021-03-10 22:07:47,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.143939393939394) internal successors, (283), 132 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:47,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 283 transitions. [2021-03-10 22:07:47,534 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 283 transitions. Word has length 18 [2021-03-10 22:07:47,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:47,534 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 283 transitions. [2021-03-10 22:07:47,534 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:47,534 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 283 transitions. [2021-03-10 22:07:47,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:07:47,534 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:47,534 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:47,735 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11788 [2021-03-10 22:07:47,735 INFO L428 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:47,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:47,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1466165102, now seen corresponding path program 209 times [2021-03-10 22:07:47,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:47,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221502771] [2021-03-10 22:07:47,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:47,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:47,928 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:47,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221502771] [2021-03-10 22:07:47,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361171805] [2021-03-10 22:07:47,928 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:47,992 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 22:07:47,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:07:47,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:07:47,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:48,168 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2021-03-10 22:07:48,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:48,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:48,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:07:48,989 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:48,994 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:48,994 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:48,999 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:49,000 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:49,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:49,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:49,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-03-10 22:07:49,007 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:49,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:49,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:49,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:07:49,013 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:49,018 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:49,019 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:49,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:49,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:49,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:07:49,025 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:49,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:49,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:49,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:07:49,031 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:49,035 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:49,036 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:49,040 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:49,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:49,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-03-10 22:07:49,042 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:49,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:49,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:49,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:07:49,048 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:49,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:49,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:49,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:07:49,054 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:49,058 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:49,059 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:49,063 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:49,064 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:49,067 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:49,068 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:49,072 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:49,073 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:49,202 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 67 [2021-03-10 22:07:49,202 INFO L628 ElimStorePlain]: treesize reduction 18, result has 88.5 percent of original size [2021-03-10 22:07:49,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:07:49,207 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:49,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:07:49,211 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:49,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:07:49,215 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:49,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:07:49,219 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:49,272 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:07:49,274 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:07:49,274 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 5 variables, input treesize:777, output treesize:89 [2021-03-10 22:07:49,467 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:49,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:49,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-03-10 22:07:49,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994074041] [2021-03-10 22:07:49,468 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:07:49,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:49,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:07:49,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:07:49,468 INFO L87 Difference]: Start difference. First operand 133 states and 283 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:49,722 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2021-03-10 22:07:49,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:49,748 INFO L93 Difference]: Finished difference Result 156 states and 323 transitions. [2021-03-10 22:07:49,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:07:49,749 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:07:49,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:49,749 INFO L225 Difference]: With dead ends: 156 [2021-03-10 22:07:49,749 INFO L226 Difference]: Without dead ends: 144 [2021-03-10 22:07:49,749 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 659.7ms TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:07:49,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-03-10 22:07:49,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 133. [2021-03-10 22:07:49,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.143939393939394) internal successors, (283), 132 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:49,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 283 transitions. [2021-03-10 22:07:49,750 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 283 transitions. Word has length 18 [2021-03-10 22:07:49,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:49,750 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 283 transitions. [2021-03-10 22:07:49,750 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:49,750 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 283 transitions. [2021-03-10 22:07:49,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:07:49,751 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:49,751 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:49,959 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11824,210 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:49,959 INFO L428 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:49,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:49,959 INFO L82 PathProgramCache]: Analyzing trace with hash -219494372, now seen corresponding path program 210 times [2021-03-10 22:07:49,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:49,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348445636] [2021-03-10 22:07:49,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:49,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:50,151 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:50,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348445636] [2021-03-10 22:07:50,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226359327] [2021-03-10 22:07:50,151 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 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 [2021-03-10 22:07:50,215 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 22:07:50,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:07:50,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:07:50,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:50,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:07:50,455 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:50,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:07:50,459 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:50,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:07:50,462 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:50,491 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:07:50,493 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 5 treesize of output 1 [2021-03-10 22:07:50,494 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:50,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:07:50,498 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:50,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:07:50,501 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:50,525 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:07:50,526 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:07:50,526 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:88, output treesize:52 [2021-03-10 22:07:50,612 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:50,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:50,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-03-10 22:07:50,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082531724] [2021-03-10 22:07:50,612 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:07:50,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:50,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:07:50,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:07:50,613 INFO L87 Difference]: Start difference. First operand 133 states and 283 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:50,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:50,953 INFO L93 Difference]: Finished difference Result 160 states and 333 transitions. [2021-03-10 22:07:50,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:07:50,953 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:07:50,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:50,954 INFO L225 Difference]: With dead ends: 160 [2021-03-10 22:07:50,954 INFO L226 Difference]: Without dead ends: 147 [2021-03-10 22:07:50,954 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 568.7ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:07:50,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-03-10 22:07:50,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 137. [2021-03-10 22:07:50,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.139705882352941) internal successors, (291), 136 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:50,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 291 transitions. [2021-03-10 22:07:50,955 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 291 transitions. Word has length 18 [2021-03-10 22:07:50,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:50,955 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 291 transitions. [2021-03-10 22:07:50,955 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:50,955 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 291 transitions. [2021-03-10 22:07:50,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:07:50,955 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:50,956 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:51,156 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 211 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12102 [2021-03-10 22:07:51,156 INFO L428 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:51,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:51,156 INFO L82 PathProgramCache]: Analyzing trace with hash -698779048, now seen corresponding path program 211 times [2021-03-10 22:07:51,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:51,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249096243] [2021-03-10 22:07:51,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:51,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:51,388 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:51,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249096243] [2021-03-10 22:07:51,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803540516] [2021-03-10 22:07:51,388 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:51,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:51,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:07:51,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:51,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:07:51,660 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:51,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:07:51,665 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:51,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:07:51,669 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:51,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:07:51,673 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:51,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:07:51,677 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:51,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:07:51,681 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:51,684 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:51,685 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:51,770 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:07:51,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:07:51,774 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:51,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:07:51,778 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:51,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:07:51,782 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:51,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:07:51,786 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:51,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:07:51,790 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:51,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:07:51,794 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:51,866 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:07:51,868 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-03-10 22:07:51,868 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 3 variables, input treesize:253, output treesize:133 [2021-03-10 22:07:52,070 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:52,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:52,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-03-10 22:07:52,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829137123] [2021-03-10 22:07:52,071 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:07:52,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:52,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:07:52,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:07:52,071 INFO L87 Difference]: Start difference. First operand 137 states and 291 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:52,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:52,487 INFO L93 Difference]: Finished difference Result 159 states and 331 transitions. [2021-03-10 22:07:52,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:07:52,487 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:07:52,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:52,488 INFO L225 Difference]: With dead ends: 159 [2021-03-10 22:07:52,488 INFO L226 Difference]: Without dead ends: 147 [2021-03-10 22:07:52,488 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 711.4ms TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:07:52,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-03-10 22:07:52,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 136. [2021-03-10 22:07:52,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.140740740740741) internal successors, (289), 135 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:52,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 289 transitions. [2021-03-10 22:07:52,489 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 289 transitions. Word has length 18 [2021-03-10 22:07:52,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:52,489 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 289 transitions. [2021-03-10 22:07:52,489 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:52,489 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 289 transitions. [2021-03-10 22:07:52,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:07:52,490 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:52,490 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:52,690 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12137 [2021-03-10 22:07:52,690 INFO L428 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:52,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:52,690 INFO L82 PathProgramCache]: Analyzing trace with hash -1234008850, now seen corresponding path program 212 times [2021-03-10 22:07:52,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:52,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250449186] [2021-03-10 22:07:52,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:52,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:52,887 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:52,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250449186] [2021-03-10 22:07:52,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024101214] [2021-03-10 22:07:52,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:52,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:07:52,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:07:52,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:07:52,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:53,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:07:53,166 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:53,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:07:53,171 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:53,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:07:53,174 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:53,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:07:53,178 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:53,232 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:07:53,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:07:53,236 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:53,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:07:53,240 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:53,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:07:53,243 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:53,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:07:53,247 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:53,294 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:07:53,295 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:07:53,295 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:131, output treesize:75 [2021-03-10 22:07:53,445 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:53,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:53,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-03-10 22:07:53,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38748707] [2021-03-10 22:07:53,445 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:07:53,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:53,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:07:53,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:07:53,446 INFO L87 Difference]: Start difference. First operand 136 states and 289 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:53,781 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 36 [2021-03-10 22:07:53,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:53,865 INFO L93 Difference]: Finished difference Result 176 states and 362 transitions. [2021-03-10 22:07:53,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:07:53,866 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:07:53,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:53,866 INFO L225 Difference]: With dead ends: 176 [2021-03-10 22:07:53,866 INFO L226 Difference]: Without dead ends: 157 [2021-03-10 22:07:53,866 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 643.9ms TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:07:53,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-03-10 22:07:53,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 137. [2021-03-10 22:07:53,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.1544117647058822) internal successors, (293), 136 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:53,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 293 transitions. [2021-03-10 22:07:53,867 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 293 transitions. Word has length 18 [2021-03-10 22:07:53,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:53,867 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 293 transitions. [2021-03-10 22:07:53,868 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:53,868 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 293 transitions. [2021-03-10 22:07:53,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:07:53,868 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:53,868 INFO L519 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:54,068 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12172,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:54,068 INFO L428 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:54,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:54,068 INFO L82 PathProgramCache]: Analyzing trace with hash -1202061897, now seen corresponding path program 213 times [2021-03-10 22:07:54,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:54,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938899478] [2021-03-10 22:07:54,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:54,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:54,136 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:07:54,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938899478] [2021-03-10 22:07:54,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143465084] [2021-03-10 22:07:54,136 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:54,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 22:07:54,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:07:54,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 22:07:54,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:54,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:07:54,423 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:54,425 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:54,426 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:54,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:07:54,429 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:54,431 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:54,432 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:54,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:54,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:54,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:07:54,436 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:54,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:54,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:54,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:07:54,440 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:54,442 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:54,443 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:54,445 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:54,445 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:54,484 INFO L628 ElimStorePlain]: treesize reduction 25, result has 56.9 percent of original size [2021-03-10 22:07:54,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:07:54,487 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:54,514 INFO L628 ElimStorePlain]: treesize reduction 1, result has 96.6 percent of original size [2021-03-10 22:07:54,515 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:07:54,515 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 3 variables, input treesize:199, output treesize:12 [2021-03-10 22:07:54,541 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:07:54,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:54,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:07:54,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532583335] [2021-03-10 22:07:54,541 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:07:54,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:54,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:07:54,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:07:54,542 INFO L87 Difference]: Start difference. First operand 137 states and 293 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:54,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:54,759 INFO L93 Difference]: Finished difference Result 163 states and 343 transitions. [2021-03-10 22:07:54,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:07:54,759 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:07:54,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:54,760 INFO L225 Difference]: With dead ends: 163 [2021-03-10 22:07:54,760 INFO L226 Difference]: Without dead ends: 163 [2021-03-10 22:07:54,760 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 260.7ms TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:07:54,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-03-10 22:07:54,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 136. [2021-03-10 22:07:54,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.140740740740741) internal successors, (289), 135 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:54,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 289 transitions. [2021-03-10 22:07:54,761 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 289 transitions. Word has length 18 [2021-03-10 22:07:54,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:54,761 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 289 transitions. [2021-03-10 22:07:54,761 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:54,761 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 289 transitions. [2021-03-10 22:07:54,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:07:54,761 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:54,761 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:54,962 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12206 [2021-03-10 22:07:54,962 INFO L428 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:54,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:54,962 INFO L82 PathProgramCache]: Analyzing trace with hash -646263528, now seen corresponding path program 214 times [2021-03-10 22:07:54,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:54,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266049628] [2021-03-10 22:07:54,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:54,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:55,174 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:55,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266049628] [2021-03-10 22:07:55,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185304471] [2021-03-10 22:07:55,175 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:55,237 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:07:55,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:07:55,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:07:55,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:56,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:56,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:56,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:07:56,025 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:56,030 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:56,031 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:56,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:56,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:56,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:07:56,038 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:56,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:56,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:56,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-03-10 22:07:56,045 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:56,049 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:56,050 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:56,055 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:56,056 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:56,060 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:56,061 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:56,065 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:56,066 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:56,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:56,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:56,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:07:56,072 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:56,077 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:56,077 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:56,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:56,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:56,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:07:56,083 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:56,088 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:56,088 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:56,093 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:56,093 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:56,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:56,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:56,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:07:56,099 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:56,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:56,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:56,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-03-10 22:07:56,105 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:56,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:56,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:07:56,110 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:56,240 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 67 [2021-03-10 22:07:56,240 INFO L628 ElimStorePlain]: treesize reduction 18, result has 88.5 percent of original size [2021-03-10 22:07:56,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:07:56,245 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:56,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:07:56,249 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:56,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:07:56,253 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:56,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:07:56,257 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:56,312 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:07:56,313 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:07:56,313 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 5 variables, input treesize:777, output treesize:89 [2021-03-10 22:07:56,477 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:56,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:56,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-03-10 22:07:56,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694107866] [2021-03-10 22:07:56,478 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:07:56,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:56,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:07:56,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:07:56,478 INFO L87 Difference]: Start difference. First operand 136 states and 289 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:56,602 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 44 [2021-03-10 22:07:57,154 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2021-03-10 22:07:57,290 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 47 [2021-03-10 22:07:57,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:07:57,480 INFO L93 Difference]: Finished difference Result 239 states and 471 transitions. [2021-03-10 22:07:57,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:07:57,481 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:07:57,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:07:57,481 INFO L225 Difference]: With dead ends: 239 [2021-03-10 22:07:57,481 INFO L226 Difference]: Without dead ends: 206 [2021-03-10 22:07:57,481 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 1255.3ms TimeCoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:07:57,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-03-10 22:07:57,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 136. [2021-03-10 22:07:57,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.140740740740741) internal successors, (289), 135 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:57,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 289 transitions. [2021-03-10 22:07:57,483 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 289 transitions. Word has length 18 [2021-03-10 22:07:57,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:07:57,483 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 289 transitions. [2021-03-10 22:07:57,483 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:07:57,483 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 289 transitions. [2021-03-10 22:07:57,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:07:57,483 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:07:57,483 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:07:57,683 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12263,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:07:57,683 INFO L428 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:07:57,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:07:57,684 INFO L82 PathProgramCache]: Analyzing trace with hash 393972270, now seen corresponding path program 215 times [2021-03-10 22:07:57,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:07:57,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608198641] [2021-03-10 22:07:57,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:07:57,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:07:57,997 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:57,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608198641] [2021-03-10 22:07:57,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676106175] [2021-03-10 22:07:57,997 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 22:07:58,059 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 22:07:58,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:07:58,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 32 conjunts are in the unsatisfiable core [2021-03-10 22:07:58,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:07:59,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:59,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:59,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:07:59,131 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:59,136 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:59,137 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:59,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:59,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:59,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:07:59,144 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:59,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:07:59,150 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:59,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:07:59,156 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:59,161 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:59,162 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:59,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:59,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:59,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-03-10 22:07:59,168 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:59,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:59,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:59,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-03-10 22:07:59,175 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:59,180 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:59,180 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:59,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:59,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:59,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:07:59,187 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:59,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:59,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:59,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-03-10 22:07:59,195 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:59,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:07:59,200 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:59,205 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:59,206 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:59,210 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:59,211 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:59,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:59,216 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:59,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:07:59,217 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:59,222 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:59,222 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:59,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:59,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:59,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:07:59,229 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:59,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:59,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:59,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:07:59,235 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:59,239 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:07:59,240 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:59,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:07:59,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:07:59,245 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:59,510 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 82 [2021-03-10 22:07:59,511 INFO L628 ElimStorePlain]: treesize reduction 29, result has 91.2 percent of original size [2021-03-10 22:07:59,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:07:59,516 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:59,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:07:59,532 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:59,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:07:59,536 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:59,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:07:59,541 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:59,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:07:59,546 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:59,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:07:59,550 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:59,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:07:59,554 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:59,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:07:59,559 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:59,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:07:59,564 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-03-10 22:07:59,763 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 71 [2021-03-10 22:07:59,763 INFO L628 ElimStorePlain]: treesize reduction 30, result has 88.3 percent of original size [2021-03-10 22:07:59,765 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 8 xjuncts. [2021-03-10 22:07:59,766 INFO L247 ElimStorePlain]: Needed 30 recursive calls to eliminate 5 variables, input treesize:906, output treesize:175 [2021-03-10 22:07:59,983 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:07:59,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:07:59,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-03-10 22:07:59,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133773098] [2021-03-10 22:07:59,984 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:07:59,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:07:59,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:07:59,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:07:59,984 INFO L87 Difference]: Start difference. First operand 136 states and 289 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:00,563 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 59 [2021-03-10 22:08:00,707 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 63 [2021-03-10 22:08:00,881 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 64 [2021-03-10 22:08:01,031 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 62 [2021-03-10 22:08:01,341 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 30 [2021-03-10 22:08:01,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:01,504 INFO L93 Difference]: Finished difference Result 166 states and 348 transitions. [2021-03-10 22:08:01,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:08:01,505 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:08:01,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:01,505 INFO L225 Difference]: With dead ends: 166 [2021-03-10 22:08:01,505 INFO L226 Difference]: Without dead ends: 159 [2021-03-10 22:08:01,505 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 1924.8ms TimeCoverageRelationStatistics Valid=116, Invalid=754, Unknown=0, NotChecked=0, Total=870 [2021-03-10 22:08:01,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-03-10 22:08:01,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 141. [2021-03-10 22:08:01,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.15) internal successors, (301), 140 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:01,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 301 transitions. [2021-03-10 22:08:01,507 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 301 transitions. Word has length 18 [2021-03-10 22:08:01,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:01,507 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 301 transitions. [2021-03-10 22:08:01,507 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:01,507 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 301 transitions. [2021-03-10 22:08:01,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:08:01,507 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:01,507 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:01,707 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12332 [2021-03-10 22:08:01,707 INFO L428 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:01,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:01,707 INFO L82 PathProgramCache]: Analyzing trace with hash 497747466, now seen corresponding path program 216 times [2021-03-10 22:08:01,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:01,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203671358] [2021-03-10 22:08:01,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:01,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:01,929 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:01,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203671358] [2021-03-10 22:08:01,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348363778] [2021-03-10 22:08:01,930 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:01,993 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:08:01,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:08:01,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:08:01,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:02,826 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:02,828 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:02,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:02,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:02,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:08:02,833 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:02,837 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:02,838 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:02,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:02,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:02,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-03-10 22:08:02,843 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:02,847 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:02,848 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:02,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:02,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:02,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:08:02,853 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:02,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:02,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:02,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:08:02,858 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:02,862 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:02,862 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:02,865 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:02,866 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:02,869 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:02,870 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:02,873 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:02,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:02,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-03-10 22:08:02,875 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:02,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:02,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:08:02,879 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:02,943 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-03-10 22:08:02,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:08:02,947 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:02,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:08:02,951 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:02,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:08:02,954 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:02,980 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:02,981 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:08:02,981 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:467, output treesize:52 [2021-03-10 22:08:03,073 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:03,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:03,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-03-10 22:08:03,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840968550] [2021-03-10 22:08:03,073 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:08:03,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:03,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:08:03,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:08:03,073 INFO L87 Difference]: Start difference. First operand 141 states and 301 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:03,423 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2021-03-10 22:08:03,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:03,560 INFO L93 Difference]: Finished difference Result 174 states and 363 transitions. [2021-03-10 22:08:03,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:08:03,561 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:08:03,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:03,561 INFO L225 Difference]: With dead ends: 174 [2021-03-10 22:08:03,561 INFO L226 Difference]: Without dead ends: 155 [2021-03-10 22:08:03,561 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 859.1ms TimeCoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:08:03,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-03-10 22:08:03,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 142. [2021-03-10 22:08:03,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.148936170212766) internal successors, (303), 141 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:03,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 303 transitions. [2021-03-10 22:08:03,562 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 303 transitions. Word has length 18 [2021-03-10 22:08:03,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:03,562 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 303 transitions. [2021-03-10 22:08:03,562 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:03,562 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 303 transitions. [2021-03-10 22:08:03,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:08:03,563 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:03,563 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:03,763 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12523 [2021-03-10 22:08:03,763 INFO L428 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:03,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:03,763 INFO L82 PathProgramCache]: Analyzing trace with hash -533325498, now seen corresponding path program 217 times [2021-03-10 22:08:03,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:03,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814172448] [2021-03-10 22:08:03,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:03,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:03,994 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:03,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814172448] [2021-03-10 22:08:03,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071049340] [2021-03-10 22:08:03,995 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:04,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:04,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:08:04,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:04,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:04,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:04,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:08:04,873 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:04,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:04,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:04,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:08:04,879 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:04,883 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:04,883 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:04,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:04,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:04,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-03-10 22:08:04,889 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:04,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:04,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:04,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:08:04,895 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:04,898 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:04,899 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:04,903 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:04,904 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:04,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:04,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:04,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-03-10 22:08:04,909 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:04,913 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:04,913 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:04,916 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:04,917 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:04,920 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:04,921 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:04,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:04,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:08:04,925 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:04,989 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-03-10 22:08:04,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:08:04,993 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:04,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:08:04,996 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:04,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:08:05,000 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:05,026 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:05,027 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:08:05,027 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:467, output treesize:52 [2021-03-10 22:08:05,114 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:05,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:05,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-03-10 22:08:05,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058112698] [2021-03-10 22:08:05,114 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:08:05,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:05,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:08:05,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:08:05,114 INFO L87 Difference]: Start difference. First operand 142 states and 303 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:05,523 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 56 [2021-03-10 22:08:05,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:05,563 INFO L93 Difference]: Finished difference Result 162 states and 334 transitions. [2021-03-10 22:08:05,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:08:05,563 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:08:05,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:05,564 INFO L225 Difference]: With dead ends: 162 [2021-03-10 22:08:05,564 INFO L226 Difference]: Without dead ends: 146 [2021-03-10 22:08:05,564 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 768.5ms TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:08:05,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-03-10 22:08:05,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 143. [2021-03-10 22:08:05,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.147887323943662) internal successors, (305), 142 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:05,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 305 transitions. [2021-03-10 22:08:05,565 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 305 transitions. Word has length 18 [2021-03-10 22:08:05,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:05,565 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 305 transitions. [2021-03-10 22:08:05,565 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:05,565 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 305 transitions. [2021-03-10 22:08:05,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:08:05,565 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:05,565 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:05,766 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12721,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:05,766 INFO L428 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:05,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:05,766 INFO L82 PathProgramCache]: Analyzing trace with hash 1788718730, now seen corresponding path program 218 times [2021-03-10 22:08:05,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:05,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107165080] [2021-03-10 22:08:05,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:05,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:05,998 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:05,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107165080] [2021-03-10 22:08:05,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754296548] [2021-03-10 22:08:05,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:06,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:08:06,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:08:06,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:08:06,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:06,914 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:06,915 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:06,919 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:06,920 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:06,924 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:06,924 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:06,928 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:06,929 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:06,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:06,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:06,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:08:06,934 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:06,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:06,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:06,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:08:06,940 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:06,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:06,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:06,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-03-10 22:08:06,945 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:06,949 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:06,949 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:06,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:06,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:06,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-03-10 22:08:06,955 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:06,958 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:06,959 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:06,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:06,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:06,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:08:06,964 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:06,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:06,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:08:06,968 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:07,032 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-03-10 22:08:07,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:08:07,035 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:07,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:08:07,039 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:07,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:08:07,043 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:07,068 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:07,069 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:08:07,069 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:467, output treesize:52 [2021-03-10 22:08:07,161 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:07,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:07,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-03-10 22:08:07,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657193639] [2021-03-10 22:08:07,161 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:08:07,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:07,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:08:07,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:08:07,162 INFO L87 Difference]: Start difference. First operand 143 states and 305 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:07,488 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2021-03-10 22:08:07,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:07,584 INFO L93 Difference]: Finished difference Result 168 states and 351 transitions. [2021-03-10 22:08:07,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:08:07,584 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:08:07,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:07,584 INFO L225 Difference]: With dead ends: 168 [2021-03-10 22:08:07,584 INFO L226 Difference]: Without dead ends: 155 [2021-03-10 22:08:07,585 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 803.3ms TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:08:07,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-03-10 22:08:07,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 144. [2021-03-10 22:08:07,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.1468531468531467) internal successors, (307), 143 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:07,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 307 transitions. [2021-03-10 22:08:07,586 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 307 transitions. Word has length 18 [2021-03-10 22:08:07,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:07,586 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 307 transitions. [2021-03-10 22:08:07,586 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:07,586 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 307 transitions. [2021-03-10 22:08:07,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:08:07,586 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:07,586 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:07,799 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12827 [2021-03-10 22:08:07,799 INFO L428 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:07,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:07,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1309434054, now seen corresponding path program 219 times [2021-03-10 22:08:07,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:07,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7247896] [2021-03-10 22:08:07,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:07,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:08,028 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:08,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7247896] [2021-03-10 22:08:08,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915261515] [2021-03-10 22:08:08,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:08,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:08:08,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:08:08,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:08:08,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:09,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:09,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:09,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:08:09,235 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:09,240 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:09,241 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:09,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:09,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:09,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-03-10 22:08:09,248 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:09,252 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:09,253 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:09,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:09,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:09,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:08:09,259 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:09,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:09,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:09,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:08:09,266 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:09,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:09,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:09,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:08:09,273 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:09,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:09,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:09,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-03-10 22:08:09,280 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:09,284 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:09,285 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:09,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:09,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:09,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-03-10 22:08:09,292 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:09,297 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:09,297 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:09,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:09,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:09,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:08:09,304 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:09,308 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:09,308 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:09,313 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:09,314 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:09,318 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:09,319 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:09,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:09,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:09,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:08:09,325 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:09,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:09,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:09,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:08:09,331 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:09,335 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:09,336 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:09,340 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:09,341 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:09,344 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:09,345 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:09,504 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 68 [2021-03-10 22:08:09,504 INFO L628 ElimStorePlain]: treesize reduction 24, result has 86.6 percent of original size [2021-03-10 22:08:09,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:08:09,508 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:09,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:08:09,513 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:09,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:08:09,517 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:09,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:08:09,521 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:09,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:08:09,525 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:09,587 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:09,589 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 22:08:09,589 INFO L247 ElimStorePlain]: Needed 26 recursive calls to eliminate 5 variables, input treesize:905, output treesize:104 [2021-03-10 22:08:09,790 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:09,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:09,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-03-10 22:08:09,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526633615] [2021-03-10 22:08:09,791 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:08:09,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:09,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:08:09,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:08:09,791 INFO L87 Difference]: Start difference. First operand 144 states and 307 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:10,018 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 51 [2021-03-10 22:08:10,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:10,689 INFO L93 Difference]: Finished difference Result 190 states and 383 transitions. [2021-03-10 22:08:10,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:08:10,689 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:08:10,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:10,690 INFO L225 Difference]: With dead ends: 190 [2021-03-10 22:08:10,690 INFO L226 Difference]: Without dead ends: 171 [2021-03-10 22:08:10,690 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1158.2ms TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:08:10,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-03-10 22:08:10,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 142. [2021-03-10 22:08:10,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.148936170212766) internal successors, (303), 141 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:10,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 303 transitions. [2021-03-10 22:08:10,691 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 303 transitions. Word has length 18 [2021-03-10 22:08:10,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:10,691 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 303 transitions. [2021-03-10 22:08:10,691 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:10,691 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 303 transitions. [2021-03-10 22:08:10,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:08:10,691 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:10,691 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:10,892 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12929,220 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:10,892 INFO L428 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:10,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:10,892 INFO L82 PathProgramCache]: Analyzing trace with hash 506910300, now seen corresponding path program 220 times [2021-03-10 22:08:10,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:10,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100948307] [2021-03-10 22:08:10,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:10,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:11,090 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:11,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100948307] [2021-03-10 22:08:11,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847120015] [2021-03-10 22:08:11,091 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:11,154 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:08:11,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:08:11,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:08:11,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:11,906 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:11,906 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:11,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:11,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:11,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:08:11,912 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:11,916 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:11,917 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:11,921 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:11,921 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:11,925 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:11,926 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:11,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:11,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:11,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:08:11,931 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:11,935 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:11,935 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:11,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:11,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:11,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-03-10 22:08:11,941 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:11,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:11,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:11,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:08:11,946 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:11,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:11,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:11,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-03-10 22:08:11,951 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:11,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:11,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:11,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:08:11,956 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:11,959 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:11,960 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:12,025 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-03-10 22:08:12,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:08:12,029 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:12,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:08:12,033 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:12,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:08:12,036 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:12,063 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:12,064 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:08:12,064 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:467, output treesize:52 [2021-03-10 22:08:12,150 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:12,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:12,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-03-10 22:08:12,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217638121] [2021-03-10 22:08:12,151 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:08:12,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:12,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:08:12,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:08:12,151 INFO L87 Difference]: Start difference. First operand 142 states and 303 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:12,479 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2021-03-10 22:08:12,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:12,513 INFO L93 Difference]: Finished difference Result 162 states and 334 transitions. [2021-03-10 22:08:12,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:08:12,514 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:08:12,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:12,514 INFO L225 Difference]: With dead ends: 162 [2021-03-10 22:08:12,514 INFO L226 Difference]: Without dead ends: 146 [2021-03-10 22:08:12,514 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 633.4ms TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:08:12,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-03-10 22:08:12,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 143. [2021-03-10 22:08:12,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.147887323943662) internal successors, (305), 142 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:12,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 305 transitions. [2021-03-10 22:08:12,515 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 305 transitions. Word has length 18 [2021-03-10 22:08:12,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:12,515 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 305 transitions. [2021-03-10 22:08:12,516 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:12,516 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 305 transitions. [2021-03-10 22:08:12,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:08:12,516 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:12,516 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:12,716 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13239,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:12,717 INFO L428 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:12,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:12,717 INFO L82 PathProgramCache]: Analyzing trace with hash -1466012768, now seen corresponding path program 221 times [2021-03-10 22:08:12,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:12,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72206793] [2021-03-10 22:08:12,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:12,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:12,918 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:12,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72206793] [2021-03-10 22:08:12,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711266702] [2021-03-10 22:08:12,918 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:12,983 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:08:12,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:08:12,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:08:12,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:13,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:13,658 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:13,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:08:13,659 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:13,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:13,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:13,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:08:13,665 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:13,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:13,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:13,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:08:13,671 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:13,675 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:13,676 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:13,679 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:13,680 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:13,684 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:13,684 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:13,688 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:13,688 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:13,692 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:13,693 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:13,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:13,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:13,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:08:13,698 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:13,701 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:13,701 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:13,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:13,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:13,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-03-10 22:08:13,707 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:13,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:13,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-03-10 22:08:13,711 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:13,775 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-03-10 22:08:13,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:08:13,779 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:13,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:08:13,783 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:13,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:08:13,786 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:13,813 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:13,814 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:08:13,814 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:467, output treesize:52 [2021-03-10 22:08:13,904 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:13,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:13,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-03-10 22:08:13,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442063952] [2021-03-10 22:08:13,905 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:08:13,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:13,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:08:13,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:08:13,905 INFO L87 Difference]: Start difference. First operand 143 states and 305 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:14,298 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2021-03-10 22:08:14,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:14,329 INFO L93 Difference]: Finished difference Result 160 states and 331 transitions. [2021-03-10 22:08:14,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:08:14,329 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:08:14,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:14,329 INFO L225 Difference]: With dead ends: 160 [2021-03-10 22:08:14,329 INFO L226 Difference]: Without dead ends: 147 [2021-03-10 22:08:14,329 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 705.8ms TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:08:14,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-03-10 22:08:14,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 144. [2021-03-10 22:08:14,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.1468531468531467) internal successors, (307), 143 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:14,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 307 transitions. [2021-03-10 22:08:14,331 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 307 transitions. Word has length 18 [2021-03-10 22:08:14,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:14,331 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 307 transitions. [2021-03-10 22:08:14,331 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:14,331 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 307 transitions. [2021-03-10 22:08:14,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:08:14,331 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:14,331 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:14,531 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13341,222 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:14,531 INFO L428 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:14,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:14,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1945297444, now seen corresponding path program 222 times [2021-03-10 22:08:14,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:14,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12139728] [2021-03-10 22:08:14,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:14,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:14,975 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:14,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12139728] [2021-03-10 22:08:14,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409871473] [2021-03-10 22:08:14,976 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 22:08:15,040 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:08:15,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:08:15,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:08:15,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:15,845 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:15,846 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:15,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:15,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:15,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:08:15,853 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:15,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:15,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:15,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:08:15,859 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:15,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:15,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:15,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-03-10 22:08:15,866 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:15,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:15,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:15,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-03-10 22:08:15,873 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:15,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:15,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:15,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:08:15,879 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:15,884 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:15,884 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:15,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:15,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:15,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:08:15,890 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:15,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:15,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:15,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:08:15,896 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:15,901 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:15,901 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:15,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:15,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:15,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:08:15,907 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:15,912 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:15,912 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:15,917 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:15,917 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:15,921 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:15,922 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:15,926 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:15,927 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:15,930 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:15,931 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:16,048 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 64 [2021-03-10 22:08:16,048 INFO L628 ElimStorePlain]: treesize reduction 18, result has 87.2 percent of original size [2021-03-10 22:08:16,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:08:16,053 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:16,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:08:16,057 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:16,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:08:16,061 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:16,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:08:16,065 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:16,112 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:16,119 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:08:16,119 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 5 variables, input treesize:709, output treesize:79 [2021-03-10 22:08:16,274 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:16,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:16,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-03-10 22:08:16,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925642849] [2021-03-10 22:08:16,275 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:08:16,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:16,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:08:16,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:08:16,275 INFO L87 Difference]: Start difference. First operand 144 states and 307 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:16,406 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 37 [2021-03-10 22:08:16,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:16,750 INFO L93 Difference]: Finished difference Result 161 states and 334 transitions. [2021-03-10 22:08:16,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:08:16,750 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:08:16,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:16,751 INFO L225 Difference]: With dead ends: 161 [2021-03-10 22:08:16,751 INFO L226 Difference]: Without dead ends: 149 [2021-03-10 22:08:16,751 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1010.2ms TimeCoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:08:16,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-03-10 22:08:16,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 142. [2021-03-10 22:08:16,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.148936170212766) internal successors, (303), 141 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:16,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 303 transitions. [2021-03-10 22:08:16,752 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 303 transitions. Word has length 18 [2021-03-10 22:08:16,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:16,752 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 303 transitions. [2021-03-10 22:08:16,752 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:16,752 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 303 transitions. [2021-03-10 22:08:16,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:08:16,753 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:16,753 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:16,953 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13485,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:16,953 INFO L428 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:16,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:16,953 INFO L82 PathProgramCache]: Analyzing trace with hash -878267446, now seen corresponding path program 223 times [2021-03-10 22:08:16,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:16,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365311108] [2021-03-10 22:08:16,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:16,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:17,147 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:17,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365311108] [2021-03-10 22:08:17,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728700767] [2021-03-10 22:08:17,147 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:17,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:17,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:08:17,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:17,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:08:17,457 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:17,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:08:17,461 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:17,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:08:17,464 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:17,494 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:17,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:08:17,497 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:17,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:08:17,501 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:17,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:08:17,504 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:17,534 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:17,535 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:08:17,535 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:88, output treesize:52 [2021-03-10 22:08:17,621 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:17,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:17,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-03-10 22:08:17,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672597310] [2021-03-10 22:08:17,621 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:08:17,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:17,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:08:17,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:08:17,622 INFO L87 Difference]: Start difference. First operand 142 states and 303 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:17,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:17,905 INFO L93 Difference]: Finished difference Result 159 states and 329 transitions. [2021-03-10 22:08:17,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:08:17,905 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:08:17,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:17,906 INFO L225 Difference]: With dead ends: 159 [2021-03-10 22:08:17,906 INFO L226 Difference]: Without dead ends: 146 [2021-03-10 22:08:17,906 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 539.7ms TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:08:17,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-03-10 22:08:17,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 143. [2021-03-10 22:08:17,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.147887323943662) internal successors, (305), 142 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:17,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 305 transitions. [2021-03-10 22:08:17,907 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 305 transitions. Word has length 18 [2021-03-10 22:08:17,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:17,907 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 305 transitions. [2021-03-10 22:08:17,907 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:17,907 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 305 transitions. [2021-03-10 22:08:17,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:08:17,908 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:17,908 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:18,108 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13667 [2021-03-10 22:08:18,108 INFO L428 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:18,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:18,108 INFO L82 PathProgramCache]: Analyzing trace with hash -1357552122, now seen corresponding path program 224 times [2021-03-10 22:08:18,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:18,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797279275] [2021-03-10 22:08:18,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:18,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:18,297 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:18,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797279275] [2021-03-10 22:08:18,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878856192] [2021-03-10 22:08:18,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:18,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:08:18,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:08:18,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:08:18,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:18,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:08:18,500 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:18,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:08:18,503 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:18,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:08:18,507 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:18,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:08:18,520 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:18,574 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:18,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:08:18,578 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:18,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:08:18,582 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:18,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:08:18,585 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:18,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:08:18,589 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:18,635 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:18,637 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:08:18,637 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:139, output treesize:83 [2021-03-10 22:08:18,786 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:18,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:18,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-03-10 22:08:18,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603909324] [2021-03-10 22:08:18,787 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:08:18,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:18,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:08:18,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:08:18,787 INFO L87 Difference]: Start difference. First operand 143 states and 305 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:19,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:19,101 INFO L93 Difference]: Finished difference Result 159 states and 330 transitions. [2021-03-10 22:08:19,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:08:19,101 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:08:19,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:19,102 INFO L225 Difference]: With dead ends: 159 [2021-03-10 22:08:19,102 INFO L226 Difference]: Without dead ends: 147 [2021-03-10 22:08:19,102 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 498.8ms TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:08:19,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-03-10 22:08:19,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 142. [2021-03-10 22:08:19,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.148936170212766) internal successors, (303), 141 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:19,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 303 transitions. [2021-03-10 22:08:19,103 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 303 transitions. Word has length 18 [2021-03-10 22:08:19,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:19,103 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 303 transitions. [2021-03-10 22:08:19,103 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:19,103 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 303 transitions. [2021-03-10 22:08:19,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:08:19,103 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:19,103 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:19,303 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13690,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:19,304 INFO L428 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:19,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:19,304 INFO L82 PathProgramCache]: Analyzing trace with hash -1892781924, now seen corresponding path program 225 times [2021-03-10 22:08:19,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:19,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955466115] [2021-03-10 22:08:19,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:19,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:19,499 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:19,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955466115] [2021-03-10 22:08:19,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198358126] [2021-03-10 22:08:19,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:19,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 22:08:19,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:08:19,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:08:19,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:19,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:08:19,714 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:19,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:08:19,719 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:19,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:08:19,723 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:19,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:08:19,727 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:19,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:08:19,731 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:19,802 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:19,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:08:19,806 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:19,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:08:19,810 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:19,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:08:19,814 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:19,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:08:19,818 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:19,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:08:19,822 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:19,882 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:19,884 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 22:08:19,884 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 3 variables, input treesize:168, output treesize:100 [2021-03-10 22:08:20,076 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:20,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:20,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-03-10 22:08:20,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67675870] [2021-03-10 22:08:20,076 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:08:20,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:20,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:08:20,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:08:20,076 INFO L87 Difference]: Start difference. First operand 142 states and 303 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:20,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:20,814 INFO L93 Difference]: Finished difference Result 219 states and 436 transitions. [2021-03-10 22:08:20,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:08:20,814 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:08:20,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:20,815 INFO L225 Difference]: With dead ends: 219 [2021-03-10 22:08:20,815 INFO L226 Difference]: Without dead ends: 193 [2021-03-10 22:08:20,815 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 893.6ms TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:08:20,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-03-10 22:08:20,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 142. [2021-03-10 22:08:20,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.148936170212766) internal successors, (303), 141 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:20,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 303 transitions. [2021-03-10 22:08:20,816 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 303 transitions. Word has length 18 [2021-03-10 22:08:20,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:20,816 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 303 transitions. [2021-03-10 22:08:20,816 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:20,816 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 303 transitions. [2021-03-10 22:08:20,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:08:20,817 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:20,817 INFO L519 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:21,017 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13715 [2021-03-10 22:08:21,017 INFO L428 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:21,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:21,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1860834971, now seen corresponding path program 226 times [2021-03-10 22:08:21,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:21,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728859372] [2021-03-10 22:08:21,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:21,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:21,087 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:08:21,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728859372] [2021-03-10 22:08:21,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874699473] [2021-03-10 22:08:21,087 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:21,150 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:08:21,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:08:21,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 22:08:21,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:21,343 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:08:21,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:21,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:08:21,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168582493] [2021-03-10 22:08:21,344 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:08:21,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:21,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:08:21,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:08:21,344 INFO L87 Difference]: Start difference. First operand 142 states and 303 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:21,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:21,471 INFO L93 Difference]: Finished difference Result 158 states and 333 transitions. [2021-03-10 22:08:21,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 22:08:21,472 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:08:21,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:21,472 INFO L225 Difference]: With dead ends: 158 [2021-03-10 22:08:21,472 INFO L226 Difference]: Without dead ends: 158 [2021-03-10 22:08:21,472 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 193.0ms TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:08:21,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-03-10 22:08:21,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 139. [2021-03-10 22:08:21,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.13768115942029) internal successors, (295), 138 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:21,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 295 transitions. [2021-03-10 22:08:21,473 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 295 transitions. Word has length 18 [2021-03-10 22:08:21,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:21,474 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 295 transitions. [2021-03-10 22:08:21,474 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:21,474 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 295 transitions. [2021-03-10 22:08:21,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:08:21,474 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:21,474 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:21,674 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13740 [2021-03-10 22:08:21,674 INFO L428 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:21,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:21,674 INFO L82 PathProgramCache]: Analyzing trace with hash -1605518330, now seen corresponding path program 227 times [2021-03-10 22:08:21,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:21,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051292050] [2021-03-10 22:08:21,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:21,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:21,874 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:21,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051292050] [2021-03-10 22:08:21,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707457637] [2021-03-10 22:08:21,874 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:21,939 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:08:21,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:08:21,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:08:21,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:22,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:22,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:22,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:08:22,536 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:22,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:22,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:22,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:08:22,542 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:22,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:22,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:22,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-03-10 22:08:22,548 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:22,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:22,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:22,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-03-10 22:08:22,555 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:22,559 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:22,559 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:22,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:22,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:22,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-03-10 22:08:22,566 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:22,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:22,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:22,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:08:22,571 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:22,575 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:22,576 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:22,580 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:22,581 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:22,584 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:22,585 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:22,589 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:22,590 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:22,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:22,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:22,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:08:22,595 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:22,599 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:22,599 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:22,603 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:22,604 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:22,607 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:22,608 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:22,673 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-03-10 22:08:22,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:08:22,677 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:22,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:08:22,681 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:22,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:08:22,684 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:22,710 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:22,711 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:08:22,712 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 4 variables, input treesize:591, output treesize:52 [2021-03-10 22:08:22,808 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:22,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:22,808 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-03-10 22:08:22,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136673787] [2021-03-10 22:08:22,808 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:08:22,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:22,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:08:22,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:08:22,808 INFO L87 Difference]: Start difference. First operand 139 states and 295 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:23,124 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2021-03-10 22:08:23,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:23,246 INFO L93 Difference]: Finished difference Result 169 states and 351 transitions. [2021-03-10 22:08:23,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:08:23,247 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:08:23,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:23,247 INFO L225 Difference]: With dead ends: 169 [2021-03-10 22:08:23,247 INFO L226 Difference]: Without dead ends: 153 [2021-03-10 22:08:23,247 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 682.3ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:08:23,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-03-10 22:08:23,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 141. [2021-03-10 22:08:23,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.1357142857142857) internal successors, (299), 140 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:23,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 299 transitions. [2021-03-10 22:08:23,249 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 299 transitions. Word has length 18 [2021-03-10 22:08:23,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:23,249 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 299 transitions. [2021-03-10 22:08:23,249 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:23,249 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 299 transitions. [2021-03-10 22:08:23,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:08:23,249 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:23,249 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:23,449 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13769,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:23,449 INFO L428 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:23,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:23,450 INFO L82 PathProgramCache]: Analyzing trace with hash 716525898, now seen corresponding path program 228 times [2021-03-10 22:08:23,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:23,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134757727] [2021-03-10 22:08:23,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:23,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:23,655 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:23,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134757727] [2021-03-10 22:08:23,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325603468] [2021-03-10 22:08:23,655 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:23,720 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 22:08:23,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:08:23,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:08:23,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:24,322 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:24,323 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:24,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:24,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:24,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-03-10 22:08:24,329 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:24,333 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:24,334 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:24,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:24,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:24,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:08:24,339 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:24,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:24,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:24,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:08:24,345 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:24,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:24,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:24,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:08:24,350 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:24,354 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:24,355 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:24,358 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:24,359 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:24,362 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:24,363 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:24,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:24,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:24,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-03-10 22:08:24,368 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:24,371 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:24,372 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:24,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:24,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:08:24,376 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:24,442 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-03-10 22:08:24,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:08:24,446 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:24,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:08:24,449 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:24,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:08:24,453 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:24,479 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:24,480 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:08:24,480 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:467, output treesize:52 [2021-03-10 22:08:24,571 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:24,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:24,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-03-10 22:08:24,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924385338] [2021-03-10 22:08:24,571 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:08:24,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:24,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:08:24,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:08:24,572 INFO L87 Difference]: Start difference. First operand 141 states and 299 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:24,985 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2021-03-10 22:08:25,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:25,085 INFO L93 Difference]: Finished difference Result 166 states and 345 transitions. [2021-03-10 22:08:25,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:08:25,086 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:08:25,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:25,086 INFO L225 Difference]: With dead ends: 166 [2021-03-10 22:08:25,086 INFO L226 Difference]: Without dead ends: 153 [2021-03-10 22:08:25,086 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 803.4ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:08:25,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-03-10 22:08:25,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 142. [2021-03-10 22:08:25,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.1347517730496453) internal successors, (301), 141 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:25,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 301 transitions. [2021-03-10 22:08:25,088 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 301 transitions. Word has length 18 [2021-03-10 22:08:25,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:25,088 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 301 transitions. [2021-03-10 22:08:25,088 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:25,088 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 301 transitions. [2021-03-10 22:08:25,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:08:25,088 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:25,088 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:25,288 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13841 [2021-03-10 22:08:25,288 INFO L428 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:25,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:25,289 INFO L82 PathProgramCache]: Analyzing trace with hash 237241222, now seen corresponding path program 229 times [2021-03-10 22:08:25,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:25,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874992968] [2021-03-10 22:08:25,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:25,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:25,506 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:25,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874992968] [2021-03-10 22:08:25,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067826122] [2021-03-10 22:08:25,507 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 22:08:25,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:25,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:08:25,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:26,308 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:26,309 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:26,314 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:26,314 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:26,318 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:26,319 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:26,324 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:26,325 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:26,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:26,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:26,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:08:26,331 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:26,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:26,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:26,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-03-10 22:08:26,337 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:26,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:26,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:26,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-03-10 22:08:26,344 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:26,349 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:26,349 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:26,354 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:26,354 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:26,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:26,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:26,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:08:26,361 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:26,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:26,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:26,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:08:26,368 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:26,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:26,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:26,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:08:26,373 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:26,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:26,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:26,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:08:26,379 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:26,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:26,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:26,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:08:26,385 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:26,389 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:26,389 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:26,393 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:26,394 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:26,510 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 64 [2021-03-10 22:08:26,511 INFO L628 ElimStorePlain]: treesize reduction 18, result has 87.2 percent of original size [2021-03-10 22:08:26,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:08:26,515 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:26,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:08:26,520 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:26,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:08:26,524 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:26,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:08:26,528 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:26,575 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:26,577 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:08:26,577 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 5 variables, input treesize:709, output treesize:79 [2021-03-10 22:08:26,733 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:26,733 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:26,733 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-03-10 22:08:26,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628108488] [2021-03-10 22:08:26,733 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:08:26,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:26,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:08:26,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:08:26,734 INFO L87 Difference]: Start difference. First operand 142 states and 301 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:27,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:27,183 INFO L93 Difference]: Finished difference Result 184 states and 369 transitions. [2021-03-10 22:08:27,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:08:27,183 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:08:27,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:27,184 INFO L225 Difference]: With dead ends: 184 [2021-03-10 22:08:27,184 INFO L226 Difference]: Without dead ends: 165 [2021-03-10 22:08:27,184 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 676.9ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:08:27,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-03-10 22:08:27,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 140. [2021-03-10 22:08:27,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 2.1366906474820144) internal successors, (297), 139 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:27,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 297 transitions. [2021-03-10 22:08:27,185 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 297 transitions. Word has length 18 [2021-03-10 22:08:27,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:27,185 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 297 transitions. [2021-03-10 22:08:27,185 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:27,185 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 297 transitions. [2021-03-10 22:08:27,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:08:27,185 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:27,185 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:27,386 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13897 [2021-03-10 22:08:27,386 INFO L428 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:27,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:27,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1304271220, now seen corresponding path program 230 times [2021-03-10 22:08:27,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:27,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746456381] [2021-03-10 22:08:27,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:27,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:27,581 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:27,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746456381] [2021-03-10 22:08:27,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684745052] [2021-03-10 22:08:27,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 22:08:27,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:08:27,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:08:27,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:08:27,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:27,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:08:27,887 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:27,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:08:27,891 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:27,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:08:27,895 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:27,924 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:27,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:08:27,928 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:27,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:08:27,931 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:27,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:08:27,935 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:27,960 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:27,961 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:08:27,961 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:88, output treesize:52 [2021-03-10 22:08:28,047 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:28,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:28,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-03-10 22:08:28,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519074581] [2021-03-10 22:08:28,047 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:08:28,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:28,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:08:28,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:08:28,047 INFO L87 Difference]: Start difference. First operand 140 states and 297 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:28,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:28,324 INFO L93 Difference]: Finished difference Result 162 states and 333 transitions. [2021-03-10 22:08:28,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:08:28,324 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:08:28,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:28,325 INFO L225 Difference]: With dead ends: 162 [2021-03-10 22:08:28,325 INFO L226 Difference]: Without dead ends: 149 [2021-03-10 22:08:28,325 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 520.3ms TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:08:28,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-03-10 22:08:28,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 142. [2021-03-10 22:08:28,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.1347517730496453) internal successors, (301), 141 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:28,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 301 transitions. [2021-03-10 22:08:28,326 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 301 transitions. Word has length 18 [2021-03-10 22:08:28,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:28,326 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 301 transitions. [2021-03-10 22:08:28,326 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:28,326 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 301 transitions. [2021-03-10 22:08:28,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:08:28,326 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:28,326 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:28,527 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14035,231 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:28,527 INFO L428 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:28,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:28,527 INFO L82 PathProgramCache]: Analyzing trace with hash 824986544, now seen corresponding path program 231 times [2021-03-10 22:08:28,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:28,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092848861] [2021-03-10 22:08:28,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:28,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:28,726 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:28,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092848861] [2021-03-10 22:08:28,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032512715] [2021-03-10 22:08:28,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:28,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 22:08:28,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:08:28,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 22:08:28,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:29,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:08:29,011 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:29,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:08:29,015 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:29,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:08:29,019 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:29,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:08:29,023 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:29,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:08:29,028 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:29,094 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:29,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:08:29,099 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:29,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:08:29,103 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:29,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:08:29,107 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:29,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:08:29,111 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:29,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:08:29,115 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:29,173 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:29,174 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 22:08:29,174 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 3 variables, input treesize:172, output treesize:104 [2021-03-10 22:08:29,371 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:29,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:29,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-03-10 22:08:29,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860724799] [2021-03-10 22:08:29,371 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:08:29,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:29,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:08:29,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:08:29,372 INFO L87 Difference]: Start difference. First operand 142 states and 301 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:29,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:29,766 INFO L93 Difference]: Finished difference Result 184 states and 369 transitions. [2021-03-10 22:08:29,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:08:29,767 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:08:29,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:29,767 INFO L225 Difference]: With dead ends: 184 [2021-03-10 22:08:29,767 INFO L226 Difference]: Without dead ends: 165 [2021-03-10 22:08:29,767 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 665.4ms TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:08:29,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-03-10 22:08:29,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 141. [2021-03-10 22:08:29,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.1357142857142857) internal successors, (299), 140 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:29,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 299 transitions. [2021-03-10 22:08:29,769 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 299 transitions. Word has length 18 [2021-03-10 22:08:29,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:29,769 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 299 transitions. [2021-03-10 22:08:29,769 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:29,769 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 299 transitions. [2021-03-10 22:08:29,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:08:29,769 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:29,769 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:29,971 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14065,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:29,971 INFO L428 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:29,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:29,971 INFO L82 PathProgramCache]: Analyzing trace with hash 289756742, now seen corresponding path program 232 times [2021-03-10 22:08:29,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:29,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950302008] [2021-03-10 22:08:29,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:29,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:30,175 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:30,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950302008] [2021-03-10 22:08:30,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574284825] [2021-03-10 22:08:30,175 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:30,240 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:08:30,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:08:30,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:08:30,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:30,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:08:30,469 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:30,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:08:30,474 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:30,477 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 6 treesize of output 2 [2021-03-10 22:08:30,478 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:30,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:08:30,482 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:30,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:08:30,486 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:30,558 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:30,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:08:30,562 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:30,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:08:30,566 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:30,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:08:30,570 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:30,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:08:30,574 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:30,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:08:30,578 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:30,638 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:30,640 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 22:08:30,640 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 3 variables, input treesize:164, output treesize:96 [2021-03-10 22:08:30,841 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:30,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:30,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-03-10 22:08:30,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859944573] [2021-03-10 22:08:30,842 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:08:30,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:30,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:08:30,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:08:30,842 INFO L87 Difference]: Start difference. First operand 141 states and 299 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:31,290 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 36 [2021-03-10 22:08:31,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:31,495 INFO L93 Difference]: Finished difference Result 197 states and 400 transitions. [2021-03-10 22:08:31,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:08:31,496 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:08:31,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:31,496 INFO L225 Difference]: With dead ends: 197 [2021-03-10 22:08:31,496 INFO L226 Difference]: Without dead ends: 178 [2021-03-10 22:08:31,496 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 888.0ms TimeCoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:08:31,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-03-10 22:08:31,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 143. [2021-03-10 22:08:31,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.140845070422535) internal successors, (304), 142 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:31,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 304 transitions. [2021-03-10 22:08:31,498 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 304 transitions. Word has length 18 [2021-03-10 22:08:31,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:31,498 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 304 transitions. [2021-03-10 22:08:31,498 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:31,498 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 304 transitions. [2021-03-10 22:08:31,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:08:31,498 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:31,498 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:31,712 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14096 [2021-03-10 22:08:31,712 INFO L428 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:31,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:31,713 INFO L82 PathProgramCache]: Analyzing trace with hash -1950460278, now seen corresponding path program 233 times [2021-03-10 22:08:31,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:31,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428565304] [2021-03-10 22:08:31,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:31,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:31,907 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:31,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428565304] [2021-03-10 22:08:31,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840986993] [2021-03-10 22:08:31,908 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:31,977 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:08:31,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:08:31,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:08:31,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:32,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:08:32,182 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:32,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:08:32,186 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:32,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:08:32,190 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:32,220 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:32,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:08:32,223 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:32,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:08:32,227 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:32,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:08:32,230 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:32,256 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:32,257 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:08:32,257 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:84, output treesize:48 [2021-03-10 22:08:32,345 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:32,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:32,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-03-10 22:08:32,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609141070] [2021-03-10 22:08:32,345 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:08:32,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:32,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:08:32,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:08:32,345 INFO L87 Difference]: Start difference. First operand 143 states and 304 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:32,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:32,618 INFO L93 Difference]: Finished difference Result 162 states and 334 transitions. [2021-03-10 22:08:32,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:08:32,619 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:08:32,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:32,619 INFO L225 Difference]: With dead ends: 162 [2021-03-10 22:08:32,619 INFO L226 Difference]: Without dead ends: 149 [2021-03-10 22:08:32,619 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 449.2ms TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:08:32,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-03-10 22:08:32,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 146. [2021-03-10 22:08:32,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.1379310344827585) internal successors, (310), 145 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) [2021-03-10 22:08:32,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 310 transitions. [2021-03-10 22:08:32,620 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 310 transitions. Word has length 18 [2021-03-10 22:08:32,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:32,620 INFO L480 AbstractCegarLoop]: Abstraction has 146 states and 310 transitions. [2021-03-10 22:08:32,620 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:32,620 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 310 transitions. [2021-03-10 22:08:32,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:08:32,621 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:32,621 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:32,821 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 234 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14136 [2021-03-10 22:08:32,821 INFO L428 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:32,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:32,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1865222342, now seen corresponding path program 234 times [2021-03-10 22:08:32,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:32,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377385463] [2021-03-10 22:08:32,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:32,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:33,021 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:33,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377385463] [2021-03-10 22:08:33,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480687865] [2021-03-10 22:08:33,021 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:33,087 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 22:08:33,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:08:33,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:08:33,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:33,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:08:33,306 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:33,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:08:33,311 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:33,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:08:33,315 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:33,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:08:33,319 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:33,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:08:33,324 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:33,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:08:33,328 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:33,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:08:33,333 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:33,506 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2021-03-10 22:08:33,506 INFO L628 ElimStorePlain]: treesize reduction 30, result has 85.1 percent of original size [2021-03-10 22:08:33,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:08:33,511 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:33,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:08:33,515 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:33,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:08:33,519 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:33,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:08:33,523 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:33,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:08:33,527 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:33,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:08:33,531 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:33,603 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:33,605 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-03-10 22:08:33,605 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 3 variables, input treesize:237, output treesize:121 [2021-03-10 22:08:33,809 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:33,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:33,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-03-10 22:08:33,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482049420] [2021-03-10 22:08:33,809 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:08:33,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:33,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:08:33,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:08:33,810 INFO L87 Difference]: Start difference. First operand 146 states and 310 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:34,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:34,193 INFO L93 Difference]: Finished difference Result 188 states and 378 transitions. [2021-03-10 22:08:34,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:08:34,193 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:08:34,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:34,194 INFO L225 Difference]: With dead ends: 188 [2021-03-10 22:08:34,194 INFO L226 Difference]: Without dead ends: 169 [2021-03-10 22:08:34,194 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 679.4ms TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:08:34,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-03-10 22:08:34,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 145. [2021-03-10 22:08:34,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.138888888888889) internal successors, (308), 144 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:34,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 308 transitions. [2021-03-10 22:08:34,195 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 308 transitions. Word has length 18 [2021-03-10 22:08:34,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:34,195 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 308 transitions. [2021-03-10 22:08:34,195 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:34,195 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 308 transitions. [2021-03-10 22:08:34,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:08:34,196 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:34,196 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:34,410 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14171 [2021-03-10 22:08:34,410 INFO L428 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:34,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:34,410 INFO L82 PathProgramCache]: Analyzing trace with hash 1329992540, now seen corresponding path program 235 times [2021-03-10 22:08:34,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:34,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913269996] [2021-03-10 22:08:34,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:34,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:34,619 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:34,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913269996] [2021-03-10 22:08:34,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562971972] [2021-03-10 22:08:34,620 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:34,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:34,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:08:34,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:34,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:08:34,909 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:34,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:08:34,914 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:34,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:08:34,918 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:34,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:08:34,923 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:34,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:08:34,927 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:34,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:08:34,932 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:34,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:08:34,936 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:35,113 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2021-03-10 22:08:35,113 INFO L628 ElimStorePlain]: treesize reduction 30, result has 85.1 percent of original size [2021-03-10 22:08:35,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:08:35,118 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:35,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:08:35,122 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:35,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:08:35,126 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:35,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:08:35,130 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:35,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:08:35,134 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:35,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:08:35,138 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:35,210 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:35,211 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-03-10 22:08:35,211 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 3 variables, input treesize:237, output treesize:121 [2021-03-10 22:08:35,417 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:35,417 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:35,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-03-10 22:08:35,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003592930] [2021-03-10 22:08:35,417 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:08:35,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:35,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:08:35,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:08:35,417 INFO L87 Difference]: Start difference. First operand 145 states and 308 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:36,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:36,172 INFO L93 Difference]: Finished difference Result 223 states and 445 transitions. [2021-03-10 22:08:36,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:08:36,173 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:08:36,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:36,173 INFO L225 Difference]: With dead ends: 223 [2021-03-10 22:08:36,173 INFO L226 Difference]: Without dead ends: 197 [2021-03-10 22:08:36,173 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 993.1ms TimeCoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:08:36,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-03-10 22:08:36,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 146. [2021-03-10 22:08:36,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.1517241379310343) internal successors, (312), 145 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:36,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 312 transitions. [2021-03-10 22:08:36,175 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 312 transitions. Word has length 18 [2021-03-10 22:08:36,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:36,175 INFO L480 AbstractCegarLoop]: Abstraction has 146 states and 312 transitions. [2021-03-10 22:08:36,175 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:36,175 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 312 transitions. [2021-03-10 22:08:36,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:08:36,175 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:36,175 INFO L519 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:36,389 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14206,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:36,389 INFO L428 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:36,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:36,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1361939493, now seen corresponding path program 236 times [2021-03-10 22:08:36,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:36,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554525129] [2021-03-10 22:08:36,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:36,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:36,464 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:08:36,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554525129] [2021-03-10 22:08:36,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381894166] [2021-03-10 22:08:36,465 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:36,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:08:36,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:08:36,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 22:08:36,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:36,840 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:08:36,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:36,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:08:36,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394396922] [2021-03-10 22:08:36,840 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:08:36,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:36,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:08:36,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:08:36,841 INFO L87 Difference]: Start difference. First operand 146 states and 312 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:37,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:37,001 INFO L93 Difference]: Finished difference Result 176 states and 369 transitions. [2021-03-10 22:08:37,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:08:37,001 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:08:37,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:37,002 INFO L225 Difference]: With dead ends: 176 [2021-03-10 22:08:37,002 INFO L226 Difference]: Without dead ends: 176 [2021-03-10 22:08:37,002 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 167.2ms TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:08:37,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-03-10 22:08:37,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 144. [2021-03-10 22:08:37,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.13986013986014) internal successors, (306), 143 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:37,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 306 transitions. [2021-03-10 22:08:37,003 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 306 transitions. Word has length 18 [2021-03-10 22:08:37,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:37,003 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 306 transitions. [2021-03-10 22:08:37,003 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:37,003 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 306 transitions. [2021-03-10 22:08:37,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:08:37,003 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:37,004 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:37,204 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14240,237 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:37,204 INFO L428 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:37,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:37,204 INFO L82 PathProgramCache]: Analyzing trace with hash 1917737862, now seen corresponding path program 237 times [2021-03-10 22:08:37,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:37,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293249716] [2021-03-10 22:08:37,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:37,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:37,457 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:37,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293249716] [2021-03-10 22:08:37,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884036076] [2021-03-10 22:08:37,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:37,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:08:37,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:08:37,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:08:37,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:38,375 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:38,376 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:38,381 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:38,382 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:38,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:38,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:38,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:08:38,389 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:38,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:38,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:38,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-03-10 22:08:38,396 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:38,400 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:38,401 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:38,406 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:38,407 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:38,412 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:38,412 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:38,417 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:38,418 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:38,422 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:38,423 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:38,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:38,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:38,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:08:38,429 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:38,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:38,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:38,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:08:38,435 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:38,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:38,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:38,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:08:38,441 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:38,445 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:38,445 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:38,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:38,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:38,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:08:38,451 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:38,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:38,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:38,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:08:38,457 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:38,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:38,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-03-10 22:08:38,462 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:38,597 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 67 [2021-03-10 22:08:38,597 INFO L628 ElimStorePlain]: treesize reduction 18, result has 88.5 percent of original size [2021-03-10 22:08:38,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:08:38,602 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:38,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:08:38,607 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:38,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:08:38,611 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:38,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:08:38,615 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:38,671 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:38,673 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:08:38,673 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 5 variables, input treesize:777, output treesize:89 [2021-03-10 22:08:38,879 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:38,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:38,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-03-10 22:08:38,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037658774] [2021-03-10 22:08:38,879 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:08:38,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:38,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:08:38,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:08:38,879 INFO L87 Difference]: Start difference. First operand 144 states and 306 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:39,360 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2021-03-10 22:08:39,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:39,392 INFO L93 Difference]: Finished difference Result 183 states and 371 transitions. [2021-03-10 22:08:39,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:08:39,393 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:08:39,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:39,393 INFO L225 Difference]: With dead ends: 183 [2021-03-10 22:08:39,393 INFO L226 Difference]: Without dead ends: 171 [2021-03-10 22:08:39,393 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 853.8ms TimeCoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:08:39,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-03-10 22:08:39,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 147. [2021-03-10 22:08:39,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 2.1506849315068495) internal successors, (314), 146 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:39,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 314 transitions. [2021-03-10 22:08:39,395 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 314 transitions. Word has length 18 [2021-03-10 22:08:39,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:39,395 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 314 transitions. [2021-03-10 22:08:39,395 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:39,395 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 314 transitions. [2021-03-10 22:08:39,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:08:39,395 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:39,395 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:39,595 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14300,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:39,596 INFO L428 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:39,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:39,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1628670876, now seen corresponding path program 238 times [2021-03-10 22:08:39,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:39,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238223947] [2021-03-10 22:08:39,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:39,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:39,894 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:39,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238223947] [2021-03-10 22:08:39,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646611375] [2021-03-10 22:08:39,894 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:39,989 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:08:39,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:08:39,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:08:39,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:40,799 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:40,800 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:40,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:40,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:40,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-03-10 22:08:40,807 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:40,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:40,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:40,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:08:40,813 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:40,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:40,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:40,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:08:40,819 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:40,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:40,825 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:40,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:08:40,826 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:40,830 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:40,831 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:40,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:40,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:40,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:08:40,836 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:40,840 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:40,840 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:40,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:40,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:40,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-03-10 22:08:40,846 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:40,850 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:40,850 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:40,853 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:40,854 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:40,857 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:40,858 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:40,925 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-03-10 22:08:40,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:08:40,929 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:40,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:08:40,932 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:40,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:08:40,936 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:40,963 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:40,964 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:08:40,964 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:467, output treesize:52 [2021-03-10 22:08:41,059 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:41,059 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:41,059 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-03-10 22:08:41,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544135633] [2021-03-10 22:08:41,059 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:08:41,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:41,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:08:41,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:08:41,059 INFO L87 Difference]: Start difference. First operand 147 states and 314 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:41,444 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2021-03-10 22:08:41,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:41,572 INFO L93 Difference]: Finished difference Result 178 states and 372 transitions. [2021-03-10 22:08:41,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:08:41,572 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:08:41,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:41,573 INFO L225 Difference]: With dead ends: 178 [2021-03-10 22:08:41,573 INFO L226 Difference]: Without dead ends: 162 [2021-03-10 22:08:41,573 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 884.6ms TimeCoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:08:41,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-03-10 22:08:41,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 150. [2021-03-10 22:08:41,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.1476510067114094) internal successors, (320), 149 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:41,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 320 transitions. [2021-03-10 22:08:41,574 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 320 transitions. Word has length 18 [2021-03-10 22:08:41,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:41,574 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 320 transitions. [2021-03-10 22:08:41,574 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:41,574 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 320 transitions. [2021-03-10 22:08:41,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:08:41,574 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:41,575 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:41,775 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14490,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:41,775 INFO L428 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:41,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:41,775 INFO L82 PathProgramCache]: Analyzing trace with hash -344252192, now seen corresponding path program 239 times [2021-03-10 22:08:41,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:41,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144499645] [2021-03-10 22:08:41,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:41,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:42,041 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:42,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144499645] [2021-03-10 22:08:42,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251777580] [2021-03-10 22:08:42,041 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:42,111 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 22:08:42,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:08:42,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:08:42,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:42,912 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:42,913 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:42,917 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:42,918 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:42,922 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:42,923 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:42,927 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:42,928 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:42,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:42,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:42,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:08:42,934 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:42,939 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:42,940 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:42,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:08:42,941 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:42,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:42,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:42,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-03-10 22:08:42,947 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:42,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:42,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:42,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:08:42,953 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:42,957 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:42,958 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:42,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:42,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:42,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-03-10 22:08:42,964 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:42,967 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:42,967 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:42,971 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:42,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:08:42,972 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:43,038 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-03-10 22:08:43,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:08:43,042 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:43,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:08:43,046 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:43,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:08:43,049 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:43,076 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:43,077 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:08:43,077 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:467, output treesize:52 [2021-03-10 22:08:43,172 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:43,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:43,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-03-10 22:08:43,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672596740] [2021-03-10 22:08:43,172 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:08:43,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:43,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:08:43,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:08:43,173 INFO L87 Difference]: Start difference. First operand 150 states and 320 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:43,726 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2021-03-10 22:08:43,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:43,766 INFO L93 Difference]: Finished difference Result 174 states and 360 transitions. [2021-03-10 22:08:43,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:08:43,767 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:08:43,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:43,767 INFO L225 Difference]: With dead ends: 174 [2021-03-10 22:08:43,767 INFO L226 Difference]: Without dead ends: 161 [2021-03-10 22:08:43,767 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 957.8ms TimeCoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:08:43,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-03-10 22:08:43,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 150. [2021-03-10 22:08:43,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.1476510067114094) internal successors, (320), 149 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:43,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 320 transitions. [2021-03-10 22:08:43,769 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 320 transitions. Word has length 18 [2021-03-10 22:08:43,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:43,769 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 320 transitions. [2021-03-10 22:08:43,769 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:43,769 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 320 transitions. [2021-03-10 22:08:43,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:08:43,769 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:43,769 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:43,969 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14633 [2021-03-10 22:08:43,969 INFO L428 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:43,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:43,970 INFO L82 PathProgramCache]: Analyzing trace with hash -823536868, now seen corresponding path program 240 times [2021-03-10 22:08:43,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:43,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103333779] [2021-03-10 22:08:43,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:43,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:44,191 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:44,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103333779] [2021-03-10 22:08:44,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270642028] [2021-03-10 22:08:44,192 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:44,259 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 22:08:44,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:08:44,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:08:44,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:45,179 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:45,180 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:45,185 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:45,185 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:45,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:45,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:45,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-03-10 22:08:45,192 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:45,197 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:45,198 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:45,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:45,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:45,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-03-10 22:08:45,205 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:45,209 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:45,210 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:45,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:45,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:45,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:08:45,216 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:45,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:45,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:45,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:08:45,222 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:45,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:45,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:45,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:08:45,228 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:45,233 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:45,233 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:45,238 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:45,238 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:45,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:45,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:45,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:08:45,245 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:45,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:45,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:45,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:08:45,250 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:45,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:45,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:45,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:08:45,256 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:45,261 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:45,261 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:45,265 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:45,266 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:45,386 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2021-03-10 22:08:45,386 INFO L628 ElimStorePlain]: treesize reduction 18, result has 87.2 percent of original size [2021-03-10 22:08:45,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:08:45,391 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:45,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:08:45,395 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:45,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:08:45,400 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:45,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:08:45,403 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:45,452 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:45,453 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:08:45,453 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 5 variables, input treesize:709, output treesize:79 [2021-03-10 22:08:45,617 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:45,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:45,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-03-10 22:08:45,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598374695] [2021-03-10 22:08:45,617 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:08:45,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:45,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:08:45,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:08:45,618 INFO L87 Difference]: Start difference. First operand 150 states and 320 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:46,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:46,091 INFO L93 Difference]: Finished difference Result 193 states and 390 transitions. [2021-03-10 22:08:46,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:08:46,091 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:08:46,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:46,092 INFO L225 Difference]: With dead ends: 193 [2021-03-10 22:08:46,092 INFO L226 Difference]: Without dead ends: 174 [2021-03-10 22:08:46,092 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 709.8ms TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:08:46,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-03-10 22:08:46,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 149. [2021-03-10 22:08:46,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.1486486486486487) internal successors, (318), 148 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:46,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 318 transitions. [2021-03-10 22:08:46,093 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 318 transitions. Word has length 18 [2021-03-10 22:08:46,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:46,093 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 318 transitions. [2021-03-10 22:08:46,093 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:46,093 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 318 transitions. [2021-03-10 22:08:46,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:08:46,093 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:46,093 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:46,294 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14804,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:46,294 INFO L428 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:46,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:46,294 INFO L82 PathProgramCache]: Analyzing trace with hash 243493130, now seen corresponding path program 241 times [2021-03-10 22:08:46,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:46,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829538928] [2021-03-10 22:08:46,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:46,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:46,558 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:46,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829538928] [2021-03-10 22:08:46,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383240219] [2021-03-10 22:08:46,558 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:46,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:46,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:08:46,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:46,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:08:46,871 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:46,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:08:46,874 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:46,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:08:46,878 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:46,908 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:46,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:08:46,911 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:46,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:08:46,915 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:46,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:08:46,918 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:46,944 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:46,945 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:08:46,945 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:88, output treesize:52 [2021-03-10 22:08:47,033 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:47,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:47,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-03-10 22:08:47,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200849992] [2021-03-10 22:08:47,034 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:08:47,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:47,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:08:47,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:08:47,034 INFO L87 Difference]: Start difference. First operand 149 states and 318 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:47,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:47,315 INFO L93 Difference]: Finished difference Result 167 states and 346 transitions. [2021-03-10 22:08:47,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:08:47,316 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:08:47,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:47,316 INFO L225 Difference]: With dead ends: 167 [2021-03-10 22:08:47,316 INFO L226 Difference]: Without dead ends: 154 [2021-03-10 22:08:47,316 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 6 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 601.1ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:08:47,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-03-10 22:08:47,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 150. [2021-03-10 22:08:47,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.1476510067114094) internal successors, (320), 149 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:47,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 320 transitions. [2021-03-10 22:08:47,318 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 320 transitions. Word has length 18 [2021-03-10 22:08:47,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:47,318 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 320 transitions. [2021-03-10 22:08:47,318 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:47,318 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 320 transitions. [2021-03-10 22:08:47,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:08:47,318 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:47,318 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:47,518 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 242 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15027 [2021-03-10 22:08:47,518 INFO L428 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:47,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:47,518 INFO L82 PathProgramCache]: Analyzing trace with hash -235791546, now seen corresponding path program 242 times [2021-03-10 22:08:47,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:47,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060636533] [2021-03-10 22:08:47,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:47,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:47,725 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:47,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060636533] [2021-03-10 22:08:47,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109739926] [2021-03-10 22:08:47,725 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 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 [2021-03-10 22:08:47,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:08:47,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:08:47,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:08:47,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:48,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:08:48,016 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:48,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:08:48,020 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:48,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:08:48,024 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:48,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:08:48,028 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:48,084 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:48,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:08:48,088 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:48,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:08:48,092 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:48,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:08:48,095 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:48,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:08:48,099 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:48,147 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:48,148 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:08:48,149 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:131, output treesize:75 [2021-03-10 22:08:48,305 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:48,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:48,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-03-10 22:08:48,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792473413] [2021-03-10 22:08:48,306 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:08:48,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:48,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:08:48,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:08:48,306 INFO L87 Difference]: Start difference. First operand 150 states and 320 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:48,862 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 36 [2021-03-10 22:08:49,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:49,069 INFO L93 Difference]: Finished difference Result 212 states and 429 transitions. [2021-03-10 22:08:49,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:08:49,070 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:08:49,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:49,070 INFO L225 Difference]: With dead ends: 212 [2021-03-10 22:08:49,070 INFO L226 Difference]: Without dead ends: 186 [2021-03-10 22:08:49,070 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 965.5ms TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:08:49,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-03-10 22:08:49,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 150. [2021-03-10 22:08:49,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.1476510067114094) internal successors, (320), 149 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:49,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 320 transitions. [2021-03-10 22:08:49,072 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 320 transitions. Word has length 18 [2021-03-10 22:08:49,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:49,072 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 320 transitions. [2021-03-10 22:08:49,072 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:49,072 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 320 transitions. [2021-03-10 22:08:49,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:08:49,072 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:49,072 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:49,272 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15061 [2021-03-10 22:08:49,273 INFO L428 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:49,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:49,273 INFO L82 PathProgramCache]: Analyzing trace with hash -771021348, now seen corresponding path program 243 times [2021-03-10 22:08:49,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:49,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249549465] [2021-03-10 22:08:49,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:49,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:49,485 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:49,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249549465] [2021-03-10 22:08:49,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271505344] [2021-03-10 22:08:49,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 22:08:49,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 22:08:49,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:08:49,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:08:49,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:49,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:08:49,780 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:49,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:08:49,785 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:49,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:08:49,790 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:49,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:08:49,795 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:49,855 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:49,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:08:49,859 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:49,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:08:49,863 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:49,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:08:49,867 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:49,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:08:49,871 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:49,920 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:49,921 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:08:49,921 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:131, output treesize:75 [2021-03-10 22:08:50,082 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:50,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:50,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-03-10 22:08:50,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209679959] [2021-03-10 22:08:50,082 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:08:50,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:50,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:08:50,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:08:50,082 INFO L87 Difference]: Start difference. First operand 150 states and 320 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:50,658 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 36 [2021-03-10 22:08:50,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:50,876 INFO L93 Difference]: Finished difference Result 225 states and 451 transitions. [2021-03-10 22:08:50,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:08:50,876 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:08:50,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:50,876 INFO L225 Difference]: With dead ends: 225 [2021-03-10 22:08:50,876 INFO L226 Difference]: Without dead ends: 199 [2021-03-10 22:08:50,876 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 994.1ms TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:08:50,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-03-10 22:08:50,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 149. [2021-03-10 22:08:50,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.1486486486486487) internal successors, (318), 148 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:50,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 318 transitions. [2021-03-10 22:08:50,878 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 318 transitions. Word has length 18 [2021-03-10 22:08:50,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:50,878 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 318 transitions. [2021-03-10 22:08:50,878 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:50,878 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 318 transitions. [2021-03-10 22:08:50,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:08:50,878 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:50,878 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:51,078 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15097,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:51,079 INFO L428 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:51,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:51,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1283728928, now seen corresponding path program 244 times [2021-03-10 22:08:51,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:51,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480819660] [2021-03-10 22:08:51,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:51,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:51,283 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:51,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480819660] [2021-03-10 22:08:51,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919788086] [2021-03-10 22:08:51,284 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:51,351 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:08:51,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:08:51,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:08:51,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:51,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:08:51,591 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:51,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:08:51,595 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:51,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:08:51,598 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:51,629 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:51,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:08:51,633 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:51,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:08:51,636 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:51,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:08:51,639 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:51,665 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:51,666 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:08:51,666 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:88, output treesize:52 [2021-03-10 22:08:51,757 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:51,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:51,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-03-10 22:08:51,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127073482] [2021-03-10 22:08:51,758 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:08:51,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:51,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:08:51,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:08:51,758 INFO L87 Difference]: Start difference. First operand 149 states and 318 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:52,060 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2021-03-10 22:08:52,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:52,084 INFO L93 Difference]: Finished difference Result 172 states and 356 transitions. [2021-03-10 22:08:52,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:08:52,084 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:08:52,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:52,084 INFO L225 Difference]: With dead ends: 172 [2021-03-10 22:08:52,084 INFO L226 Difference]: Without dead ends: 159 [2021-03-10 22:08:52,084 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 6 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 550.6ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:08:52,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-03-10 22:08:52,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 151. [2021-03-10 22:08:52,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.1466666666666665) internal successors, (322), 150 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:52,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 322 transitions. [2021-03-10 22:08:52,086 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 322 transitions. Word has length 18 [2021-03-10 22:08:52,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:52,086 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 322 transitions. [2021-03-10 22:08:52,086 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:52,086 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 322 transitions. [2021-03-10 22:08:52,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:08:52,086 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:52,086 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:52,295 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15125,245 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:52,295 INFO L428 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:52,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:52,295 INFO L82 PathProgramCache]: Analyzing trace with hash 804444252, now seen corresponding path program 245 times [2021-03-10 22:08:52,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:52,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279360832] [2021-03-10 22:08:52,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:52,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:52,500 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:52,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279360832] [2021-03-10 22:08:52,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083074005] [2021-03-10 22:08:52,501 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:52,569 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 22:08:52,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:08:52,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:08:52,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:52,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:08:52,789 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:52,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:08:52,793 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:52,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:08:52,798 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:52,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:08:52,801 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:52,858 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:52,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:08:52,862 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:52,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:08:52,865 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:52,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:08:52,869 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:52,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:08:52,873 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:52,921 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:52,922 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:08:52,923 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:135, output treesize:79 [2021-03-10 22:08:53,079 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:53,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:53,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-03-10 22:08:53,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078206640] [2021-03-10 22:08:53,080 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:08:53,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:53,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:08:53,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:08:53,080 INFO L87 Difference]: Start difference. First operand 151 states and 322 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:53,456 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 36 [2021-03-10 22:08:53,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:53,563 INFO L93 Difference]: Finished difference Result 194 states and 392 transitions. [2021-03-10 22:08:53,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:08:53,563 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:08:53,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:53,564 INFO L225 Difference]: With dead ends: 194 [2021-03-10 22:08:53,564 INFO L226 Difference]: Without dead ends: 175 [2021-03-10 22:08:53,564 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 676.0ms TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:08:53,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-03-10 22:08:53,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 151. [2021-03-10 22:08:53,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.1466666666666665) internal successors, (322), 150 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:53,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 322 transitions. [2021-03-10 22:08:53,565 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 322 transitions. Word has length 18 [2021-03-10 22:08:53,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:53,565 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 322 transitions. [2021-03-10 22:08:53,565 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:53,565 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 322 transitions. [2021-03-10 22:08:53,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:08:53,566 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:53,566 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:53,766 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15152,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:53,766 INFO L428 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:53,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:53,766 INFO L82 PathProgramCache]: Analyzing trace with hash 269214450, now seen corresponding path program 246 times [2021-03-10 22:08:53,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:53,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277867507] [2021-03-10 22:08:53,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:53,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:53,968 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:53,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277867507] [2021-03-10 22:08:53,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095113103] [2021-03-10 22:08:53,968 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:54,037 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 22:08:54,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:08:54,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:08:54,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:54,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:08:54,200 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:54,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:08:54,204 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:54,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:08:54,207 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:54,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:08:54,211 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:54,268 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:54,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:08:54,272 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:54,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:08:54,276 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:54,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:08:54,280 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:54,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:08:54,284 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:54,332 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:54,334 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:08:54,334 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:135, output treesize:79 [2021-03-10 22:08:54,492 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:54,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:54,492 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-03-10 22:08:54,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175566104] [2021-03-10 22:08:54,492 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:08:54,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:54,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:08:54,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:08:54,493 INFO L87 Difference]: Start difference. First operand 151 states and 322 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:54,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:54,788 INFO L93 Difference]: Finished difference Result 172 states and 358 transitions. [2021-03-10 22:08:54,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:08:54,789 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:08:54,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:54,789 INFO L225 Difference]: With dead ends: 172 [2021-03-10 22:08:54,789 INFO L226 Difference]: Without dead ends: 160 [2021-03-10 22:08:54,789 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 6 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 503.8ms TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:08:54,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-03-10 22:08:54,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 151. [2021-03-10 22:08:54,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.1466666666666665) internal successors, (322), 150 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:54,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 322 transitions. [2021-03-10 22:08:54,791 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 322 transitions. Word has length 18 [2021-03-10 22:08:54,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:54,791 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 322 transitions. [2021-03-10 22:08:54,791 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:54,791 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 322 transitions. [2021-03-10 22:08:54,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:08:54,791 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:54,791 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:54,991 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15188,247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:54,991 INFO L428 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:54,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:54,992 INFO L82 PathProgramCache]: Analyzing trace with hash 856959772, now seen corresponding path program 247 times [2021-03-10 22:08:54,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:54,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006662726] [2021-03-10 22:08:54,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:54,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:55,222 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:55,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006662726] [2021-03-10 22:08:55,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885952055] [2021-03-10 22:08:55,223 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 22:08:55,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:55,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:08:55,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:55,479 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2021-03-10 22:08:56,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:56,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:56,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:08:56,346 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:56,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:56,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:56,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-03-10 22:08:56,354 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:56,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:56,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:56,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:08:56,361 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:56,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:56,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:56,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-03-10 22:08:56,369 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:56,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:56,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:56,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:08:56,376 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:56,382 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:56,383 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:56,388 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:56,388 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:56,394 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:56,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:56,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:08:56,396 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:56,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:56,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:56,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:08:56,403 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:56,408 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:56,408 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:56,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:56,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:56,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:08:56,415 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:56,420 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:56,421 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:56,426 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:56,427 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:56,431 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:56,432 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:56,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:56,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:56,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-03-10 22:08:56,439 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:56,444 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:56,445 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:56,449 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:56,450 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:56,454 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:56,454 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:56,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:56,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:08:56,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:08:56,461 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:56,465 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:08:56,466 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:56,649 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 75 [2021-03-10 22:08:56,649 INFO L628 ElimStorePlain]: treesize reduction 22, result has 88.9 percent of original size [2021-03-10 22:08:56,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:08:56,654 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:56,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:08:56,659 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:56,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:08:56,663 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:56,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:08:56,668 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:56,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:08:56,672 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:56,746 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:56,748 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 22:08:56,748 INFO L247 ElimStorePlain]: Needed 26 recursive calls to eliminate 5 variables, input treesize:981, output treesize:110 [2021-03-10 22:08:57,003 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:57,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:57,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-03-10 22:08:57,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133118797] [2021-03-10 22:08:57,003 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:08:57,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:57,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:08:57,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:08:57,003 INFO L87 Difference]: Start difference. First operand 151 states and 322 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:57,139 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 43 [2021-03-10 22:08:57,642 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 44 [2021-03-10 22:08:57,786 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2021-03-10 22:08:58,045 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 47 [2021-03-10 22:08:58,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:58,259 INFO L93 Difference]: Finished difference Result 255 states and 506 transitions. [2021-03-10 22:08:58,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 22:08:58,260 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:08:58,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:58,260 INFO L225 Difference]: With dead ends: 255 [2021-03-10 22:08:58,260 INFO L226 Difference]: Without dead ends: 222 [2021-03-10 22:08:58,260 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1587.7ms TimeCoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2021-03-10 22:08:58,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-03-10 22:08:58,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 151. [2021-03-10 22:08:58,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.1466666666666665) internal successors, (322), 150 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:58,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 322 transitions. [2021-03-10 22:08:58,262 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 322 transitions. Word has length 18 [2021-03-10 22:08:58,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:58,262 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 322 transitions. [2021-03-10 22:08:58,262 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:58,262 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 322 transitions. [2021-03-10 22:08:58,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:08:58,262 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:58,262 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:58,462 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 248 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15214 [2021-03-10 22:08:58,463 INFO L428 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:58,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:58,463 INFO L82 PathProgramCache]: Analyzing trace with hash -828699702, now seen corresponding path program 248 times [2021-03-10 22:08:58,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:58,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580914278] [2021-03-10 22:08:58,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:58,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:08:58,679 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:58,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580914278] [2021-03-10 22:08:58,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961280447] [2021-03-10 22:08:58,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 22:08:58,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:08:58,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:08:58,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:08:58,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:08:59,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:08:59,045 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:59,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:08:59,049 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:59,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:08:59,053 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:59,083 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:59,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:08:59,087 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:59,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:08:59,091 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:59,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:08:59,094 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:08:59,120 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:08:59,121 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:08:59,121 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:92, output treesize:56 [2021-03-10 22:08:59,217 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:08:59,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:08:59,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-03-10 22:08:59,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646881360] [2021-03-10 22:08:59,218 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:08:59,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:08:59,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:08:59,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:08:59,218 INFO L87 Difference]: Start difference. First operand 151 states and 322 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:59,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:08:59,696 INFO L93 Difference]: Finished difference Result 178 states and 371 transitions. [2021-03-10 22:08:59,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:08:59,696 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:08:59,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:08:59,696 INFO L225 Difference]: With dead ends: 178 [2021-03-10 22:08:59,696 INFO L226 Difference]: Without dead ends: 165 [2021-03-10 22:08:59,697 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 728.6ms TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:08:59,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-03-10 22:08:59,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 154. [2021-03-10 22:08:59,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.1437908496732025) internal successors, (328), 153 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:59,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 328 transitions. [2021-03-10 22:08:59,698 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 328 transitions. Word has length 18 [2021-03-10 22:08:59,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:08:59,698 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 328 transitions. [2021-03-10 22:08:59,698 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:08:59,698 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 328 transitions. [2021-03-10 22:08:59,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:08:59,698 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:08:59,698 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:08:59,898 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15477,249 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:08:59,899 INFO L428 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:08:59,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:08:59,899 INFO L82 PathProgramCache]: Analyzing trace with hash -1307984378, now seen corresponding path program 249 times [2021-03-10 22:08:59,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:08:59,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549123739] [2021-03-10 22:08:59,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:08:59,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:00,140 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:00,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549123739] [2021-03-10 22:09:00,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904708653] [2021-03-10 22:09:00,141 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:00,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 22:09:00,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:09:00,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:09:00,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:00,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:09:00,377 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:00,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:09:00,381 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:00,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:09:00,385 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:00,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:09:00,389 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:00,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:09:00,394 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:00,465 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:00,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:09:00,470 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:00,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:09:00,474 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:00,477 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 5 treesize of output 1 [2021-03-10 22:09:00,478 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:00,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:09:00,482 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:00,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:09:00,486 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:00,545 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:00,546 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 22:09:00,546 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 3 variables, input treesize:168, output treesize:100 [2021-03-10 22:09:00,753 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:00,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:00,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-03-10 22:09:00,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311648144] [2021-03-10 22:09:00,754 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:09:00,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:00,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:09:00,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:09:00,754 INFO L87 Difference]: Start difference. First operand 154 states and 328 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:01,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:09:01,216 INFO L93 Difference]: Finished difference Result 197 states and 398 transitions. [2021-03-10 22:09:01,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:09:01,216 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:09:01,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:09:01,216 INFO L225 Difference]: With dead ends: 197 [2021-03-10 22:09:01,217 INFO L226 Difference]: Without dead ends: 178 [2021-03-10 22:09:01,217 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 730.9ms TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:09:01,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-03-10 22:09:01,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 154. [2021-03-10 22:09:01,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.1437908496732025) internal successors, (328), 153 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:01,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 328 transitions. [2021-03-10 22:09:01,218 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 328 transitions. Word has length 18 [2021-03-10 22:09:01,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:09:01,218 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 328 transitions. [2021-03-10 22:09:01,218 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:01,218 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 328 transitions. [2021-03-10 22:09:01,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:09:01,218 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:09:01,218 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:09:01,423 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15507 [2021-03-10 22:09:01,423 INFO L428 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:09:01,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:09:01,423 INFO L82 PathProgramCache]: Analyzing trace with hash -1843214180, now seen corresponding path program 250 times [2021-03-10 22:09:01,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:09:01,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525498487] [2021-03-10 22:09:01,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:09:01,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:01,633 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:01,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525498487] [2021-03-10 22:09:01,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237020880] [2021-03-10 22:09:01,633 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:01,704 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:09:01,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:09:01,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:09:01,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:01,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:09:01,928 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:01,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:09:01,933 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:01,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:09:01,937 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:01,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:09:01,941 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:01,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:09:01,946 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:02,016 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:02,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:09:02,021 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:02,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:09:02,025 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:02,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:09:02,029 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:02,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:09:02,033 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:02,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:09:02,037 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:02,097 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:02,098 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 22:09:02,098 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 3 variables, input treesize:172, output treesize:104 [2021-03-10 22:09:02,304 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:02,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:02,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-03-10 22:09:02,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627640693] [2021-03-10 22:09:02,304 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:09:02,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:02,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:09:02,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:09:02,305 INFO L87 Difference]: Start difference. First operand 154 states and 328 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:02,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:09:02,743 INFO L93 Difference]: Finished difference Result 194 states and 401 transitions. [2021-03-10 22:09:02,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:09:02,744 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:09:02,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:09:02,745 INFO L225 Difference]: With dead ends: 194 [2021-03-10 22:09:02,745 INFO L226 Difference]: Without dead ends: 175 [2021-03-10 22:09:02,745 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 701.5ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:09:02,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-03-10 22:09:02,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 155. [2021-03-10 22:09:02,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.155844155844156) internal successors, (332), 154 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:02,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 332 transitions. [2021-03-10 22:09:02,761 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 332 transitions. Word has length 18 [2021-03-10 22:09:02,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:09:02,761 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 332 transitions. [2021-03-10 22:09:02,761 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:02,761 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 332 transitions. [2021-03-10 22:09:02,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:09:02,761 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:09:02,762 INFO L519 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:09:02,975 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15528 [2021-03-10 22:09:02,975 INFO L428 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:09:02,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:09:02,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1811267227, now seen corresponding path program 251 times [2021-03-10 22:09:02,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:09:02,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220687074] [2021-03-10 22:09:02,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:09:02,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:03,047 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:09:03,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220687074] [2021-03-10 22:09:03,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262244701] [2021-03-10 22:09:03,048 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:03,116 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 22:09:03,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:09:03,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 22:09:03,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:03,332 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:09:03,332 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:03,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-03-10 22:09:03,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926557682] [2021-03-10 22:09:03,333 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:09:03,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:03,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:09:03,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:09:03,333 INFO L87 Difference]: Start difference. First operand 155 states and 332 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:03,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:09:03,619 INFO L93 Difference]: Finished difference Result 182 states and 384 transitions. [2021-03-10 22:09:03,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:09:03,620 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:09:03,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:09:03,620 INFO L225 Difference]: With dead ends: 182 [2021-03-10 22:09:03,620 INFO L226 Difference]: Without dead ends: 182 [2021-03-10 22:09:03,620 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 303.8ms TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:09:03,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-03-10 22:09:03,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 153. [2021-03-10 22:09:03,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.1447368421052633) internal successors, (326), 152 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:03,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 326 transitions. [2021-03-10 22:09:03,622 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 326 transitions. Word has length 18 [2021-03-10 22:09:03,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:09:03,622 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 326 transitions. [2021-03-10 22:09:03,622 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:03,622 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 326 transitions. [2021-03-10 22:09:03,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:09:03,622 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:09:03,622 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:09:03,822 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15561 [2021-03-10 22:09:03,823 INFO L428 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:09:03,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:09:03,823 INFO L82 PathProgramCache]: Analyzing trace with hash -1255468858, now seen corresponding path program 252 times [2021-03-10 22:09:03,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:09:03,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691193312] [2021-03-10 22:09:03,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:09:03,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:04,055 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:04,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691193312] [2021-03-10 22:09:04,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773769336] [2021-03-10 22:09:04,055 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 22:09:04,126 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:09:04,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:09:04,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:09:04,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:04,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:04,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:04,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:09:04,959 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:04,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:04,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:04,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-03-10 22:09:04,967 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:04,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:04,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:04,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-03-10 22:09:04,974 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:04,979 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:09:04,980 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:04,986 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:09:04,987 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:04,992 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:09:04,992 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:04,998 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:09:04,998 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:05,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:05,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:05,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:09:05,005 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:05,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:05,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:05,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:09:05,012 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:05,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:05,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:05,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:09:05,019 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:05,024 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:09:05,025 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:05,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:05,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:05,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:09:05,032 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:05,036 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:09:05,037 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:05,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:05,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:05,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:09:05,044 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:05,048 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:09:05,049 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:05,054 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:09:05,054 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:05,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:05,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:05,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-03-10 22:09:05,061 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:05,065 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:09:05,066 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:05,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:05,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:05,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:09:05,072 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:05,076 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:09:05,077 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:05,255 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 71 [2021-03-10 22:09:05,256 INFO L628 ElimStorePlain]: treesize reduction 24, result has 87.9 percent of original size [2021-03-10 22:09:05,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:09:05,261 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:05,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:09:05,265 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:05,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:09:05,270 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:05,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:09:05,275 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:05,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:09:05,279 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:05,353 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:05,355 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 22:09:05,355 INFO L247 ElimStorePlain]: Needed 26 recursive calls to eliminate 5 variables, input treesize:981, output treesize:110 [2021-03-10 22:09:05,616 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:05,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:05,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-03-10 22:09:05,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220154433] [2021-03-10 22:09:05,616 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:09:05,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:05,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:09:05,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:09:05,616 INFO L87 Difference]: Start difference. First operand 153 states and 326 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:05,745 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 41 [2021-03-10 22:09:06,226 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 42 [2021-03-10 22:09:06,370 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2021-03-10 22:09:06,621 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 45 [2021-03-10 22:09:06,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:09:06,830 INFO L93 Difference]: Finished difference Result 257 states and 510 transitions. [2021-03-10 22:09:06,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 22:09:06,831 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:09:06,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:09:06,831 INFO L225 Difference]: With dead ends: 257 [2021-03-10 22:09:06,831 INFO L226 Difference]: Without dead ends: 224 [2021-03-10 22:09:06,831 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1513.5ms TimeCoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2021-03-10 22:09:06,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-03-10 22:09:06,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 153. [2021-03-10 22:09:06,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.1447368421052633) internal successors, (326), 152 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:06,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 326 transitions. [2021-03-10 22:09:06,833 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 326 transitions. Word has length 18 [2021-03-10 22:09:06,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:09:06,833 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 326 transitions. [2021-03-10 22:09:06,833 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:06,833 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 326 transitions. [2021-03-10 22:09:06,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:09:06,833 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:09:06,833 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:09:07,034 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15593,253 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:07,034 INFO L428 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:09:07,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:09:07,034 INFO L82 PathProgramCache]: Analyzing trace with hash -215233060, now seen corresponding path program 253 times [2021-03-10 22:09:07,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:09:07,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066790712] [2021-03-10 22:09:07,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:09:07,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:07,317 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:07,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066790712] [2021-03-10 22:09:07,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137242374] [2021-03-10 22:09:07,317 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:07,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:07,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:09:07,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:08,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:08,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:08,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-03-10 22:09:08,503 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:08,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:08,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:08,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:09:08,510 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:08,516 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:09:08,517 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:08,522 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:09:08,523 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:08,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:08,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:08,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:09:08,530 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:08,535 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:09:08,536 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:08,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:08,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:08,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-03-10 22:09:08,543 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:08,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:08,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:08,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-03-10 22:09:08,550 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:08,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:08,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:08,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:09:08,567 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:08,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:08,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:08,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:09:08,574 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:08,579 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:09:08,580 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:08,585 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:09:08,585 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:08,590 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:09:08,591 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:08,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:08,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:08,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:09:08,597 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:08,602 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:09:08,603 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:08,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:08,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:08,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:09:08,609 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:08,613 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:08,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:08,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:09:08,615 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:08,619 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:09:08,620 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:08,624 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:09:08,625 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:08,629 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:09:08,630 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:08,815 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 72 [2021-03-10 22:09:08,816 INFO L628 ElimStorePlain]: treesize reduction 24, result has 87.9 percent of original size [2021-03-10 22:09:08,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:09:08,821 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:08,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:09:08,826 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:08,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:09:08,832 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:08,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:09:08,836 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:08,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:09:08,841 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:08,917 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:08,919 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 22:09:08,920 INFO L247 ElimStorePlain]: Needed 26 recursive calls to eliminate 5 variables, input treesize:981, output treesize:110 [2021-03-10 22:09:09,189 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:09,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:09,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-03-10 22:09:09,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496322112] [2021-03-10 22:09:09,189 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:09:09,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:09,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:09:09,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:09:09,189 INFO L87 Difference]: Start difference. First operand 153 states and 326 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:09,645 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2021-03-10 22:09:09,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:09:09,746 INFO L93 Difference]: Finished difference Result 189 states and 396 transitions. [2021-03-10 22:09:09,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:09:09,747 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:09:09,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:09:09,747 INFO L225 Difference]: With dead ends: 189 [2021-03-10 22:09:09,747 INFO L226 Difference]: Without dead ends: 177 [2021-03-10 22:09:09,747 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1004.1ms TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:09:09,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-03-10 22:09:09,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 154. [2021-03-10 22:09:09,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.150326797385621) internal successors, (329), 153 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) [2021-03-10 22:09:09,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 329 transitions. [2021-03-10 22:09:09,749 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 329 transitions. Word has length 18 [2021-03-10 22:09:09,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:09:09,749 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 329 transitions. [2021-03-10 22:09:09,749 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:09,749 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 329 transitions. [2021-03-10 22:09:09,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:09:09,749 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:09:09,749 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:09:09,955 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15800,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:09,955 INFO L428 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:09:09,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:09:09,955 INFO L82 PathProgramCache]: Analyzing trace with hash -1459425270, now seen corresponding path program 254 times [2021-03-10 22:09:09,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:09:09,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132601395] [2021-03-10 22:09:09,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:09:09,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:10,181 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:10,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132601395] [2021-03-10 22:09:10,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670085391] [2021-03-10 22:09:10,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:10,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:09:10,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:09:10,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:09:10,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:10,959 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:09:10,960 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:10,964 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:09:10,965 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:10,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:10,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:10,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-03-10 22:09:10,972 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:10,975 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:09:10,976 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:10,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:10,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:10,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:09:10,982 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:10,986 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:09:10,987 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:10,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:10,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:10,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-03-10 22:09:10,993 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:10,997 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:09:10,997 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:11,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:11,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:11,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:09:11,003 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:11,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:11,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:11,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:09:11,008 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:11,011 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:09:11,012 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:11,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:11,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:09:11,016 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:11,084 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-03-10 22:09:11,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:09:11,089 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:11,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:09:11,092 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:11,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:09:11,096 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:11,124 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:11,125 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:09:11,125 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:467, output treesize:52 [2021-03-10 22:09:11,221 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:11,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:11,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-03-10 22:09:11,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199242446] [2021-03-10 22:09:11,221 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:09:11,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:11,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:09:11,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:09:11,221 INFO L87 Difference]: Start difference. First operand 154 states and 329 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:11,678 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2021-03-10 22:09:11,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:09:11,714 INFO L93 Difference]: Finished difference Result 177 states and 365 transitions. [2021-03-10 22:09:11,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:09:11,714 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:09:11,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:09:11,714 INFO L225 Difference]: With dead ends: 177 [2021-03-10 22:09:11,714 INFO L226 Difference]: Without dead ends: 161 [2021-03-10 22:09:11,715 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 791.8ms TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:09:11,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-03-10 22:09:11,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 155. [2021-03-10 22:09:11,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.1493506493506493) internal successors, (331), 154 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) [2021-03-10 22:09:11,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 331 transitions. [2021-03-10 22:09:11,716 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 331 transitions. Word has length 18 [2021-03-10 22:09:11,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:09:11,716 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 331 transitions. [2021-03-10 22:09:11,716 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:11,716 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 331 transitions. [2021-03-10 22:09:11,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:09:11,716 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:09:11,716 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:09:11,917 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16085,255 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:11,917 INFO L428 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:09:11,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:09:11,917 INFO L82 PathProgramCache]: Analyzing trace with hash 862618958, now seen corresponding path program 255 times [2021-03-10 22:09:11,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:09:11,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984213015] [2021-03-10 22:09:11,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:09:11,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:12,126 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:12,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984213015] [2021-03-10 22:09:12,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78758126] [2021-03-10 22:09:12,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:12,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 22:09:12,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:09:12,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 22:09:12,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:12,975 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:09:12,976 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:12,980 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:09:12,981 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:12,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:12,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:12,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-03-10 22:09:12,987 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:12,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:12,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:12,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:09:12,993 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:12,997 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:09:12,998 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:13,001 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:09:13,002 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:13,006 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:09:13,007 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:13,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:13,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:13,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:09:13,012 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:13,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:13,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:13,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-03-10 22:09:13,018 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:13,021 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:09:13,022 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:13,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:13,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:13,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:09:13,027 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:13,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:13,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:09:13,036 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:13,106 INFO L628 ElimStorePlain]: treesize reduction 17, result has 81.9 percent of original size [2021-03-10 22:09:13,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:09:13,110 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:13,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:09:13,114 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:13,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:09:13,117 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:13,145 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:13,146 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:09:13,146 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:479, output treesize:52 [2021-03-10 22:09:13,239 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:13,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:13,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-03-10 22:09:13,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562135566] [2021-03-10 22:09:13,239 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:09:13,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:13,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:09:13,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:09:13,239 INFO L87 Difference]: Start difference. First operand 155 states and 331 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:13,811 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 56 [2021-03-10 22:09:13,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:09:13,846 INFO L93 Difference]: Finished difference Result 175 states and 362 transitions. [2021-03-10 22:09:13,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:09:13,846 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:09:13,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:09:13,846 INFO L225 Difference]: With dead ends: 175 [2021-03-10 22:09:13,846 INFO L226 Difference]: Without dead ends: 162 [2021-03-10 22:09:13,847 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 935.2ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:09:13,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-03-10 22:09:13,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 155. [2021-03-10 22:09:13,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.1493506493506493) internal successors, (331), 154 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) [2021-03-10 22:09:13,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 331 transitions. [2021-03-10 22:09:13,848 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 331 transitions. Word has length 18 [2021-03-10 22:09:13,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:09:13,848 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 331 transitions. [2021-03-10 22:09:13,848 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:13,848 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 331 transitions. [2021-03-10 22:09:13,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:09:13,848 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:09:13,848 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:09:14,049 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16228,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:14,049 INFO L428 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:09:14,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:09:14,049 INFO L82 PathProgramCache]: Analyzing trace with hash 383334282, now seen corresponding path program 256 times [2021-03-10 22:09:14,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:09:14,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975643683] [2021-03-10 22:09:14,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:09:14,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:14,262 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:14,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975643683] [2021-03-10 22:09:14,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914996895] [2021-03-10 22:09:14,263 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:14,334 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:09:14,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:09:14,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:09:14,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:15,513 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:09:15,514 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:15,519 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:09:15,520 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:15,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:15,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:15,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-03-10 22:09:15,527 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:15,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:15,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:15,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:09:15,534 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:15,539 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:09:15,540 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:15,545 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:09:15,545 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:15,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:15,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:15,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:09:15,552 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:15,557 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:09:15,558 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:15,562 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:09:15,563 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:15,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:15,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:15,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:09:15,569 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:15,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:15,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:15,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:09:15,575 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:15,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:15,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:15,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:09:15,582 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:15,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:15,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:15,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-03-10 22:09:15,588 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:15,592 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:09:15,593 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:15,597 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:09:15,598 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:15,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:15,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:09:15,603 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:15,742 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 66 [2021-03-10 22:09:15,742 INFO L628 ElimStorePlain]: treesize reduction 18, result has 88.5 percent of original size [2021-03-10 22:09:15,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:09:15,747 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:15,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:09:15,752 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:15,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:09:15,756 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:15,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:09:15,760 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:15,819 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:15,820 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:09:15,820 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 5 variables, input treesize:777, output treesize:89 [2021-03-10 22:09:16,003 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:16,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:16,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-03-10 22:09:16,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644565262] [2021-03-10 22:09:16,003 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:09:16,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:16,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:09:16,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:09:16,004 INFO L87 Difference]: Start difference. First operand 155 states and 331 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:16,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:09:16,402 INFO L93 Difference]: Finished difference Result 201 states and 406 transitions. [2021-03-10 22:09:16,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:09:16,402 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:09:16,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:09:16,403 INFO L225 Difference]: With dead ends: 201 [2021-03-10 22:09:16,403 INFO L226 Difference]: Without dead ends: 182 [2021-03-10 22:09:16,403 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 683.7ms TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:09:16,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-03-10 22:09:16,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 154. [2021-03-10 22:09:16,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.150326797385621) internal successors, (329), 153 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) [2021-03-10 22:09:16,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 329 transitions. [2021-03-10 22:09:16,404 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 329 transitions. Word has length 18 [2021-03-10 22:09:16,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:09:16,404 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 329 transitions. [2021-03-10 22:09:16,404 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:16,404 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 329 transitions. [2021-03-10 22:09:16,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:09:16,405 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:09:16,405 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:09:16,612 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16369,257 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:16,612 INFO L428 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:09:16,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:09:16,612 INFO L82 PathProgramCache]: Analyzing trace with hash 1450364280, now seen corresponding path program 257 times [2021-03-10 22:09:16,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:09:16,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928835015] [2021-03-10 22:09:16,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:09:16,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:16,814 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:16,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928835015] [2021-03-10 22:09:16,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860161715] [2021-03-10 22:09:16,815 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 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 [2021-03-10 22:09:16,886 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 22:09:16,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:09:16,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:09:16,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:17,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:09:17,095 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:17,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:09:17,098 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:17,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:09:17,102 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:17,132 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:17,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:09:17,136 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:17,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:09:17,140 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:17,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:09:17,143 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:17,169 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:17,170 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:09:17,170 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:84, output treesize:48 [2021-03-10 22:09:17,258 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:17,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:17,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-03-10 22:09:17,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826439127] [2021-03-10 22:09:17,259 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:09:17,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:17,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:09:17,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:09:17,259 INFO L87 Difference]: Start difference. First operand 154 states and 329 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:17,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:09:17,603 INFO L93 Difference]: Finished difference Result 175 states and 362 transitions. [2021-03-10 22:09:17,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:09:17,604 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:09:17,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:09:17,604 INFO L225 Difference]: With dead ends: 175 [2021-03-10 22:09:17,604 INFO L226 Difference]: Without dead ends: 162 [2021-03-10 22:09:17,604 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 539.5ms TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:09:17,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-03-10 22:09:17,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 155. [2021-03-10 22:09:17,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.1493506493506493) internal successors, (331), 154 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) [2021-03-10 22:09:17,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 331 transitions. [2021-03-10 22:09:17,606 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 331 transitions. Word has length 18 [2021-03-10 22:09:17,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:09:17,606 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 331 transitions. [2021-03-10 22:09:17,606 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:17,606 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 331 transitions. [2021-03-10 22:09:17,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:09:17,606 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:09:17,606 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:09:17,812 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16484 [2021-03-10 22:09:17,812 INFO L428 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:09:17,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:09:17,812 INFO L82 PathProgramCache]: Analyzing trace with hash 971079604, now seen corresponding path program 258 times [2021-03-10 22:09:17,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:09:17,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487245774] [2021-03-10 22:09:17,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:09:17,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:18,008 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:18,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487245774] [2021-03-10 22:09:18,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823690471] [2021-03-10 22:09:18,008 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:18,079 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 22:09:18,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:09:18,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:09:18,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:18,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:09:18,282 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:18,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:09:18,286 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:18,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:09:18,290 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:18,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:09:18,294 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:18,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:09:18,299 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:18,369 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:18,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:09:18,373 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:18,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:09:18,377 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:18,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:09:18,381 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:18,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:09:18,385 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:18,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:09:18,389 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:18,448 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:18,450 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 22:09:18,450 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 3 variables, input treesize:172, output treesize:104 [2021-03-10 22:09:18,648 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:18,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:18,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-03-10 22:09:18,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085863156] [2021-03-10 22:09:18,649 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:09:18,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:18,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:09:18,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:09:18,649 INFO L87 Difference]: Start difference. First operand 155 states and 331 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:18,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:09:18,998 INFO L93 Difference]: Finished difference Result 201 states and 406 transitions. [2021-03-10 22:09:18,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:09:18,999 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:09:18,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:09:18,999 INFO L225 Difference]: With dead ends: 201 [2021-03-10 22:09:18,999 INFO L226 Difference]: Without dead ends: 182 [2021-03-10 22:09:18,999 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 633.2ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:09:18,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-03-10 22:09:19,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 155. [2021-03-10 22:09:19,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.1493506493506493) internal successors, (331), 154 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) [2021-03-10 22:09:19,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 331 transitions. [2021-03-10 22:09:19,000 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 331 transitions. Word has length 18 [2021-03-10 22:09:19,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:09:19,000 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 331 transitions. [2021-03-10 22:09:19,001 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:19,001 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 331 transitions. [2021-03-10 22:09:19,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:09:19,001 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:09:19,001 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:09:19,201 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16503,259 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:19,201 INFO L428 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:09:19,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:09:19,201 INFO L82 PathProgramCache]: Analyzing trace with hash 435849802, now seen corresponding path program 259 times [2021-03-10 22:09:19,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:09:19,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550988790] [2021-03-10 22:09:19,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:09:19,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:19,444 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:19,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550988790] [2021-03-10 22:09:19,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351372199] [2021-03-10 22:09:19,444 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:19,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:19,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:09:19,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:19,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:09:19,727 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:19,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:09:19,732 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:19,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:09:19,736 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:19,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:09:19,740 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:19,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:09:19,744 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:19,817 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:19,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:09:19,821 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:19,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:09:19,825 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:19,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:09:19,829 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:19,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:09:19,833 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:19,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:09:19,837 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:19,899 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:19,900 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 22:09:19,900 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 3 variables, input treesize:172, output treesize:104 [2021-03-10 22:09:20,104 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:20,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:20,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-03-10 22:09:20,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839299611] [2021-03-10 22:09:20,104 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:09:20,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:20,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:09:20,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:09:20,105 INFO L87 Difference]: Start difference. First operand 155 states and 331 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:20,476 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 36 [2021-03-10 22:09:20,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:09:20,563 INFO L93 Difference]: Finished difference Result 195 states and 403 transitions. [2021-03-10 22:09:20,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:09:20,564 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:09:20,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:09:20,564 INFO L225 Difference]: With dead ends: 195 [2021-03-10 22:09:20,564 INFO L226 Difference]: Without dead ends: 176 [2021-03-10 22:09:20,564 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 769.0ms TimeCoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:09:20,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-03-10 22:09:20,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 154. [2021-03-10 22:09:20,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.150326797385621) internal successors, (329), 153 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) [2021-03-10 22:09:20,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 329 transitions. [2021-03-10 22:09:20,566 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 329 transitions. Word has length 18 [2021-03-10 22:09:20,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:09:20,566 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 329 transitions. [2021-03-10 22:09:20,566 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:20,566 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 329 transitions. [2021-03-10 22:09:20,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:09:20,566 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:09:20,566 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:09:20,766 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16526,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:20,766 INFO L428 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:09:20,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:09:20,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1804367218, now seen corresponding path program 260 times [2021-03-10 22:09:20,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:09:20,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294786104] [2021-03-10 22:09:20,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:09:20,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:20,960 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:20,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294786104] [2021-03-10 22:09:20,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651703545] [2021-03-10 22:09:20,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:21,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:09:21,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:09:21,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:09:21,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:21,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:09:21,301 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:21,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:09:21,305 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:21,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:09:21,308 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:21,339 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:21,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:09:21,343 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:21,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:09:21,346 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:21,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:09:21,350 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:21,376 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:21,377 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:09:21,377 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:84, output treesize:48 [2021-03-10 22:09:21,470 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:21,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:21,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-03-10 22:09:21,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880771967] [2021-03-10 22:09:21,470 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:09:21,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:21,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:09:21,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:09:21,471 INFO L87 Difference]: Start difference. First operand 154 states and 329 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:21,756 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 31 [2021-03-10 22:09:21,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:09:21,853 INFO L93 Difference]: Finished difference Result 184 states and 384 transitions. [2021-03-10 22:09:21,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:09:21,853 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:09:21,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:09:21,854 INFO L225 Difference]: With dead ends: 184 [2021-03-10 22:09:21,854 INFO L226 Difference]: Without dead ends: 171 [2021-03-10 22:09:21,854 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 614.2ms TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:09:21,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-03-10 22:09:21,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 156. [2021-03-10 22:09:21,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.1483870967741936) internal successors, (333), 155 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:21,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 333 transitions. [2021-03-10 22:09:21,855 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 333 transitions. Word has length 18 [2021-03-10 22:09:21,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:09:21,855 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 333 transitions. [2021-03-10 22:09:21,855 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:21,855 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 333 transitions. [2021-03-10 22:09:21,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:09:21,856 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:09:21,856 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:09:22,063 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16553 [2021-03-10 22:09:22,063 INFO L428 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:09:22,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:09:22,063 INFO L82 PathProgramCache]: Analyzing trace with hash 2011315402, now seen corresponding path program 261 times [2021-03-10 22:09:22,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:09:22,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893451675] [2021-03-10 22:09:22,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:09:22,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:22,259 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:22,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893451675] [2021-03-10 22:09:22,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176515460] [2021-03-10 22:09:22,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:22,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 22:09:22,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:09:22,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:09:22,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:22,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:09:22,555 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:22,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:09:22,560 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:22,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:09:22,564 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:22,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:09:22,568 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:22,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:09:22,572 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:22,647 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:22,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:09:22,652 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:22,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:09:22,656 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:22,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:09:22,660 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:22,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:09:22,664 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:22,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:09:22,667 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:22,730 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:22,731 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 22:09:22,732 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 3 variables, input treesize:164, output treesize:96 [2021-03-10 22:09:22,939 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:22,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:22,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-03-10 22:09:22,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179678529] [2021-03-10 22:09:22,940 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:09:22,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:22,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:09:22,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:09:22,940 INFO L87 Difference]: Start difference. First operand 156 states and 333 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:23,449 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 36 [2021-03-10 22:09:23,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:09:23,479 INFO L93 Difference]: Finished difference Result 176 states and 365 transitions. [2021-03-10 22:09:23,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:09:23,480 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:09:23,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:09:23,480 INFO L225 Difference]: With dead ends: 176 [2021-03-10 22:09:23,480 INFO L226 Difference]: Without dead ends: 164 [2021-03-10 22:09:23,480 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 817.2ms TimeCoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:09:23,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-03-10 22:09:23,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 156. [2021-03-10 22:09:23,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.1483870967741936) internal successors, (333), 155 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:23,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 333 transitions. [2021-03-10 22:09:23,482 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 333 transitions. Word has length 18 [2021-03-10 22:09:23,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:09:23,482 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 333 transitions. [2021-03-10 22:09:23,482 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:23,482 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 333 transitions. [2021-03-10 22:09:23,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:09:23,482 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:09:23,482 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:09:23,682 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16581,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:23,682 INFO L428 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:09:23,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:09:23,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1476085600, now seen corresponding path program 262 times [2021-03-10 22:09:23,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:09:23,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003420984] [2021-03-10 22:09:23,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:09:23,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:23,919 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:23,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003420984] [2021-03-10 22:09:23,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242106029] [2021-03-10 22:09:23,919 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:23,990 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:09:23,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:09:23,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:09:23,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:24,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:09:24,214 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:24,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:09:24,218 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:24,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:09:24,223 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:24,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:09:24,227 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:24,284 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:24,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:09:24,289 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:24,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:09:24,292 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:24,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:09:24,296 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:24,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:09:24,300 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:24,350 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:24,351 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:09:24,351 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:131, output treesize:75 [2021-03-10 22:09:24,524 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:24,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:24,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-03-10 22:09:24,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285973200] [2021-03-10 22:09:24,525 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:09:24,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:24,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:09:24,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:09:24,525 INFO L87 Difference]: Start difference. First operand 156 states and 333 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:25,067 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 36 [2021-03-10 22:09:25,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:09:25,317 INFO L93 Difference]: Finished difference Result 234 states and 469 transitions. [2021-03-10 22:09:25,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:09:25,317 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:09:25,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:09:25,318 INFO L225 Difference]: With dead ends: 234 [2021-03-10 22:09:25,318 INFO L226 Difference]: Without dead ends: 208 [2021-03-10 22:09:25,318 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1012.8ms TimeCoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:09:25,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-03-10 22:09:25,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 155. [2021-03-10 22:09:25,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.1493506493506493) internal successors, (331), 154 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) [2021-03-10 22:09:25,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 331 transitions. [2021-03-10 22:09:25,319 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 331 transitions. Word has length 18 [2021-03-10 22:09:25,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:09:25,319 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 331 transitions. [2021-03-10 22:09:25,319 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:25,319 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 331 transitions. [2021-03-10 22:09:25,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:09:25,320 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:09:25,320 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:09:25,520 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16610 [2021-03-10 22:09:25,520 INFO L428 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:09:25,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:09:25,520 INFO L82 PathProgramCache]: Analyzing trace with hash 2063830922, now seen corresponding path program 263 times [2021-03-10 22:09:25,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:09:25,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503896967] [2021-03-10 22:09:25,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:09:25,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:25,924 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:25,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503896967] [2021-03-10 22:09:25,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390844256] [2021-03-10 22:09:25,924 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:25,996 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 22:09:25,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:09:25,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:09:25,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:26,669 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:09:26,670 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:26,675 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:09:26,676 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:26,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:26,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:26,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:09:26,683 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:26,688 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:09:26,689 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:26,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:26,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:26,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-03-10 22:09:26,696 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:26,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:26,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:26,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:09:26,703 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:26,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:26,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:26,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:09:26,709 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:26,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:26,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:26,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-03-10 22:09:26,716 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:26,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:26,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:26,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:09:26,723 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:26,728 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:09:26,728 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:26,745 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:09:26,746 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:26,751 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:09:26,752 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:26,757 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:09:26,758 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:26,762 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:09:26,763 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:26,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:26,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:26,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:09:26,769 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:26,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:26,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:09:26,775 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:26,920 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 66 [2021-03-10 22:09:26,921 INFO L628 ElimStorePlain]: treesize reduction 18, result has 88.5 percent of original size [2021-03-10 22:09:26,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:09:26,925 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:26,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:09:26,930 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:26,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:09:26,934 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:26,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:09:26,938 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:26,996 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:26,998 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:09:26,998 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 5 variables, input treesize:777, output treesize:89 [2021-03-10 22:09:27,180 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:27,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:27,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-03-10 22:09:27,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126887151] [2021-03-10 22:09:27,181 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:09:27,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:27,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:09:27,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:09:27,181 INFO L87 Difference]: Start difference. First operand 155 states and 331 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:27,695 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2021-03-10 22:09:27,997 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2021-03-10 22:09:28,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:09:28,009 INFO L93 Difference]: Finished difference Result 216 states and 441 transitions. [2021-03-10 22:09:28,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:09:28,010 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:09:28,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:09:28,010 INFO L225 Difference]: With dead ends: 216 [2021-03-10 22:09:28,010 INFO L226 Difference]: Without dead ends: 197 [2021-03-10 22:09:28,010 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1239.8ms TimeCoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:09:28,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-03-10 22:09:28,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 156. [2021-03-10 22:09:28,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.1548387096774193) internal successors, (334), 155 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:28,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 334 transitions. [2021-03-10 22:09:28,012 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 334 transitions. Word has length 18 [2021-03-10 22:09:28,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:09:28,012 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 334 transitions. [2021-03-10 22:09:28,012 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:28,012 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 334 transitions. [2021-03-10 22:09:28,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:09:28,012 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:09:28,012 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:09:28,212 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16644,264 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:28,212 INFO L428 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:09:28,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:09:28,213 INFO L82 PathProgramCache]: Analyzing trace with hash 378171448, now seen corresponding path program 264 times [2021-03-10 22:09:28,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:09:28,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527408875] [2021-03-10 22:09:28,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:09:28,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:28,405 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:28,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527408875] [2021-03-10 22:09:28,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339716251] [2021-03-10 22:09:28,405 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:28,478 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 22:09:28,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:09:28,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:09:28,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:28,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:09:28,754 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:28,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:09:28,758 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:28,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:09:28,761 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:28,793 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:28,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:09:28,796 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:28,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:09:28,800 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:28,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:09:28,803 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:28,830 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:28,831 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:09:28,831 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:92, output treesize:56 [2021-03-10 22:09:28,926 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:28,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:28,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-03-10 22:09:28,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962378980] [2021-03-10 22:09:28,926 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:09:28,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:28,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:09:28,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:09:28,926 INFO L87 Difference]: Start difference. First operand 156 states and 334 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:29,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:09:29,291 INFO L93 Difference]: Finished difference Result 176 states and 365 transitions. [2021-03-10 22:09:29,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:09:29,292 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:09:29,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:09:29,292 INFO L225 Difference]: With dead ends: 176 [2021-03-10 22:09:29,292 INFO L226 Difference]: Without dead ends: 163 [2021-03-10 22:09:29,292 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 623.8ms TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:09:29,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-03-10 22:09:29,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 156. [2021-03-10 22:09:29,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.1548387096774193) internal successors, (334), 155 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:29,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 334 transitions. [2021-03-10 22:09:29,294 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 334 transitions. Word has length 18 [2021-03-10 22:09:29,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:09:29,294 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 334 transitions. [2021-03-10 22:09:29,294 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:29,294 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 334 transitions. [2021-03-10 22:09:29,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:09:29,294 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:09:29,294 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:09:29,494 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16774 [2021-03-10 22:09:29,494 INFO L428 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:09:29,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:09:29,495 INFO L82 PathProgramCache]: Analyzing trace with hash -101113228, now seen corresponding path program 265 times [2021-03-10 22:09:29,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:09:29,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670819272] [2021-03-10 22:09:29,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:09:29,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:29,708 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:29,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670819272] [2021-03-10 22:09:29,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726449039] [2021-03-10 22:09:29,708 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:29,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:29,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:09:29,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:29,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:09:29,952 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:29,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:09:29,956 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:29,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:09:29,961 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:29,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:09:29,965 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:29,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:09:29,969 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:30,045 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:30,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:09:30,049 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:30,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:09:30,053 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:30,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:09:30,057 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:30,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:09:30,061 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:30,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:09:30,065 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:30,128 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:30,129 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 22:09:30,129 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 3 variables, input treesize:168, output treesize:100 [2021-03-10 22:09:30,341 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:30,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:30,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-03-10 22:09:30,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655920215] [2021-03-10 22:09:30,342 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:09:30,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:30,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:09:30,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:09:30,342 INFO L87 Difference]: Start difference. First operand 156 states and 334 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:30,912 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 36 [2021-03-10 22:09:30,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:09:30,944 INFO L93 Difference]: Finished difference Result 176 states and 366 transitions. [2021-03-10 22:09:30,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:09:30,945 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:09:30,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:09:30,945 INFO L225 Difference]: With dead ends: 176 [2021-03-10 22:09:30,945 INFO L226 Difference]: Without dead ends: 164 [2021-03-10 22:09:30,945 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 830.5ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:09:30,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-03-10 22:09:30,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 156. [2021-03-10 22:09:30,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.1548387096774193) internal successors, (334), 155 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:30,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 334 transitions. [2021-03-10 22:09:30,946 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 334 transitions. Word has length 18 [2021-03-10 22:09:30,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:09:30,946 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 334 transitions. [2021-03-10 22:09:30,946 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:30,946 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 334 transitions. [2021-03-10 22:09:30,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:09:30,947 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:09:30,947 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:09:31,147 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16802 [2021-03-10 22:09:31,147 INFO L428 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:09:31,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:09:31,147 INFO L82 PathProgramCache]: Analyzing trace with hash -636343030, now seen corresponding path program 266 times [2021-03-10 22:09:31,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:09:31,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840162952] [2021-03-10 22:09:31,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:09:31,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:31,357 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:31,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840162952] [2021-03-10 22:09:31,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345356798] [2021-03-10 22:09:31,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:31,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:09:31,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:09:31,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:09:31,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:31,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:09:31,633 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:31,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:09:31,637 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:31,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:09:31,642 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:31,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:09:31,646 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:31,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:09:31,650 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:31,724 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:31,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:09:31,728 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:31,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:09:31,732 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:31,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:09:31,737 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:31,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:09:31,741 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:31,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:09:31,745 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:31,808 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:31,810 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 22:09:31,810 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 3 variables, input treesize:168, output treesize:100 [2021-03-10 22:09:32,022 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:32,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:32,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-03-10 22:09:32,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719624309] [2021-03-10 22:09:32,022 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:09:32,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:32,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:09:32,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:09:32,023 INFO L87 Difference]: Start difference. First operand 156 states and 334 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:32,396 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 36 [2021-03-10 22:09:32,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:09:32,488 INFO L93 Difference]: Finished difference Result 189 states and 397 transitions. [2021-03-10 22:09:32,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:09:32,489 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:09:32,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:09:32,489 INFO L225 Difference]: With dead ends: 189 [2021-03-10 22:09:32,489 INFO L226 Difference]: Without dead ends: 177 [2021-03-10 22:09:32,489 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 719.6ms TimeCoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:09:32,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-03-10 22:09:32,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 155. [2021-03-10 22:09:32,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.155844155844156) internal successors, (332), 154 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:32,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 332 transitions. [2021-03-10 22:09:32,491 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 332 transitions. Word has length 18 [2021-03-10 22:09:32,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:09:32,491 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 332 transitions. [2021-03-10 22:09:32,491 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:32,491 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 332 transitions. [2021-03-10 22:09:32,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:09:32,491 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:09:32,491 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:09:32,691 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 267 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16830 [2021-03-10 22:09:32,692 INFO L428 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:09:32,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:09:32,692 INFO L82 PathProgramCache]: Analyzing trace with hash -48597708, now seen corresponding path program 267 times [2021-03-10 22:09:32,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:09:32,692 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633609464] [2021-03-10 22:09:32,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:09:32,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:32,951 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:32,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633609464] [2021-03-10 22:09:32,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594271704] [2021-03-10 22:09:32,952 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:33,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:09:33,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:09:33,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 34 conjunts are in the unsatisfiable core [2021-03-10 22:09:33,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:33,214 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2021-03-10 22:09:33,932 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:09:33,933 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:33,938 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:09:33,938 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:33,943 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:09:33,944 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:33,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:33,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:33,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:09:33,951 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:33,956 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:09:33,957 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:33,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:33,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:33,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:09:33,963 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:33,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:33,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:33,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:09:33,971 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:33,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:33,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:33,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-03-10 22:09:33,978 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:33,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:33,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:33,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:09:33,984 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:33,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:33,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:33,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-03-10 22:09:33,991 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:33,996 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:09:33,997 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:34,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:34,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:34,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:09:34,003 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:34,007 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:09:34,008 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:34,012 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:09:34,013 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:34,017 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:09:34,018 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:34,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:34,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:09:34,024 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:34,165 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 67 [2021-03-10 22:09:34,166 INFO L628 ElimStorePlain]: treesize reduction 24, result has 85.3 percent of original size [2021-03-10 22:09:34,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:09:34,170 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:34,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:09:34,175 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:34,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:09:34,180 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:34,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:09:34,184 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:34,242 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:34,244 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:09:34,244 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 5 variables, input treesize:801, output treesize:89 [2021-03-10 22:09:34,424 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:34,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:34,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-03-10 22:09:34,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172815437] [2021-03-10 22:09:34,424 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:09:34,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:34,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:09:34,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:09:34,424 INFO L87 Difference]: Start difference. First operand 155 states and 332 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:34,887 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2021-03-10 22:09:34,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:09:34,926 INFO L93 Difference]: Finished difference Result 182 states and 379 transitions. [2021-03-10 22:09:34,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:09:34,927 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:09:34,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:09:34,927 INFO L225 Difference]: With dead ends: 182 [2021-03-10 22:09:34,927 INFO L226 Difference]: Without dead ends: 170 [2021-03-10 22:09:34,927 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 827.3ms TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:09:34,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-03-10 22:09:34,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 155. [2021-03-10 22:09:34,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.155844155844156) internal successors, (332), 154 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:34,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 332 transitions. [2021-03-10 22:09:34,929 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 332 transitions. Word has length 18 [2021-03-10 22:09:34,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:09:34,929 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 332 transitions. [2021-03-10 22:09:34,929 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:34,929 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 332 transitions. [2021-03-10 22:09:34,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:09:34,929 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:09:34,929 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:09:35,143 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16856,268 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:35,143 INFO L428 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:09:35,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:09:35,144 INFO L82 PathProgramCache]: Analyzing trace with hash 991638090, now seen corresponding path program 268 times [2021-03-10 22:09:35,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:09:35,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170170406] [2021-03-10 22:09:35,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:09:35,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:35,372 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:35,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170170406] [2021-03-10 22:09:35,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548312285] [2021-03-10 22:09:35,373 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:35,445 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:09:35,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:09:35,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:09:35,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:36,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:36,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:36,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:09:36,320 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:36,325 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:09:36,325 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:36,330 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:09:36,331 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:36,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:36,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:09:36,337 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:36,513 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 65 [2021-03-10 22:09:36,513 INFO L628 ElimStorePlain]: treesize reduction 416, result has 22.0 percent of original size [2021-03-10 22:09:36,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:09:36,518 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:36,572 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:36,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:09:36,577 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:36,630 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:36,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:09:36,635 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:36,686 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:36,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:09:36,691 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:36,741 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:36,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:09:36,745 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:36,793 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:36,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:09:36,797 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:36,843 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:36,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:09:36,847 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:36,892 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:36,893 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:09:36,893 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 10 variables, input treesize:650, output treesize:73 [2021-03-10 22:09:37,064 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:37,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:37,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-03-10 22:09:37,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672515197] [2021-03-10 22:09:37,064 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:09:37,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:37,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:09:37,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:09:37,064 INFO L87 Difference]: Start difference. First operand 155 states and 332 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:37,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:09:37,528 INFO L93 Difference]: Finished difference Result 185 states and 385 transitions. [2021-03-10 22:09:37,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:09:37,528 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:09:37,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:09:37,528 INFO L225 Difference]: With dead ends: 185 [2021-03-10 22:09:37,529 INFO L226 Difference]: Without dead ends: 173 [2021-03-10 22:09:37,529 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 712.0ms TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:09:37,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-03-10 22:09:37,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 155. [2021-03-10 22:09:37,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.155844155844156) internal successors, (332), 154 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:37,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 332 transitions. [2021-03-10 22:09:37,530 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 332 transitions. Word has length 18 [2021-03-10 22:09:37,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:09:37,530 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 332 transitions. [2021-03-10 22:09:37,530 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:37,530 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 332 transitions. [2021-03-10 22:09:37,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:09:37,530 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:09:37,530 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:09:37,731 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17044 [2021-03-10 22:09:37,731 INFO L428 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:09:37,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:09:37,731 INFO L82 PathProgramCache]: Analyzing trace with hash -1106917878, now seen corresponding path program 269 times [2021-03-10 22:09:37,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:09:37,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288080558] [2021-03-10 22:09:37,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:09:37,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:37,943 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:37,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288080558] [2021-03-10 22:09:37,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116114063] [2021-03-10 22:09:37,943 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:38,016 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 22:09:38,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:09:38,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:09:38,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:38,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:09:38,271 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:38,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:09:38,275 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:38,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:09:38,279 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:38,310 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:38,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:09:38,314 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:38,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:09:38,318 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:38,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:09:38,321 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:38,348 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:38,349 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:09:38,349 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:88, output treesize:52 [2021-03-10 22:09:38,445 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:38,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:38,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-03-10 22:09:38,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146398872] [2021-03-10 22:09:38,445 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:09:38,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:38,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:09:38,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:09:38,445 INFO L87 Difference]: Start difference. First operand 155 states and 332 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:38,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:09:38,851 INFO L93 Difference]: Finished difference Result 183 states and 379 transitions. [2021-03-10 22:09:38,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:09:38,852 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:09:38,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:09:38,852 INFO L225 Difference]: With dead ends: 183 [2021-03-10 22:09:38,852 INFO L226 Difference]: Without dead ends: 170 [2021-03-10 22:09:38,852 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 662.4ms TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:09:38,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-03-10 22:09:38,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 156. [2021-03-10 22:09:38,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.1548387096774193) internal successors, (334), 155 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:38,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 334 transitions. [2021-03-10 22:09:38,853 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 334 transitions. Word has length 18 [2021-03-10 22:09:38,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:09:38,854 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 334 transitions. [2021-03-10 22:09:38,854 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:38,854 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 334 transitions. [2021-03-10 22:09:38,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:09:38,854 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:09:38,854 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:09:39,054 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17261,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:39,054 INFO L428 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:09:39,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:09:39,054 INFO L82 PathProgramCache]: Analyzing trace with hash -1586202554, now seen corresponding path program 270 times [2021-03-10 22:09:39,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:09:39,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756256063] [2021-03-10 22:09:39,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:09:39,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:39,247 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:39,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756256063] [2021-03-10 22:09:39,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149647622] [2021-03-10 22:09:39,247 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:39,320 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 22:09:39,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:09:39,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:09:39,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:39,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:09:39,522 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:39,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:09:39,526 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:39,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:09:39,531 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:39,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:09:39,536 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:39,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:09:39,540 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:39,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:09:39,545 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:39,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:09:39,549 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:39,723 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2021-03-10 22:09:39,723 INFO L628 ElimStorePlain]: treesize reduction 30, result has 85.1 percent of original size [2021-03-10 22:09:39,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:09:39,728 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:39,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:09:39,732 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:39,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:09:39,736 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:39,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:09:39,741 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:39,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:09:39,745 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:39,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:09:39,749 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:39,824 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:39,826 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-03-10 22:09:39,826 INFO L247 ElimStorePlain]: Needed 14 recursive calls to eliminate 3 variables, input treesize:237, output treesize:121 [2021-03-10 22:09:40,051 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:40,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:40,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-03-10 22:09:40,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424413645] [2021-03-10 22:09:40,051 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:09:40,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:40,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:09:40,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:09:40,052 INFO L87 Difference]: Start difference. First operand 156 states and 334 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:40,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:09:40,476 INFO L93 Difference]: Finished difference Result 198 states and 406 transitions. [2021-03-10 22:09:40,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:09:40,476 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:09:40,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:09:40,476 INFO L225 Difference]: With dead ends: 198 [2021-03-10 22:09:40,477 INFO L226 Difference]: Without dead ends: 186 [2021-03-10 22:09:40,477 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 666.5ms TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:09:40,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-03-10 22:09:40,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 156. [2021-03-10 22:09:40,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.1548387096774193) internal successors, (334), 155 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:40,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 334 transitions. [2021-03-10 22:09:40,478 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 334 transitions. Word has length 18 [2021-03-10 22:09:40,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:09:40,478 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 334 transitions. [2021-03-10 22:09:40,478 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:40,478 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 334 transitions. [2021-03-10 22:09:40,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:09:40,478 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:09:40,479 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:09:40,679 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17292,271 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:40,679 INFO L428 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:09:40,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:09:40,679 INFO L82 PathProgramCache]: Analyzing trace with hash -2121432356, now seen corresponding path program 271 times [2021-03-10 22:09:40,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:09:40,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262198155] [2021-03-10 22:09:40,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:09:40,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:40,874 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:40,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262198155] [2021-03-10 22:09:40,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280864958] [2021-03-10 22:09:40,875 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:40,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:40,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:09:40,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:41,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:09:41,126 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:41,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:09:41,130 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:41,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:09:41,135 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:41,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:09:41,139 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:41,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:09:41,143 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:41,219 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:41,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:09:41,223 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:41,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:09:41,227 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:41,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:09:41,231 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:41,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:09:41,235 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:41,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:09:41,239 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:41,302 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:41,304 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 22:09:41,304 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 3 variables, input treesize:168, output treesize:100 [2021-03-10 22:09:41,519 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:41,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:41,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-03-10 22:09:41,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764218747] [2021-03-10 22:09:41,519 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:09:41,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:41,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:09:41,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:09:41,520 INFO L87 Difference]: Start difference. First operand 156 states and 334 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:41,642 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-03-10 22:09:42,076 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 36 [2021-03-10 22:09:42,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:09:42,298 INFO L93 Difference]: Finished difference Result 241 states and 484 transitions. [2021-03-10 22:09:42,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:09:42,298 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:09:42,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:09:42,298 INFO L225 Difference]: With dead ends: 241 [2021-03-10 22:09:42,298 INFO L226 Difference]: Without dead ends: 215 [2021-03-10 22:09:42,299 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 986.3ms TimeCoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:09:42,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-03-10 22:09:42,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 157. [2021-03-10 22:09:42,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.1666666666666665) internal successors, (338), 156 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:42,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 338 transitions. [2021-03-10 22:09:42,300 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 338 transitions. Word has length 18 [2021-03-10 22:09:42,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:09:42,300 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 338 transitions. [2021-03-10 22:09:42,300 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:42,300 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 338 transitions. [2021-03-10 22:09:42,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:09:42,301 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:09:42,301 INFO L519 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:09:42,501 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17335,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:42,501 INFO L428 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:09:42,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:09:42,501 INFO L82 PathProgramCache]: Analyzing trace with hash -2089485403, now seen corresponding path program 272 times [2021-03-10 22:09:42,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:09:42,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334054530] [2021-03-10 22:09:42,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:09:42,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:42,572 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:09:42,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334054530] [2021-03-10 22:09:42,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733889176] [2021-03-10 22:09:42,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 22:09:42,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:09:42,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:09:42,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 22:09:42,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:42,754 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:09:42,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:42,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 22:09:42,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512943695] [2021-03-10 22:09:42,755 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:09:42,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:42,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:09:42,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:09:42,755 INFO L87 Difference]: Start difference. First operand 157 states and 338 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:42,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:09:42,916 INFO L93 Difference]: Finished difference Result 182 states and 383 transitions. [2021-03-10 22:09:42,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:09:42,917 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:09:42,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:09:42,917 INFO L225 Difference]: With dead ends: 182 [2021-03-10 22:09:42,917 INFO L226 Difference]: Without dead ends: 182 [2021-03-10 22:09:42,917 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 183.0ms TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:09:42,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-03-10 22:09:42,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 155. [2021-03-10 22:09:42,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.155844155844156) internal successors, (332), 154 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:42,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 332 transitions. [2021-03-10 22:09:42,918 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 332 transitions. Word has length 18 [2021-03-10 22:09:42,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:09:42,918 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 332 transitions. [2021-03-10 22:09:42,918 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:42,918 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 332 transitions. [2021-03-10 22:09:42,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:09:42,919 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:09:42,919 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:09:43,119 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17356 [2021-03-10 22:09:43,119 INFO L428 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:09:43,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:09:43,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1533687034, now seen corresponding path program 273 times [2021-03-10 22:09:43,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:09:43,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329729442] [2021-03-10 22:09:43,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:09:43,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:43,351 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:43,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329729442] [2021-03-10 22:09:43,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718731726] [2021-03-10 22:09:43,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:43,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:09:43,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:09:43,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:09:43,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:43,608 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2021-03-10 22:09:44,441 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:09:44,442 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:44,448 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:09:44,449 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:44,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:44,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:44,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:09:44,457 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:44,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:44,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:44,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:09:44,464 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:44,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:44,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:44,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-03-10 22:09:44,471 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:44,476 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:09:44,485 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:44,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:44,491 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:44,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:09:44,492 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:44,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:44,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:44,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:09:44,501 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:44,506 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:09:44,507 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:44,511 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:09:44,512 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:44,517 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:09:44,517 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:44,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:44,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:44,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:09:44,524 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:44,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:44,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:44,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-03-10 22:09:44,531 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:44,535 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:09:44,536 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:44,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:44,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:44,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:09:44,542 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:44,545 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:09:44,546 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:44,683 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 67 [2021-03-10 22:09:44,684 INFO L628 ElimStorePlain]: treesize reduction 18, result has 88.5 percent of original size [2021-03-10 22:09:44,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:09:44,688 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:44,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:09:44,693 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:44,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:09:44,697 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:44,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:09:44,702 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:44,764 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:44,766 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:09:44,766 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 5 variables, input treesize:777, output treesize:89 [2021-03-10 22:09:44,985 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:44,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:44,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-03-10 22:09:44,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092028249] [2021-03-10 22:09:44,986 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:09:44,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:44,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:09:44,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:09:44,986 INFO L87 Difference]: Start difference. First operand 155 states and 332 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:45,130 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 46 [2021-03-10 22:09:45,325 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2021-03-10 22:09:45,654 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 47 [2021-03-10 22:09:45,800 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2021-03-10 22:09:45,941 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2021-03-10 22:09:46,095 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 51 [2021-03-10 22:09:46,231 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 47 [2021-03-10 22:09:46,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:09:46,339 INFO L93 Difference]: Finished difference Result 266 states and 529 transitions. [2021-03-10 22:09:46,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 22:09:46,339 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:09:46,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:09:46,340 INFO L225 Difference]: With dead ends: 266 [2021-03-10 22:09:46,340 INFO L226 Difference]: Without dead ends: 233 [2021-03-10 22:09:46,340 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 1618.4ms TimeCoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:09:46,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-03-10 22:09:46,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 155. [2021-03-10 22:09:46,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.155844155844156) internal successors, (332), 154 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:46,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 332 transitions. [2021-03-10 22:09:46,342 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 332 transitions. Word has length 18 [2021-03-10 22:09:46,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:09:46,342 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 332 transitions. [2021-03-10 22:09:46,342 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:46,342 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 332 transitions. [2021-03-10 22:09:46,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:09:46,342 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:09:46,342 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:09:46,555 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17364,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:46,555 INFO L428 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:09:46,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:09:46,555 INFO L82 PathProgramCache]: Analyzing trace with hash -493451236, now seen corresponding path program 274 times [2021-03-10 22:09:46,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:09:46,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713824455] [2021-03-10 22:09:46,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:09:46,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:46,792 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:46,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713824455] [2021-03-10 22:09:46,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10064780] [2021-03-10 22:09:46,792 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:46,865 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:09:46,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:09:46,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:09:46,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:47,567 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:09:47,568 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:47,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:47,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:47,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:09:47,574 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:47,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:47,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:47,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:09:47,581 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:47,585 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:09:47,586 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:47,769 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 68 [2021-03-10 22:09:47,769 INFO L628 ElimStorePlain]: treesize reduction 376, result has 23.9 percent of original size [2021-03-10 22:09:47,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:09:47,774 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:47,832 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:47,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:09:47,836 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:47,892 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:47,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:09:47,897 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:47,951 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:47,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:09:47,956 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:48,008 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:48,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:09:48,012 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:48,063 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:48,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:09:48,067 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:48,115 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:48,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:09:48,119 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:48,166 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:48,168 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:09:48,168 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 10 variables, input treesize:609, output treesize:73 [2021-03-10 22:09:48,352 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:48,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:48,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-03-10 22:09:48,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265702312] [2021-03-10 22:09:48,353 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:09:48,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:48,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:09:48,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:09:48,353 INFO L87 Difference]: Start difference. First operand 155 states and 332 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:48,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:09:48,947 INFO L93 Difference]: Finished difference Result 189 states and 393 transitions. [2021-03-10 22:09:48,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:09:48,948 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:09:48,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:09:48,948 INFO L225 Difference]: With dead ends: 189 [2021-03-10 22:09:48,948 INFO L226 Difference]: Without dead ends: 177 [2021-03-10 22:09:48,948 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 785.0ms TimeCoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:09:48,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-03-10 22:09:48,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 155. [2021-03-10 22:09:48,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.155844155844156) internal successors, (332), 154 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:48,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 332 transitions. [2021-03-10 22:09:48,950 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 332 transitions. Word has length 18 [2021-03-10 22:09:48,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:09:48,950 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 332 transitions. [2021-03-10 22:09:48,950 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:48,950 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 332 transitions. [2021-03-10 22:09:48,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 22:09:48,950 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:09:48,950 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:09:49,150 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17623,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:49,150 INFO L428 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:09:49,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:09:49,151 INFO L82 PathProgramCache]: Analyzing trace with hash 844115978, now seen corresponding path program 275 times [2021-03-10 22:09:49,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:09:49,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926392983] [2021-03-10 22:09:49,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:09:49,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:49,409 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:49,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926392983] [2021-03-10 22:09:49,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105815137] [2021-03-10 22:09:49,409 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:49,482 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 22:09:49,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:09:49,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-03-10 22:09:49,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:50,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:50,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:50,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-03-10 22:09:50,421 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:50,426 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:09:50,426 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:50,431 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:09:50,432 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:50,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:50,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:09:50,437 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:50,611 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 68 [2021-03-10 22:09:50,612 INFO L628 ElimStorePlain]: treesize reduction 369, result has 24.5 percent of original size [2021-03-10 22:09:50,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:09:50,617 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:50,672 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:50,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:09:50,677 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:50,731 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:50,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:09:50,735 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:50,787 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:50,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:09:50,791 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:50,841 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:50,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:09:50,845 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:50,894 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:50,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:09:50,898 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:50,944 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:50,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:09:50,948 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:50,993 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:50,994 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:09:50,994 INFO L247 ElimStorePlain]: Needed 12 recursive calls to eliminate 10 variables, input treesize:609, output treesize:73 [2021-03-10 22:09:51,161 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:51,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:51,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-03-10 22:09:51,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821176591] [2021-03-10 22:09:51,162 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:09:51,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:51,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:09:51,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:09:51,162 INFO L87 Difference]: Start difference. First operand 155 states and 332 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:52,080 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 67 [2021-03-10 22:09:52,237 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 64 [2021-03-10 22:09:52,384 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 60 [2021-03-10 22:09:52,536 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2021-03-10 22:09:52,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:09:52,576 INFO L93 Difference]: Finished difference Result 227 states and 470 transitions. [2021-03-10 22:09:52,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:09:52,577 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 22:09:52,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:09:52,577 INFO L225 Difference]: With dead ends: 227 [2021-03-10 22:09:52,577 INFO L226 Difference]: Without dead ends: 215 [2021-03-10 22:09:52,577 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 1700.2ms TimeCoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2021-03-10 22:09:52,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-03-10 22:09:52,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 158. [2021-03-10 22:09:52,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.1528662420382165) internal successors, (338), 157 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:52,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 338 transitions. [2021-03-10 22:09:52,579 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 338 transitions. Word has length 18 [2021-03-10 22:09:52,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:09:52,579 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 338 transitions. [2021-03-10 22:09:52,579 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:52,579 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 338 transitions. [2021-03-10 22:09:52,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:09:52,579 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:09:52,579 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:09:52,779 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17741 [2021-03-10 22:09:52,779 INFO L428 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:09:52,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:09:52,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1552318047, now seen corresponding path program 276 times [2021-03-10 22:09:52,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:09:52,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144791899] [2021-03-10 22:09:52,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:09:52,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:52,877 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:52,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144791899] [2021-03-10 22:09:52,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454341153] [2021-03-10 22:09:52,877 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:52,952 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:09:52,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:09:52,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:09:52,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:53,051 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:53,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:53,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-03-10 22:09:53,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173800172] [2021-03-10 22:09:53,052 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:09:53,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:53,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:09:53,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:09:53,052 INFO L87 Difference]: Start difference. First operand 158 states and 338 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:53,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:09:53,266 INFO L93 Difference]: Finished difference Result 205 states and 425 transitions. [2021-03-10 22:09:53,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:09:53,266 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:09:53,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:09:53,266 INFO L225 Difference]: With dead ends: 205 [2021-03-10 22:09:53,266 INFO L226 Difference]: Without dead ends: 205 [2021-03-10 22:09:53,266 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 197.6ms TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:09:53,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-03-10 22:09:53,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 162. [2021-03-10 22:09:53,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 2.1490683229813663) internal successors, (346), 161 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:53,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 346 transitions. [2021-03-10 22:09:53,268 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 346 transitions. Word has length 19 [2021-03-10 22:09:53,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:09:53,268 INFO L480 AbstractCegarLoop]: Abstraction has 162 states and 346 transitions. [2021-03-10 22:09:53,268 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:53,268 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 346 transitions. [2021-03-10 22:09:53,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:09:53,268 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:09:53,268 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:09:53,469 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 277 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17851 [2021-03-10 22:09:53,469 INFO L428 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:09:53,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:09:53,469 INFO L82 PathProgramCache]: Analyzing trace with hash 112722865, now seen corresponding path program 277 times [2021-03-10 22:09:53,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:09:53,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130030010] [2021-03-10 22:09:53,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:09:53,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:53,561 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:53,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130030010] [2021-03-10 22:09:53,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659456724] [2021-03-10 22:09:53,561 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:53,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:53,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:09:53,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:53,745 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:53,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:53,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-03-10 22:09:53,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054511672] [2021-03-10 22:09:53,745 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:09:53,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:53,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:09:53,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:09:53,746 INFO L87 Difference]: Start difference. First operand 162 states and 346 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:53,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:09:53,962 INFO L93 Difference]: Finished difference Result 204 states and 427 transitions. [2021-03-10 22:09:53,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:09:53,962 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:09:53,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:09:53,963 INFO L225 Difference]: With dead ends: 204 [2021-03-10 22:09:53,963 INFO L226 Difference]: Without dead ends: 204 [2021-03-10 22:09:53,963 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 219.9ms TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:09:53,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-03-10 22:09:53,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 162. [2021-03-10 22:09:53,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 2.1490683229813663) internal successors, (346), 161 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:53,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 346 transitions. [2021-03-10 22:09:53,964 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 346 transitions. Word has length 19 [2021-03-10 22:09:53,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:09:53,964 INFO L480 AbstractCegarLoop]: Abstraction has 162 states and 346 transitions. [2021-03-10 22:09:53,964 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:53,965 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 346 transitions. [2021-03-10 22:09:53,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:09:53,965 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:09:53,965 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:09:54,165 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17855,278 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:54,165 INFO L428 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:09:54,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:09:54,165 INFO L82 PathProgramCache]: Analyzing trace with hash 121885699, now seen corresponding path program 278 times [2021-03-10 22:09:54,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:09:54,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794991558] [2021-03-10 22:09:54,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:09:54,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:54,260 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:54,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794991558] [2021-03-10 22:09:54,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159293214] [2021-03-10 22:09:54,260 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 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 [2021-03-10 22:09:54,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:09:54,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:09:54,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:09:54,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:54,465 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:54,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:54,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-10 22:09:54,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241318927] [2021-03-10 22:09:54,465 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:09:54,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:54,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:09:54,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:09:54,465 INFO L87 Difference]: Start difference. First operand 162 states and 346 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:54,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:09:54,700 INFO L93 Difference]: Finished difference Result 196 states and 411 transitions. [2021-03-10 22:09:54,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:09:54,701 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:09:54,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:09:54,701 INFO L225 Difference]: With dead ends: 196 [2021-03-10 22:09:54,701 INFO L226 Difference]: Without dead ends: 196 [2021-03-10 22:09:54,701 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 228.5ms TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:09:54,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-03-10 22:09:54,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 162. [2021-03-10 22:09:54,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 2.1490683229813663) internal successors, (346), 161 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:54,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 346 transitions. [2021-03-10 22:09:54,703 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 346 transitions. Word has length 19 [2021-03-10 22:09:54,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:09:54,703 INFO L480 AbstractCegarLoop]: Abstraction has 162 states and 346 transitions. [2021-03-10 22:09:54,703 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:54,703 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 346 transitions. [2021-03-10 22:09:54,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:09:54,703 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:09:54,703 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:09:54,903 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17859,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:54,903 INFO L428 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:09:54,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:09:54,903 INFO L82 PathProgramCache]: Analyzing trace with hash 758136460, now seen corresponding path program 279 times [2021-03-10 22:09:54,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:09:54,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230248474] [2021-03-10 22:09:54,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:09:54,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:55,015 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:55,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230248474] [2021-03-10 22:09:55,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643881724] [2021-03-10 22:09:55,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:55,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:09:55,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:09:55,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:09:55,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:55,496 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:55,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:55,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-10 22:09:55,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388631931] [2021-03-10 22:09:55,497 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:09:55,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:55,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:09:55,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:09:55,497 INFO L87 Difference]: Start difference. First operand 162 states and 346 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:55,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:09:55,935 INFO L93 Difference]: Finished difference Result 205 states and 420 transitions. [2021-03-10 22:09:55,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:09:55,936 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:09:55,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:09:55,936 INFO L225 Difference]: With dead ends: 205 [2021-03-10 22:09:55,936 INFO L226 Difference]: Without dead ends: 196 [2021-03-10 22:09:55,936 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 619.8ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:09:55,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-03-10 22:09:55,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 162. [2021-03-10 22:09:55,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 2.142857142857143) internal successors, (345), 161 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:55,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 345 transitions. [2021-03-10 22:09:55,938 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 345 transitions. Word has length 19 [2021-03-10 22:09:55,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:09:55,938 INFO L480 AbstractCegarLoop]: Abstraction has 162 states and 345 transitions. [2021-03-10 22:09:55,938 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:55,938 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 345 transitions. [2021-03-10 22:09:55,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:09:55,938 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:09:55,938 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:09:56,138 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 280 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17863 [2021-03-10 22:09:56,138 INFO L428 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:09:56,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:09:56,139 INFO L82 PathProgramCache]: Analyzing trace with hash -1263292047, now seen corresponding path program 280 times [2021-03-10 22:09:56,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:09:56,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920480600] [2021-03-10 22:09:56,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:09:56,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:56,235 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:56,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920480600] [2021-03-10 22:09:56,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345637221] [2021-03-10 22:09:56,235 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 22:09:56,309 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:09:56,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:09:56,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:09:56,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:56,412 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:56,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:56,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-03-10 22:09:56,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206196339] [2021-03-10 22:09:56,413 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:09:56,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:56,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:09:56,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:09:56,413 INFO L87 Difference]: Start difference. First operand 162 states and 345 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:56,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:09:56,644 INFO L93 Difference]: Finished difference Result 192 states and 402 transitions. [2021-03-10 22:09:56,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:09:56,644 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:09:56,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:09:56,644 INFO L225 Difference]: With dead ends: 192 [2021-03-10 22:09:56,644 INFO L226 Difference]: Without dead ends: 192 [2021-03-10 22:09:56,645 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 201.1ms TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:09:56,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-03-10 22:09:56,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 162. [2021-03-10 22:09:56,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 2.142857142857143) internal successors, (345), 161 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:56,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 345 transitions. [2021-03-10 22:09:56,646 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 345 transitions. Word has length 19 [2021-03-10 22:09:56,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:09:56,646 INFO L480 AbstractCegarLoop]: Abstraction has 162 states and 345 transitions. [2021-03-10 22:09:56,646 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:56,646 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 345 transitions. [2021-03-10 22:09:56,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:09:56,646 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:09:56,646 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:09:56,847 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 281 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17883 [2021-03-10 22:09:56,847 INFO L428 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:09:56,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:09:56,847 INFO L82 PathProgramCache]: Analyzing trace with hash -272936504, now seen corresponding path program 281 times [2021-03-10 22:09:56,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:09:56,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353242038] [2021-03-10 22:09:56,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:09:56,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:56,941 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:56,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353242038] [2021-03-10 22:09:56,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488903410] [2021-03-10 22:09:56,941 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:57,015 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:09:57,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:09:57,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:09:57,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:57,458 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:57,458 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:57,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-10 22:09:57,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033379567] [2021-03-10 22:09:57,458 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:09:57,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:57,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:09:57,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:09:57,458 INFO L87 Difference]: Start difference. First operand 162 states and 345 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:57,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:09:57,908 INFO L93 Difference]: Finished difference Result 208 states and 426 transitions. [2021-03-10 22:09:57,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:09:57,908 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:09:57,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:09:57,909 INFO L225 Difference]: With dead ends: 208 [2021-03-10 22:09:57,909 INFO L226 Difference]: Without dead ends: 202 [2021-03-10 22:09:57,909 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 599.9ms TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:09:57,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-03-10 22:09:57,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 162. [2021-03-10 22:09:57,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 2.1366459627329193) internal successors, (344), 161 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:57,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 344 transitions. [2021-03-10 22:09:57,910 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 344 transitions. Word has length 19 [2021-03-10 22:09:57,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:09:57,910 INFO L480 AbstractCegarLoop]: Abstraction has 162 states and 344 transitions. [2021-03-10 22:09:57,910 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:57,910 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 344 transitions. [2021-03-10 22:09:57,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:09:57,910 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:09:57,911 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:09:58,111 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17887,282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:58,111 INFO L428 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:09:58,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:09:58,111 INFO L82 PathProgramCache]: Analyzing trace with hash 2017160771, now seen corresponding path program 282 times [2021-03-10 22:09:58,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:09:58,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525842929] [2021-03-10 22:09:58,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:09:58,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:58,213 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:58,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525842929] [2021-03-10 22:09:58,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455681876] [2021-03-10 22:09:58,213 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:58,289 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 22:09:58,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:09:58,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:09:58,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:58,401 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:58,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:58,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-03-10 22:09:58,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19674091] [2021-03-10 22:09:58,401 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:09:58,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:58,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:09:58,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:09:58,401 INFO L87 Difference]: Start difference. First operand 162 states and 344 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:58,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:09:58,745 INFO L93 Difference]: Finished difference Result 202 states and 415 transitions. [2021-03-10 22:09:58,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:09:58,746 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:09:58,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:09:58,746 INFO L225 Difference]: With dead ends: 202 [2021-03-10 22:09:58,746 INFO L226 Difference]: Without dead ends: 202 [2021-03-10 22:09:58,747 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 326.0ms TimeCoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:09:58,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-03-10 22:09:58,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 163. [2021-03-10 22:09:58,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 2.1481481481481484) internal successors, (348), 162 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:58,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 348 transitions. [2021-03-10 22:09:58,748 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 348 transitions. Word has length 19 [2021-03-10 22:09:58,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:09:58,748 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 348 transitions. [2021-03-10 22:09:58,748 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:09:58,748 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 348 transitions. [2021-03-10 22:09:58,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:09:58,748 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:09:58,748 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:09:58,949 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17908 [2021-03-10 22:09:58,949 INFO L428 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:09:58,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:09:58,949 INFO L82 PathProgramCache]: Analyzing trace with hash 2049107724, now seen corresponding path program 283 times [2021-03-10 22:09:58,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:09:58,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047525289] [2021-03-10 22:09:58,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:09:58,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:59,046 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:59,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047525289] [2021-03-10 22:09:59,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343074637] [2021-03-10 22:09:59,046 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:09:59,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:09:59,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:09:59,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:09:59,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:59,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:09:59,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:09:59,457 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:59,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:09:59,461 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:59,536 INFO L628 ElimStorePlain]: treesize reduction 51, result has 53.2 percent of original size [2021-03-10 22:09:59,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:09:59,541 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:59,568 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:59,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:09:59,573 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:59,599 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:59,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:09:59,603 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:59,633 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:59,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:09:59,636 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:09:59,660 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:09:59,661 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 5 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:09:59,661 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:140, output treesize:13 [2021-03-10 22:09:59,704 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:09:59,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:09:59,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-10 22:09:59,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797113936] [2021-03-10 22:09:59,704 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:09:59,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:09:59,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:09:59,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:09:59,705 INFO L87 Difference]: Start difference. First operand 163 states and 348 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:00,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:00,497 INFO L93 Difference]: Finished difference Result 219 states and 442 transitions. [2021-03-10 22:10:00,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 22:10:00,498 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:10:00,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:00,498 INFO L225 Difference]: With dead ends: 219 [2021-03-10 22:10:00,498 INFO L226 Difference]: Without dead ends: 216 [2021-03-10 22:10:00,498 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 853.0ms TimeCoverageRelationStatistics Valid=128, Invalid=628, Unknown=0, NotChecked=0, Total=756 [2021-03-10 22:10:00,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-03-10 22:10:00,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 167. [2021-03-10 22:10:00,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.144578313253012) internal successors, (356), 166 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:00,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 356 transitions. [2021-03-10 22:10:00,500 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 356 transitions. Word has length 19 [2021-03-10 22:10:00,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:00,500 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 356 transitions. [2021-03-10 22:10:00,500 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:00,500 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 356 transitions. [2021-03-10 22:10:00,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:10:00,500 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:00,500 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:00,700 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17916,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:00,701 INFO L428 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:00,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:00,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1569823048, now seen corresponding path program 284 times [2021-03-10 22:10:00,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:00,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573299715] [2021-03-10 22:10:00,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:00,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:00,819 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:00,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573299715] [2021-03-10 22:10:00,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573517111] [2021-03-10 22:10:00,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:00,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:10:00,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:00,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:10:00,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:01,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:10:01,264 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:01,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:10:01,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:10:01,268 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:01,346 INFO L628 ElimStorePlain]: treesize reduction 51, result has 51.4 percent of original size [2021-03-10 22:10:01,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:10:01,350 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:01,377 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:10:01,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:10:01,381 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:01,406 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:10:01,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:10:01,409 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:01,433 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:10:01,434 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:10:01,434 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 7 variables, input treesize:128, output treesize:13 [2021-03-10 22:10:01,474 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:01,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:01,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-10 22:10:01,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559626082] [2021-03-10 22:10:01,475 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:10:01,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:01,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:10:01,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:10:01,475 INFO L87 Difference]: Start difference. First operand 167 states and 356 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:01,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:01,858 INFO L93 Difference]: Finished difference Result 202 states and 418 transitions. [2021-03-10 22:10:01,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:10:01,859 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:10:01,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:01,859 INFO L225 Difference]: With dead ends: 202 [2021-03-10 22:10:01,859 INFO L226 Difference]: Without dead ends: 202 [2021-03-10 22:10:01,860 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 499.6ms TimeCoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:10:01,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-03-10 22:10:01,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 163. [2021-03-10 22:10:01,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 2.1419753086419755) internal successors, (347), 162 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:01,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 347 transitions. [2021-03-10 22:10:01,861 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 347 transitions. Word has length 19 [2021-03-10 22:10:01,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:01,861 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 347 transitions. [2021-03-10 22:10:01,861 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:01,861 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 347 transitions. [2021-03-10 22:10:01,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:10:01,861 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:01,862 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:02,062 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17939 [2021-03-10 22:10:02,062 INFO L428 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:02,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:02,062 INFO L82 PathProgramCache]: Analyzing trace with hash -405838445, now seen corresponding path program 285 times [2021-03-10 22:10:02,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:02,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049074014] [2021-03-10 22:10:02,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:02,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:02,174 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:02,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049074014] [2021-03-10 22:10:02,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138220127] [2021-03-10 22:10:02,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:02,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 22:10:02,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:02,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:10:02,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:02,372 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:02,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:02,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-03-10 22:10:02,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656019737] [2021-03-10 22:10:02,373 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:10:02,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:02,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:10:02,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:10:02,373 INFO L87 Difference]: Start difference. First operand 163 states and 347 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:02,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:02,619 INFO L93 Difference]: Finished difference Result 188 states and 392 transitions. [2021-03-10 22:10:02,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:10:02,620 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:10:02,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:02,620 INFO L225 Difference]: With dead ends: 188 [2021-03-10 22:10:02,620 INFO L226 Difference]: Without dead ends: 186 [2021-03-10 22:10:02,620 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 252.8ms TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:10:02,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-03-10 22:10:02,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 163. [2021-03-10 22:10:02,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 2.1358024691358026) internal successors, (346), 162 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:02,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 346 transitions. [2021-03-10 22:10:02,622 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 346 transitions. Word has length 19 [2021-03-10 22:10:02,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:02,622 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 346 transitions. [2021-03-10 22:10:02,622 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:02,622 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 346 transitions. [2021-03-10 22:10:02,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:10:02,622 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:02,622 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:02,827 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17959 [2021-03-10 22:10:02,827 INFO L428 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:02,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:02,827 INFO L82 PathProgramCache]: Analyzing trace with hash -1867476129, now seen corresponding path program 286 times [2021-03-10 22:10:02,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:02,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655427098] [2021-03-10 22:10:02,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:02,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:02,919 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:02,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655427098] [2021-03-10 22:10:02,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086827159] [2021-03-10 22:10:02,919 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:02,995 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:10:02,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:02,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:10:02,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:03,128 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:03,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:03,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-03-10 22:10:03,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868130583] [2021-03-10 22:10:03,129 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:10:03,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:03,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:10:03,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:10:03,129 INFO L87 Difference]: Start difference. First operand 163 states and 346 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:03,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:03,360 INFO L93 Difference]: Finished difference Result 190 states and 398 transitions. [2021-03-10 22:10:03,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:10:03,361 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:10:03,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:03,361 INFO L225 Difference]: With dead ends: 190 [2021-03-10 22:10:03,361 INFO L226 Difference]: Without dead ends: 190 [2021-03-10 22:10:03,361 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 248.2ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:10:03,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-03-10 22:10:03,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 163. [2021-03-10 22:10:03,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 2.1358024691358026) internal successors, (346), 162 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:03,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 346 transitions. [2021-03-10 22:10:03,363 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 346 transitions. Word has length 19 [2021-03-10 22:10:03,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:03,363 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 346 transitions. [2021-03-10 22:10:03,363 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:03,363 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 346 transitions. [2021-03-10 22:10:03,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:10:03,363 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:03,363 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:03,563 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17968,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:03,563 INFO L428 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:03,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:03,564 INFO L82 PathProgramCache]: Analyzing trace with hash -1858313295, now seen corresponding path program 287 times [2021-03-10 22:10:03,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:03,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928441705] [2021-03-10 22:10:03,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:03,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:03,664 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:03,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928441705] [2021-03-10 22:10:03,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230202543] [2021-03-10 22:10:03,665 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:03,741 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:10:03,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:03,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:10:03,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:03,936 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:03,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:03,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-10 22:10:03,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911259746] [2021-03-10 22:10:03,936 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:10:03,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:03,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:10:03,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:10:03,937 INFO L87 Difference]: Start difference. First operand 163 states and 346 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:04,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:04,221 INFO L93 Difference]: Finished difference Result 207 states and 432 transitions. [2021-03-10 22:10:04,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:10:04,221 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:10:04,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:04,222 INFO L225 Difference]: With dead ends: 207 [2021-03-10 22:10:04,222 INFO L226 Difference]: Without dead ends: 207 [2021-03-10 22:10:04,222 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 262.0ms TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:10:04,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-03-10 22:10:04,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 164. [2021-03-10 22:10:04,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.1349693251533743) internal successors, (348), 163 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:04,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 348 transitions. [2021-03-10 22:10:04,223 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 348 transitions. Word has length 19 [2021-03-10 22:10:04,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:04,223 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 348 transitions. [2021-03-10 22:10:04,223 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:04,223 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 348 transitions. [2021-03-10 22:10:04,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:10:04,224 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:04,224 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:04,424 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 288 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17972 [2021-03-10 22:10:04,424 INFO L428 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:04,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:04,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1051476255, now seen corresponding path program 288 times [2021-03-10 22:10:04,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:04,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397350218] [2021-03-10 22:10:04,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:04,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:04,519 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:04,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397350218] [2021-03-10 22:10:04,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478550936] [2021-03-10 22:10:04,520 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:04,596 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 22:10:04,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:04,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:10:04,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:04,709 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:04,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:04,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-03-10 22:10:04,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840473476] [2021-03-10 22:10:04,709 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:10:04,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:04,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:10:04,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:10:04,709 INFO L87 Difference]: Start difference. First operand 164 states and 348 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:04,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:04,934 INFO L93 Difference]: Finished difference Result 204 states and 426 transitions. [2021-03-10 22:10:04,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:10:04,934 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:10:04,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:04,935 INFO L225 Difference]: With dead ends: 204 [2021-03-10 22:10:04,935 INFO L226 Difference]: Without dead ends: 204 [2021-03-10 22:10:04,935 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 212.0ms TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:10:04,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-03-10 22:10:04,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 165. [2021-03-10 22:10:04,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 2.1341463414634148) internal successors, (350), 164 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:04,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 350 transitions. [2021-03-10 22:10:04,936 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 350 transitions. Word has length 19 [2021-03-10 22:10:04,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:04,936 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 350 transitions. [2021-03-10 22:10:04,936 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:04,936 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 350 transitions. [2021-03-10 22:10:04,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:10:04,937 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:04,937 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:05,137 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17990,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:05,137 INFO L428 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:05,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:05,137 INFO L82 PathProgramCache]: Analyzing trace with hash 36961777, now seen corresponding path program 289 times [2021-03-10 22:10:05,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:05,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456637529] [2021-03-10 22:10:05,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:05,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:05,241 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:05,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456637529] [2021-03-10 22:10:05,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363546653] [2021-03-10 22:10:05,242 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:05,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:05,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:10:05,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:05,430 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:05,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:05,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-03-10 22:10:05,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914490159] [2021-03-10 22:10:05,430 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:10:05,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:05,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:10:05,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:10:05,431 INFO L87 Difference]: Start difference. First operand 165 states and 350 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:05,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:05,634 INFO L93 Difference]: Finished difference Result 201 states and 420 transitions. [2021-03-10 22:10:05,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:10:05,635 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:10:05,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:05,635 INFO L225 Difference]: With dead ends: 201 [2021-03-10 22:10:05,635 INFO L226 Difference]: Without dead ends: 201 [2021-03-10 22:10:05,635 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 206.6ms TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:10:05,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-03-10 22:10:05,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 165. [2021-03-10 22:10:05,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 2.1341463414634148) internal successors, (350), 164 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:05,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 350 transitions. [2021-03-10 22:10:05,637 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 350 transitions. Word has length 19 [2021-03-10 22:10:05,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:05,637 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 350 transitions. [2021-03-10 22:10:05,637 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:05,637 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 350 transitions. [2021-03-10 22:10:05,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:10:05,637 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:05,637 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:05,847 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17994 [2021-03-10 22:10:05,847 INFO L428 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:05,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:05,847 INFO L82 PathProgramCache]: Analyzing trace with hash -410375946, now seen corresponding path program 290 times [2021-03-10 22:10:05,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:05,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843933650] [2021-03-10 22:10:05,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:05,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:05,957 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:05,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843933650] [2021-03-10 22:10:05,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777348013] [2021-03-10 22:10:05,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:06,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:10:06,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:06,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:10:06,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:06,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:10:06,314 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:06,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:10:06,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:10:06,318 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:06,391 INFO L628 ElimStorePlain]: treesize reduction 51, result has 51.4 percent of original size [2021-03-10 22:10:06,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:10:06,394 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:06,421 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:10:06,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:10:06,425 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:06,450 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:10:06,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:10:06,454 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:06,478 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:10:06,479 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:10:06,479 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 7 variables, input treesize:128, output treesize:13 [2021-03-10 22:10:06,518 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:06,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:06,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-03-10 22:10:06,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420604213] [2021-03-10 22:10:06,518 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:10:06,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:06,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:10:06,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:10:06,519 INFO L87 Difference]: Start difference. First operand 165 states and 350 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:06,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:06,769 INFO L93 Difference]: Finished difference Result 182 states and 382 transitions. [2021-03-10 22:10:06,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:10:06,769 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:10:06,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:06,770 INFO L225 Difference]: With dead ends: 182 [2021-03-10 22:10:06,770 INFO L226 Difference]: Without dead ends: 182 [2021-03-10 22:10:06,770 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 342.4ms TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:10:06,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-03-10 22:10:06,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 162. [2021-03-10 22:10:06,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 2.1366459627329193) internal successors, (344), 161 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:06,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 344 transitions. [2021-03-10 22:10:06,771 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 344 transitions. Word has length 19 [2021-03-10 22:10:06,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:06,771 INFO L480 AbstractCegarLoop]: Abstraction has 162 states and 344 transitions. [2021-03-10 22:10:06,771 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:06,771 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 344 transitions. [2021-03-10 22:10:06,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:10:06,772 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:06,772 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:06,972 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 291 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18003 [2021-03-10 22:10:06,972 INFO L428 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:06,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:06,972 INFO L82 PathProgramCache]: Analyzing trace with hash 324225371, now seen corresponding path program 291 times [2021-03-10 22:10:06,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:06,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248074932] [2021-03-10 22:10:06,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:06,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:07,064 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:07,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248074932] [2021-03-10 22:10:07,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699543928] [2021-03-10 22:10:07,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 22:10:07,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:10:07,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:07,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:10:07,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:07,325 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:07,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:07,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-10 22:10:07,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990480736] [2021-03-10 22:10:07,325 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:10:07,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:07,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:10:07,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:10:07,326 INFO L87 Difference]: Start difference. First operand 162 states and 344 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:07,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:07,641 INFO L93 Difference]: Finished difference Result 199 states and 416 transitions. [2021-03-10 22:10:07,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:10:07,642 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:10:07,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:07,642 INFO L225 Difference]: With dead ends: 199 [2021-03-10 22:10:07,642 INFO L226 Difference]: Without dead ends: 199 [2021-03-10 22:10:07,642 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 267.0ms TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:10:07,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-03-10 22:10:07,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 164. [2021-03-10 22:10:07,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.1349693251533743) internal successors, (348), 163 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:07,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 348 transitions. [2021-03-10 22:10:07,644 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 348 transitions. Word has length 19 [2021-03-10 22:10:07,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:07,644 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 348 transitions. [2021-03-10 22:10:07,644 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:07,644 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 348 transitions. [2021-03-10 22:10:07,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:10:07,644 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:07,644 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:07,844 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18027 [2021-03-10 22:10:07,844 INFO L428 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:07,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:07,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1060952375, now seen corresponding path program 292 times [2021-03-10 22:10:07,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:07,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773128352] [2021-03-10 22:10:07,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:07,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:07,936 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:07,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773128352] [2021-03-10 22:10:07,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6960493] [2021-03-10 22:10:07,936 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:08,013 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:10:08,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:08,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:10:08,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:08,186 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:08,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:08,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-03-10 22:10:08,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224678646] [2021-03-10 22:10:08,186 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:10:08,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:08,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:10:08,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:10:08,187 INFO L87 Difference]: Start difference. First operand 164 states and 348 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:08,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:08,697 INFO L93 Difference]: Finished difference Result 229 states and 476 transitions. [2021-03-10 22:10:08,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 22:10:08,698 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:10:08,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:08,698 INFO L225 Difference]: With dead ends: 229 [2021-03-10 22:10:08,698 INFO L226 Difference]: Without dead ends: 229 [2021-03-10 22:10:08,698 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 370.7ms TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:10:08,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-03-10 22:10:08,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 166. [2021-03-10 22:10:08,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 2.1333333333333333) internal successors, (352), 165 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:08,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 352 transitions. [2021-03-10 22:10:08,700 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 352 transitions. Word has length 19 [2021-03-10 22:10:08,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:08,700 INFO L480 AbstractCegarLoop]: Abstraction has 166 states and 352 transitions. [2021-03-10 22:10:08,700 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:08,700 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 352 transitions. [2021-03-10 22:10:08,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:10:08,700 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:08,700 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:08,901 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 293 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18048 [2021-03-10 22:10:08,901 INFO L428 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:08,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:08,901 INFO L82 PathProgramCache]: Analyzing trace with hash -2075466853, now seen corresponding path program 293 times [2021-03-10 22:10:08,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:08,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147541030] [2021-03-10 22:10:08,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:08,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:08,994 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:08,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147541030] [2021-03-10 22:10:08,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840678477] [2021-03-10 22:10:08,994 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:09,071 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 22:10:09,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:09,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:10:09,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:09,328 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:09,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:09,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-03-10 22:10:09,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084433197] [2021-03-10 22:10:09,328 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:10:09,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:09,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:10:09,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:10:09,328 INFO L87 Difference]: Start difference. First operand 166 states and 352 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:09,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:09,873 INFO L93 Difference]: Finished difference Result 226 states and 471 transitions. [2021-03-10 22:10:09,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 22:10:09,873 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:10:09,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:09,874 INFO L225 Difference]: With dead ends: 226 [2021-03-10 22:10:09,874 INFO L226 Difference]: Without dead ends: 226 [2021-03-10 22:10:09,874 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 430.3ms TimeCoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2021-03-10 22:10:09,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-03-10 22:10:09,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 164. [2021-03-10 22:10:09,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.1349693251533743) internal successors, (348), 163 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:09,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 348 transitions. [2021-03-10 22:10:09,876 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 348 transitions. Word has length 19 [2021-03-10 22:10:09,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:09,876 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 348 transitions. [2021-03-10 22:10:09,876 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:09,876 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 348 transitions. [2021-03-10 22:10:09,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:10:09,876 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:09,876 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:10,076 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 294 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18066 [2021-03-10 22:10:10,076 INFO L428 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:10,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:10,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1772162720, now seen corresponding path program 294 times [2021-03-10 22:10:10,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:10,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402197173] [2021-03-10 22:10:10,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:10,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:10,179 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:10,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402197173] [2021-03-10 22:10:10,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129015105] [2021-03-10 22:10:10,179 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:10,256 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:10:10,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:10,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:10:10,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:10,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:10:10,499 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:10,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:10:10,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:10:10,504 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:10,613 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2021-03-10 22:10:10,613 INFO L628 ElimStorePlain]: treesize reduction 86, result has 48.8 percent of original size [2021-03-10 22:10:10,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:10:10,618 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:10,659 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:10:10,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:10:10,664 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:10,703 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:10:10,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:10:10,708 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:10,746 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:10:10,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:10:10,750 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:10,786 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:10:10,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:10:10,791 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:10,826 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:10:10,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:10:10,830 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:10,863 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:10:10,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:10:10,867 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:10,899 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:10:10,900 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:10:10,900 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:199, output treesize:13 [2021-03-10 22:10:10,939 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:10,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:10,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-03-10 22:10:10,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857527725] [2021-03-10 22:10:10,939 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:10:10,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:10,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:10:10,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:10:10,940 INFO L87 Difference]: Start difference. First operand 164 states and 348 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:11,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:11,203 INFO L93 Difference]: Finished difference Result 182 states and 382 transitions. [2021-03-10 22:10:11,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:10:11,204 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:10:11,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:11,204 INFO L225 Difference]: With dead ends: 182 [2021-03-10 22:10:11,204 INFO L226 Difference]: Without dead ends: 182 [2021-03-10 22:10:11,204 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 339.8ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:10:11,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-03-10 22:10:11,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 162. [2021-03-10 22:10:11,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 2.1366459627329193) internal successors, (344), 161 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:11,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 344 transitions. [2021-03-10 22:10:11,206 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 344 transitions. Word has length 19 [2021-03-10 22:10:11,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:11,206 INFO L480 AbstractCegarLoop]: Abstraction has 162 states and 344 transitions. [2021-03-10 22:10:11,206 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:11,206 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 344 transitions. [2021-03-10 22:10:11,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:10:11,206 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:11,206 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:11,419 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18100,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:11,419 INFO L428 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:11,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:11,419 INFO L82 PathProgramCache]: Analyzing trace with hash -20716577, now seen corresponding path program 295 times [2021-03-10 22:10:11,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:11,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519965887] [2021-03-10 22:10:11,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:11,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:11,526 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:11,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519965887] [2021-03-10 22:10:11,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736055328] [2021-03-10 22:10:11,526 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:11,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:11,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:10:11,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:11,802 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:11,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:11,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-10 22:10:11,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148345046] [2021-03-10 22:10:11,803 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:10:11,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:11,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:10:11,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:10:11,803 INFO L87 Difference]: Start difference. First operand 162 states and 344 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:12,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:12,278 INFO L93 Difference]: Finished difference Result 208 states and 434 transitions. [2021-03-10 22:10:12,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 22:10:12,279 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:10:12,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:12,279 INFO L225 Difference]: With dead ends: 208 [2021-03-10 22:10:12,279 INFO L226 Difference]: Without dead ends: 208 [2021-03-10 22:10:12,279 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 387.3ms TimeCoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2021-03-10 22:10:12,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-03-10 22:10:12,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 170. [2021-03-10 22:10:12,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.1301775147928996) internal successors, (360), 169 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:12,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 360 transitions. [2021-03-10 22:10:12,281 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 360 transitions. Word has length 19 [2021-03-10 22:10:12,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:12,281 INFO L480 AbstractCegarLoop]: Abstraction has 170 states and 360 transitions. [2021-03-10 22:10:12,281 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:12,281 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 360 transitions. [2021-03-10 22:10:12,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:10:12,281 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:12,281 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:12,482 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 296 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18122 [2021-03-10 22:10:12,482 INFO L428 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:12,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:12,482 INFO L82 PathProgramCache]: Analyzing trace with hash -1035231055, now seen corresponding path program 296 times [2021-03-10 22:10:12,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:12,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456702279] [2021-03-10 22:10:12,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:12,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:12,596 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:12,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456702279] [2021-03-10 22:10:12,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111391690] [2021-03-10 22:10:12,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:12,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:10:12,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:12,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:10:12,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:12,980 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:12,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:12,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-10 22:10:12,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126446400] [2021-03-10 22:10:12,980 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:10:12,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:12,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:10:12,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:10:12,980 INFO L87 Difference]: Start difference. First operand 170 states and 360 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:13,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:13,666 INFO L93 Difference]: Finished difference Result 235 states and 489 transitions. [2021-03-10 22:10:13,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 22:10:13,667 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:10:13,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:13,667 INFO L225 Difference]: With dead ends: 235 [2021-03-10 22:10:13,667 INFO L226 Difference]: Without dead ends: 235 [2021-03-10 22:10:13,667 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 537.1ms TimeCoverageRelationStatistics Valid=166, Invalid=826, Unknown=0, NotChecked=0, Total=992 [2021-03-10 22:10:13,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-03-10 22:10:13,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 168. [2021-03-10 22:10:13,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.1317365269461077) internal successors, (356), 167 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:13,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 356 transitions. [2021-03-10 22:10:13,669 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 356 transitions. Word has length 19 [2021-03-10 22:10:13,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:13,669 INFO L480 AbstractCegarLoop]: Abstraction has 168 states and 356 transitions. [2021-03-10 22:10:13,669 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:13,669 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 356 transitions. [2021-03-10 22:10:13,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:10:13,669 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:13,669 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:13,870 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18140 [2021-03-10 22:10:13,870 INFO L428 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:13,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:13,870 INFO L82 PathProgramCache]: Analyzing trace with hash -447485733, now seen corresponding path program 297 times [2021-03-10 22:10:13,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:13,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565204271] [2021-03-10 22:10:13,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:13,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:13,981 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:13,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565204271] [2021-03-10 22:10:13,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441118153] [2021-03-10 22:10:13,982 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 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 [2021-03-10 22:10:14,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 22:10:14,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:14,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:10:14,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:14,296 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:14,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:14,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-10 22:10:14,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180972019] [2021-03-10 22:10:14,296 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:10:14,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:14,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:10:14,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:10:14,297 INFO L87 Difference]: Start difference. First operand 168 states and 356 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:14,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:14,606 INFO L93 Difference]: Finished difference Result 217 states and 447 transitions. [2021-03-10 22:10:14,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 22:10:14,606 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:10:14,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:14,607 INFO L225 Difference]: With dead ends: 217 [2021-03-10 22:10:14,607 INFO L226 Difference]: Without dead ends: 217 [2021-03-10 22:10:14,607 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 351.2ms TimeCoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2021-03-10 22:10:14,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-03-10 22:10:14,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 166. [2021-03-10 22:10:14,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 2.1333333333333333) internal successors, (352), 165 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:14,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 352 transitions. [2021-03-10 22:10:14,608 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 352 transitions. Word has length 19 [2021-03-10 22:10:14,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:14,609 INFO L480 AbstractCegarLoop]: Abstraction has 166 states and 352 transitions. [2021-03-10 22:10:14,609 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:14,609 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 352 transitions. [2021-03-10 22:10:14,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:10:14,609 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:14,609 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:14,809 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18190,298 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:14,809 INFO L428 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:14,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:14,810 INFO L82 PathProgramCache]: Analyzing trace with hash -894823456, now seen corresponding path program 298 times [2021-03-10 22:10:14,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:14,810 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832595491] [2021-03-10 22:10:14,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:14,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:14,910 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:14,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832595491] [2021-03-10 22:10:14,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419563069] [2021-03-10 22:10:14,910 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:14,988 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:10:14,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:14,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:10:14,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:15,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:10:15,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:10:15,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:10:15,431 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:15,433 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:10:15,434 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:15,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:10:15,438 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:15,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:10:15,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:10:15,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:10:15,443 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:15,445 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:10:15,446 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:15,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:10:15,450 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:15,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:10:15,453 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:15,455 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:10:15,456 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:15,527 INFO L628 ElimStorePlain]: treesize reduction 44, result has 42.9 percent of original size [2021-03-10 22:10:15,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:10:15,531 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:15,561 INFO L628 ElimStorePlain]: treesize reduction 1, result has 96.6 percent of original size [2021-03-10 22:10:15,562 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:10:15,562 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 3 variables, input treesize:199, output treesize:12 [2021-03-10 22:10:15,592 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:15,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:15,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-10 22:10:15,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539000937] [2021-03-10 22:10:15,592 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:10:15,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:15,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:10:15,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:10:15,592 INFO L87 Difference]: Start difference. First operand 166 states and 352 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:16,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:16,108 INFO L93 Difference]: Finished difference Result 252 states and 514 transitions. [2021-03-10 22:10:16,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 22:10:16,109 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:10:16,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:16,109 INFO L225 Difference]: With dead ends: 252 [2021-03-10 22:10:16,110 INFO L226 Difference]: Without dead ends: 252 [2021-03-10 22:10:16,110 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 412.9ms TimeCoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2021-03-10 22:10:16,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-03-10 22:10:16,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 169. [2021-03-10 22:10:16,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 2.1547619047619047) internal successors, (362), 168 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:16,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 362 transitions. [2021-03-10 22:10:16,111 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 362 transitions. Word has length 19 [2021-03-10 22:10:16,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:16,111 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 362 transitions. [2021-03-10 22:10:16,112 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:16,112 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 362 transitions. [2021-03-10 22:10:16,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:10:16,112 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:16,112 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:16,312 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 299 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18226 [2021-03-10 22:10:16,312 INFO L428 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:16,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:16,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1430053258, now seen corresponding path program 299 times [2021-03-10 22:10:16,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:16,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316953884] [2021-03-10 22:10:16,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:16,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:16,418 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:16,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316953884] [2021-03-10 22:10:16,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321195885] [2021-03-10 22:10:16,419 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 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 [2021-03-10 22:10:16,504 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 22:10:16,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:16,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:10:16,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:16,705 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:10:16,706 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:16,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:10:16,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:10:16,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:10:16,710 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:16,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:10:16,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:10:16,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:10:16,714 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:16,716 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:10:16,717 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:16,733 INFO L628 ElimStorePlain]: treesize reduction 4, result has 81.8 percent of original size [2021-03-10 22:10:16,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:10:16,736 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:16,741 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:10:16,742 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:10:16,742 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:114, output treesize:6 [2021-03-10 22:10:16,751 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:16,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:16,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-10 22:10:16,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735894555] [2021-03-10 22:10:16,751 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:10:16,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:16,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:10:16,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:10:16,752 INFO L87 Difference]: Start difference. First operand 169 states and 362 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:17,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:17,188 INFO L93 Difference]: Finished difference Result 210 states and 439 transitions. [2021-03-10 22:10:17,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 22:10:17,189 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:10:17,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:17,189 INFO L225 Difference]: With dead ends: 210 [2021-03-10 22:10:17,189 INFO L226 Difference]: Without dead ends: 210 [2021-03-10 22:10:17,189 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 331.6ms TimeCoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:10:17,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-03-10 22:10:17,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 167. [2021-03-10 22:10:17,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.13855421686747) internal successors, (355), 166 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:17,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 355 transitions. [2021-03-10 22:10:17,191 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 355 transitions. Word has length 19 [2021-03-10 22:10:17,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:17,191 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 355 transitions. [2021-03-10 22:10:17,191 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:17,191 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 355 transitions. [2021-03-10 22:10:17,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:10:17,191 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:17,191 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:17,391 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18361 [2021-03-10 22:10:17,391 INFO L428 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:17,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:17,392 INFO L82 PathProgramCache]: Analyzing trace with hash -1794773793, now seen corresponding path program 300 times [2021-03-10 22:10:17,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:17,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988633126] [2021-03-10 22:10:17,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:17,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:17,486 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:17,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988633126] [2021-03-10 22:10:17,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163714762] [2021-03-10 22:10:17,487 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:17,565 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 22:10:17,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:17,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:10:17,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:17,792 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:17,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:17,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-10 22:10:17,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686462205] [2021-03-10 22:10:17,792 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:10:17,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:17,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:10:17,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:10:17,792 INFO L87 Difference]: Start difference. First operand 167 states and 355 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:18,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:18,109 INFO L93 Difference]: Finished difference Result 184 states and 384 transitions. [2021-03-10 22:10:18,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 22:10:18,109 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:10:18,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:18,110 INFO L225 Difference]: With dead ends: 184 [2021-03-10 22:10:18,110 INFO L226 Difference]: Without dead ends: 180 [2021-03-10 22:10:18,110 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 361.1ms TimeCoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:10:18,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-03-10 22:10:18,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 167. [2021-03-10 22:10:18,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.1325301204819276) internal successors, (354), 166 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:18,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 354 transitions. [2021-03-10 22:10:18,111 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 354 transitions. Word has length 19 [2021-03-10 22:10:18,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:18,111 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 354 transitions. [2021-03-10 22:10:18,111 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:18,111 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 354 transitions. [2021-03-10 22:10:18,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:10:18,112 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:18,112 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:18,312 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18397,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:18,312 INFO L428 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:18,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:18,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1170864497, now seen corresponding path program 301 times [2021-03-10 22:10:18,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:18,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803063101] [2021-03-10 22:10:18,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:18,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:18,408 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:18,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803063101] [2021-03-10 22:10:18,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746288278] [2021-03-10 22:10:18,408 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 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 [2021-03-10 22:10:18,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:18,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:10:18,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:18,596 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:18,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:18,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-03-10 22:10:18,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717384488] [2021-03-10 22:10:18,597 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:10:18,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:18,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:10:18,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:10:18,597 INFO L87 Difference]: Start difference. First operand 167 states and 354 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:18,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:18,805 INFO L93 Difference]: Finished difference Result 192 states and 403 transitions. [2021-03-10 22:10:18,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:10:18,806 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:10:18,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:18,806 INFO L225 Difference]: With dead ends: 192 [2021-03-10 22:10:18,806 INFO L226 Difference]: Without dead ends: 192 [2021-03-10 22:10:18,806 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 229.3ms TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:10:18,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-03-10 22:10:18,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 167. [2021-03-10 22:10:18,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.1325301204819276) internal successors, (354), 166 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:18,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 354 transitions. [2021-03-10 22:10:18,807 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 354 transitions. Word has length 19 [2021-03-10 22:10:18,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:18,808 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 354 transitions. [2021-03-10 22:10:18,808 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:18,808 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 354 transitions. [2021-03-10 22:10:18,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:10:18,808 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:18,808 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:19,008 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 302 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18424 [2021-03-10 22:10:19,008 INFO L428 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:19,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:19,008 INFO L82 PathProgramCache]: Analyzing trace with hash 1180027331, now seen corresponding path program 302 times [2021-03-10 22:10:19,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:19,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86285977] [2021-03-10 22:10:19,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:19,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:19,121 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:19,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86285977] [2021-03-10 22:10:19,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697447216] [2021-03-10 22:10:19,122 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:19,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:10:19,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:19,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:10:19,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:19,331 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:19,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:19,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-10 22:10:19,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014125755] [2021-03-10 22:10:19,331 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:10:19,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:19,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:10:19,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:10:19,331 INFO L87 Difference]: Start difference. First operand 167 states and 354 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:19,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:19,616 INFO L93 Difference]: Finished difference Result 212 states and 443 transitions. [2021-03-10 22:10:19,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:10:19,617 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:10:19,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:19,617 INFO L225 Difference]: With dead ends: 212 [2021-03-10 22:10:19,617 INFO L226 Difference]: Without dead ends: 212 [2021-03-10 22:10:19,617 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 331.3ms TimeCoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:10:19,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-03-10 22:10:19,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 167. [2021-03-10 22:10:19,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.1325301204819276) internal successors, (354), 166 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:19,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 354 transitions. [2021-03-10 22:10:19,619 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 354 transitions. Word has length 19 [2021-03-10 22:10:19,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:19,619 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 354 transitions. [2021-03-10 22:10:19,619 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:19,619 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 354 transitions. [2021-03-10 22:10:19,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:10:19,619 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:19,619 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:19,819 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18428,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:19,819 INFO L428 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:19,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:19,820 INFO L82 PathProgramCache]: Analyzing trace with hash -205150415, now seen corresponding path program 303 times [2021-03-10 22:10:19,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:19,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955469919] [2021-03-10 22:10:19,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:19,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:19,920 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:19,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955469919] [2021-03-10 22:10:19,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827513519] [2021-03-10 22:10:19,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:20,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 22:10:20,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:20,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:10:20,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:20,112 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:20,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:20,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-03-10 22:10:20,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421273071] [2021-03-10 22:10:20,112 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:10:20,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:20,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:10:20,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:10:20,113 INFO L87 Difference]: Start difference. First operand 167 states and 354 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:20,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:20,527 INFO L93 Difference]: Finished difference Result 226 states and 471 transitions. [2021-03-10 22:10:20,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:10:20,527 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:10:20,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:20,528 INFO L225 Difference]: With dead ends: 226 [2021-03-10 22:10:20,528 INFO L226 Difference]: Without dead ends: 226 [2021-03-10 22:10:20,528 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 339.2ms TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:10:20,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-03-10 22:10:20,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 167. [2021-03-10 22:10:20,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.1325301204819276) internal successors, (354), 166 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:20,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 354 transitions. [2021-03-10 22:10:20,529 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 354 transitions. Word has length 19 [2021-03-10 22:10:20,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:20,529 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 354 transitions. [2021-03-10 22:10:20,529 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:20,529 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 354 transitions. [2021-03-10 22:10:20,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:10:20,530 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:20,530 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:20,731 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 304 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18432 [2021-03-10 22:10:20,731 INFO L428 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:20,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:20,731 INFO L82 PathProgramCache]: Analyzing trace with hash -1219664893, now seen corresponding path program 304 times [2021-03-10 22:10:20,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:20,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423123407] [2021-03-10 22:10:20,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:20,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:20,841 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:20,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423123407] [2021-03-10 22:10:20,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195717456] [2021-03-10 22:10:20,841 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:20,920 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:10:20,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:20,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:10:20,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:21,036 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:21,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:21,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-03-10 22:10:21,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220227597] [2021-03-10 22:10:21,037 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:10:21,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:21,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:10:21,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:10:21,037 INFO L87 Difference]: Start difference. First operand 167 states and 354 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:21,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:21,468 INFO L93 Difference]: Finished difference Result 234 states and 481 transitions. [2021-03-10 22:10:21,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:10:21,469 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:10:21,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:21,469 INFO L225 Difference]: With dead ends: 234 [2021-03-10 22:10:21,469 INFO L226 Difference]: Without dead ends: 234 [2021-03-10 22:10:21,469 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 413.3ms TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:10:21,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-03-10 22:10:21,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 168. [2021-03-10 22:10:21,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.143712574850299) internal successors, (358), 167 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:21,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 358 transitions. [2021-03-10 22:10:21,471 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 358 transitions. Word has length 19 [2021-03-10 22:10:21,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:21,471 INFO L480 AbstractCegarLoop]: Abstraction has 168 states and 358 transitions. [2021-03-10 22:10:21,471 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:21,471 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 358 transitions. [2021-03-10 22:10:21,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:10:21,471 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:21,471 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:21,671 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18436 [2021-03-10 22:10:21,671 INFO L428 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:21,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:21,672 INFO L82 PathProgramCache]: Analyzing trace with hash -1187717940, now seen corresponding path program 305 times [2021-03-10 22:10:21,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:21,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037642405] [2021-03-10 22:10:21,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:21,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:21,787 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:21,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037642405] [2021-03-10 22:10:21,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182984086] [2021-03-10 22:10:21,787 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:21,867 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:10:21,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:21,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:10:21,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:22,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:10:22,146 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:22,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:10:22,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:10:22,151 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:22,228 INFO L628 ElimStorePlain]: treesize reduction 59, result has 49.6 percent of original size [2021-03-10 22:10:22,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:10:22,233 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:22,261 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:10:22,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:10:22,265 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:22,292 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:10:22,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:10:22,295 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:22,321 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:10:22,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:10:22,325 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:22,349 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:10:22,350 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 5 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:10:22,350 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:140, output treesize:13 [2021-03-10 22:10:22,394 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:22,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:22,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 22:10:22,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86291853] [2021-03-10 22:10:22,394 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:10:22,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:22,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:10:22,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:10:22,394 INFO L87 Difference]: Start difference. First operand 168 states and 358 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:22,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:22,727 INFO L93 Difference]: Finished difference Result 203 states and 415 transitions. [2021-03-10 22:10:22,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:10:22,728 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:10:22,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:22,728 INFO L225 Difference]: With dead ends: 203 [2021-03-10 22:10:22,728 INFO L226 Difference]: Without dead ends: 200 [2021-03-10 22:10:22,728 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 462.8ms TimeCoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:10:22,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-03-10 22:10:22,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 172. [2021-03-10 22:10:22,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 2.1403508771929824) internal successors, (366), 171 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:22,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 366 transitions. [2021-03-10 22:10:22,730 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 366 transitions. Word has length 19 [2021-03-10 22:10:22,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:22,730 INFO L480 AbstractCegarLoop]: Abstraction has 172 states and 366 transitions. [2021-03-10 22:10:22,730 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:22,730 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 366 transitions. [2021-03-10 22:10:22,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:10:22,730 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:22,730 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:22,930 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 306 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18445 [2021-03-10 22:10:22,930 INFO L428 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:22,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:22,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1667002616, now seen corresponding path program 306 times [2021-03-10 22:10:22,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:22,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976851173] [2021-03-10 22:10:22,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:22,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:23,035 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:23,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976851173] [2021-03-10 22:10:23,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665633876] [2021-03-10 22:10:23,035 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 22:10:23,114 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 22:10:23,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:23,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:10:23,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:23,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:10:23,442 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:23,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:10:23,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:10:23,447 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:23,567 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 48 [2021-03-10 22:10:23,568 INFO L628 ElimStorePlain]: treesize reduction 106, result has 43.3 percent of original size [2021-03-10 22:10:23,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:10:23,572 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:23,614 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:10:23,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:10:23,619 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:23,658 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:10:23,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:10:23,663 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:23,701 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:10:23,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:10:23,706 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:23,742 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:10:23,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:10:23,747 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:23,781 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:10:23,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:10:23,785 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:23,819 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:10:23,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:10:23,823 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:23,854 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:10:23,856 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:10:23,856 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:199, output treesize:13 [2021-03-10 22:10:23,897 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:23,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:23,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 22:10:23,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625120741] [2021-03-10 22:10:23,897 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:10:23,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:23,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:10:23,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:10:23,897 INFO L87 Difference]: Start difference. First operand 172 states and 366 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:24,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:24,307 INFO L93 Difference]: Finished difference Result 210 states and 432 transitions. [2021-03-10 22:10:24,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 22:10:24,308 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:10:24,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:24,308 INFO L225 Difference]: With dead ends: 210 [2021-03-10 22:10:24,308 INFO L226 Difference]: Without dead ends: 210 [2021-03-10 22:10:24,308 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 504.7ms TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:10:24,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-03-10 22:10:24,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 169. [2021-03-10 22:10:24,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 2.136904761904762) internal successors, (359), 168 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:24,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 359 transitions. [2021-03-10 22:10:24,310 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 359 transitions. Word has length 19 [2021-03-10 22:10:24,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:24,310 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 359 transitions. [2021-03-10 22:10:24,310 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:24,310 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 359 transitions. [2021-03-10 22:10:24,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:10:24,310 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:24,310 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:24,510 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18465 [2021-03-10 22:10:24,510 INFO L428 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:24,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:24,511 INFO L82 PathProgramCache]: Analyzing trace with hash 652303187, now seen corresponding path program 307 times [2021-03-10 22:10:24,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:24,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807508931] [2021-03-10 22:10:24,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:24,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:24,610 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:24,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807508931] [2021-03-10 22:10:24,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616717845] [2021-03-10 22:10:24,610 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:24,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:24,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:10:24,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:25,008 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:25,009 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:25,009 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 22:10:25,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669806229] [2021-03-10 22:10:25,009 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:10:25,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:25,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:10:25,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:10:25,009 INFO L87 Difference]: Start difference. First operand 169 states and 359 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:25,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:25,466 INFO L93 Difference]: Finished difference Result 212 states and 441 transitions. [2021-03-10 22:10:25,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:10:25,466 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:10:25,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:25,467 INFO L225 Difference]: With dead ends: 212 [2021-03-10 22:10:25,467 INFO L226 Difference]: Without dead ends: 210 [2021-03-10 22:10:25,467 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 456.8ms TimeCoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:10:25,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-03-10 22:10:25,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 165. [2021-03-10 22:10:25,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 2.1341463414634148) internal successors, (350), 164 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:25,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 350 transitions. [2021-03-10 22:10:25,468 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 350 transitions. Word has length 19 [2021-03-10 22:10:25,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:25,468 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 350 transitions. [2021-03-10 22:10:25,468 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:25,468 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 350 transitions. [2021-03-10 22:10:25,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:10:25,468 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:25,469 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:25,669 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18485,308 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:25,669 INFO L428 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:25,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:25,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1555771848, now seen corresponding path program 308 times [2021-03-10 22:10:25,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:25,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332551347] [2021-03-10 22:10:25,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:25,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:25,765 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:25,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332551347] [2021-03-10 22:10:25,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475739643] [2021-03-10 22:10:25,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:25,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:10:25,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:25,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:10:25,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:26,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:10:26,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:10:26,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:10:26,036 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:26,040 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:10:26,040 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:26,156 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 48 [2021-03-10 22:10:26,156 INFO L628 ElimStorePlain]: treesize reduction 87, result has 48.2 percent of original size [2021-03-10 22:10:26,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:10:26,161 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:26,205 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:10:26,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:10:26,209 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:26,253 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:10:26,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:10:26,258 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:26,296 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:10:26,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:10:26,300 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:26,336 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:10:26,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:10:26,341 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:26,375 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:10:26,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:10:26,380 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:26,413 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:10:26,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:10:26,417 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:26,449 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:10:26,450 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:10:26,450 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:199, output treesize:13 [2021-03-10 22:10:26,488 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:26,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:26,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-03-10 22:10:26,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751967996] [2021-03-10 22:10:26,489 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:10:26,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:26,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:10:26,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:10:26,489 INFO L87 Difference]: Start difference. First operand 165 states and 350 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:26,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:26,831 INFO L93 Difference]: Finished difference Result 193 states and 406 transitions. [2021-03-10 22:10:26,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:10:26,831 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:10:26,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:26,832 INFO L225 Difference]: With dead ends: 193 [2021-03-10 22:10:26,832 INFO L226 Difference]: Without dead ends: 193 [2021-03-10 22:10:26,832 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 334.3ms TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:10:26,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-03-10 22:10:26,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 163. [2021-03-10 22:10:26,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 2.1358024691358026) internal successors, (346), 162 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:26,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 346 transitions. [2021-03-10 22:10:26,833 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 346 transitions. Word has length 19 [2021-03-10 22:10:26,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:26,833 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 346 transitions. [2021-03-10 22:10:26,833 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:26,833 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 346 transitions. [2021-03-10 22:10:26,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:10:26,834 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:26,834 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:27,034 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18533 [2021-03-10 22:10:27,034 INFO L428 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:27,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:27,034 INFO L82 PathProgramCache]: Analyzing trace with hash -1993179389, now seen corresponding path program 309 times [2021-03-10 22:10:27,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:27,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421164986] [2021-03-10 22:10:27,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:27,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:27,134 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:27,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421164986] [2021-03-10 22:10:27,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728573806] [2021-03-10 22:10:27,135 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:27,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:10:27,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:27,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:10:27,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:27,447 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:27,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:27,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:10:27,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055632887] [2021-03-10 22:10:27,447 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:10:27,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:27,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:10:27,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:10:27,448 INFO L87 Difference]: Start difference. First operand 163 states and 346 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:27,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:27,710 INFO L93 Difference]: Finished difference Result 213 states and 445 transitions. [2021-03-10 22:10:27,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:10:27,711 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:10:27,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:27,711 INFO L225 Difference]: With dead ends: 213 [2021-03-10 22:10:27,711 INFO L226 Difference]: Without dead ends: 213 [2021-03-10 22:10:27,712 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 302.5ms TimeCoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:10:27,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-03-10 22:10:27,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 165. [2021-03-10 22:10:27,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 2.1341463414634148) internal successors, (350), 164 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:27,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 350 transitions. [2021-03-10 22:10:27,715 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 350 transitions. Word has length 19 [2021-03-10 22:10:27,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:27,715 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 350 transitions. [2021-03-10 22:10:27,715 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:27,715 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 350 transitions. [2021-03-10 22:10:27,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:10:27,715 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:27,715 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:27,915 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18554 [2021-03-10 22:10:27,916 INFO L428 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:27,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:27,916 INFO L82 PathProgramCache]: Analyzing trace with hash 916610161, now seen corresponding path program 310 times [2021-03-10 22:10:27,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:27,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646081156] [2021-03-10 22:10:27,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:27,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:28,019 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:28,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646081156] [2021-03-10 22:10:28,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037221359] [2021-03-10 22:10:28,019 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:28,104 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:10:28,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:28,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:10:28,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:28,333 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:28,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:28,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:10:28,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131179024] [2021-03-10 22:10:28,333 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:10:28,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:28,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:10:28,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:10:28,334 INFO L87 Difference]: Start difference. First operand 165 states and 350 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:28,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:28,852 INFO L93 Difference]: Finished difference Result 233 states and 485 transitions. [2021-03-10 22:10:28,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 22:10:28,852 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:10:28,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:28,853 INFO L225 Difference]: With dead ends: 233 [2021-03-10 22:10:28,853 INFO L226 Difference]: Without dead ends: 233 [2021-03-10 22:10:28,853 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 500.8ms TimeCoverageRelationStatistics Valid=135, Invalid=795, Unknown=0, NotChecked=0, Total=930 [2021-03-10 22:10:28,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-03-10 22:10:28,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 166. [2021-03-10 22:10:28,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 2.1333333333333333) internal successors, (352), 165 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:28,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 352 transitions. [2021-03-10 22:10:28,854 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 352 transitions. Word has length 19 [2021-03-10 22:10:28,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:28,855 INFO L480 AbstractCegarLoop]: Abstraction has 166 states and 352 transitions. [2021-03-10 22:10:28,855 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:28,855 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 352 transitions. [2021-03-10 22:10:28,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:10:28,855 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:28,855 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:29,055 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18572,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:29,055 INFO L428 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:29,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:29,055 INFO L82 PathProgramCache]: Analyzing trace with hash -97904317, now seen corresponding path program 311 times [2021-03-10 22:10:29,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:29,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462476200] [2021-03-10 22:10:29,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:29,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:29,159 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:29,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462476200] [2021-03-10 22:10:29,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812278336] [2021-03-10 22:10:29,159 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:29,242 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 22:10:29,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:29,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:10:29,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:29,633 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:29,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:29,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:10:29,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301911761] [2021-03-10 22:10:29,633 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:10:29,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:29,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:10:29,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:10:29,633 INFO L87 Difference]: Start difference. First operand 166 states and 352 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:30,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:30,338 INFO L93 Difference]: Finished difference Result 245 states and 509 transitions. [2021-03-10 22:10:30,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 22:10:30,338 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:10:30,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:30,339 INFO L225 Difference]: With dead ends: 245 [2021-03-10 22:10:30,339 INFO L226 Difference]: Without dead ends: 245 [2021-03-10 22:10:30,339 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 668.8ms TimeCoverageRelationStatistics Valid=181, Invalid=941, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 22:10:30,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-03-10 22:10:30,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 166. [2021-03-10 22:10:30,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 2.1333333333333333) internal successors, (352), 165 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:30,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 352 transitions. [2021-03-10 22:10:30,340 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 352 transitions. Word has length 19 [2021-03-10 22:10:30,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:30,341 INFO L480 AbstractCegarLoop]: Abstraction has 166 states and 352 transitions. [2021-03-10 22:10:30,341 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:30,341 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 352 transitions. [2021-03-10 22:10:30,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:10:30,341 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:30,341 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:30,541 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18594 [2021-03-10 22:10:30,541 INFO L428 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:30,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:30,541 INFO L82 PathProgramCache]: Analyzing trace with hash -545242040, now seen corresponding path program 312 times [2021-03-10 22:10:30,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:30,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086560727] [2021-03-10 22:10:30,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:30,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:30,650 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:30,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086560727] [2021-03-10 22:10:30,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933440404] [2021-03-10 22:10:30,650 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:30,732 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 22:10:30,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:30,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:10:30,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:31,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:10:31,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:10:31,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:10:31,055 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:31,060 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:10:31,061 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:31,205 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 48 [2021-03-10 22:10:31,205 INFO L628 ElimStorePlain]: treesize reduction 87, result has 48.2 percent of original size [2021-03-10 22:10:31,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:10:31,211 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:31,254 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:10:31,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:10:31,259 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:31,307 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:10:31,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:10:31,312 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:31,354 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:10:31,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:10:31,373 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:31,413 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:10:31,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:10:31,417 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:31,453 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:10:31,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:10:31,457 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:31,491 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:10:31,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:10:31,495 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:31,527 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:10:31,529 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:10:31,529 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:199, output treesize:13 [2021-03-10 22:10:31,570 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:31,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:31,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:10:31,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467507711] [2021-03-10 22:10:31,570 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:10:31,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:31,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:10:31,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:10:31,571 INFO L87 Difference]: Start difference. First operand 166 states and 352 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:31,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:31,879 INFO L93 Difference]: Finished difference Result 186 states and 391 transitions. [2021-03-10 22:10:31,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:10:31,880 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:10:31,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:31,880 INFO L225 Difference]: With dead ends: 186 [2021-03-10 22:10:31,880 INFO L226 Difference]: Without dead ends: 186 [2021-03-10 22:10:31,880 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 426.0ms TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:10:31,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-03-10 22:10:31,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 163. [2021-03-10 22:10:31,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 2.1358024691358026) internal successors, (346), 162 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:31,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 346 transitions. [2021-03-10 22:10:31,882 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 346 transitions. Word has length 19 [2021-03-10 22:10:31,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:31,882 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 346 transitions. [2021-03-10 22:10:31,882 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:31,882 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 346 transitions. [2021-03-10 22:10:31,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:10:31,882 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:31,882 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:32,083 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 313 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18641 [2021-03-10 22:10:32,083 INFO L428 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:32,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:32,083 INFO L82 PathProgramCache]: Analyzing trace with hash -155582671, now seen corresponding path program 313 times [2021-03-10 22:10:32,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:32,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326570892] [2021-03-10 22:10:32,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:32,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:32,185 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:32,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326570892] [2021-03-10 22:10:32,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699902363] [2021-03-10 22:10:32,186 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:32,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:32,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:10:32,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:32,453 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:32,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:32,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-10 22:10:32,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320973016] [2021-03-10 22:10:32,453 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:10:32,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:32,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:10:32,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:10:32,453 INFO L87 Difference]: Start difference. First operand 163 states and 346 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:32,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:32,767 INFO L93 Difference]: Finished difference Result 212 states and 443 transitions. [2021-03-10 22:10:32,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 22:10:32,767 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:10:32,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:32,768 INFO L225 Difference]: With dead ends: 212 [2021-03-10 22:10:32,768 INFO L226 Difference]: Without dead ends: 212 [2021-03-10 22:10:32,768 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 287.8ms TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:10:32,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-03-10 22:10:32,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 169. [2021-03-10 22:10:32,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 2.130952380952381) internal successors, (358), 168 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:32,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 358 transitions. [2021-03-10 22:10:32,769 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 358 transitions. Word has length 19 [2021-03-10 22:10:32,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:32,769 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 358 transitions. [2021-03-10 22:10:32,769 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:32,769 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 358 transitions. [2021-03-10 22:10:32,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:10:32,770 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:32,770 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:32,970 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18665 [2021-03-10 22:10:32,970 INFO L428 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:32,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:32,970 INFO L82 PathProgramCache]: Analyzing trace with hash -1170097149, now seen corresponding path program 314 times [2021-03-10 22:10:32,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:32,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110043656] [2021-03-10 22:10:32,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:32,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:33,077 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:33,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110043656] [2021-03-10 22:10:33,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23707858] [2021-03-10 22:10:33,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 22:10:33,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:10:33,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:33,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:10:33,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:33,500 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:33,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:33,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-10 22:10:33,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182603443] [2021-03-10 22:10:33,501 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:10:33,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:33,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:10:33,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:10:33,501 INFO L87 Difference]: Start difference. First operand 169 states and 358 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:33,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:33,820 INFO L93 Difference]: Finished difference Result 234 states and 488 transitions. [2021-03-10 22:10:33,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 22:10:33,821 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:10:33,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:33,821 INFO L225 Difference]: With dead ends: 234 [2021-03-10 22:10:33,821 INFO L226 Difference]: Without dead ends: 234 [2021-03-10 22:10:33,821 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 318.4ms TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:10:33,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-03-10 22:10:33,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 167. [2021-03-10 22:10:33,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.1325301204819276) internal successors, (354), 166 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:33,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 354 transitions. [2021-03-10 22:10:33,823 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 354 transitions. Word has length 19 [2021-03-10 22:10:33,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:33,823 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 354 transitions. [2021-03-10 22:10:33,823 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:33,823 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 354 transitions. [2021-03-10 22:10:33,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:10:33,823 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:33,823 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:34,023 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 315 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18686 [2021-03-10 22:10:34,024 INFO L428 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:34,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:34,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1116368561, now seen corresponding path program 315 times [2021-03-10 22:10:34,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:34,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131977275] [2021-03-10 22:10:34,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:34,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:34,129 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:34,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131977275] [2021-03-10 22:10:34,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376723623] [2021-03-10 22:10:34,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:34,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 22:10:34,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:34,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:10:34,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:34,427 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:34,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:34,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-10 22:10:34,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359991723] [2021-03-10 22:10:34,428 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:10:34,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:34,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:10:34,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:10:34,428 INFO L87 Difference]: Start difference. First operand 167 states and 354 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:34,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:34,762 INFO L93 Difference]: Finished difference Result 210 states and 433 transitions. [2021-03-10 22:10:34,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:10:34,762 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:10:34,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:34,763 INFO L225 Difference]: With dead ends: 210 [2021-03-10 22:10:34,763 INFO L226 Difference]: Without dead ends: 210 [2021-03-10 22:10:34,763 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 325.7ms TimeCoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:10:34,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-03-10 22:10:34,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 169. [2021-03-10 22:10:34,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 2.136904761904762) internal successors, (359), 168 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:34,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 359 transitions. [2021-03-10 22:10:34,764 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 359 transitions. Word has length 19 [2021-03-10 22:10:34,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:34,764 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 359 transitions. [2021-03-10 22:10:34,765 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:34,765 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 359 transitions. [2021-03-10 22:10:34,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:10:34,765 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:34,765 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:34,965 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18758,316 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:34,965 INFO L428 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:34,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:34,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1029689550, now seen corresponding path program 316 times [2021-03-10 22:10:34,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:34,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981962982] [2021-03-10 22:10:34,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:34,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:35,068 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:35,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981962982] [2021-03-10 22:10:35,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779895523] [2021-03-10 22:10:35,069 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:35,150 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:10:35,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:35,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:10:35,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:35,560 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:10:35,561 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:35,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:10:35,565 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:35,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:10:35,569 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:35,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:10:35,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:10:35,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:10:35,574 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:35,576 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:10:35,577 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:35,579 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:10:35,580 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:35,583 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:10:35,584 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:35,586 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:10:35,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:10:35,587 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:35,632 INFO L628 ElimStorePlain]: treesize reduction 25, result has 56.9 percent of original size [2021-03-10 22:10:35,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:10:35,635 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:35,667 INFO L628 ElimStorePlain]: treesize reduction 1, result has 96.6 percent of original size [2021-03-10 22:10:35,668 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:10:35,668 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 3 variables, input treesize:199, output treesize:12 [2021-03-10 22:10:35,698 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:35,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:35,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-10 22:10:35,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203057093] [2021-03-10 22:10:35,698 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:10:35,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:35,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:10:35,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:10:35,699 INFO L87 Difference]: Start difference. First operand 169 states and 359 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:36,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:36,239 INFO L93 Difference]: Finished difference Result 251 states and 514 transitions. [2021-03-10 22:10:36,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 22:10:36,239 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:10:36,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:36,240 INFO L225 Difference]: With dead ends: 251 [2021-03-10 22:10:36,240 INFO L226 Difference]: Without dead ends: 251 [2021-03-10 22:10:36,240 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 522.0ms TimeCoverageRelationStatistics Valid=164, Invalid=766, Unknown=0, NotChecked=0, Total=930 [2021-03-10 22:10:36,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-03-10 22:10:36,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 168. [2021-03-10 22:10:36,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.155688622754491) internal successors, (360), 167 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:36,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 360 transitions. [2021-03-10 22:10:36,241 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 360 transitions. Word has length 19 [2021-03-10 22:10:36,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:36,242 INFO L480 AbstractCegarLoop]: Abstraction has 168 states and 360 transitions. [2021-03-10 22:10:36,242 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:36,242 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 360 transitions. [2021-03-10 22:10:36,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:10:36,242 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:36,242 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:36,442 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 317 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18788 [2021-03-10 22:10:36,442 INFO L428 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:36,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:36,442 INFO L82 PathProgramCache]: Analyzing trace with hash -1564919352, now seen corresponding path program 317 times [2021-03-10 22:10:36,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:36,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183554375] [2021-03-10 22:10:36,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:36,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:36,547 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:36,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183554375] [2021-03-10 22:10:36,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764073164] [2021-03-10 22:10:36,548 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 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 [2021-03-10 22:10:36,630 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 22:10:36,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:36,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:10:36,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:36,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:10:36,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:10:36,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:10:36,855 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:36,857 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:10:36,858 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:36,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:10:36,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:10:36,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:10:36,862 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:36,864 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:10:36,865 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:36,879 INFO L628 ElimStorePlain]: treesize reduction 4, result has 81.8 percent of original size [2021-03-10 22:10:36,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:10:36,882 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:36,888 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:10:36,889 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:10:36,889 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:114, output treesize:6 [2021-03-10 22:10:36,898 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:36,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:36,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-10 22:10:36,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672949901] [2021-03-10 22:10:36,898 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:10:36,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:36,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:10:36,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:10:36,899 INFO L87 Difference]: Start difference. First operand 168 states and 360 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:37,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:37,230 INFO L93 Difference]: Finished difference Result 204 states and 428 transitions. [2021-03-10 22:10:37,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:10:37,231 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:10:37,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:37,231 INFO L225 Difference]: With dead ends: 204 [2021-03-10 22:10:37,231 INFO L226 Difference]: Without dead ends: 204 [2021-03-10 22:10:37,231 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 310.6ms TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:10:37,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-03-10 22:10:37,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 166. [2021-03-10 22:10:37,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 2.139393939393939) internal successors, (353), 165 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:37,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 353 transitions. [2021-03-10 22:10:37,233 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 353 transitions. Word has length 19 [2021-03-10 22:10:37,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:37,233 INFO L480 AbstractCegarLoop]: Abstraction has 166 states and 353 transitions. [2021-03-10 22:10:37,233 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:37,233 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 353 transitions. [2021-03-10 22:10:37,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:10:37,233 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:37,233 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:37,433 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18904,318 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:37,433 INFO L428 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:37,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:37,434 INFO L82 PathProgramCache]: Analyzing trace with hash -1929639887, now seen corresponding path program 318 times [2021-03-10 22:10:37,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:37,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984081581] [2021-03-10 22:10:37,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:37,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:37,532 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:37,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984081581] [2021-03-10 22:10:37,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732116811] [2021-03-10 22:10:37,532 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:37,622 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 22:10:37,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:37,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:10:37,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:37,819 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:37,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:37,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-10 22:10:37,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836051198] [2021-03-10 22:10:37,819 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:10:37,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:37,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:10:37,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:10:37,820 INFO L87 Difference]: Start difference. First operand 166 states and 353 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:38,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:38,091 INFO L93 Difference]: Finished difference Result 180 states and 376 transitions. [2021-03-10 22:10:38,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:10:38,092 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:10:38,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:38,092 INFO L225 Difference]: With dead ends: 180 [2021-03-10 22:10:38,092 INFO L226 Difference]: Without dead ends: 176 [2021-03-10 22:10:38,092 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 338.9ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:10:38,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-03-10 22:10:38,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 164. [2021-03-10 22:10:38,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.1349693251533743) internal successors, (348), 163 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:38,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 348 transitions. [2021-03-10 22:10:38,094 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 348 transitions. Word has length 19 [2021-03-10 22:10:38,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:38,094 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 348 transitions. [2021-03-10 22:10:38,094 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:38,094 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 348 transitions. [2021-03-10 22:10:38,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:10:38,094 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:38,094 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:38,308 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18943 [2021-03-10 22:10:38,309 INFO L428 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:38,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:38,309 INFO L82 PathProgramCache]: Analyzing trace with hash -2138362937, now seen corresponding path program 319 times [2021-03-10 22:10:38,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:38,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915082942] [2021-03-10 22:10:38,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:38,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:38,423 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:38,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915082942] [2021-03-10 22:10:38,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457547445] [2021-03-10 22:10:38,423 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 22:10:38,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:38,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:10:38,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:38,785 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:38,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:38,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-10 22:10:38,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685054111] [2021-03-10 22:10:38,785 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:10:38,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:38,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:10:38,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:10:38,786 INFO L87 Difference]: Start difference. First operand 164 states and 348 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:39,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:39,111 INFO L93 Difference]: Finished difference Result 215 states and 446 transitions. [2021-03-10 22:10:39,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 22:10:39,112 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:10:39,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:39,112 INFO L225 Difference]: With dead ends: 215 [2021-03-10 22:10:39,112 INFO L226 Difference]: Without dead ends: 215 [2021-03-10 22:10:39,112 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 388.2ms TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:10:39,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-03-10 22:10:39,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 164. [2021-03-10 22:10:39,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.1349693251533743) internal successors, (348), 163 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:39,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 348 transitions. [2021-03-10 22:10:39,113 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 348 transitions. Word has length 19 [2021-03-10 22:10:39,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:39,114 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 348 transitions. [2021-03-10 22:10:39,114 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:39,114 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 348 transitions. [2021-03-10 22:10:39,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:10:39,114 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:39,114 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:39,314 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 320 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18961 [2021-03-10 22:10:39,314 INFO L428 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:39,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:39,315 INFO L82 PathProgramCache]: Analyzing trace with hash 10546248, now seen corresponding path program 320 times [2021-03-10 22:10:39,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:39,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626392435] [2021-03-10 22:10:39,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:39,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:39,427 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:39,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626392435] [2021-03-10 22:10:39,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085338026] [2021-03-10 22:10:39,427 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:39,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:10:39,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:39,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:10:39,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:39,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:10:39,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:10:39,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:10:39,830 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:39,833 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:10:39,834 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:39,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:10:39,838 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:39,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:10:39,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:10:39,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:10:39,842 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:39,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:10:39,846 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:39,848 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:10:39,849 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:39,852 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:10:39,852 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:39,854 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:10:39,855 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:39,928 INFO L628 ElimStorePlain]: treesize reduction 25, result has 56.9 percent of original size [2021-03-10 22:10:39,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:10:39,931 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:39,963 INFO L628 ElimStorePlain]: treesize reduction 1, result has 96.6 percent of original size [2021-03-10 22:10:39,964 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:10:39,964 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 3 variables, input treesize:199, output treesize:12 [2021-03-10 22:10:39,994 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:39,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:39,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-10 22:10:39,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219443636] [2021-03-10 22:10:39,995 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:10:39,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:39,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:10:39,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:10:39,995 INFO L87 Difference]: Start difference. First operand 164 states and 348 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:40,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:40,717 INFO L93 Difference]: Finished difference Result 253 states and 515 transitions. [2021-03-10 22:10:40,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 22:10:40,718 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:10:40,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:40,718 INFO L225 Difference]: With dead ends: 253 [2021-03-10 22:10:40,718 INFO L226 Difference]: Without dead ends: 253 [2021-03-10 22:10:40,718 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 655.7ms TimeCoverageRelationStatistics Valid=161, Invalid=769, Unknown=0, NotChecked=0, Total=930 [2021-03-10 22:10:40,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-03-10 22:10:40,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 169. [2021-03-10 22:10:40,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 2.1666666666666665) internal successors, (364), 168 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:40,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 364 transitions. [2021-03-10 22:10:40,720 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 364 transitions. Word has length 19 [2021-03-10 22:10:40,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:40,720 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 364 transitions. [2021-03-10 22:10:40,720 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:40,720 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 364 transitions. [2021-03-10 22:10:40,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:10:40,720 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:40,720 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:40,921 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18999,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:40,921 INFO L428 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:40,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:40,921 INFO L82 PathProgramCache]: Analyzing trace with hash -524683554, now seen corresponding path program 321 times [2021-03-10 22:10:40,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:40,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025928603] [2021-03-10 22:10:40,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:40,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:41,019 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:41,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025928603] [2021-03-10 22:10:41,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539753178] [2021-03-10 22:10:41,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:41,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 22:10:41,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:41,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:10:41,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:41,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:10:41,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:10:41,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:10:41,322 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:41,324 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:10:41,325 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:41,327 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:10:41,328 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:41,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:10:41,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:10:41,331 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:41,346 INFO L628 ElimStorePlain]: treesize reduction 4, result has 81.8 percent of original size [2021-03-10 22:10:41,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:10:41,349 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:41,354 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:10:41,355 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:10:41,355 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:114, output treesize:6 [2021-03-10 22:10:41,365 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:41,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:41,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-10 22:10:41,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107936659] [2021-03-10 22:10:41,365 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:10:41,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:41,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:10:41,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:10:41,365 INFO L87 Difference]: Start difference. First operand 169 states and 364 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:41,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:41,859 INFO L93 Difference]: Finished difference Result 210 states and 439 transitions. [2021-03-10 22:10:41,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:10:41,860 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:10:41,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:41,860 INFO L225 Difference]: With dead ends: 210 [2021-03-10 22:10:41,860 INFO L226 Difference]: Without dead ends: 210 [2021-03-10 22:10:41,860 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 422.0ms TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:10:41,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-03-10 22:10:41,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 169. [2021-03-10 22:10:41,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 2.1666666666666665) internal successors, (364), 168 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:41,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 364 transitions. [2021-03-10 22:10:41,862 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 364 transitions. Word has length 19 [2021-03-10 22:10:41,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:41,862 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 364 transitions. [2021-03-10 22:10:41,862 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:41,862 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 364 transitions. [2021-03-10 22:10:41,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:10:41,862 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:41,862 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:42,062 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19080 [2021-03-10 22:10:42,063 INFO L428 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:42,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:42,063 INFO L82 PathProgramCache]: Analyzing trace with hash -889404089, now seen corresponding path program 322 times [2021-03-10 22:10:42,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:42,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176810736] [2021-03-10 22:10:42,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:42,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:42,163 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:42,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176810736] [2021-03-10 22:10:42,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271975977] [2021-03-10 22:10:42,163 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 22:10:42,245 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:10:42,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:42,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:10:42,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:42,471 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:42,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:42,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-10 22:10:42,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767318035] [2021-03-10 22:10:42,471 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:10:42,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:42,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:10:42,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:10:42,472 INFO L87 Difference]: Start difference. First operand 169 states and 364 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:42,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:42,875 INFO L93 Difference]: Finished difference Result 192 states and 403 transitions. [2021-03-10 22:10:42,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:10:42,875 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:10:42,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:42,876 INFO L225 Difference]: With dead ends: 192 [2021-03-10 22:10:42,876 INFO L226 Difference]: Without dead ends: 188 [2021-03-10 22:10:42,876 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 465.3ms TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:10:42,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-03-10 22:10:42,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 168. [2021-03-10 22:10:42,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.161676646706587) internal successors, (361), 167 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:42,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 361 transitions. [2021-03-10 22:10:42,877 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 361 transitions. Word has length 19 [2021-03-10 22:10:42,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:42,877 INFO L480 AbstractCegarLoop]: Abstraction has 168 states and 361 transitions. [2021-03-10 22:10:42,877 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:42,877 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 361 transitions. [2021-03-10 22:10:42,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:10:42,878 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:42,878 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:43,078 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 323 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19116 [2021-03-10 22:10:43,078 INFO L428 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:43,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:43,078 INFO L82 PathProgramCache]: Analyzing trace with hash 63061768, now seen corresponding path program 323 times [2021-03-10 22:10:43,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:43,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331085347] [2021-03-10 22:10:43,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:43,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:43,174 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:43,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331085347] [2021-03-10 22:10:43,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625075312] [2021-03-10 22:10:43,175 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:43,258 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 22:10:43,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:43,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:10:43,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:43,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:10:43,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:10:43,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:10:43,437 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:43,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:10:43,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:10:43,441 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:43,463 INFO L628 ElimStorePlain]: treesize reduction 25, result has 41.9 percent of original size [2021-03-10 22:10:43,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:10:43,467 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:43,472 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:10:43,473 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:10:43,473 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:71, output treesize:6 [2021-03-10 22:10:43,483 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:43,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:43,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-10 22:10:43,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830987208] [2021-03-10 22:10:43,483 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:10:43,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:43,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:10:43,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:10:43,483 INFO L87 Difference]: Start difference. First operand 168 states and 361 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:43,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:43,758 INFO L93 Difference]: Finished difference Result 204 states and 429 transitions. [2021-03-10 22:10:43,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:10:43,758 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:10:43,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:43,759 INFO L225 Difference]: With dead ends: 204 [2021-03-10 22:10:43,759 INFO L226 Difference]: Without dead ends: 204 [2021-03-10 22:10:43,759 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 289.1ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:10:43,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-03-10 22:10:43,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 170. [2021-03-10 22:10:43,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.165680473372781) internal successors, (366), 169 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:43,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 366 transitions. [2021-03-10 22:10:43,760 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 366 transitions. Word has length 19 [2021-03-10 22:10:43,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:43,760 INFO L480 AbstractCegarLoop]: Abstraction has 170 states and 366 transitions. [2021-03-10 22:10:43,760 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:43,760 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 366 transitions. [2021-03-10 22:10:43,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:10:43,761 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:43,761 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:43,961 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19133 [2021-03-10 22:10:43,961 INFO L428 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:43,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:43,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1902096621, now seen corresponding path program 324 times [2021-03-10 22:10:43,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:43,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777632811] [2021-03-10 22:10:43,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:43,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:44,051 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:44,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777632811] [2021-03-10 22:10:44,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219854358] [2021-03-10 22:10:44,051 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:44,139 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 22:10:44,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:44,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:10:44,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:44,378 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:44,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:44,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-10 22:10:44,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668825720] [2021-03-10 22:10:44,378 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:10:44,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:44,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:10:44,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:10:44,378 INFO L87 Difference]: Start difference. First operand 170 states and 366 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:44,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:44,657 INFO L93 Difference]: Finished difference Result 187 states and 395 transitions. [2021-03-10 22:10:44,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:10:44,658 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:10:44,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:44,658 INFO L225 Difference]: With dead ends: 187 [2021-03-10 22:10:44,658 INFO L226 Difference]: Without dead ends: 181 [2021-03-10 22:10:44,658 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 314.4ms TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:10:44,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-03-10 22:10:44,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 170. [2021-03-10 22:10:44,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.1538461538461537) internal successors, (364), 169 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:44,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 364 transitions. [2021-03-10 22:10:44,660 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 364 transitions. Word has length 19 [2021-03-10 22:10:44,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:44,660 INFO L480 AbstractCegarLoop]: Abstraction has 170 states and 364 transitions. [2021-03-10 22:10:44,660 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:44,660 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 364 transitions. [2021-03-10 22:10:44,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:10:44,660 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:44,660 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:44,860 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19156,325 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:44,860 INFO L428 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:44,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:44,861 INFO L82 PathProgramCache]: Analyzing trace with hash 870143391, now seen corresponding path program 325 times [2021-03-10 22:10:44,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:44,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351480215] [2021-03-10 22:10:44,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:44,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:44,964 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:44,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351480215] [2021-03-10 22:10:44,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550949898] [2021-03-10 22:10:44,964 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:45,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:45,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:10:45,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:45,283 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:45,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:45,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:10:45,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394361513] [2021-03-10 22:10:45,284 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:10:45,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:45,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:10:45,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:10:45,284 INFO L87 Difference]: Start difference. First operand 170 states and 364 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:45,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:45,578 INFO L93 Difference]: Finished difference Result 193 states and 410 transitions. [2021-03-10 22:10:45,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:10:45,579 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:10:45,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:45,579 INFO L225 Difference]: With dead ends: 193 [2021-03-10 22:10:45,579 INFO L226 Difference]: Without dead ends: 193 [2021-03-10 22:10:45,579 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 322.6ms TimeCoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:10:45,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-03-10 22:10:45,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 170. [2021-03-10 22:10:45,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.1538461538461537) internal successors, (364), 169 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:45,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 364 transitions. [2021-03-10 22:10:45,581 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 364 transitions. Word has length 19 [2021-03-10 22:10:45,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:45,581 INFO L480 AbstractCegarLoop]: Abstraction has 170 states and 364 transitions. [2021-03-10 22:10:45,581 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:45,581 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 364 transitions. [2021-03-10 22:10:45,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:10:45,581 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:45,581 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:45,781 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19183 [2021-03-10 22:10:45,781 INFO L428 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:45,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:45,782 INFO L82 PathProgramCache]: Analyzing trace with hash 879306225, now seen corresponding path program 326 times [2021-03-10 22:10:45,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:45,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148797303] [2021-03-10 22:10:45,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:45,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:45,894 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:45,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148797303] [2021-03-10 22:10:45,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223551494] [2021-03-10 22:10:45,894 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:45,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:10:45,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:45,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:10:45,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:46,221 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:46,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:46,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:10:46,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306821365] [2021-03-10 22:10:46,221 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:10:46,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:46,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:10:46,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:10:46,221 INFO L87 Difference]: Start difference. First operand 170 states and 364 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:46,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:46,627 INFO L93 Difference]: Finished difference Result 213 states and 450 transitions. [2021-03-10 22:10:46,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:10:46,627 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:10:46,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:46,628 INFO L225 Difference]: With dead ends: 213 [2021-03-10 22:10:46,628 INFO L226 Difference]: Without dead ends: 213 [2021-03-10 22:10:46,628 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 435.5ms TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:10:46,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-03-10 22:10:46,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 170. [2021-03-10 22:10:46,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.1538461538461537) internal successors, (364), 169 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:46,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 364 transitions. [2021-03-10 22:10:46,629 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 364 transitions. Word has length 19 [2021-03-10 22:10:46,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:46,630 INFO L480 AbstractCegarLoop]: Abstraction has 170 states and 364 transitions. [2021-03-10 22:10:46,630 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:46,630 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 364 transitions. [2021-03-10 22:10:46,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:10:46,630 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:46,630 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:46,830 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 327 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19205 [2021-03-10 22:10:46,830 INFO L428 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:46,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:46,831 INFO L82 PathProgramCache]: Analyzing trace with hash -505871521, now seen corresponding path program 327 times [2021-03-10 22:10:46,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:46,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370868870] [2021-03-10 22:10:46,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:46,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:46,952 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:46,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370868870] [2021-03-10 22:10:46,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292643226] [2021-03-10 22:10:46,952 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:47,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 22:10:47,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:47,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:10:47,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:47,307 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:47,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:47,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:10:47,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733667817] [2021-03-10 22:10:47,307 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:10:47,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:47,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:10:47,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:10:47,307 INFO L87 Difference]: Start difference. First operand 170 states and 364 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:47,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:47,940 INFO L93 Difference]: Finished difference Result 223 states and 470 transitions. [2021-03-10 22:10:47,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:10:47,940 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:10:47,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:47,941 INFO L225 Difference]: With dead ends: 223 [2021-03-10 22:10:47,941 INFO L226 Difference]: Without dead ends: 223 [2021-03-10 22:10:47,941 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 599.2ms TimeCoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2021-03-10 22:10:47,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-03-10 22:10:47,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 170. [2021-03-10 22:10:47,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.1538461538461537) internal successors, (364), 169 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:47,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 364 transitions. [2021-03-10 22:10:47,943 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 364 transitions. Word has length 19 [2021-03-10 22:10:47,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:47,943 INFO L480 AbstractCegarLoop]: Abstraction has 170 states and 364 transitions. [2021-03-10 22:10:47,943 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:47,943 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 364 transitions. [2021-03-10 22:10:47,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:10:47,943 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:47,943 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:48,143 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19223,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:48,143 INFO L428 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:48,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:48,144 INFO L82 PathProgramCache]: Analyzing trace with hash 484484022, now seen corresponding path program 328 times [2021-03-10 22:10:48,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:48,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461996005] [2021-03-10 22:10:48,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:48,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:48,248 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:48,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461996005] [2021-03-10 22:10:48,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566204768] [2021-03-10 22:10:48,248 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:48,332 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:10:48,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:48,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:10:48,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:48,731 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:48,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:48,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:10:48,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743122939] [2021-03-10 22:10:48,731 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:10:48,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:48,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:10:48,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:10:48,731 INFO L87 Difference]: Start difference. First operand 170 states and 364 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:49,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:49,141 INFO L93 Difference]: Finished difference Result 197 states and 413 transitions. [2021-03-10 22:10:49,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:10:49,141 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:10:49,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:49,141 INFO L225 Difference]: With dead ends: 197 [2021-03-10 22:10:49,141 INFO L226 Difference]: Without dead ends: 191 [2021-03-10 22:10:49,141 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 548.8ms TimeCoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:10:49,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-03-10 22:10:49,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 170. [2021-03-10 22:10:49,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.1479289940828403) internal successors, (363), 169 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:49,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 363 transitions. [2021-03-10 22:10:49,143 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 363 transitions. Word has length 19 [2021-03-10 22:10:49,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:49,143 INFO L480 AbstractCegarLoop]: Abstraction has 170 states and 363 transitions. [2021-03-10 22:10:49,143 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:49,143 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 363 transitions. [2021-03-10 22:10:49,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:10:49,143 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:49,143 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:49,344 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19247 [2021-03-10 22:10:49,344 INFO L428 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:49,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:49,344 INFO L82 PathProgramCache]: Analyzing trace with hash 178334389, now seen corresponding path program 329 times [2021-03-10 22:10:49,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:49,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83532881] [2021-03-10 22:10:49,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:49,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:49,454 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:49,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83532881] [2021-03-10 22:10:49,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711630698] [2021-03-10 22:10:49,454 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:49,539 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 22:10:49,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:49,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:10:49,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:49,883 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:49,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:49,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:10:49,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579162939] [2021-03-10 22:10:49,883 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:10:49,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:49,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:10:49,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:10:49,884 INFO L87 Difference]: Start difference. First operand 170 states and 363 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:50,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:50,535 INFO L93 Difference]: Finished difference Result 228 states and 480 transitions. [2021-03-10 22:10:50,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:10:50,536 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:10:50,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:50,536 INFO L225 Difference]: With dead ends: 228 [2021-03-10 22:10:50,536 INFO L226 Difference]: Without dead ends: 228 [2021-03-10 22:10:50,536 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 643.0ms TimeCoverageRelationStatistics Valid=138, Invalid=674, Unknown=0, NotChecked=0, Total=812 [2021-03-10 22:10:50,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-03-10 22:10:50,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 166. [2021-03-10 22:10:50,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 2.1515151515151514) internal successors, (355), 165 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:50,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 355 transitions. [2021-03-10 22:10:50,538 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 355 transitions. Word has length 19 [2021-03-10 22:10:50,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:50,538 INFO L480 AbstractCegarLoop]: Abstraction has 166 states and 355 transitions. [2021-03-10 22:10:50,538 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:50,538 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 355 transitions. [2021-03-10 22:10:50,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:10:50,538 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:50,539 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:50,739 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 330 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19267 [2021-03-10 22:10:50,739 INFO L428 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:50,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:50,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1233122405, now seen corresponding path program 330 times [2021-03-10 22:10:50,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:50,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396667233] [2021-03-10 22:10:50,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:50,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:50,842 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:50,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396667233] [2021-03-10 22:10:50,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937434130] [2021-03-10 22:10:50,843 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:50,933 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:10:50,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:50,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:10:50,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:51,156 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:51,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:51,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:10:51,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900043535] [2021-03-10 22:10:51,157 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:10:51,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:51,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:10:51,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:10:51,157 INFO L87 Difference]: Start difference. First operand 166 states and 355 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:51,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:51,430 INFO L93 Difference]: Finished difference Result 201 states and 425 transitions. [2021-03-10 22:10:51,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:10:51,431 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:10:51,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:51,431 INFO L225 Difference]: With dead ends: 201 [2021-03-10 22:10:51,432 INFO L226 Difference]: Without dead ends: 201 [2021-03-10 22:10:51,432 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 305.3ms TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:10:51,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-03-10 22:10:51,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 167. [2021-03-10 22:10:51,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.1506024096385543) internal successors, (357), 166 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:51,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 357 transitions. [2021-03-10 22:10:51,433 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 357 transitions. Word has length 19 [2021-03-10 22:10:51,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:51,433 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 357 transitions. [2021-03-10 22:10:51,433 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:51,433 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 357 transitions. [2021-03-10 22:10:51,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:10:51,433 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:51,433 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:51,634 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19307,331 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:51,634 INFO L428 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:51,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:51,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1676667145, now seen corresponding path program 331 times [2021-03-10 22:10:51,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:51,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063144652] [2021-03-10 22:10:51,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:51,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:51,739 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:51,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063144652] [2021-03-10 22:10:51,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051878650] [2021-03-10 22:10:51,739 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:51,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:51,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:10:51,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:52,058 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:52,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:52,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:10:52,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667698217] [2021-03-10 22:10:52,058 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:10:52,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:52,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:10:52,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:10:52,059 INFO L87 Difference]: Start difference. First operand 167 states and 357 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:52,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:52,544 INFO L93 Difference]: Finished difference Result 217 states and 457 transitions. [2021-03-10 22:10:52,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:10:52,545 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:10:52,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:52,545 INFO L225 Difference]: With dead ends: 217 [2021-03-10 22:10:52,545 INFO L226 Difference]: Without dead ends: 217 [2021-03-10 22:10:52,545 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 513.4ms TimeCoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2021-03-10 22:10:52,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-03-10 22:10:52,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 168. [2021-03-10 22:10:52,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.1497005988023954) internal successors, (359), 167 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:52,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 359 transitions. [2021-03-10 22:10:52,547 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 359 transitions. Word has length 19 [2021-03-10 22:10:52,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:52,547 INFO L480 AbstractCegarLoop]: Abstraction has 168 states and 359 transitions. [2021-03-10 22:10:52,547 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:52,547 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 359 transitions. [2021-03-10 22:10:52,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:10:52,547 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:52,547 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:52,748 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 332 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19324 [2021-03-10 22:10:52,748 INFO L428 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:52,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:52,748 INFO L82 PathProgramCache]: Analyzing trace with hash 662152667, now seen corresponding path program 332 times [2021-03-10 22:10:52,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:52,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577746585] [2021-03-10 22:10:52,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:52,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:52,852 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:52,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577746585] [2021-03-10 22:10:52,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37638189] [2021-03-10 22:10:52,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:52,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:10:52,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:52,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:10:52,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:53,229 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:53,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:53,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:10:53,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936222920] [2021-03-10 22:10:53,229 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:10:53,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:53,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:10:53,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:10:53,230 INFO L87 Difference]: Start difference. First operand 168 states and 359 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:53,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:53,803 INFO L93 Difference]: Finished difference Result 227 states and 477 transitions. [2021-03-10 22:10:53,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:10:53,804 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:10:53,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:53,804 INFO L225 Difference]: With dead ends: 227 [2021-03-10 22:10:53,804 INFO L226 Difference]: Without dead ends: 227 [2021-03-10 22:10:53,804 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 574.3ms TimeCoverageRelationStatistics Valid=138, Invalid=674, Unknown=0, NotChecked=0, Total=812 [2021-03-10 22:10:53,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-03-10 22:10:53,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 167. [2021-03-10 22:10:53,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.1506024096385543) internal successors, (357), 166 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:53,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 357 transitions. [2021-03-10 22:10:53,806 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 357 transitions. Word has length 19 [2021-03-10 22:10:53,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:53,806 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 357 transitions. [2021-03-10 22:10:53,806 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:53,806 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 357 transitions. [2021-03-10 22:10:53,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:10:53,806 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:53,806 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:54,006 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19343 [2021-03-10 22:10:54,006 INFO L428 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:54,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:54,007 INFO L82 PathProgramCache]: Analyzing trace with hash 214814944, now seen corresponding path program 333 times [2021-03-10 22:10:54,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:54,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555837145] [2021-03-10 22:10:54,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:54,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:54,110 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:54,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555837145] [2021-03-10 22:10:54,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021651003] [2021-03-10 22:10:54,111 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:54,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:10:54,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:54,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:10:54,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:54,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:10:54,493 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:54,496 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:10:54,497 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:54,614 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2021-03-10 22:10:54,614 INFO L628 ElimStorePlain]: treesize reduction 87, result has 48.5 percent of original size [2021-03-10 22:10:54,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:10:54,619 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:54,661 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:10:54,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:10:54,666 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:54,706 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:10:54,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:10:54,711 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:54,749 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:10:54,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:10:54,754 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:54,791 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:10:54,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:10:54,795 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:54,830 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:10:54,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:10:54,834 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:54,868 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:10:54,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:10:54,872 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:54,904 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:10:54,905 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:10:54,905 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:199, output treesize:13 [2021-03-10 22:10:54,947 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:54,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:54,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:10:54,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990454668] [2021-03-10 22:10:54,947 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:10:54,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:54,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:10:54,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:10:54,948 INFO L87 Difference]: Start difference. First operand 167 states and 357 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:55,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:55,180 INFO L93 Difference]: Finished difference Result 180 states and 383 transitions. [2021-03-10 22:10:55,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:10:55,181 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:10:55,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:55,181 INFO L225 Difference]: With dead ends: 180 [2021-03-10 22:10:55,181 INFO L226 Difference]: Without dead ends: 180 [2021-03-10 22:10:55,181 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 392.3ms TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:10:55,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-03-10 22:10:55,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 164. [2021-03-10 22:10:55,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.1533742331288344) internal successors, (351), 163 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:55,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 351 transitions. [2021-03-10 22:10:55,183 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 351 transitions. Word has length 19 [2021-03-10 22:10:55,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:55,183 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 351 transitions. [2021-03-10 22:10:55,183 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:55,183 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 351 transitions. [2021-03-10 22:10:55,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:10:55,183 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:55,183 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:55,383 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19376,334 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:55,384 INFO L428 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:55,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:55,384 INFO L82 PathProgramCache]: Analyzing trace with hash -1918155978, now seen corresponding path program 334 times [2021-03-10 22:10:55,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:55,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27778042] [2021-03-10 22:10:55,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:55,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:55,489 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:55,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27778042] [2021-03-10 22:10:55,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945860031] [2021-03-10 22:10:55,489 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 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 [2021-03-10 22:10:55,572 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:10:55,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:55,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:10:55,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:55,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:10:55,807 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:55,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:10:55,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:10:55,812 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:55,891 INFO L628 ElimStorePlain]: treesize reduction 63, result has 45.7 percent of original size [2021-03-10 22:10:55,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:10:55,895 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:55,922 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:10:55,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:10:55,926 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:55,952 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:10:55,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:10:55,955 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:55,980 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:10:55,981 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:10:55,981 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 7 variables, input treesize:128, output treesize:13 [2021-03-10 22:10:56,021 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:56,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:56,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:10:56,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069548305] [2021-03-10 22:10:56,022 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:10:56,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:56,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:10:56,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:10:56,022 INFO L87 Difference]: Start difference. First operand 164 states and 351 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:56,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:56,284 INFO L93 Difference]: Finished difference Result 182 states and 388 transitions. [2021-03-10 22:10:56,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:10:56,285 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:10:56,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:56,285 INFO L225 Difference]: With dead ends: 182 [2021-03-10 22:10:56,285 INFO L226 Difference]: Without dead ends: 182 [2021-03-10 22:10:56,285 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 345.3ms TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:10:56,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-03-10 22:10:56,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 162. [2021-03-10 22:10:56,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 2.1552795031055902) internal successors, (347), 161 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:56,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 347 transitions. [2021-03-10 22:10:56,286 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 347 transitions. Word has length 19 [2021-03-10 22:10:56,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:56,287 INFO L480 AbstractCegarLoop]: Abstraction has 162 states and 347 transitions. [2021-03-10 22:10:56,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:56,287 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 347 transitions. [2021-03-10 22:10:56,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:10:56,287 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:56,287 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:56,487 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 335 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19396 [2021-03-10 22:10:56,487 INFO L428 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:56,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:56,487 INFO L82 PathProgramCache]: Analyzing trace with hash -237659338, now seen corresponding path program 335 times [2021-03-10 22:10:56,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:56,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473309528] [2021-03-10 22:10:56,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:56,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:56,587 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:56,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473309528] [2021-03-10 22:10:56,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814606208] [2021-03-10 22:10:56,587 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:56,672 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 22:10:56,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:56,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:10:56,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:56,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:10:56,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:10:56,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:10:56,883 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:56,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:10:56,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:10:56,887 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:56,911 INFO L628 ElimStorePlain]: treesize reduction 25, result has 41.9 percent of original size [2021-03-10 22:10:56,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:10:56,914 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:10:56,920 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:10:56,921 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:10:56,921 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:71, output treesize:6 [2021-03-10 22:10:56,930 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:56,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:56,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:10:56,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248979660] [2021-03-10 22:10:56,930 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:10:56,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:56,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:10:56,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:10:56,931 INFO L87 Difference]: Start difference. First operand 162 states and 347 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:57,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:57,203 INFO L93 Difference]: Finished difference Result 193 states and 402 transitions. [2021-03-10 22:10:57,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:10:57,204 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:10:57,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:57,204 INFO L225 Difference]: With dead ends: 193 [2021-03-10 22:10:57,204 INFO L226 Difference]: Without dead ends: 193 [2021-03-10 22:10:57,204 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 297.5ms TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:10:57,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-03-10 22:10:57,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 157. [2021-03-10 22:10:57,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.1346153846153846) internal successors, (333), 156 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:57,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 333 transitions. [2021-03-10 22:10:57,205 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 333 transitions. Word has length 19 [2021-03-10 22:10:57,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:57,206 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 333 transitions. [2021-03-10 22:10:57,206 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:57,206 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 333 transitions. [2021-03-10 22:10:57,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:10:57,206 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:57,206 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:57,414 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19417,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:57,414 INFO L428 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:57,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:57,414 INFO L82 PathProgramCache]: Analyzing trace with hash -818282917, now seen corresponding path program 336 times [2021-03-10 22:10:57,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:57,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396669770] [2021-03-10 22:10:57,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:57,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:57,516 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:57,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396669770] [2021-03-10 22:10:57,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86735323] [2021-03-10 22:10:57,516 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 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 [2021-03-10 22:10:57,605 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 22:10:57,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:57,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:10:57,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:57,859 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:57,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:57,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:10:57,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092036864] [2021-03-10 22:10:57,860 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:10:57,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:57,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:10:57,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:10:57,860 INFO L87 Difference]: Start difference. First operand 157 states and 333 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:58,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:58,197 INFO L93 Difference]: Finished difference Result 193 states and 405 transitions. [2021-03-10 22:10:58,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:10:58,198 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:10:58,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:58,198 INFO L225 Difference]: With dead ends: 193 [2021-03-10 22:10:58,198 INFO L226 Difference]: Without dead ends: 193 [2021-03-10 22:10:58,198 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 287.6ms TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:10:58,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-03-10 22:10:58,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 158. [2021-03-10 22:10:58,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.1337579617834397) internal successors, (335), 157 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:58,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 335 transitions. [2021-03-10 22:10:58,200 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 335 transitions. Word has length 19 [2021-03-10 22:10:58,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:58,200 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 335 transitions. [2021-03-10 22:10:58,200 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:58,200 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 335 transitions. [2021-03-10 22:10:58,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:10:58,200 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:58,200 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:58,400 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19440,337 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:58,400 INFO L428 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:58,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:58,401 INFO L82 PathProgramCache]: Analyzing trace with hash 2091506633, now seen corresponding path program 337 times [2021-03-10 22:10:58,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:58,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53718553] [2021-03-10 22:10:58,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:58,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:58,502 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:58,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53718553] [2021-03-10 22:10:58,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094610639] [2021-03-10 22:10:58,502 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:58,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:58,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:10:58,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:58,805 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:58,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:58,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:10:58,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679289271] [2021-03-10 22:10:58,805 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:10:58,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:58,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:10:58,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:10:58,806 INFO L87 Difference]: Start difference. First operand 158 states and 335 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:59,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:10:59,221 INFO L93 Difference]: Finished difference Result 212 states and 443 transitions. [2021-03-10 22:10:59,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:10:59,221 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:10:59,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:10:59,222 INFO L225 Difference]: With dead ends: 212 [2021-03-10 22:10:59,222 INFO L226 Difference]: Without dead ends: 212 [2021-03-10 22:10:59,222 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 455.8ms TimeCoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2021-03-10 22:10:59,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-03-10 22:10:59,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 159. [2021-03-10 22:10:59,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.132911392405063) internal successors, (337), 158 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:59,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 337 transitions. [2021-03-10 22:10:59,223 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 337 transitions. Word has length 19 [2021-03-10 22:10:59,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:10:59,223 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 337 transitions. [2021-03-10 22:10:59,223 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:10:59,223 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 337 transitions. [2021-03-10 22:10:59,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:10:59,224 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:10:59,224 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:10:59,424 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19471 [2021-03-10 22:10:59,424 INFO L428 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:10:59,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:10:59,424 INFO L82 PathProgramCache]: Analyzing trace with hash -1519254753, now seen corresponding path program 338 times [2021-03-10 22:10:59,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:10:59,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753536311] [2021-03-10 22:10:59,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:10:59,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:10:59,526 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:59,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753536311] [2021-03-10 22:10:59,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193894110] [2021-03-10 22:10:59,526 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:10:59,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:10:59,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:10:59,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:10:59,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:10:59,971 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:10:59,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:10:59,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:10:59,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200408113] [2021-03-10 22:10:59,971 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:10:59,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:10:59,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:10:59,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:10:59,971 INFO L87 Difference]: Start difference. First operand 159 states and 337 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:00,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:00,474 INFO L93 Difference]: Finished difference Result 224 states and 468 transitions. [2021-03-10 22:11:00,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:11:00,475 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:11:00,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:00,475 INFO L225 Difference]: With dead ends: 224 [2021-03-10 22:11:00,475 INFO L226 Difference]: Without dead ends: 224 [2021-03-10 22:11:00,475 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 512.3ms TimeCoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2021-03-10 22:11:00,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-03-10 22:11:00,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 159. [2021-03-10 22:11:00,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.132911392405063) internal successors, (337), 158 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:00,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 337 transitions. [2021-03-10 22:11:00,477 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 337 transitions. Word has length 19 [2021-03-10 22:11:00,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:00,477 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 337 transitions. [2021-03-10 22:11:00,477 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:00,477 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 337 transitions. [2021-03-10 22:11:00,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:11:00,477 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:00,477 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:00,677 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 339 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19487 [2021-03-10 22:11:00,678 INFO L428 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:00,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:00,678 INFO L82 PathProgramCache]: Analyzing trace with hash 629654432, now seen corresponding path program 339 times [2021-03-10 22:11:00,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:00,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813692935] [2021-03-10 22:11:00,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:00,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:00,779 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:00,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813692935] [2021-03-10 22:11:00,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158685898] [2021-03-10 22:11:00,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:00,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 22:11:00,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:00,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:11:00,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:01,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:01,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:01,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:11:01,167 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:01,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:11:01,172 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:01,287 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2021-03-10 22:11:01,288 INFO L628 ElimStorePlain]: treesize reduction 86, result has 48.8 percent of original size [2021-03-10 22:11:01,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:11:01,292 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:01,334 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:11:01,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:11:01,339 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:01,380 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:11:01,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:11:01,384 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:01,423 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:11:01,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:11:01,428 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:01,465 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:11:01,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:11:01,469 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:01,505 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:11:01,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:11:01,509 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:01,543 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:11:01,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:11:01,547 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:01,580 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:11:01,581 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:11:01,581 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:199, output treesize:13 [2021-03-10 22:11:01,622 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:01,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:01,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:11:01,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52093775] [2021-03-10 22:11:01,622 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:11:01,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:01,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:11:01,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:11:01,623 INFO L87 Difference]: Start difference. First operand 159 states and 337 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:01,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:01,869 INFO L93 Difference]: Finished difference Result 183 states and 386 transitions. [2021-03-10 22:11:01,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:11:01,869 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:11:01,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:01,870 INFO L225 Difference]: With dead ends: 183 [2021-03-10 22:11:01,870 INFO L226 Difference]: Without dead ends: 183 [2021-03-10 22:11:01,870 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 378.3ms TimeCoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:11:01,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-03-10 22:11:01,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 157. [2021-03-10 22:11:01,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.1346153846153846) internal successors, (333), 156 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:01,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 333 transitions. [2021-03-10 22:11:01,871 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 333 transitions. Word has length 19 [2021-03-10 22:11:01,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:01,871 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 333 transitions. [2021-03-10 22:11:01,871 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:01,871 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 333 transitions. [2021-03-10 22:11:01,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:11:01,871 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:01,872 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:02,072 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19548,340 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:02,072 INFO L428 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:02,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:02,072 INFO L82 PathProgramCache]: Analyzing trace with hash -1163224865, now seen corresponding path program 340 times [2021-03-10 22:11:02,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:02,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820746943] [2021-03-10 22:11:02,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:02,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:02,181 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:02,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820746943] [2021-03-10 22:11:02,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797202857] [2021-03-10 22:11:02,181 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:02,268 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:11:02,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:02,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:11:02,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:02,502 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:02,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:02,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:11:02,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629247731] [2021-03-10 22:11:02,503 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:11:02,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:02,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:11:02,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:11:02,503 INFO L87 Difference]: Start difference. First operand 157 states and 333 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:02,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:02,789 INFO L93 Difference]: Finished difference Result 193 states and 405 transitions. [2021-03-10 22:11:02,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:11:02,790 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:11:02,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:02,790 INFO L225 Difference]: With dead ends: 193 [2021-03-10 22:11:02,790 INFO L226 Difference]: Without dead ends: 193 [2021-03-10 22:11:02,790 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 311.4ms TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:11:02,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-03-10 22:11:02,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 159. [2021-03-10 22:11:02,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.132911392405063) internal successors, (337), 158 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:02,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 337 transitions. [2021-03-10 22:11:02,792 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 337 transitions. Word has length 19 [2021-03-10 22:11:02,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:02,792 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 337 transitions. [2021-03-10 22:11:02,792 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:02,792 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 337 transitions. [2021-03-10 22:11:02,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:11:02,792 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:02,792 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:02,992 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19570,341 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:02,992 INFO L428 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:02,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:02,992 INFO L82 PathProgramCache]: Analyzing trace with hash 2117227953, now seen corresponding path program 341 times [2021-03-10 22:11:02,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:02,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272479654] [2021-03-10 22:11:02,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:02,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:03,098 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:03,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272479654] [2021-03-10 22:11:03,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134731497] [2021-03-10 22:11:03,098 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:03,184 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 22:11:03,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:03,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:11:03,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:03,495 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:03,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:03,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:11:03,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908252530] [2021-03-10 22:11:03,496 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:11:03,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:03,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:11:03,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:11:03,496 INFO L87 Difference]: Start difference. First operand 159 states and 337 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:03,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:03,884 INFO L93 Difference]: Finished difference Result 218 states and 455 transitions. [2021-03-10 22:11:03,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:11:03,885 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:11:03,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:03,885 INFO L225 Difference]: With dead ends: 218 [2021-03-10 22:11:03,885 INFO L226 Difference]: Without dead ends: 218 [2021-03-10 22:11:03,885 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 384.0ms TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:11:03,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-03-10 22:11:03,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 159. [2021-03-10 22:11:03,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.132911392405063) internal successors, (337), 158 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:03,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 337 transitions. [2021-03-10 22:11:03,887 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 337 transitions. Word has length 19 [2021-03-10 22:11:03,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:03,887 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 337 transitions. [2021-03-10 22:11:03,887 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:03,887 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 337 transitions. [2021-03-10 22:11:03,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:11:03,887 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:03,887 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:04,087 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19594,342 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:04,088 INFO L428 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:04,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:04,088 INFO L82 PathProgramCache]: Analyzing trace with hash 1669890230, now seen corresponding path program 342 times [2021-03-10 22:11:04,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:04,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260229049] [2021-03-10 22:11:04,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:04,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:04,197 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:04,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260229049] [2021-03-10 22:11:04,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153785324] [2021-03-10 22:11:04,197 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:04,283 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 22:11:04,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:04,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:11:04,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:04,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:11:04,512 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:04,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:04,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:11:04,517 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:04,596 INFO L628 ElimStorePlain]: treesize reduction 63, result has 45.7 percent of original size [2021-03-10 22:11:04,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:11:04,600 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:04,628 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:11:04,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:11:04,631 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:04,657 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:11:04,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:11:04,661 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:04,686 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:11:04,687 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:11:04,687 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 7 variables, input treesize:128, output treesize:13 [2021-03-10 22:11:04,727 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:04,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:04,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:11:04,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944247111] [2021-03-10 22:11:04,727 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:11:04,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:04,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:11:04,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:11:04,728 INFO L87 Difference]: Start difference. First operand 159 states and 337 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:05,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:05,021 INFO L93 Difference]: Finished difference Result 181 states and 382 transitions. [2021-03-10 22:11:05,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:11:05,022 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:11:05,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:05,022 INFO L225 Difference]: With dead ends: 181 [2021-03-10 22:11:05,022 INFO L226 Difference]: Without dead ends: 181 [2021-03-10 22:11:05,022 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 371.4ms TimeCoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:11:05,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-03-10 22:11:05,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 158. [2021-03-10 22:11:05,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.1337579617834397) internal successors, (335), 157 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:05,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 335 transitions. [2021-03-10 22:11:05,024 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 335 transitions. Word has length 19 [2021-03-10 22:11:05,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:05,024 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 335 transitions. [2021-03-10 22:11:05,024 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:05,024 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 335 transitions. [2021-03-10 22:11:05,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:11:05,024 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:05,024 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:05,224 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19638,343 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:05,224 INFO L428 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:05,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:05,225 INFO L82 PathProgramCache]: Analyzing trace with hash 108726367, now seen corresponding path program 343 times [2021-03-10 22:11:05,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:05,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660750752] [2021-03-10 22:11:05,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:05,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:05,335 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:05,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660750752] [2021-03-10 22:11:05,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788667549] [2021-03-10 22:11:05,335 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:05,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:05,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:11:05,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:05,709 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:05,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:05,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:11:05,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568137094] [2021-03-10 22:11:05,710 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:11:05,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:05,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:11:05,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:11:05,710 INFO L87 Difference]: Start difference. First operand 158 states and 335 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:05,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:05,984 INFO L93 Difference]: Finished difference Result 198 states and 408 transitions. [2021-03-10 22:11:05,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:11:05,985 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:11:05,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:05,985 INFO L225 Difference]: With dead ends: 198 [2021-03-10 22:11:05,985 INFO L226 Difference]: Without dead ends: 198 [2021-03-10 22:11:05,985 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 313.3ms TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:11:05,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-03-10 22:11:05,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 158. [2021-03-10 22:11:05,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.1337579617834397) internal successors, (335), 157 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:05,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 335 transitions. [2021-03-10 22:11:05,987 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 335 transitions. Word has length 19 [2021-03-10 22:11:05,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:05,987 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 335 transitions. [2021-03-10 22:11:05,987 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:05,987 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 335 transitions. [2021-03-10 22:11:05,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:11:05,987 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:05,987 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:06,187 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19659,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:06,187 INFO L428 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:06,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:06,188 INFO L82 PathProgramCache]: Analyzing trace with hash -2037331744, now seen corresponding path program 344 times [2021-03-10 22:11:06,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:06,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801939671] [2021-03-10 22:11:06,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:06,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:06,293 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:06,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801939671] [2021-03-10 22:11:06,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188145795] [2021-03-10 22:11:06,293 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 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 [2021-03-10 22:11:06,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:11:06,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:06,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:11:06,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:06,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:11:06,604 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:06,606 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:06,607 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:06,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:06,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:06,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:11:06,612 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:06,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:06,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:06,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:11:06,616 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:06,624 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:06,625 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:06,628 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:06,629 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:06,669 INFO L628 ElimStorePlain]: treesize reduction 4, result has 89.2 percent of original size [2021-03-10 22:11:06,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:11:06,672 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:06,704 INFO L628 ElimStorePlain]: treesize reduction 1, result has 96.6 percent of original size [2021-03-10 22:11:06,705 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:11:06,705 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 3 variables, input treesize:140, output treesize:12 [2021-03-10 22:11:06,736 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:06,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:06,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:11:06,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346269337] [2021-03-10 22:11:06,737 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:11:06,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:06,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:11:06,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:11:06,737 INFO L87 Difference]: Start difference. First operand 158 states and 335 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:07,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:07,112 INFO L93 Difference]: Finished difference Result 231 states and 469 transitions. [2021-03-10 22:11:07,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:11:07,113 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:11:07,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:07,113 INFO L225 Difference]: With dead ends: 231 [2021-03-10 22:11:07,113 INFO L226 Difference]: Without dead ends: 231 [2021-03-10 22:11:07,113 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 378.5ms TimeCoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:11:07,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-03-10 22:11:07,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 161. [2021-03-10 22:11:07,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.15625) internal successors, (345), 160 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:07,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 345 transitions. [2021-03-10 22:11:07,115 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 345 transitions. Word has length 19 [2021-03-10 22:11:07,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:07,115 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 345 transitions. [2021-03-10 22:11:07,115 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:07,115 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 345 transitions. [2021-03-10 22:11:07,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:11:07,115 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:07,115 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:07,316 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19703,345 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:07,316 INFO L428 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:07,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:07,316 INFO L82 PathProgramCache]: Analyzing trace with hash 1722405750, now seen corresponding path program 345 times [2021-03-10 22:11:07,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:07,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571477775] [2021-03-10 22:11:07,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:07,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:07,425 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:07,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571477775] [2021-03-10 22:11:07,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223352910] [2021-03-10 22:11:07,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:07,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 22:11:07,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:07,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:11:07,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:07,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:07,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:07,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:11:07,770 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:07,773 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:07,774 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:07,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:07,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:07,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:11:07,778 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:07,780 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:07,781 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:07,795 INFO L628 ElimStorePlain]: treesize reduction 4, result has 81.8 percent of original size [2021-03-10 22:11:07,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:11:07,799 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:07,804 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:11:07,805 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:11:07,805 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:114, output treesize:6 [2021-03-10 22:11:07,815 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:07,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:07,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:11:07,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798839164] [2021-03-10 22:11:07,815 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:11:07,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:07,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:11:07,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:11:07,816 INFO L87 Difference]: Start difference. First operand 161 states and 345 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:08,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:08,071 INFO L93 Difference]: Finished difference Result 189 states and 396 transitions. [2021-03-10 22:11:08,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:11:08,071 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:11:08,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:08,072 INFO L225 Difference]: With dead ends: 189 [2021-03-10 22:11:08,072 INFO L226 Difference]: Without dead ends: 189 [2021-03-10 22:11:08,072 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 279.6ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:11:08,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-03-10 22:11:08,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 159. [2021-03-10 22:11:08,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.1392405063291138) internal successors, (338), 158 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:08,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 338 transitions. [2021-03-10 22:11:08,073 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 338 transitions. Word has length 19 [2021-03-10 22:11:08,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:08,073 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 338 transitions. [2021-03-10 22:11:08,073 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:08,073 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 338 transitions. [2021-03-10 22:11:08,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:11:08,073 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:08,073 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:08,274 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19737,346 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:08,274 INFO L428 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:08,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:08,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1357685215, now seen corresponding path program 346 times [2021-03-10 22:11:08,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:08,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395705924] [2021-03-10 22:11:08,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:08,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:08,374 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:08,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395705924] [2021-03-10 22:11:08,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915117958] [2021-03-10 22:11:08,375 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 22:11:08,460 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:11:08,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:08,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:11:08,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:08,731 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:08,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:08,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:11:08,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250728269] [2021-03-10 22:11:08,731 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:11:08,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:08,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:11:08,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:11:08,731 INFO L87 Difference]: Start difference. First operand 159 states and 338 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:08,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:08,978 INFO L93 Difference]: Finished difference Result 171 states and 358 transitions. [2021-03-10 22:11:08,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:11:08,978 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:11:08,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:08,979 INFO L225 Difference]: With dead ends: 171 [2021-03-10 22:11:08,979 INFO L226 Difference]: Without dead ends: 167 [2021-03-10 22:11:08,979 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 306.4ms TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:11:08,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-03-10 22:11:08,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 155. [2021-03-10 22:11:08,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.1363636363636362) internal successors, (329), 154 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) [2021-03-10 22:11:08,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 329 transitions. [2021-03-10 22:11:08,980 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 329 transitions. Word has length 19 [2021-03-10 22:11:08,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:08,980 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 329 transitions. [2021-03-10 22:11:08,980 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:08,980 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 329 transitions. [2021-03-10 22:11:08,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:11:08,980 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:08,980 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:09,181 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 347 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19776 [2021-03-10 22:11:09,181 INFO L428 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:09,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:09,181 INFO L82 PathProgramCache]: Analyzing trace with hash -41464289, now seen corresponding path program 347 times [2021-03-10 22:11:09,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:09,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711289006] [2021-03-10 22:11:09,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:09,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:09,288 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:09,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711289006] [2021-03-10 22:11:09,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247134253] [2021-03-10 22:11:09,288 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:09,376 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 22:11:09,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:09,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:11:09,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:09,620 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:09,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:09,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:11:09,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012794525] [2021-03-10 22:11:09,620 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:11:09,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:09,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:11:09,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:11:09,620 INFO L87 Difference]: Start difference. First operand 155 states and 329 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:09,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:09,841 INFO L93 Difference]: Finished difference Result 191 states and 401 transitions. [2021-03-10 22:11:09,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:11:09,842 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:11:09,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:09,842 INFO L225 Difference]: With dead ends: 191 [2021-03-10 22:11:09,842 INFO L226 Difference]: Without dead ends: 191 [2021-03-10 22:11:09,842 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 270.0ms TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:11:09,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-03-10 22:11:09,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 156. [2021-03-10 22:11:09,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.1354838709677417) internal successors, (331), 155 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) [2021-03-10 22:11:09,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 331 transitions. [2021-03-10 22:11:09,844 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 331 transitions. Word has length 19 [2021-03-10 22:11:09,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:09,844 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 331 transitions. [2021-03-10 22:11:09,844 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:09,844 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 331 transitions. [2021-03-10 22:11:09,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:11:09,844 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:09,844 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:10,044 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19803,348 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:10,044 INFO L428 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:10,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:10,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1055978767, now seen corresponding path program 348 times [2021-03-10 22:11:10,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:10,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322323780] [2021-03-10 22:11:10,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:10,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:10,153 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:10,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322323780] [2021-03-10 22:11:10,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723896981] [2021-03-10 22:11:10,153 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:10,239 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 22:11:10,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:10,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:11:10,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:10,536 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:10,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:10,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:11:10,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843124023] [2021-03-10 22:11:10,536 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:11:10,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:10,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:11:10,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:11:10,536 INFO L87 Difference]: Start difference. First operand 156 states and 331 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:10,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:10,767 INFO L93 Difference]: Finished difference Result 212 states and 443 transitions. [2021-03-10 22:11:10,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:11:10,767 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:11:10,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:10,768 INFO L225 Difference]: With dead ends: 212 [2021-03-10 22:11:10,768 INFO L226 Difference]: Without dead ends: 212 [2021-03-10 22:11:10,768 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 253.1ms TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:11:10,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-03-10 22:11:10,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 156. [2021-03-10 22:11:10,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.1354838709677417) internal successors, (331), 155 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) [2021-03-10 22:11:10,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 331 transitions. [2021-03-10 22:11:10,769 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 331 transitions. Word has length 19 [2021-03-10 22:11:10,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:10,769 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 331 transitions. [2021-03-10 22:11:10,769 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:10,769 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 331 transitions. [2021-03-10 22:11:10,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:11:10,769 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:10,769 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:10,970 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19834,349 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:10,970 INFO L428 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:10,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:10,970 INFO L82 PathProgramCache]: Analyzing trace with hash -1503316490, now seen corresponding path program 349 times [2021-03-10 22:11:10,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:10,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491665565] [2021-03-10 22:11:10,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:10,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:11,078 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:11,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491665565] [2021-03-10 22:11:11,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67751344] [2021-03-10 22:11:11,078 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:11,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:11,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:11:11,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:11,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:11:11,399 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:11,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:11,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:11:11,403 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:11,480 INFO L628 ElimStorePlain]: treesize reduction 51, result has 51.4 percent of original size [2021-03-10 22:11:11,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:11:11,484 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:11,512 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:11:11,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:11:11,516 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:11,542 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:11:11,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:11:11,545 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:11,570 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:11:11,571 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:11:11,571 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 7 variables, input treesize:128, output treesize:13 [2021-03-10 22:11:11,612 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:11,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:11,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:11:11,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11256364] [2021-03-10 22:11:11,613 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:11:11,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:11,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:11:11,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:11:11,613 INFO L87 Difference]: Start difference. First operand 156 states and 331 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:11,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:11,791 INFO L93 Difference]: Finished difference Result 175 states and 369 transitions. [2021-03-10 22:11:11,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:11:11,792 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:11:11,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:11,792 INFO L225 Difference]: With dead ends: 175 [2021-03-10 22:11:11,792 INFO L226 Difference]: Without dead ends: 175 [2021-03-10 22:11:11,792 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 299.9ms TimeCoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:11:11,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-03-10 22:11:11,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 155. [2021-03-10 22:11:11,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.1363636363636362) internal successors, (329), 154 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) [2021-03-10 22:11:11,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 329 transitions. [2021-03-10 22:11:11,793 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 329 transitions. Word has length 19 [2021-03-10 22:11:11,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:11,793 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 329 transitions. [2021-03-10 22:11:11,793 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:11,793 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 329 transitions. [2021-03-10 22:11:11,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:11:11,794 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:11,794 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:11,994 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19874 [2021-03-10 22:11:11,994 INFO L428 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:11,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:11,994 INFO L82 PathProgramCache]: Analyzing trace with hash -468233445, now seen corresponding path program 350 times [2021-03-10 22:11:11,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:11,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805294395] [2021-03-10 22:11:11,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:11,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:12,103 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:12,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805294395] [2021-03-10 22:11:12,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981502982] [2021-03-10 22:11:12,104 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:12,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:11:12,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:12,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:11:12,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:12,462 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:12,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:12,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:11:12,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746915021] [2021-03-10 22:11:12,463 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:11:12,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:12,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:11:12,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:11:12,463 INFO L87 Difference]: Start difference. First operand 155 states and 329 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:12,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:12,796 INFO L93 Difference]: Finished difference Result 204 states and 412 transitions. [2021-03-10 22:11:12,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:11:12,797 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:11:12,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:12,797 INFO L225 Difference]: With dead ends: 204 [2021-03-10 22:11:12,797 INFO L226 Difference]: Without dead ends: 204 [2021-03-10 22:11:12,797 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 374.6ms TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:11:12,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-03-10 22:11:12,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 157. [2021-03-10 22:11:12,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.141025641025641) internal successors, (334), 156 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:12,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 334 transitions. [2021-03-10 22:11:12,798 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 334 transitions. Word has length 19 [2021-03-10 22:11:12,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:12,798 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 334 transitions. [2021-03-10 22:11:12,798 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:12,799 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 334 transitions. [2021-03-10 22:11:12,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:11:12,799 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:12,799 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:13,011 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 351 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19895 [2021-03-10 22:11:13,011 INFO L428 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:13,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:13,011 INFO L82 PathProgramCache]: Analyzing trace with hash -1450800970, now seen corresponding path program 351 times [2021-03-10 22:11:13,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:13,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122077703] [2021-03-10 22:11:13,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:13,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:13,123 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:13,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122077703] [2021-03-10 22:11:13,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754303382] [2021-03-10 22:11:13,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:13,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 22:11:13,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:13,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:11:13,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:13,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:13,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:13,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:11:13,428 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:13,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:13,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:11:13,432 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:13,455 INFO L628 ElimStorePlain]: treesize reduction 25, result has 41.9 percent of original size [2021-03-10 22:11:13,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:11:13,458 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:13,464 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:11:13,465 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:11:13,465 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:71, output treesize:6 [2021-03-10 22:11:13,474 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:13,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:13,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:11:13,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441986699] [2021-03-10 22:11:13,475 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:11:13,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:13,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:11:13,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:11:13,475 INFO L87 Difference]: Start difference. First operand 157 states and 334 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:13,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:13,776 INFO L93 Difference]: Finished difference Result 186 states and 390 transitions. [2021-03-10 22:11:13,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:11:13,776 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:11:13,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:13,777 INFO L225 Difference]: With dead ends: 186 [2021-03-10 22:11:13,777 INFO L226 Difference]: Without dead ends: 186 [2021-03-10 22:11:13,777 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 332.6ms TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:11:13,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-03-10 22:11:13,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 157. [2021-03-10 22:11:13,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.141025641025641) internal successors, (334), 156 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:13,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 334 transitions. [2021-03-10 22:11:13,778 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 334 transitions. Word has length 19 [2021-03-10 22:11:13,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:13,778 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 334 transitions. [2021-03-10 22:11:13,778 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:13,778 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 334 transitions. [2021-03-10 22:11:13,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:11:13,778 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:13,778 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:13,987 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19929,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:13,987 INFO L428 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:13,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:13,987 INFO L82 PathProgramCache]: Analyzing trace with hash -1815521505, now seen corresponding path program 352 times [2021-03-10 22:11:13,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:13,987 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918691486] [2021-03-10 22:11:13,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:13,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:14,090 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:14,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918691486] [2021-03-10 22:11:14,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751564184] [2021-03-10 22:11:14,090 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 22:11:14,177 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:11:14,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:14,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:11:14,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:14,448 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:14,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:14,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:11:14,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288423304] [2021-03-10 22:11:14,449 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:11:14,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:14,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:11:14,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:11:14,449 INFO L87 Difference]: Start difference. First operand 157 states and 334 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:14,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:14,731 INFO L93 Difference]: Finished difference Result 171 states and 358 transitions. [2021-03-10 22:11:14,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:11:14,732 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:11:14,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:14,732 INFO L225 Difference]: With dead ends: 171 [2021-03-10 22:11:14,732 INFO L226 Difference]: Without dead ends: 167 [2021-03-10 22:11:14,732 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 338.7ms TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:11:14,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-03-10 22:11:14,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 157. [2021-03-10 22:11:14,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.1346153846153846) internal successors, (333), 156 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:14,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 333 transitions. [2021-03-10 22:11:14,733 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 333 transitions. Word has length 19 [2021-03-10 22:11:14,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:14,733 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 333 transitions. [2021-03-10 22:11:14,733 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:14,733 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 333 transitions. [2021-03-10 22:11:14,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:11:14,734 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:14,734 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:14,934 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 353 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19952 [2021-03-10 22:11:14,934 INFO L428 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:14,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:14,934 INFO L82 PathProgramCache]: Analyzing trace with hash -2024244555, now seen corresponding path program 353 times [2021-03-10 22:11:14,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:14,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524676079] [2021-03-10 22:11:14,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:14,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:15,041 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:15,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524676079] [2021-03-10 22:11:15,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453553054] [2021-03-10 22:11:15,041 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:15,128 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:11:15,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:15,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:11:15,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:15,425 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:15,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:15,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:11:15,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469061589] [2021-03-10 22:11:15,426 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:11:15,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:15,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:11:15,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:11:15,426 INFO L87 Difference]: Start difference. First operand 157 states and 333 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:15,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:15,810 INFO L93 Difference]: Finished difference Result 202 states and 417 transitions. [2021-03-10 22:11:15,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:11:15,811 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:11:15,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:15,811 INFO L225 Difference]: With dead ends: 202 [2021-03-10 22:11:15,811 INFO L226 Difference]: Without dead ends: 202 [2021-03-10 22:11:15,812 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 443.0ms TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:11:15,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-03-10 22:11:15,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 157. [2021-03-10 22:11:15,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.1346153846153846) internal successors, (333), 156 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:15,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 333 transitions. [2021-03-10 22:11:15,813 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 333 transitions. Word has length 19 [2021-03-10 22:11:15,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:15,813 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 333 transitions. [2021-03-10 22:11:15,813 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:15,813 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 333 transitions. [2021-03-10 22:11:15,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:11:15,813 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:15,813 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:16,014 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19977,354 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:16,014 INFO L428 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:16,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:16,014 INFO L82 PathProgramCache]: Analyzing trace with hash 124664630, now seen corresponding path program 354 times [2021-03-10 22:11:16,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:16,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722684227] [2021-03-10 22:11:16,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:16,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:16,131 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:16,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722684227] [2021-03-10 22:11:16,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139193681] [2021-03-10 22:11:16,131 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:16,220 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 22:11:16,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:16,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:11:16,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:16,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:16,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:16,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:11:16,583 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:16,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:11:16,587 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:16,589 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:16,590 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:16,593 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:16,593 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:16,596 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:16,596 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:16,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:11:16,600 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:16,603 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:16,603 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:16,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:16,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:11:16,607 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:16,680 INFO L628 ElimStorePlain]: treesize reduction 25, result has 56.9 percent of original size [2021-03-10 22:11:16,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:11:16,683 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:16,715 INFO L628 ElimStorePlain]: treesize reduction 1, result has 96.6 percent of original size [2021-03-10 22:11:16,716 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:11:16,716 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 3 variables, input treesize:199, output treesize:12 [2021-03-10 22:11:16,749 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:16,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:16,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:11:16,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506707479] [2021-03-10 22:11:16,749 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:11:16,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:16,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:11:16,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:11:16,750 INFO L87 Difference]: Start difference. First operand 157 states and 333 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:17,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:17,500 INFO L93 Difference]: Finished difference Result 250 states and 500 transitions. [2021-03-10 22:11:17,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 22:11:17,501 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:11:17,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:17,501 INFO L225 Difference]: With dead ends: 250 [2021-03-10 22:11:17,501 INFO L226 Difference]: Without dead ends: 250 [2021-03-10 22:11:17,501 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 746.1ms TimeCoverageRelationStatistics Valid=192, Invalid=864, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 22:11:17,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-03-10 22:11:17,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 162. [2021-03-10 22:11:17,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 2.1677018633540373) internal successors, (349), 161 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:17,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 349 transitions. [2021-03-10 22:11:17,503 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 349 transitions. Word has length 19 [2021-03-10 22:11:17,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:17,503 INFO L480 AbstractCegarLoop]: Abstraction has 162 states and 349 transitions. [2021-03-10 22:11:17,503 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:17,503 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 349 transitions. [2021-03-10 22:11:17,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:11:17,504 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:17,504 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:17,718 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 355 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20012 [2021-03-10 22:11:17,718 INFO L428 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:17,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:17,718 INFO L82 PathProgramCache]: Analyzing trace with hash -410565172, now seen corresponding path program 355 times [2021-03-10 22:11:17,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:17,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217606035] [2021-03-10 22:11:17,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:17,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:17,823 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:17,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217606035] [2021-03-10 22:11:17,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408866704] [2021-03-10 22:11:17,824 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:17,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:17,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:11:17,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:18,126 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:18,127 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:18,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:18,130 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:18,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:11:18,131 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:18,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:18,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:11:18,135 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:18,149 INFO L628 ElimStorePlain]: treesize reduction 4, result has 81.8 percent of original size [2021-03-10 22:11:18,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:11:18,152 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:18,158 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:11:18,159 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:11:18,159 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:79, output treesize:6 [2021-03-10 22:11:18,168 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:18,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:18,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:11:18,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241836903] [2021-03-10 22:11:18,169 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:11:18,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:18,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:11:18,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:11:18,169 INFO L87 Difference]: Start difference. First operand 162 states and 349 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:18,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:18,644 INFO L93 Difference]: Finished difference Result 195 states and 409 transitions. [2021-03-10 22:11:18,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:11:18,644 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:11:18,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:18,645 INFO L225 Difference]: With dead ends: 195 [2021-03-10 22:11:18,645 INFO L226 Difference]: Without dead ends: 195 [2021-03-10 22:11:18,645 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 502.0ms TimeCoverageRelationStatistics Valid=133, Invalid=679, Unknown=0, NotChecked=0, Total=812 [2021-03-10 22:11:18,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-03-10 22:11:18,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 162. [2021-03-10 22:11:18,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 2.1677018633540373) internal successors, (349), 161 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:18,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 349 transitions. [2021-03-10 22:11:18,646 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 349 transitions. Word has length 19 [2021-03-10 22:11:18,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:18,646 INFO L480 AbstractCegarLoop]: Abstraction has 162 states and 349 transitions. [2021-03-10 22:11:18,646 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:18,646 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 349 transitions. [2021-03-10 22:11:18,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:11:18,647 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:18,647 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:18,847 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20090,356 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:18,847 INFO L428 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:18,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:18,847 INFO L82 PathProgramCache]: Analyzing trace with hash -775285707, now seen corresponding path program 356 times [2021-03-10 22:11:18,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:18,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536514074] [2021-03-10 22:11:18,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:18,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:18,951 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:18,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536514074] [2021-03-10 22:11:18,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346378905] [2021-03-10 22:11:18,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:19,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:11:19,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:19,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:11:19,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:19,328 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:19,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:19,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:11:19,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070420537] [2021-03-10 22:11:19,328 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:11:19,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:19,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:11:19,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:11:19,329 INFO L87 Difference]: Start difference. First operand 162 states and 349 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:19,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:19,715 INFO L93 Difference]: Finished difference Result 182 states and 384 transitions. [2021-03-10 22:11:19,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:11:19,715 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:11:19,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:19,716 INFO L225 Difference]: With dead ends: 182 [2021-03-10 22:11:19,716 INFO L226 Difference]: Without dead ends: 176 [2021-03-10 22:11:19,716 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 462.5ms TimeCoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:11:19,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-03-10 22:11:19,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 161. [2021-03-10 22:11:19,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.15625) internal successors, (345), 160 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:19,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 345 transitions. [2021-03-10 22:11:19,717 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 345 transitions. Word has length 19 [2021-03-10 22:11:19,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:19,717 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 345 transitions. [2021-03-10 22:11:19,717 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:19,717 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 345 transitions. [2021-03-10 22:11:19,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:11:19,718 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:19,718 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:19,918 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20109,357 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:19,918 INFO L428 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:19,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:19,918 INFO L82 PathProgramCache]: Analyzing trace with hash 177180150, now seen corresponding path program 357 times [2021-03-10 22:11:19,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:19,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099223602] [2021-03-10 22:11:19,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:19,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:20,020 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:20,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099223602] [2021-03-10 22:11:20,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433825792] [2021-03-10 22:11:20,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:20,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:11:20,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:20,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:11:20,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:20,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:20,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:20,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:11:20,335 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:20,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:20,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:11:20,339 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:20,362 INFO L628 ElimStorePlain]: treesize reduction 25, result has 41.9 percent of original size [2021-03-10 22:11:20,364 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:11:20,366 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:20,371 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:11:20,372 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:11:20,372 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:71, output treesize:6 [2021-03-10 22:11:20,382 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:20,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:20,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:11:20,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802983574] [2021-03-10 22:11:20,382 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:11:20,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:20,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:11:20,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:11:20,382 INFO L87 Difference]: Start difference. First operand 161 states and 345 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:20,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:20,619 INFO L93 Difference]: Finished difference Result 188 states and 392 transitions. [2021-03-10 22:11:20,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:11:20,620 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:11:20,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:20,620 INFO L225 Difference]: With dead ends: 188 [2021-03-10 22:11:20,620 INFO L226 Difference]: Without dead ends: 188 [2021-03-10 22:11:20,620 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 308.7ms TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:11:20,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-03-10 22:11:20,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 157. [2021-03-10 22:11:20,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.1346153846153846) internal successors, (333), 156 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:20,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 333 transitions. [2021-03-10 22:11:20,622 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 333 transitions. Word has length 19 [2021-03-10 22:11:20,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:20,622 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 333 transitions. [2021-03-10 22:11:20,622 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:20,622 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 333 transitions. [2021-03-10 22:11:20,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:11:20,622 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:20,622 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:20,822 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 358 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20135 [2021-03-10 22:11:20,822 INFO L428 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:20,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:20,823 INFO L82 PathProgramCache]: Analyzing trace with hash -1540426277, now seen corresponding path program 358 times [2021-03-10 22:11:20,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:20,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677129103] [2021-03-10 22:11:20,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:20,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:20,971 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:20,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677129103] [2021-03-10 22:11:20,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366437284] [2021-03-10 22:11:20,971 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:21,072 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:11:21,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:21,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:11:21,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:21,423 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:21,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:21,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:11:21,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642597827] [2021-03-10 22:11:21,423 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:11:21,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:21,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:11:21,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:11:21,424 INFO L87 Difference]: Start difference. First operand 157 states and 333 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:21,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:21,855 INFO L93 Difference]: Finished difference Result 205 states and 416 transitions. [2021-03-10 22:11:21,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:11:21,856 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:11:21,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:21,856 INFO L225 Difference]: With dead ends: 205 [2021-03-10 22:11:21,856 INFO L226 Difference]: Without dead ends: 205 [2021-03-10 22:11:21,856 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 561.0ms TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:11:21,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-03-10 22:11:21,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 158. [2021-03-10 22:11:21,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.1464968152866244) internal successors, (337), 157 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:21,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 337 transitions. [2021-03-10 22:11:21,858 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 337 transitions. Word has length 19 [2021-03-10 22:11:21,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:21,858 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 337 transitions. [2021-03-10 22:11:21,858 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:21,858 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 337 transitions. [2021-03-10 22:11:21,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:11:21,858 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:21,858 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:22,058 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 359 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20157 [2021-03-10 22:11:22,058 INFO L428 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:22,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:22,059 INFO L82 PathProgramCache]: Analyzing trace with hash -1508479324, now seen corresponding path program 359 times [2021-03-10 22:11:22,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:22,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349462052] [2021-03-10 22:11:22,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:22,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:22,165 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:22,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349462052] [2021-03-10 22:11:22,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497306833] [2021-03-10 22:11:22,165 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:22,260 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 22:11:22,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:22,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:11:22,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:22,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:11:22,518 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:22,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:11:22,522 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:22,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:22,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:22,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:11:22,528 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:22,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:22,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:11:22,532 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:22,582 INFO L628 ElimStorePlain]: treesize reduction 60, result has 35.5 percent of original size [2021-03-10 22:11:22,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:11:22,585 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:22,618 INFO L628 ElimStorePlain]: treesize reduction 1, result has 96.6 percent of original size [2021-03-10 22:11:22,619 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:11:22,619 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:128, output treesize:12 [2021-03-10 22:11:22,654 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:22,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:22,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:11:22,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727262973] [2021-03-10 22:11:22,655 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:11:22,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:22,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:11:22,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:11:22,655 INFO L87 Difference]: Start difference. First operand 158 states and 337 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:23,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:23,102 INFO L93 Difference]: Finished difference Result 213 states and 433 transitions. [2021-03-10 22:11:23,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:11:23,102 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:11:23,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:23,103 INFO L225 Difference]: With dead ends: 213 [2021-03-10 22:11:23,103 INFO L226 Difference]: Without dead ends: 210 [2021-03-10 22:11:23,103 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 484.0ms TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:11:23,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-03-10 22:11:23,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 165. [2021-03-10 22:11:23,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 2.158536585365854) internal successors, (354), 164 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:23,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 354 transitions. [2021-03-10 22:11:23,104 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 354 transitions. Word has length 19 [2021-03-10 22:11:23,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:23,104 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 354 transitions. [2021-03-10 22:11:23,104 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:23,104 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 354 transitions. [2021-03-10 22:11:23,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:11:23,105 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:23,105 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:23,305 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20194,360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:23,305 INFO L428 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:23,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:23,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1987764000, now seen corresponding path program 360 times [2021-03-10 22:11:23,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:23,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205356567] [2021-03-10 22:11:23,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:23,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:23,414 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:23,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205356567] [2021-03-10 22:11:23,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590615752] [2021-03-10 22:11:23,415 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:23,504 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 22:11:23,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:23,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:11:23,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:23,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:11:23,887 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:23,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:11:23,891 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:23,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:23,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:23,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:11:23,896 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:23,899 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:23,900 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:23,903 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:23,904 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:23,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:11:23,908 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:23,910 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:23,911 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:23,914 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:23,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:11:23,915 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:23,960 INFO L628 ElimStorePlain]: treesize reduction 44, result has 42.9 percent of original size [2021-03-10 22:11:23,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:11:23,963 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:23,995 INFO L628 ElimStorePlain]: treesize reduction 1, result has 96.6 percent of original size [2021-03-10 22:11:23,996 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:11:23,996 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 3 variables, input treesize:199, output treesize:12 [2021-03-10 22:11:24,029 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:24,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:24,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:11:24,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962108279] [2021-03-10 22:11:24,030 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:11:24,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:24,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:11:24,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:11:24,030 INFO L87 Difference]: Start difference. First operand 165 states and 354 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:24,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:24,635 INFO L93 Difference]: Finished difference Result 219 states and 448 transitions. [2021-03-10 22:11:24,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:11:24,635 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:11:24,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:24,635 INFO L225 Difference]: With dead ends: 219 [2021-03-10 22:11:24,636 INFO L226 Difference]: Without dead ends: 219 [2021-03-10 22:11:24,636 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 662.6ms TimeCoverageRelationStatistics Valid=156, Invalid=714, Unknown=0, NotChecked=0, Total=870 [2021-03-10 22:11:24,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-03-10 22:11:24,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 165. [2021-03-10 22:11:24,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 2.158536585365854) internal successors, (354), 164 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:24,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 354 transitions. [2021-03-10 22:11:24,637 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 354 transitions. Word has length 19 [2021-03-10 22:11:24,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:24,637 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 354 transitions. [2021-03-10 22:11:24,637 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:24,637 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 354 transitions. [2021-03-10 22:11:24,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:11:24,638 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:24,638 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:24,838 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 361 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20234 [2021-03-10 22:11:24,838 INFO L428 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:24,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:24,838 INFO L82 PathProgramCache]: Analyzing trace with hash 331541803, now seen corresponding path program 361 times [2021-03-10 22:11:24,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:24,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943322231] [2021-03-10 22:11:24,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:24,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:24,946 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:24,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943322231] [2021-03-10 22:11:24,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372833651] [2021-03-10 22:11:24,947 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:25,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:25,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:11:25,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:25,356 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:25,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:25,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:11:25,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931939228] [2021-03-10 22:11:25,357 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:11:25,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:25,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:11:25,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:11:25,357 INFO L87 Difference]: Start difference. First operand 165 states and 354 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:25,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:25,830 INFO L93 Difference]: Finished difference Result 209 states and 426 transitions. [2021-03-10 22:11:25,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:11:25,831 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:11:25,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:25,831 INFO L225 Difference]: With dead ends: 209 [2021-03-10 22:11:25,831 INFO L226 Difference]: Without dead ends: 203 [2021-03-10 22:11:25,831 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 579.6ms TimeCoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:11:25,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-03-10 22:11:25,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 164. [2021-03-10 22:11:25,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.1411042944785277) internal successors, (349), 163 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:25,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 349 transitions. [2021-03-10 22:11:25,833 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 349 transitions. Word has length 19 [2021-03-10 22:11:25,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:25,833 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 349 transitions. [2021-03-10 22:11:25,833 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:25,833 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 349 transitions. [2021-03-10 22:11:25,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:11:25,833 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:25,833 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:26,033 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20316,362 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:26,034 INFO L428 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:26,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:26,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1771973494, now seen corresponding path program 362 times [2021-03-10 22:11:26,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:26,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143189539] [2021-03-10 22:11:26,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:26,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:26,142 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:26,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143189539] [2021-03-10 22:11:26,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360116369] [2021-03-10 22:11:26,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:26,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:11:26,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:26,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:11:26,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:26,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:26,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:26,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:11:26,510 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:26,513 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:26,514 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:26,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:26,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:26,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:11:26,518 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:26,520 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:26,521 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:26,535 INFO L628 ElimStorePlain]: treesize reduction 4, result has 81.8 percent of original size [2021-03-10 22:11:26,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:11:26,538 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:26,544 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:11:26,545 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:11:26,545 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:114, output treesize:6 [2021-03-10 22:11:26,555 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:26,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:26,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:11:26,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393800737] [2021-03-10 22:11:26,555 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:11:26,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:26,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:11:26,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:11:26,555 INFO L87 Difference]: Start difference. First operand 164 states and 349 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:27,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:27,108 INFO L93 Difference]: Finished difference Result 205 states and 425 transitions. [2021-03-10 22:11:27,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:11:27,109 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:11:27,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:27,109 INFO L225 Difference]: With dead ends: 205 [2021-03-10 22:11:27,109 INFO L226 Difference]: Without dead ends: 205 [2021-03-10 22:11:27,109 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 531.6ms TimeCoverageRelationStatistics Valid=134, Invalid=678, Unknown=0, NotChecked=0, Total=812 [2021-03-10 22:11:27,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-03-10 22:11:27,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 163. [2021-03-10 22:11:27,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 2.1419753086419755) internal successors, (347), 162 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:27,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 347 transitions. [2021-03-10 22:11:27,110 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 347 transitions. Word has length 19 [2021-03-10 22:11:27,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:27,111 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 347 transitions. [2021-03-10 22:11:27,111 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:27,111 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 347 transitions. [2021-03-10 22:11:27,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:11:27,111 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:27,111 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:27,311 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 363 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20352 [2021-03-10 22:11:27,311 INFO L428 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:27,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:27,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1935248480, now seen corresponding path program 363 times [2021-03-10 22:11:27,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:27,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853950895] [2021-03-10 22:11:27,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:27,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:27,417 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:27,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853950895] [2021-03-10 22:11:27,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029156735] [2021-03-10 22:11:27,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:27,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:11:27,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:27,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:11:27,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:27,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:27,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:27,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:11:27,787 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:27,789 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:27,790 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:27,792 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:27,793 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:27,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:27,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:11:27,797 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:27,811 INFO L628 ElimStorePlain]: treesize reduction 4, result has 81.8 percent of original size [2021-03-10 22:11:27,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:11:27,815 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:27,820 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:11:27,821 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:11:27,821 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:114, output treesize:6 [2021-03-10 22:11:27,831 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:27,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:27,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:11:27,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047039155] [2021-03-10 22:11:27,831 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:11:27,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:27,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:11:27,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:11:27,832 INFO L87 Difference]: Start difference. First operand 163 states and 347 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:28,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:28,156 INFO L93 Difference]: Finished difference Result 193 states and 403 transitions. [2021-03-10 22:11:28,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:11:28,157 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:11:28,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:28,157 INFO L225 Difference]: With dead ends: 193 [2021-03-10 22:11:28,157 INFO L226 Difference]: Without dead ends: 193 [2021-03-10 22:11:28,157 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 405.5ms TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:11:28,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-03-10 22:11:28,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 162. [2021-03-10 22:11:28,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 2.142857142857143) internal successors, (345), 161 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:28,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 345 transitions. [2021-03-10 22:11:28,159 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 345 transitions. Word has length 19 [2021-03-10 22:11:28,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:28,159 INFO L480 AbstractCegarLoop]: Abstraction has 162 states and 345 transitions. [2021-03-10 22:11:28,159 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:28,159 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 345 transitions. [2021-03-10 22:11:28,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:11:28,159 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:28,159 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:28,359 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 364 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20392 [2021-03-10 22:11:28,359 INFO L428 AbstractCegarLoop]: === Iteration 370 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:28,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:28,359 INFO L82 PathProgramCache]: Analyzing trace with hash -895012682, now seen corresponding path program 364 times [2021-03-10 22:11:28,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:28,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47091174] [2021-03-10 22:11:28,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:28,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:28,470 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:28,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47091174] [2021-03-10 22:11:28,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984932405] [2021-03-10 22:11:28,470 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:28,564 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:11:28,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:28,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:11:28,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:28,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:28,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:28,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:11:28,786 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:28,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:28,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:11:28,790 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:28,813 INFO L628 ElimStorePlain]: treesize reduction 25, result has 41.9 percent of original size [2021-03-10 22:11:28,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:11:28,816 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:28,822 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:11:28,822 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:11:28,822 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:71, output treesize:6 [2021-03-10 22:11:28,832 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:28,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:28,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:11:28,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162726439] [2021-03-10 22:11:28,832 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:11:28,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:28,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:11:28,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:11:28,833 INFO L87 Difference]: Start difference. First operand 162 states and 345 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:29,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:29,066 INFO L93 Difference]: Finished difference Result 181 states and 378 transitions. [2021-03-10 22:11:29,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:11:29,066 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:11:29,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:29,067 INFO L225 Difference]: With dead ends: 181 [2021-03-10 22:11:29,067 INFO L226 Difference]: Without dead ends: 181 [2021-03-10 22:11:29,067 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 319.2ms TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:11:29,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-03-10 22:11:29,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 156. [2021-03-10 22:11:29,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.129032258064516) internal successors, (330), 155 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:29,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 330 transitions. [2021-03-10 22:11:29,068 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 330 transitions. Word has length 19 [2021-03-10 22:11:29,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:29,068 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 330 transitions. [2021-03-10 22:11:29,068 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:29,068 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 330 transitions. [2021-03-10 22:11:29,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:11:29,068 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:29,069 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:29,279 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 365 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20432 [2021-03-10 22:11:29,279 INFO L428 AbstractCegarLoop]: === Iteration 371 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:29,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:29,279 INFO L82 PathProgramCache]: Analyzing trace with hash -934136993, now seen corresponding path program 365 times [2021-03-10 22:11:29,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:29,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842953001] [2021-03-10 22:11:29,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:29,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:29,374 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:29,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842953001] [2021-03-10 22:11:29,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055229128] [2021-03-10 22:11:29,374 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:29,466 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:11:29,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:29,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:11:29,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:29,710 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:29,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:29,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:11:29,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588918730] [2021-03-10 22:11:29,711 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:11:29,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:29,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:11:29,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:11:29,711 INFO L87 Difference]: Start difference. First operand 156 states and 330 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:29,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:29,954 INFO L93 Difference]: Finished difference Result 172 states and 356 transitions. [2021-03-10 22:11:29,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:11:29,954 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:11:29,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:29,954 INFO L225 Difference]: With dead ends: 172 [2021-03-10 22:11:29,954 INFO L226 Difference]: Without dead ends: 164 [2021-03-10 22:11:29,955 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 362.6ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:11:29,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-03-10 22:11:29,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 156. [2021-03-10 22:11:29,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.1225806451612903) internal successors, (329), 155 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) [2021-03-10 22:11:29,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 329 transitions. [2021-03-10 22:11:29,956 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 329 transitions. Word has length 19 [2021-03-10 22:11:29,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:29,956 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 329 transitions. [2021-03-10 22:11:29,956 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:29,956 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 329 transitions. [2021-03-10 22:11:29,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:11:29,956 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:29,956 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:30,156 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 366 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20455 [2021-03-10 22:11:30,157 INFO L428 AbstractCegarLoop]: === Iteration 372 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:30,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:30,157 INFO L82 PathProgramCache]: Analyzing trace with hash -835352655, now seen corresponding path program 366 times [2021-03-10 22:11:30,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:30,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303992255] [2021-03-10 22:11:30,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:30,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:30,265 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:30,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303992255] [2021-03-10 22:11:30,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963316632] [2021-03-10 22:11:30,266 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:30,356 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:11:30,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:30,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:11:30,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:30,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:30,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:30,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:11:30,608 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:30,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:30,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:30,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:11:30,612 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:30,615 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:30,615 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:30,617 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:30,618 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:30,633 INFO L628 ElimStorePlain]: treesize reduction 4, result has 81.8 percent of original size [2021-03-10 22:11:30,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:11:30,636 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:30,642 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:11:30,643 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:11:30,643 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:114, output treesize:6 [2021-03-10 22:11:30,650 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:30,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:30,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:11:30,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50539842] [2021-03-10 22:11:30,651 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:11:30,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:30,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:11:30,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:11:30,651 INFO L87 Difference]: Start difference. First operand 156 states and 329 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:30,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:30,882 INFO L93 Difference]: Finished difference Result 172 states and 361 transitions. [2021-03-10 22:11:30,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:11:30,882 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:11:30,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:30,883 INFO L225 Difference]: With dead ends: 172 [2021-03-10 22:11:30,883 INFO L226 Difference]: Without dead ends: 172 [2021-03-10 22:11:30,883 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 325.3ms TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:11:30,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-03-10 22:11:30,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 156. [2021-03-10 22:11:30,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.1225806451612903) internal successors, (329), 155 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) [2021-03-10 22:11:30,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 329 transitions. [2021-03-10 22:11:30,884 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 329 transitions. Word has length 19 [2021-03-10 22:11:30,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:30,884 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 329 transitions. [2021-03-10 22:11:30,884 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:30,884 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 329 transitions. [2021-03-10 22:11:30,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:11:30,884 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:30,884 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:31,085 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20474,367 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:31,085 INFO L428 AbstractCegarLoop]: === Iteration 373 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:31,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:31,085 INFO L82 PathProgramCache]: Analyzing trace with hash -826189821, now seen corresponding path program 367 times [2021-03-10 22:11:31,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:31,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396188716] [2021-03-10 22:11:31,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:31,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:31,204 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:31,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396188716] [2021-03-10 22:11:31,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273082469] [2021-03-10 22:11:31,204 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:31,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:31,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:11:31,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:31,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:31,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:31,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:11:31,583 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:31,603 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:31,604 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:31,606 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:31,607 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:31,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:31,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:11:31,611 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:31,628 INFO L628 ElimStorePlain]: treesize reduction 4, result has 81.8 percent of original size [2021-03-10 22:11:31,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:11:31,631 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:31,638 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:11:31,639 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:11:31,639 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:114, output treesize:6 [2021-03-10 22:11:31,646 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:31,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:31,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:11:31,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934275519] [2021-03-10 22:11:31,647 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:11:31,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:31,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:11:31,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:11:31,647 INFO L87 Difference]: Start difference. First operand 156 states and 329 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:32,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:32,040 INFO L93 Difference]: Finished difference Result 194 states and 405 transitions. [2021-03-10 22:11:32,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:11:32,041 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:11:32,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:32,041 INFO L225 Difference]: With dead ends: 194 [2021-03-10 22:11:32,041 INFO L226 Difference]: Without dead ends: 194 [2021-03-10 22:11:32,042 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 447.8ms TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:11:32,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-03-10 22:11:32,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 157. [2021-03-10 22:11:32,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.121794871794872) internal successors, (331), 156 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) [2021-03-10 22:11:32,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 331 transitions. [2021-03-10 22:11:32,043 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 331 transitions. Word has length 19 [2021-03-10 22:11:32,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:32,043 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 331 transitions. [2021-03-10 22:11:32,043 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:32,043 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 331 transitions. [2021-03-10 22:11:32,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:11:32,043 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:32,043 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:32,244 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20504,368 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:32,244 INFO L428 AbstractCegarLoop]: === Iteration 374 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:32,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:32,244 INFO L82 PathProgramCache]: Analyzing trace with hash 2083599729, now seen corresponding path program 368 times [2021-03-10 22:11:32,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:32,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837777603] [2021-03-10 22:11:32,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:32,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:32,364 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:32,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837777603] [2021-03-10 22:11:32,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681714331] [2021-03-10 22:11:32,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:32,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:11:32,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:32,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:11:32,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:32,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:32,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:32,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:11:32,758 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:32,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:32,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:32,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:11:32,763 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:32,766 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:32,767 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:32,770 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:32,771 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:32,787 INFO L628 ElimStorePlain]: treesize reduction 4, result has 81.8 percent of original size [2021-03-10 22:11:32,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:11:32,791 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:32,797 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:11:32,798 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:11:32,798 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:114, output treesize:6 [2021-03-10 22:11:32,806 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:32,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:32,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:11:32,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982291906] [2021-03-10 22:11:32,807 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:11:32,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:32,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:11:32,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:11:32,807 INFO L87 Difference]: Start difference. First operand 157 states and 331 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:33,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:33,407 INFO L93 Difference]: Finished difference Result 203 states and 423 transitions. [2021-03-10 22:11:33,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:11:33,407 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:11:33,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:33,408 INFO L225 Difference]: With dead ends: 203 [2021-03-10 22:11:33,408 INFO L226 Difference]: Without dead ends: 203 [2021-03-10 22:11:33,408 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 597.1ms TimeCoverageRelationStatistics Valid=134, Invalid=678, Unknown=0, NotChecked=0, Total=812 [2021-03-10 22:11:33,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-03-10 22:11:33,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 158. [2021-03-10 22:11:33,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.121019108280255) internal successors, (333), 157 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:33,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 333 transitions. [2021-03-10 22:11:33,409 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 333 transitions. Word has length 19 [2021-03-10 22:11:33,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:33,409 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 333 transitions. [2021-03-10 22:11:33,409 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:33,409 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 333 transitions. [2021-03-10 22:11:33,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:11:33,410 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:33,410 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:33,610 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20535,369 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:33,610 INFO L428 AbstractCegarLoop]: === Iteration 375 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:33,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:33,610 INFO L82 PathProgramCache]: Analyzing trace with hash -1527161657, now seen corresponding path program 369 times [2021-03-10 22:11:33,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:33,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448196752] [2021-03-10 22:11:33,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:33,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:33,720 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:33,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448196752] [2021-03-10 22:11:33,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534139010] [2021-03-10 22:11:33,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 22:11:33,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 22:11:33,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:33,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:11:33,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:34,182 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:34,183 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:34,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:11:34,187 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:34,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:11:34,206 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:34,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:34,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:34,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:11:34,212 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:34,215 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:34,216 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:34,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:34,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:34,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:11:34,222 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:34,224 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:34,225 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:34,228 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:34,229 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:34,281 INFO L628 ElimStorePlain]: treesize reduction 25, result has 56.9 percent of original size [2021-03-10 22:11:34,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:11:34,285 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:34,319 INFO L628 ElimStorePlain]: treesize reduction 1, result has 96.6 percent of original size [2021-03-10 22:11:34,320 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:11:34,320 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 3 variables, input treesize:199, output treesize:12 [2021-03-10 22:11:34,353 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:34,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:34,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:11:34,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606521775] [2021-03-10 22:11:34,354 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:11:34,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:34,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:11:34,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:11:34,354 INFO L87 Difference]: Start difference. First operand 158 states and 333 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:34,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:34,917 INFO L93 Difference]: Finished difference Result 208 states and 434 transitions. [2021-03-10 22:11:34,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:11:34,918 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:11:34,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:34,918 INFO L225 Difference]: With dead ends: 208 [2021-03-10 22:11:34,918 INFO L226 Difference]: Without dead ends: 208 [2021-03-10 22:11:34,918 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 594.5ms TimeCoverageRelationStatistics Valid=147, Invalid=665, Unknown=0, NotChecked=0, Total=812 [2021-03-10 22:11:34,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-03-10 22:11:34,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 158. [2021-03-10 22:11:34,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.121019108280255) internal successors, (333), 157 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:34,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 333 transitions. [2021-03-10 22:11:34,919 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 333 transitions. Word has length 19 [2021-03-10 22:11:34,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:34,920 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 333 transitions. [2021-03-10 22:11:34,920 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:34,920 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 333 transitions. [2021-03-10 22:11:34,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:11:34,920 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:34,920 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:35,120 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 370 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20573 [2021-03-10 22:11:35,120 INFO L428 AbstractCegarLoop]: === Iteration 376 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:35,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:35,120 INFO L82 PathProgramCache]: Analyzing trace with hash 621747528, now seen corresponding path program 370 times [2021-03-10 22:11:35,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:35,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211227726] [2021-03-10 22:11:35,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:35,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:35,231 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:35,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211227726] [2021-03-10 22:11:35,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923738069] [2021-03-10 22:11:35,231 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:35,322 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:11:35,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:35,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:11:35,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:35,673 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:35,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:35,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:11:35,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164729409] [2021-03-10 22:11:35,674 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:11:35,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:35,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:11:35,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:11:35,674 INFO L87 Difference]: Start difference. First operand 158 states and 333 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:35,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:35,930 INFO L93 Difference]: Finished difference Result 173 states and 364 transitions. [2021-03-10 22:11:35,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:11:35,931 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:11:35,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:35,931 INFO L225 Difference]: With dead ends: 173 [2021-03-10 22:11:35,931 INFO L226 Difference]: Without dead ends: 173 [2021-03-10 22:11:35,931 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 366.1ms TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:11:35,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-03-10 22:11:35,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 155. [2021-03-10 22:11:35,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.1233766233766236) internal successors, (327), 154 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:35,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 327 transitions. [2021-03-10 22:11:35,933 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 327 transitions. Word has length 19 [2021-03-10 22:11:35,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:35,933 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 327 transitions. [2021-03-10 22:11:35,933 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:35,933 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 327 transitions. [2021-03-10 22:11:35,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:11:35,933 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:35,933 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:36,133 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 371 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20652 [2021-03-10 22:11:36,133 INFO L428 AbstractCegarLoop]: === Iteration 377 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:36,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:36,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1356348845, now seen corresponding path program 371 times [2021-03-10 22:11:36,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:36,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751173010] [2021-03-10 22:11:36,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:36,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:36,237 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:36,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751173010] [2021-03-10 22:11:36,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16636512] [2021-03-10 22:11:36,237 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:36,327 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:11:36,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:36,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:11:36,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:36,610 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:36,611 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:36,613 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:36,614 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:36,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:36,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:36,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:11:36,618 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:36,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:36,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:11:36,622 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:36,637 INFO L628 ElimStorePlain]: treesize reduction 4, result has 81.8 percent of original size [2021-03-10 22:11:36,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:11:36,640 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:36,646 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:11:36,646 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:11:36,647 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:114, output treesize:6 [2021-03-10 22:11:36,654 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:36,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:36,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:11:36,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092626910] [2021-03-10 22:11:36,654 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:11:36,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:36,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:11:36,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:11:36,655 INFO L87 Difference]: Start difference. First operand 155 states and 327 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:36,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:36,966 INFO L93 Difference]: Finished difference Result 182 states and 381 transitions. [2021-03-10 22:11:36,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:11:36,966 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:11:36,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:36,967 INFO L225 Difference]: With dead ends: 182 [2021-03-10 22:11:36,967 INFO L226 Difference]: Without dead ends: 182 [2021-03-10 22:11:36,967 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 310.6ms TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:11:36,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-03-10 22:11:36,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 155. [2021-03-10 22:11:36,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.1233766233766236) internal successors, (327), 154 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:36,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 327 transitions. [2021-03-10 22:11:36,968 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 327 transitions. Word has length 19 [2021-03-10 22:11:36,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:36,968 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 327 transitions. [2021-03-10 22:11:36,968 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:36,968 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 327 transitions. [2021-03-10 22:11:36,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:11:36,968 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:36,969 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:37,169 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20689,372 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:37,169 INFO L428 AbstractCegarLoop]: === Iteration 378 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:37,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:37,169 INFO L82 PathProgramCache]: Analyzing trace with hash -28828901, now seen corresponding path program 372 times [2021-03-10 22:11:37,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:37,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352212174] [2021-03-10 22:11:37,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:37,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:37,276 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:37,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352212174] [2021-03-10 22:11:37,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179820168] [2021-03-10 22:11:37,276 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:37,368 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 22:11:37,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:37,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:11:37,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:37,650 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:37,651 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:37,653 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:37,654 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:37,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:37,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:37,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:11:37,658 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:37,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:37,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:11:37,662 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:37,677 INFO L628 ElimStorePlain]: treesize reduction 4, result has 81.8 percent of original size [2021-03-10 22:11:37,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:11:37,680 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:37,686 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:11:37,687 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:11:37,687 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:114, output treesize:6 [2021-03-10 22:11:37,694 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:37,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:37,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:11:37,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137056438] [2021-03-10 22:11:37,694 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:11:37,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:37,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:11:37,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:11:37,695 INFO L87 Difference]: Start difference. First operand 155 states and 327 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:38,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:38,175 INFO L93 Difference]: Finished difference Result 198 states and 413 transitions. [2021-03-10 22:11:38,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:11:38,176 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:11:38,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:38,176 INFO L225 Difference]: With dead ends: 198 [2021-03-10 22:11:38,176 INFO L226 Difference]: Without dead ends: 198 [2021-03-10 22:11:38,177 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 512.0ms TimeCoverageRelationStatistics Valid=133, Invalid=679, Unknown=0, NotChecked=0, Total=812 [2021-03-10 22:11:38,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-03-10 22:11:38,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 156. [2021-03-10 22:11:38,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.1225806451612903) internal successors, (329), 155 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) [2021-03-10 22:11:38,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 329 transitions. [2021-03-10 22:11:38,178 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 329 transitions. Word has length 19 [2021-03-10 22:11:38,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:38,178 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 329 transitions. [2021-03-10 22:11:38,178 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:38,178 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 329 transitions. [2021-03-10 22:11:38,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:11:38,178 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:38,178 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:38,378 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 373 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20730 [2021-03-10 22:11:38,379 INFO L428 AbstractCegarLoop]: === Iteration 379 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:38,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:38,379 INFO L82 PathProgramCache]: Analyzing trace with hash -1043343379, now seen corresponding path program 373 times [2021-03-10 22:11:38,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:38,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857388709] [2021-03-10 22:11:38,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:38,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:38,488 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:38,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857388709] [2021-03-10 22:11:38,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326243296] [2021-03-10 22:11:38,488 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 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 [2021-03-10 22:11:38,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:38,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:11:38,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:38,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:38,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:38,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:11:38,855 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:38,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:11:38,859 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:38,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:38,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:38,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:11:38,864 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:38,867 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:38,868 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:38,915 INFO L628 ElimStorePlain]: treesize reduction 41, result has 44.6 percent of original size [2021-03-10 22:11:38,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:11:38,919 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:38,951 INFO L628 ElimStorePlain]: treesize reduction 1, result has 96.6 percent of original size [2021-03-10 22:11:38,952 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:11:38,952 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:128, output treesize:12 [2021-03-10 22:11:38,987 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:38,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:38,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:11:38,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742583776] [2021-03-10 22:11:38,987 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:11:38,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:38,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:11:38,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:11:38,987 INFO L87 Difference]: Start difference. First operand 156 states and 329 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:39,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:39,514 INFO L93 Difference]: Finished difference Result 207 states and 431 transitions. [2021-03-10 22:11:39,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:11:39,515 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:11:39,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:39,515 INFO L225 Difference]: With dead ends: 207 [2021-03-10 22:11:39,515 INFO L226 Difference]: Without dead ends: 207 [2021-03-10 22:11:39,516 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 562.0ms TimeCoverageRelationStatistics Valid=146, Invalid=666, Unknown=0, NotChecked=0, Total=812 [2021-03-10 22:11:39,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-03-10 22:11:39,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 156. [2021-03-10 22:11:39,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.1225806451612903) internal successors, (329), 155 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) [2021-03-10 22:11:39,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 329 transitions. [2021-03-10 22:11:39,517 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 329 transitions. Word has length 19 [2021-03-10 22:11:39,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:39,517 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 329 transitions. [2021-03-10 22:11:39,517 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:39,517 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 329 transitions. [2021-03-10 22:11:39,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:11:39,517 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:39,517 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:39,718 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 374 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20771 [2021-03-10 22:11:39,718 INFO L428 AbstractCegarLoop]: === Iteration 380 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:39,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:39,718 INFO L82 PathProgramCache]: Analyzing trace with hash -1490681102, now seen corresponding path program 374 times [2021-03-10 22:11:39,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:39,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152759939] [2021-03-10 22:11:39,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:39,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:39,831 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:39,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152759939] [2021-03-10 22:11:39,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778099311] [2021-03-10 22:11:39,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:39,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:11:39,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:39,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:11:39,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:40,298 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:40,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:40,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:11:40,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112126705] [2021-03-10 22:11:40,299 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:11:40,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:40,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:11:40,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:11:40,299 INFO L87 Difference]: Start difference. First operand 156 states and 329 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:40,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:40,552 INFO L93 Difference]: Finished difference Result 171 states and 360 transitions. [2021-03-10 22:11:40,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:11:40,553 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:11:40,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:40,553 INFO L225 Difference]: With dead ends: 171 [2021-03-10 22:11:40,553 INFO L226 Difference]: Without dead ends: 171 [2021-03-10 22:11:40,553 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 379.0ms TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:11:40,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-03-10 22:11:40,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 154. [2021-03-10 22:11:40,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.1241830065359477) internal successors, (325), 153 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:40,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 325 transitions. [2021-03-10 22:11:40,555 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 325 transitions. Word has length 19 [2021-03-10 22:11:40,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:40,555 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 325 transitions. [2021-03-10 22:11:40,555 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:40,555 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 325 transitions. [2021-03-10 22:11:40,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:11:40,555 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:40,555 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:40,755 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20817,375 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:40,755 INFO L428 AbstractCegarLoop]: === Iteration 381 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:40,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:40,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1011406897, now seen corresponding path program 375 times [2021-03-10 22:11:40,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:40,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074365861] [2021-03-10 22:11:40,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:40,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:40,866 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:40,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074365861] [2021-03-10 22:11:40,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454171448] [2021-03-10 22:11:40,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:40,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 22:11:40,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:40,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:11:40,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:41,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:41,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:41,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:11:41,179 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:41,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:41,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:11:41,183 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:41,205 INFO L628 ElimStorePlain]: treesize reduction 25, result has 41.9 percent of original size [2021-03-10 22:11:41,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:11:41,209 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:41,214 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:11:41,215 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:11:41,215 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:71, output treesize:6 [2021-03-10 22:11:41,227 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:41,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:41,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:11:41,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316524768] [2021-03-10 22:11:41,228 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:11:41,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:41,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:11:41,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:11:41,228 INFO L87 Difference]: Start difference. First operand 154 states and 325 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:41,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:41,475 INFO L93 Difference]: Finished difference Result 184 states and 385 transitions. [2021-03-10 22:11:41,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:11:41,476 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:11:41,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:41,476 INFO L225 Difference]: With dead ends: 184 [2021-03-10 22:11:41,476 INFO L226 Difference]: Without dead ends: 184 [2021-03-10 22:11:41,476 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 330.0ms TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:11:41,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-03-10 22:11:41,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 156. [2021-03-10 22:11:41,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.1225806451612903) internal successors, (329), 155 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) [2021-03-10 22:11:41,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 329 transitions. [2021-03-10 22:11:41,477 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 329 transitions. Word has length 19 [2021-03-10 22:11:41,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:41,477 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 329 transitions. [2021-03-10 22:11:41,478 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:41,478 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 329 transitions. [2021-03-10 22:11:41,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:11:41,478 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:41,478 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:41,678 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 376 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20873 [2021-03-10 22:11:41,678 INFO L428 AbstractCegarLoop]: === Iteration 382 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:41,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:41,678 INFO L82 PathProgramCache]: Analyzing trace with hash -3107581, now seen corresponding path program 376 times [2021-03-10 22:11:41,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:41,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997482624] [2021-03-10 22:11:41,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:41,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:41,789 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:41,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997482624] [2021-03-10 22:11:41,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226779719] [2021-03-10 22:11:41,790 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:41,881 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:11:41,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:41,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:11:41,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:42,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:11:42,121 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:42,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:11:42,125 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:42,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:42,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:42,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:11:42,130 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:42,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:42,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:11:42,134 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:42,184 INFO L628 ElimStorePlain]: treesize reduction 64, result has 34.0 percent of original size [2021-03-10 22:11:42,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:11:42,187 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:42,219 INFO L628 ElimStorePlain]: treesize reduction 1, result has 96.6 percent of original size [2021-03-10 22:11:42,220 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:11:42,220 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:140, output treesize:12 [2021-03-10 22:11:42,253 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:42,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:42,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:11:42,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911566583] [2021-03-10 22:11:42,254 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:11:42,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:42,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:11:42,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:11:42,254 INFO L87 Difference]: Start difference. First operand 156 states and 329 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:42,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:42,577 INFO L93 Difference]: Finished difference Result 199 states and 415 transitions. [2021-03-10 22:11:42,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:11:42,578 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:11:42,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:42,578 INFO L225 Difference]: With dead ends: 199 [2021-03-10 22:11:42,578 INFO L226 Difference]: Without dead ends: 199 [2021-03-10 22:11:42,578 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 396.5ms TimeCoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:11:42,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-03-10 22:11:42,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 156. [2021-03-10 22:11:42,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.1225806451612903) internal successors, (329), 155 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) [2021-03-10 22:11:42,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 329 transitions. [2021-03-10 22:11:42,580 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 329 transitions. Word has length 19 [2021-03-10 22:11:42,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:42,580 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 329 transitions. [2021-03-10 22:11:42,580 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:42,580 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 329 transitions. [2021-03-10 22:11:42,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:11:42,580 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:42,580 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:42,780 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 377 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20897 [2021-03-10 22:11:42,780 INFO L428 AbstractCegarLoop]: === Iteration 383 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:42,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:42,781 INFO L82 PathProgramCache]: Analyzing trace with hash -450445304, now seen corresponding path program 377 times [2021-03-10 22:11:42,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:42,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339906012] [2021-03-10 22:11:42,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:42,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:42,893 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:42,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339906012] [2021-03-10 22:11:42,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160289986] [2021-03-10 22:11:42,894 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:42,990 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 22:11:42,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:42,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:11:42,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:43,243 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:43,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:43,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:11:43,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509680104] [2021-03-10 22:11:43,244 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:11:43,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:43,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:11:43,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:11:43,244 INFO L87 Difference]: Start difference. First operand 156 states and 329 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:43,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:43,485 INFO L93 Difference]: Finished difference Result 170 states and 358 transitions. [2021-03-10 22:11:43,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:11:43,486 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:11:43,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:43,486 INFO L225 Difference]: With dead ends: 170 [2021-03-10 22:11:43,486 INFO L226 Difference]: Without dead ends: 170 [2021-03-10 22:11:43,487 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 290.9ms TimeCoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:11:43,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-03-10 22:11:43,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 155. [2021-03-10 22:11:43,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.1233766233766236) internal successors, (327), 154 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:43,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 327 transitions. [2021-03-10 22:11:43,488 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 327 transitions. Word has length 19 [2021-03-10 22:11:43,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:43,488 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 327 transitions. [2021-03-10 22:11:43,488 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:43,488 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 327 transitions. [2021-03-10 22:11:43,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:11:43,488 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:43,488 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:43,702 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20934,378 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:43,702 INFO L428 AbstractCegarLoop]: === Iteration 384 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:43,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:43,703 INFO L82 PathProgramCache]: Analyzing trace with hash -2011609167, now seen corresponding path program 378 times [2021-03-10 22:11:43,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:43,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183128135] [2021-03-10 22:11:43,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:43,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:43,814 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:43,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183128135] [2021-03-10 22:11:43,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810829521] [2021-03-10 22:11:43,814 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:43,907 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 22:11:43,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:43,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:11:43,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:44,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:44,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:44,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:11:44,153 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:44,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:11:44,157 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:44,234 INFO L628 ElimStorePlain]: treesize reduction 51, result has 51.4 percent of original size [2021-03-10 22:11:44,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:11:44,239 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:44,267 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:11:44,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:11:44,271 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:44,298 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:11:44,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:11:44,302 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:44,327 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:11:44,328 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:11:44,329 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 7 variables, input treesize:128, output treesize:13 [2021-03-10 22:11:44,371 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:44,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:44,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:11:44,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288399109] [2021-03-10 22:11:44,371 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:11:44,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:44,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:11:44,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:11:44,371 INFO L87 Difference]: Start difference. First operand 155 states and 327 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:44,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:44,575 INFO L93 Difference]: Finished difference Result 188 states and 387 transitions. [2021-03-10 22:11:44,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:11:44,576 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:11:44,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:44,576 INFO L225 Difference]: With dead ends: 188 [2021-03-10 22:11:44,576 INFO L226 Difference]: Without dead ends: 188 [2021-03-10 22:11:44,576 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 312.1ms TimeCoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:11:44,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-03-10 22:11:44,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 155. [2021-03-10 22:11:44,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.1233766233766236) internal successors, (327), 154 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:44,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 327 transitions. [2021-03-10 22:11:44,577 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 327 transitions. Word has length 19 [2021-03-10 22:11:44,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:44,578 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 327 transitions. [2021-03-10 22:11:44,578 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:44,578 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 327 transitions. [2021-03-10 22:11:44,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:11:44,578 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:44,578 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:44,791 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20970,379 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:44,791 INFO L428 AbstractCegarLoop]: === Iteration 385 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:44,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:44,791 INFO L82 PathProgramCache]: Analyzing trace with hash 137300018, now seen corresponding path program 379 times [2021-03-10 22:11:44,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:44,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164798507] [2021-03-10 22:11:44,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:44,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:44,912 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:44,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164798507] [2021-03-10 22:11:44,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967154991] [2021-03-10 22:11:44,912 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:45,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:45,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:11:45,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:45,324 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:45,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:45,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:11:45,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560355242] [2021-03-10 22:11:45,325 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:11:45,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:45,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:11:45,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:11:45,325 INFO L87 Difference]: Start difference. First operand 155 states and 327 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:45,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:45,607 INFO L93 Difference]: Finished difference Result 225 states and 458 transitions. [2021-03-10 22:11:45,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:11:45,607 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:11:45,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:45,608 INFO L225 Difference]: With dead ends: 225 [2021-03-10 22:11:45,608 INFO L226 Difference]: Without dead ends: 225 [2021-03-10 22:11:45,608 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 299.1ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:11:45,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-03-10 22:11:45,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 158. [2021-03-10 22:11:45,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.1464968152866244) internal successors, (337), 157 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:45,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 337 transitions. [2021-03-10 22:11:45,611 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 337 transitions. Word has length 19 [2021-03-10 22:11:45,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:45,611 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 337 transitions. [2021-03-10 22:11:45,611 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:45,611 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 337 transitions. [2021-03-10 22:11:45,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:11:45,611 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:45,611 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:45,812 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 380 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20994 [2021-03-10 22:11:45,812 INFO L428 AbstractCegarLoop]: === Iteration 386 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:45,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:45,812 INFO L82 PathProgramCache]: Analyzing trace with hash -397929784, now seen corresponding path program 380 times [2021-03-10 22:11:45,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:45,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251659991] [2021-03-10 22:11:45,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:45,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:45,922 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:45,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251659991] [2021-03-10 22:11:45,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244224330] [2021-03-10 22:11:45,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 22:11:46,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:11:46,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:46,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:11:46,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:46,238 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:46,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:46,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:11:46,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450005357] [2021-03-10 22:11:46,238 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:11:46,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:46,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:11:46,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:11:46,238 INFO L87 Difference]: Start difference. First operand 158 states and 337 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:46,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:46,567 INFO L93 Difference]: Finished difference Result 186 states and 390 transitions. [2021-03-10 22:11:46,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:11:46,568 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:11:46,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:46,568 INFO L225 Difference]: With dead ends: 186 [2021-03-10 22:11:46,568 INFO L226 Difference]: Without dead ends: 186 [2021-03-10 22:11:46,568 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 280.9ms TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:11:46,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-03-10 22:11:46,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 156. [2021-03-10 22:11:46,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.129032258064516) internal successors, (330), 155 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:46,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 330 transitions. [2021-03-10 22:11:46,569 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 330 transitions. Word has length 19 [2021-03-10 22:11:46,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:46,569 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 330 transitions. [2021-03-10 22:11:46,569 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:46,569 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 330 transitions. [2021-03-10 22:11:46,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:11:46,570 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:46,570 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:46,770 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 381 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21040 [2021-03-10 22:11:46,770 INFO L428 AbstractCegarLoop]: === Iteration 387 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:46,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:46,770 INFO L82 PathProgramCache]: Analyzing trace with hash -762650319, now seen corresponding path program 381 times [2021-03-10 22:11:46,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:46,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014508250] [2021-03-10 22:11:46,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:46,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:46,878 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:46,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014508250] [2021-03-10 22:11:46,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301477202] [2021-03-10 22:11:46,878 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:46,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 22:11:46,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:46,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:11:46,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:47,256 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:47,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:47,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:11:47,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350246094] [2021-03-10 22:11:47,256 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:11:47,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:47,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:11:47,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:11:47,257 INFO L87 Difference]: Start difference. First operand 156 states and 330 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:47,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:47,550 INFO L93 Difference]: Finished difference Result 165 states and 344 transitions. [2021-03-10 22:11:47,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:11:47,550 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:11:47,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:47,551 INFO L225 Difference]: With dead ends: 165 [2021-03-10 22:11:47,551 INFO L226 Difference]: Without dead ends: 161 [2021-03-10 22:11:47,551 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 330.0ms TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:11:47,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-03-10 22:11:47,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 152. [2021-03-10 22:11:47,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.1258278145695364) internal successors, (321), 151 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:47,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 321 transitions. [2021-03-10 22:11:47,552 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 321 transitions. Word has length 19 [2021-03-10 22:11:47,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:47,552 INFO L480 AbstractCegarLoop]: Abstraction has 152 states and 321 transitions. [2021-03-10 22:11:47,552 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:47,552 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 321 transitions. [2021-03-10 22:11:47,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:11:47,552 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:47,552 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:47,753 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21060,382 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:47,753 INFO L428 AbstractCegarLoop]: === Iteration 388 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:47,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:47,753 INFO L82 PathProgramCache]: Analyzing trace with hash 295570755, now seen corresponding path program 382 times [2021-03-10 22:11:47,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:47,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576457621] [2021-03-10 22:11:47,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:47,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:47,858 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:47,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576457621] [2021-03-10 22:11:47,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654423513] [2021-03-10 22:11:47,858 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:47,951 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:11:47,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:47,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:11:47,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:48,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:48,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:48,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:11:48,187 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:48,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:48,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:11:48,191 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:48,214 INFO L628 ElimStorePlain]: treesize reduction 25, result has 41.9 percent of original size [2021-03-10 22:11:48,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:11:48,217 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:48,223 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:11:48,224 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:11:48,224 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:71, output treesize:6 [2021-03-10 22:11:48,231 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:48,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:48,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:11:48,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630775410] [2021-03-10 22:11:48,232 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:11:48,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:48,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:11:48,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:11:48,232 INFO L87 Difference]: Start difference. First operand 152 states and 321 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:48,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:48,562 INFO L93 Difference]: Finished difference Result 181 states and 379 transitions. [2021-03-10 22:11:48,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:11:48,562 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:11:48,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:48,563 INFO L225 Difference]: With dead ends: 181 [2021-03-10 22:11:48,563 INFO L226 Difference]: Without dead ends: 181 [2021-03-10 22:11:48,563 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 312.7ms TimeCoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:11:48,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-03-10 22:11:48,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 153. [2021-03-10 22:11:48,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.125) internal successors, (323), 152 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:48,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 323 transitions. [2021-03-10 22:11:48,564 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 323 transitions. Word has length 19 [2021-03-10 22:11:48,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:48,564 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 323 transitions. [2021-03-10 22:11:48,564 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:48,564 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 323 transitions. [2021-03-10 22:11:48,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:11:48,564 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:48,564 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:48,765 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 383 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21085 [2021-03-10 22:11:48,765 INFO L428 AbstractCegarLoop]: === Iteration 389 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:48,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:48,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1089606991, now seen corresponding path program 383 times [2021-03-10 22:11:48,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:48,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416256592] [2021-03-10 22:11:48,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:48,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:48,873 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:48,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416256592] [2021-03-10 22:11:48,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940695793] [2021-03-10 22:11:48,873 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:48,975 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 22:11:48,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:48,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:11:48,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:49,237 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:49,238 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:49,240 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:49,241 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:49,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:49,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:49,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:11:49,245 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:49,248 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:49,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:11:49,249 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:49,264 INFO L628 ElimStorePlain]: treesize reduction 4, result has 81.8 percent of original size [2021-03-10 22:11:49,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:11:49,267 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:49,273 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:11:49,274 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:11:49,274 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:114, output treesize:6 [2021-03-10 22:11:49,281 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:49,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:49,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:11:49,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502386304] [2021-03-10 22:11:49,281 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:11:49,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:49,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:11:49,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:11:49,282 INFO L87 Difference]: Start difference. First operand 153 states and 323 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:49,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:49,742 INFO L93 Difference]: Finished difference Result 200 states and 417 transitions. [2021-03-10 22:11:49,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:11:49,743 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:11:49,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:49,743 INFO L225 Difference]: With dead ends: 200 [2021-03-10 22:11:49,743 INFO L226 Difference]: Without dead ends: 200 [2021-03-10 22:11:49,743 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 461.2ms TimeCoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2021-03-10 22:11:49,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-03-10 22:11:49,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 154. [2021-03-10 22:11:49,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.1241830065359477) internal successors, (325), 153 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:49,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 325 transitions. [2021-03-10 22:11:49,745 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 325 transitions. Word has length 19 [2021-03-10 22:11:49,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:49,745 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 325 transitions. [2021-03-10 22:11:49,745 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:49,745 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 325 transitions. [2021-03-10 22:11:49,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:11:49,745 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:49,745 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:49,946 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 384 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21111 [2021-03-10 22:11:49,946 INFO L428 AbstractCegarLoop]: === Iteration 390 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:49,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:49,946 INFO L82 PathProgramCache]: Analyzing trace with hash -405401081, now seen corresponding path program 384 times [2021-03-10 22:11:49,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:49,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375624165] [2021-03-10 22:11:49,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:49,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:50,072 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:50,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375624165] [2021-03-10 22:11:50,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955286416] [2021-03-10 22:11:50,072 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:50,175 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 22:11:50,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:50,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:11:50,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:50,574 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:50,575 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:50,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:50,579 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:50,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:11:50,581 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:50,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:11:50,586 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:50,590 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:50,591 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:50,594 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:50,595 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:50,598 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:50,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:50,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:11:50,601 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:50,603 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:50,604 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:50,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:11:50,609 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:50,660 INFO L628 ElimStorePlain]: treesize reduction 25, result has 56.9 percent of original size [2021-03-10 22:11:50,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:11:50,664 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:50,701 INFO L628 ElimStorePlain]: treesize reduction 1, result has 96.6 percent of original size [2021-03-10 22:11:50,702 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:11:50,702 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 3 variables, input treesize:199, output treesize:12 [2021-03-10 22:11:50,738 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:50,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:50,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:11:50,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153385005] [2021-03-10 22:11:50,739 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:11:50,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:50,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:11:50,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:11:50,739 INFO L87 Difference]: Start difference. First operand 154 states and 325 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:51,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:51,325 INFO L93 Difference]: Finished difference Result 209 states and 436 transitions. [2021-03-10 22:11:51,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:11:51,326 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:11:51,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:51,326 INFO L225 Difference]: With dead ends: 209 [2021-03-10 22:11:51,326 INFO L226 Difference]: Without dead ends: 209 [2021-03-10 22:11:51,326 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 590.2ms TimeCoverageRelationStatistics Valid=142, Invalid=670, Unknown=0, NotChecked=0, Total=812 [2021-03-10 22:11:51,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-03-10 22:11:51,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 154. [2021-03-10 22:11:51,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.1241830065359477) internal successors, (325), 153 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:51,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 325 transitions. [2021-03-10 22:11:51,327 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 325 transitions. Word has length 19 [2021-03-10 22:11:51,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:51,328 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 325 transitions. [2021-03-10 22:11:51,328 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:51,328 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 325 transitions. [2021-03-10 22:11:51,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:11:51,328 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:51,328 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:51,528 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 385 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21148 [2021-03-10 22:11:51,528 INFO L428 AbstractCegarLoop]: === Iteration 391 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:51,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:51,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1743508104, now seen corresponding path program 385 times [2021-03-10 22:11:51,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:51,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921415480] [2021-03-10 22:11:51,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:51,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:51,647 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:51,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921415480] [2021-03-10 22:11:51,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509882847] [2021-03-10 22:11:51,647 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:51,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:51,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:11:51,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:52,058 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:52,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:52,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:11:52,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512886867] [2021-03-10 22:11:52,058 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:11:52,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:52,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:11:52,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:11:52,058 INFO L87 Difference]: Start difference. First operand 154 states and 325 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:52,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:52,361 INFO L93 Difference]: Finished difference Result 172 states and 362 transitions. [2021-03-10 22:11:52,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:11:52,362 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:11:52,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:52,362 INFO L225 Difference]: With dead ends: 172 [2021-03-10 22:11:52,362 INFO L226 Difference]: Without dead ends: 172 [2021-03-10 22:11:52,362 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 413.1ms TimeCoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:11:52,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-03-10 22:11:52,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 152. [2021-03-10 22:11:52,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.1258278145695364) internal successors, (321), 151 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:52,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 321 transitions. [2021-03-10 22:11:52,363 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 321 transitions. Word has length 19 [2021-03-10 22:11:52,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:52,363 INFO L480 AbstractCegarLoop]: Abstraction has 152 states and 321 transitions. [2021-03-10 22:11:52,363 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:52,363 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 321 transitions. [2021-03-10 22:11:52,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:11:52,364 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:52,364 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:52,564 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 386 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21225 [2021-03-10 22:11:52,564 INFO L428 AbstractCegarLoop]: === Iteration 392 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:52,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:52,564 INFO L82 PathProgramCache]: Analyzing trace with hash -49371193, now seen corresponding path program 386 times [2021-03-10 22:11:52,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:52,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440058808] [2021-03-10 22:11:52,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:52,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:52,675 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:52,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440058808] [2021-03-10 22:11:52,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744129321] [2021-03-10 22:11:52,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:52,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:11:52,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:52,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:11:52,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:53,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:53,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:53,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:11:53,028 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:53,030 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:53,031 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:53,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:53,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:53,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:11:53,035 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:53,037 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:53,038 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:53,053 INFO L628 ElimStorePlain]: treesize reduction 4, result has 81.8 percent of original size [2021-03-10 22:11:53,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:11:53,056 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:53,062 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:11:53,063 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:11:53,063 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:114, output treesize:6 [2021-03-10 22:11:53,070 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:53,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:53,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:11:53,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482364095] [2021-03-10 22:11:53,071 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:11:53,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:53,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:11:53,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:11:53,071 INFO L87 Difference]: Start difference. First operand 152 states and 321 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:53,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:53,305 INFO L93 Difference]: Finished difference Result 183 states and 383 transitions. [2021-03-10 22:11:53,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:11:53,306 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:11:53,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:53,306 INFO L225 Difference]: With dead ends: 183 [2021-03-10 22:11:53,306 INFO L226 Difference]: Without dead ends: 183 [2021-03-10 22:11:53,306 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 320.1ms TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:11:53,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-03-10 22:11:53,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 153. [2021-03-10 22:11:53,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.125) internal successors, (323), 152 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:53,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 323 transitions. [2021-03-10 22:11:53,307 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 323 transitions. Word has length 19 [2021-03-10 22:11:53,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:53,308 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 323 transitions. [2021-03-10 22:11:53,308 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:53,308 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 323 transitions. [2021-03-10 22:11:53,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:11:53,308 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:53,308 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:53,508 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 387 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21249 [2021-03-10 22:11:53,508 INFO L428 AbstractCegarLoop]: === Iteration 393 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:53,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:53,508 INFO L82 PathProgramCache]: Analyzing trace with hash 634834717, now seen corresponding path program 387 times [2021-03-10 22:11:53,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:53,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428332602] [2021-03-10 22:11:53,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:53,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:53,620 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:53,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428332602] [2021-03-10 22:11:53,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512242361] [2021-03-10 22:11:53,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:53,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 22:11:53,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:53,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:11:53,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:54,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:54,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:54,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:11:54,044 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:54,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:11:54,048 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:54,051 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:54,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:54,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:11:54,053 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:54,056 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:54,057 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:54,059 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:54,060 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:54,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:11:54,064 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:54,066 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:54,067 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:54,069 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:11:54,070 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:54,146 INFO L628 ElimStorePlain]: treesize reduction 25, result has 56.9 percent of original size [2021-03-10 22:11:54,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:11:54,149 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:54,182 INFO L628 ElimStorePlain]: treesize reduction 1, result has 96.6 percent of original size [2021-03-10 22:11:54,183 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:11:54,183 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 3 variables, input treesize:199, output treesize:12 [2021-03-10 22:11:54,216 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:54,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:54,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:11:54,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131693878] [2021-03-10 22:11:54,216 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:11:54,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:54,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:11:54,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:11:54,216 INFO L87 Difference]: Start difference. First operand 153 states and 323 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:54,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:54,613 INFO L93 Difference]: Finished difference Result 202 states and 422 transitions. [2021-03-10 22:11:54,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:11:54,614 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:11:54,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:54,614 INFO L225 Difference]: With dead ends: 202 [2021-03-10 22:11:54,614 INFO L226 Difference]: Without dead ends: 202 [2021-03-10 22:11:54,614 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 435.0ms TimeCoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2021-03-10 22:11:54,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-03-10 22:11:54,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 153. [2021-03-10 22:11:54,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.125) internal successors, (323), 152 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:54,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 323 transitions. [2021-03-10 22:11:54,616 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 323 transitions. Word has length 19 [2021-03-10 22:11:54,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:54,616 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 323 transitions. [2021-03-10 22:11:54,616 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:54,616 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 323 transitions. [2021-03-10 22:11:54,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:11:54,616 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:54,616 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:54,816 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 388 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21286 [2021-03-10 22:11:54,817 INFO L428 AbstractCegarLoop]: === Iteration 394 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:54,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:54,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1511223394, now seen corresponding path program 388 times [2021-03-10 22:11:54,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:54,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549358203] [2021-03-10 22:11:54,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:54,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:54,930 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:54,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549358203] [2021-03-10 22:11:54,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748281516] [2021-03-10 22:11:54,930 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:55,024 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:11:55,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:55,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:11:55,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:55,327 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:55,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:55,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:11:55,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230528274] [2021-03-10 22:11:55,328 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:11:55,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:55,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:11:55,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:11:55,328 INFO L87 Difference]: Start difference. First operand 153 states and 323 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:55,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:55,634 INFO L93 Difference]: Finished difference Result 167 states and 352 transitions. [2021-03-10 22:11:55,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:11:55,635 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:11:55,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:55,635 INFO L225 Difference]: With dead ends: 167 [2021-03-10 22:11:55,635 INFO L226 Difference]: Without dead ends: 167 [2021-03-10 22:11:55,635 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 340.4ms TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:11:55,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-03-10 22:11:55,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 152. [2021-03-10 22:11:55,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.1258278145695364) internal successors, (321), 151 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:55,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 321 transitions. [2021-03-10 22:11:55,636 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 321 transitions. Word has length 19 [2021-03-10 22:11:55,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:55,636 INFO L480 AbstractCegarLoop]: Abstraction has 152 states and 321 transitions. [2021-03-10 22:11:55,636 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:55,636 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 321 transitions. [2021-03-10 22:11:55,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:11:55,637 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:55,637 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:55,837 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 389 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21358 [2021-03-10 22:11:55,837 INFO L428 AbstractCegarLoop]: === Iteration 395 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:55,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:55,837 INFO L82 PathProgramCache]: Analyzing trace with hash -476140349, now seen corresponding path program 389 times [2021-03-10 22:11:55,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:55,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329310005] [2021-03-10 22:11:55,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:55,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:55,966 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:55,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329310005] [2021-03-10 22:11:55,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930616102] [2021-03-10 22:11:55,966 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:56,064 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:11:56,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:56,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:11:56,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:56,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:11:56,306 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:56,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:11:56,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:11:56,311 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:56,388 INFO L628 ElimStorePlain]: treesize reduction 51, result has 51.4 percent of original size [2021-03-10 22:11:56,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:11:56,392 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:56,421 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:11:56,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:11:56,425 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:56,452 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:11:56,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:11:56,456 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:11:56,482 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:11:56,483 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:11:56,483 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 7 variables, input treesize:128, output treesize:13 [2021-03-10 22:11:56,526 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:56,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:56,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:11:56,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995060442] [2021-03-10 22:11:56,527 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:11:56,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:56,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:11:56,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:11:56,527 INFO L87 Difference]: Start difference. First operand 152 states and 321 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:56,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:56,746 INFO L93 Difference]: Finished difference Result 183 states and 375 transitions. [2021-03-10 22:11:56,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:11:56,747 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:11:56,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:56,747 INFO L225 Difference]: With dead ends: 183 [2021-03-10 22:11:56,748 INFO L226 Difference]: Without dead ends: 183 [2021-03-10 22:11:56,748 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 292.8ms TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:11:56,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-03-10 22:11:56,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 154. [2021-03-10 22:11:56,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.130718954248366) internal successors, (326), 153 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:56,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 326 transitions. [2021-03-10 22:11:56,749 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 326 transitions. Word has length 19 [2021-03-10 22:11:56,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:56,749 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 326 transitions. [2021-03-10 22:11:56,749 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:56,749 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 326 transitions. [2021-03-10 22:11:56,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:11:56,749 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:56,749 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:56,949 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 390 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21405 [2021-03-10 22:11:56,950 INFO L428 AbstractCegarLoop]: === Iteration 396 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:56,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:56,950 INFO L82 PathProgramCache]: Analyzing trace with hash 775242316, now seen corresponding path program 390 times [2021-03-10 22:11:56,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:56,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816553318] [2021-03-10 22:11:56,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:56,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:57,063 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:57,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816553318] [2021-03-10 22:11:57,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434682036] [2021-03-10 22:11:57,064 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 22:11:57,158 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 22:11:57,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:57,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:11:57,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:57,473 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:57,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:57,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:11:57,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555629019] [2021-03-10 22:11:57,474 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:11:57,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:57,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:11:57,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:11:57,474 INFO L87 Difference]: Start difference. First operand 154 states and 326 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:57,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:57,779 INFO L93 Difference]: Finished difference Result 223 states and 455 transitions. [2021-03-10 22:11:57,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:11:57,780 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:11:57,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:57,780 INFO L225 Difference]: With dead ends: 223 [2021-03-10 22:11:57,780 INFO L226 Difference]: Without dead ends: 223 [2021-03-10 22:11:57,780 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 284.6ms TimeCoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:11:57,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-03-10 22:11:57,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 155. [2021-03-10 22:11:57,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.1493506493506493) internal successors, (331), 154 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) [2021-03-10 22:11:57,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 331 transitions. [2021-03-10 22:11:57,781 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 331 transitions. Word has length 19 [2021-03-10 22:11:57,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:57,781 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 331 transitions. [2021-03-10 22:11:57,782 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:57,782 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 331 transitions. [2021-03-10 22:11:57,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:11:57,782 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:57,782 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:57,982 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 391 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21425 [2021-03-10 22:11:57,982 INFO L428 AbstractCegarLoop]: === Iteration 397 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:57,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:57,982 INFO L82 PathProgramCache]: Analyzing trace with hash -1458707874, now seen corresponding path program 391 times [2021-03-10 22:11:57,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:57,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396877657] [2021-03-10 22:11:57,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:57,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:58,094 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:58,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396877657] [2021-03-10 22:11:58,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862637555] [2021-03-10 22:11:58,095 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:58,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:58,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:11:58,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:58,393 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:58,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:58,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:11:58,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908828954] [2021-03-10 22:11:58,393 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:11:58,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:58,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:11:58,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:11:58,393 INFO L87 Difference]: Start difference. First operand 155 states and 331 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:58,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:58,683 INFO L93 Difference]: Finished difference Result 183 states and 384 transitions. [2021-03-10 22:11:58,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:11:58,683 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:11:58,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:58,683 INFO L225 Difference]: With dead ends: 183 [2021-03-10 22:11:58,684 INFO L226 Difference]: Without dead ends: 183 [2021-03-10 22:11:58,684 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 278.9ms TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:11:58,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-03-10 22:11:58,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 153. [2021-03-10 22:11:58,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.1315789473684212) internal successors, (324), 152 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:58,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 324 transitions. [2021-03-10 22:11:58,685 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 324 transitions. Word has length 19 [2021-03-10 22:11:58,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:58,685 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 324 transitions. [2021-03-10 22:11:58,685 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:58,685 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 324 transitions. [2021-03-10 22:11:58,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:11:58,685 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:58,685 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:58,885 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 392 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21470 [2021-03-10 22:11:58,886 INFO L428 AbstractCegarLoop]: === Iteration 398 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:58,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:58,886 INFO L82 PathProgramCache]: Analyzing trace with hash -1823428409, now seen corresponding path program 392 times [2021-03-10 22:11:58,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:58,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974529204] [2021-03-10 22:11:58,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:58,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:11:58,996 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:58,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974529204] [2021-03-10 22:11:58,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891891901] [2021-03-10 22:11:58,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:59,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:11:59,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:11:59,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:11:59,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:11:59,393 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:11:59,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:11:59,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:11:59,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043056926] [2021-03-10 22:11:59,393 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:11:59,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:11:59,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:11:59,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:11:59,394 INFO L87 Difference]: Start difference. First operand 153 states and 324 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:59,695 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 27 [2021-03-10 22:11:59,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:11:59,706 INFO L93 Difference]: Finished difference Result 162 states and 338 transitions. [2021-03-10 22:11:59,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:11:59,706 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:11:59,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:11:59,707 INFO L225 Difference]: With dead ends: 162 [2021-03-10 22:11:59,707 INFO L226 Difference]: Without dead ends: 158 [2021-03-10 22:11:59,707 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 403.0ms TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:11:59,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-03-10 22:11:59,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 150. [2021-03-10 22:11:59,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.12751677852349) internal successors, (317), 149 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:59,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 317 transitions. [2021-03-10 22:11:59,708 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 317 transitions. Word has length 19 [2021-03-10 22:11:59,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:11:59,708 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 317 transitions. [2021-03-10 22:11:59,708 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:11:59,708 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 317 transitions. [2021-03-10 22:11:59,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:11:59,708 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:11:59,708 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:11:59,909 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21486,393 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:11:59,909 INFO L428 AbstractCegarLoop]: === Iteration 399 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:11:59,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:11:59,909 INFO L82 PathProgramCache]: Analyzing trace with hash 2133167473, now seen corresponding path program 393 times [2021-03-10 22:11:59,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:11:59,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981082764] [2021-03-10 22:11:59,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:11:59,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:12:00,018 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:00,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981082764] [2021-03-10 22:12:00,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673924139] [2021-03-10 22:12:00,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:00,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:12:00,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:12:00,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:12:00,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:12:00,365 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:12:00,366 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:00,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:00,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:00,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:12:00,372 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:00,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:00,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:00,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:12:00,377 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:00,379 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:12:00,380 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:00,396 INFO L628 ElimStorePlain]: treesize reduction 4, result has 81.8 percent of original size [2021-03-10 22:12:00,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:12:00,399 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:00,405 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:12:00,406 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:12:00,406 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:114, output treesize:6 [2021-03-10 22:12:00,413 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:00,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:12:00,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:12:00,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914894986] [2021-03-10 22:12:00,414 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:12:00,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:12:00,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:12:00,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:12:00,414 INFO L87 Difference]: Start difference. First operand 150 states and 317 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:00,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:12:00,701 INFO L93 Difference]: Finished difference Result 192 states and 401 transitions. [2021-03-10 22:12:00,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:12:00,702 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:12:00,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:12:00,702 INFO L225 Difference]: With dead ends: 192 [2021-03-10 22:12:00,702 INFO L226 Difference]: Without dead ends: 192 [2021-03-10 22:12:00,702 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 290.7ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:12:00,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-03-10 22:12:00,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 151. [2021-03-10 22:12:00,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.1266666666666665) internal successors, (319), 150 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:00,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 319 transitions. [2021-03-10 22:12:00,704 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 319 transitions. Word has length 19 [2021-03-10 22:12:00,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:12:00,704 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 319 transitions. [2021-03-10 22:12:00,704 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:00,704 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 319 transitions. [2021-03-10 22:12:00,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:12:00,704 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:12:00,704 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:12:00,904 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21508,394 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:00,905 INFO L428 AbstractCegarLoop]: === Iteration 400 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:12:00,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:12:00,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1477593913, now seen corresponding path program 394 times [2021-03-10 22:12:00,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:12:00,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866272946] [2021-03-10 22:12:00,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:12:00,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:12:01,018 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:01,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866272946] [2021-03-10 22:12:01,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730380195] [2021-03-10 22:12:01,019 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:01,113 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:12:01,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:12:01,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:12:01,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:12:01,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:12:01,497 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:01,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:12:01,501 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:01,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:12:01,505 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:01,508 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:12:01,509 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:01,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:01,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:01,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:12:01,514 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:01,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:01,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:01,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:12:01,519 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:01,521 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:12:01,522 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:01,524 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:12:01,525 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:01,574 INFO L628 ElimStorePlain]: treesize reduction 44, result has 42.9 percent of original size [2021-03-10 22:12:01,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:12:01,578 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:01,611 INFO L628 ElimStorePlain]: treesize reduction 1, result has 96.6 percent of original size [2021-03-10 22:12:01,612 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:12:01,612 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 3 variables, input treesize:199, output treesize:12 [2021-03-10 22:12:01,645 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:01,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:12:01,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:12:01,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846789275] [2021-03-10 22:12:01,645 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:12:01,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:12:01,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:12:01,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:12:01,646 INFO L87 Difference]: Start difference. First operand 151 states and 319 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:02,291 WARN L205 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 11 [2021-03-10 22:12:02,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:12:02,478 INFO L93 Difference]: Finished difference Result 213 states and 444 transitions. [2021-03-10 22:12:02,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:12:02,479 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:12:02,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:12:02,479 INFO L225 Difference]: With dead ends: 213 [2021-03-10 22:12:02,479 INFO L226 Difference]: Without dead ends: 213 [2021-03-10 22:12:02,479 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 758.7ms TimeCoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:12:02,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-03-10 22:12:02,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 151. [2021-03-10 22:12:02,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.1266666666666665) internal successors, (319), 150 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:02,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 319 transitions. [2021-03-10 22:12:02,481 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 319 transitions. Word has length 19 [2021-03-10 22:12:02,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:12:02,481 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 319 transitions. [2021-03-10 22:12:02,481 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:02,481 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 319 transitions. [2021-03-10 22:12:02,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:12:02,481 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:12:02,481 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:12:02,681 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21545,395 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:02,682 INFO L428 AbstractCegarLoop]: === Iteration 401 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:12:02,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:12:02,682 INFO L82 PathProgramCache]: Analyzing trace with hash 671315272, now seen corresponding path program 395 times [2021-03-10 22:12:02,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:12:02,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061514177] [2021-03-10 22:12:02,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:12:02,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:12:02,805 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:02,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061514177] [2021-03-10 22:12:02,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799966718] [2021-03-10 22:12:02,805 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:02,907 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 22:12:02,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:12:02,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:12:02,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:12:03,242 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:03,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:12:03,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:12:03,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658611047] [2021-03-10 22:12:03,242 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:12:03,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:12:03,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:12:03,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:12:03,242 INFO L87 Difference]: Start difference. First operand 151 states and 319 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:03,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:12:03,503 INFO L93 Difference]: Finished difference Result 168 states and 354 transitions. [2021-03-10 22:12:03,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:12:03,504 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:12:03,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:12:03,504 INFO L225 Difference]: With dead ends: 168 [2021-03-10 22:12:03,504 INFO L226 Difference]: Without dead ends: 168 [2021-03-10 22:12:03,504 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 407.2ms TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:12:03,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-03-10 22:12:03,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 150. [2021-03-10 22:12:03,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.12751677852349) internal successors, (317), 149 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:03,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 317 transitions. [2021-03-10 22:12:03,506 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 317 transitions. Word has length 19 [2021-03-10 22:12:03,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:12:03,506 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 317 transitions. [2021-03-10 22:12:03,506 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:03,506 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 317 transitions. [2021-03-10 22:12:03,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:12:03,506 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:12:03,506 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:12:03,706 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 396 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21633 [2021-03-10 22:12:03,707 INFO L428 AbstractCegarLoop]: === Iteration 402 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:12:03,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:12:03,707 INFO L82 PathProgramCache]: Analyzing trace with hash -889848591, now seen corresponding path program 396 times [2021-03-10 22:12:03,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:12:03,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402225153] [2021-03-10 22:12:03,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:12:03,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:12:03,828 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:03,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402225153] [2021-03-10 22:12:03,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124412187] [2021-03-10 22:12:03,828 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:03,931 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 22:12:03,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:12:03,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:12:03,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:12:04,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:12:04,193 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:04,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:04,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:12:04,198 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:04,319 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2021-03-10 22:12:04,320 INFO L628 ElimStorePlain]: treesize reduction 86, result has 48.8 percent of original size [2021-03-10 22:12:04,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:12:04,324 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:04,369 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:12:04,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:12:04,374 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:04,417 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:12:04,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:12:04,421 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:04,462 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:12:04,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:12:04,467 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:04,506 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:12:04,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:12:04,510 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:04,548 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:12:04,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:12:04,552 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:04,589 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:12:04,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:12:04,593 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:04,628 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:12:04,629 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:12:04,629 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:199, output treesize:13 [2021-03-10 22:12:04,672 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:04,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:12:04,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:12:04,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989264315] [2021-03-10 22:12:04,672 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:12:04,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:12:04,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:12:04,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:12:04,672 INFO L87 Difference]: Start difference. First operand 150 states and 317 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:04,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:12:04,972 INFO L93 Difference]: Finished difference Result 184 states and 379 transitions. [2021-03-10 22:12:04,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:12:04,973 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:12:04,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:12:04,973 INFO L225 Difference]: With dead ends: 184 [2021-03-10 22:12:04,973 INFO L226 Difference]: Without dead ends: 184 [2021-03-10 22:12:04,973 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 420.5ms TimeCoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:12:04,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-03-10 22:12:04,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 150. [2021-03-10 22:12:04,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.12751677852349) internal successors, (317), 149 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:04,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 317 transitions. [2021-03-10 22:12:04,974 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 317 transitions. Word has length 19 [2021-03-10 22:12:04,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:12:04,975 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 317 transitions. [2021-03-10 22:12:04,975 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:04,975 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 317 transitions. [2021-03-10 22:12:04,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:12:04,975 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:12:04,975 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:12:05,189 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 397 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21662 [2021-03-10 22:12:05,189 INFO L428 AbstractCegarLoop]: === Iteration 403 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:12:05,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:12:05,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1259060594, now seen corresponding path program 397 times [2021-03-10 22:12:05,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:12:05,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638947998] [2021-03-10 22:12:05,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:12:05,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:12:05,302 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:05,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638947998] [2021-03-10 22:12:05,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208978426] [2021-03-10 22:12:05,302 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 22:12:05,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:12:05,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:12:05,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:12:05,783 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:05,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:12:05,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:12:05,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246140744] [2021-03-10 22:12:05,783 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:12:05,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:12:05,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:12:05,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:12:05,783 INFO L87 Difference]: Start difference. First operand 150 states and 317 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:06,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:12:06,191 INFO L93 Difference]: Finished difference Result 225 states and 460 transitions. [2021-03-10 22:12:06,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:12:06,191 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:12:06,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:12:06,192 INFO L225 Difference]: With dead ends: 225 [2021-03-10 22:12:06,192 INFO L226 Difference]: Without dead ends: 225 [2021-03-10 22:12:06,192 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 432.7ms TimeCoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2021-03-10 22:12:06,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-03-10 22:12:06,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 153. [2021-03-10 22:12:06,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.151315789473684) internal successors, (327), 152 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:06,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 327 transitions. [2021-03-10 22:12:06,193 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 327 transitions. Word has length 19 [2021-03-10 22:12:06,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:12:06,193 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 327 transitions. [2021-03-10 22:12:06,193 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:06,193 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 327 transitions. [2021-03-10 22:12:06,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:12:06,194 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:12:06,194 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:12:06,394 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21683,398 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:06,394 INFO L428 AbstractCegarLoop]: === Iteration 404 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:12:06,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:12:06,394 INFO L82 PathProgramCache]: Analyzing trace with hash 723830792, now seen corresponding path program 398 times [2021-03-10 22:12:06,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:12:06,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422481544] [2021-03-10 22:12:06,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:12:06,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:12:06,504 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:06,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422481544] [2021-03-10 22:12:06,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194917218] [2021-03-10 22:12:06,504 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:06,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:12:06,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:12:06,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:12:06,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:12:06,843 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:06,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:12:06,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:12:06,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33502609] [2021-03-10 22:12:06,844 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:12:06,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:12:06,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:12:06,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:12:06,844 INFO L87 Difference]: Start difference. First operand 153 states and 327 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:07,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:12:07,200 INFO L93 Difference]: Finished difference Result 183 states and 386 transitions. [2021-03-10 22:12:07,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:12:07,201 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:12:07,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:12:07,201 INFO L225 Difference]: With dead ends: 183 [2021-03-10 22:12:07,201 INFO L226 Difference]: Without dead ends: 183 [2021-03-10 22:12:07,202 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 319.0ms TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:12:07,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-03-10 22:12:07,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 151. [2021-03-10 22:12:07,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.1333333333333333) internal successors, (320), 150 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:07,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 320 transitions. [2021-03-10 22:12:07,203 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 320 transitions. Word has length 19 [2021-03-10 22:12:07,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:12:07,203 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 320 transitions. [2021-03-10 22:12:07,203 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:07,203 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 320 transitions. [2021-03-10 22:12:07,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:12:07,203 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:12:07,203 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:12:07,403 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 399 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21747 [2021-03-10 22:12:07,404 INFO L428 AbstractCegarLoop]: === Iteration 405 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:12:07,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:12:07,404 INFO L82 PathProgramCache]: Analyzing trace with hash 359110257, now seen corresponding path program 399 times [2021-03-10 22:12:07,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:12:07,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889023166] [2021-03-10 22:12:07,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:12:07,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:12:07,509 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:07,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889023166] [2021-03-10 22:12:07,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856953638] [2021-03-10 22:12:07,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:07,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 22:12:07,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:12:07,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:12:07,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:12:07,887 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:07,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:12:07,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:12:07,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765666350] [2021-03-10 22:12:07,887 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:12:07,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:12:07,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:12:07,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:12:07,887 INFO L87 Difference]: Start difference. First operand 151 states and 320 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:08,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:12:08,220 INFO L93 Difference]: Finished difference Result 160 states and 334 transitions. [2021-03-10 22:12:08,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:12:08,221 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:12:08,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:12:08,221 INFO L225 Difference]: With dead ends: 160 [2021-03-10 22:12:08,221 INFO L226 Difference]: Without dead ends: 156 [2021-03-10 22:12:08,221 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 405.4ms TimeCoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:12:08,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-03-10 22:12:08,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 149. [2021-03-10 22:12:08,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.1283783783783785) internal successors, (315), 148 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:08,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 315 transitions. [2021-03-10 22:12:08,222 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 315 transitions. Word has length 19 [2021-03-10 22:12:08,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:12:08,222 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 315 transitions. [2021-03-10 22:12:08,223 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:08,223 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 315 transitions. [2021-03-10 22:12:08,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:12:08,223 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:12:08,223 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:12:08,427 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 400 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21775 [2021-03-10 22:12:08,427 INFO L428 AbstractCegarLoop]: === Iteration 406 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:12:08,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:12:08,427 INFO L82 PathProgramCache]: Analyzing trace with hash -1995670904, now seen corresponding path program 400 times [2021-03-10 22:12:08,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:12:08,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503295116] [2021-03-10 22:12:08,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:12:08,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:12:08,540 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:08,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503295116] [2021-03-10 22:12:08,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811972494] [2021-03-10 22:12:08,540 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:08,635 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:12:08,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:12:08,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:12:08,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:12:08,954 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:08,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:12:08,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:12:08,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638681586] [2021-03-10 22:12:08,955 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:12:08,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:12:08,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:12:08,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:12:08,955 INFO L87 Difference]: Start difference. First operand 149 states and 315 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:09,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:12:09,506 INFO L93 Difference]: Finished difference Result 233 states and 474 transitions. [2021-03-10 22:12:09,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 22:12:09,507 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:12:09,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:12:09,507 INFO L225 Difference]: With dead ends: 233 [2021-03-10 22:12:09,507 INFO L226 Difference]: Without dead ends: 233 [2021-03-10 22:12:09,507 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 603.4ms TimeCoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2021-03-10 22:12:09,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-03-10 22:12:09,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 151. [2021-03-10 22:12:09,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.1533333333333333) internal successors, (323), 150 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:09,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 323 transitions. [2021-03-10 22:12:09,509 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 323 transitions. Word has length 19 [2021-03-10 22:12:09,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:12:09,509 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 323 transitions. [2021-03-10 22:12:09,509 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:09,509 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 323 transitions. [2021-03-10 22:12:09,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:12:09,509 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:12:09,509 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:12:09,709 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21798,401 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:09,709 INFO L428 AbstractCegarLoop]: === Iteration 407 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:12:09,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:12:09,710 INFO L82 PathProgramCache]: Analyzing trace with hash 1764066590, now seen corresponding path program 401 times [2021-03-10 22:12:09,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:12:09,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582594794] [2021-03-10 22:12:09,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:12:09,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:12:09,816 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:09,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582594794] [2021-03-10 22:12:09,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368573268] [2021-03-10 22:12:09,816 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:09,913 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 22:12:09,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:12:09,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:12:09,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:12:10,177 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:10,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:12:10,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:12:10,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289888674] [2021-03-10 22:12:10,178 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:12:10,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:12:10,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:12:10,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:12:10,178 INFO L87 Difference]: Start difference. First operand 151 states and 323 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:10,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:12:10,687 INFO L93 Difference]: Finished difference Result 192 states and 401 transitions. [2021-03-10 22:12:10,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:12:10,687 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:12:10,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:12:10,688 INFO L225 Difference]: With dead ends: 192 [2021-03-10 22:12:10,688 INFO L226 Difference]: Without dead ends: 192 [2021-03-10 22:12:10,688 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 487.6ms TimeCoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2021-03-10 22:12:10,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-03-10 22:12:10,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 151. [2021-03-10 22:12:10,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.1533333333333333) internal successors, (323), 150 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:10,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 323 transitions. [2021-03-10 22:12:10,689 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 323 transitions. Word has length 19 [2021-03-10 22:12:10,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:12:10,689 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 323 transitions. [2021-03-10 22:12:10,689 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:10,689 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 323 transitions. [2021-03-10 22:12:10,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:12:10,690 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:12:10,690 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:12:10,897 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 402 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21832 [2021-03-10 22:12:10,897 INFO L428 AbstractCegarLoop]: === Iteration 408 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:12:10,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:12:10,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1399346055, now seen corresponding path program 402 times [2021-03-10 22:12:10,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:12:10,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886934326] [2021-03-10 22:12:10,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:12:10,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:12:10,998 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:10,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886934326] [2021-03-10 22:12:10,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715171170] [2021-03-10 22:12:10,999 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:11,095 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 22:12:11,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:12:11,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:12:11,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:12:11,395 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:11,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:12:11,395 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:12:11,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526373472] [2021-03-10 22:12:11,395 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:12:11,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:12:11,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:12:11,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:12:11,396 INFO L87 Difference]: Start difference. First operand 151 states and 323 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:11,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:12:11,724 INFO L93 Difference]: Finished difference Result 170 states and 355 transitions. [2021-03-10 22:12:11,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:12:11,725 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:12:11,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:12:11,725 INFO L225 Difference]: With dead ends: 170 [2021-03-10 22:12:11,725 INFO L226 Difference]: Without dead ends: 166 [2021-03-10 22:12:11,725 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 434.7ms TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:12:11,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-03-10 22:12:11,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 150. [2021-03-10 22:12:11,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.1476510067114094) internal successors, (320), 149 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:11,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 320 transitions. [2021-03-10 22:12:11,727 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 320 transitions. Word has length 19 [2021-03-10 22:12:11,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:12:11,727 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 320 transitions. [2021-03-10 22:12:11,727 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:11,727 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 320 transitions. [2021-03-10 22:12:11,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:12:11,727 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:12:11,727 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:12:11,927 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 403 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21861 [2021-03-10 22:12:11,927 INFO L428 AbstractCegarLoop]: === Iteration 409 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:12:11,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:12:11,928 INFO L82 PathProgramCache]: Analyzing trace with hash -1943155384, now seen corresponding path program 403 times [2021-03-10 22:12:11,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:12:11,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147410294] [2021-03-10 22:12:11,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:12:11,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:12:12,031 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:12,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147410294] [2021-03-10 22:12:12,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612122326] [2021-03-10 22:12:12,031 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 22:12:12,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:12:12,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:12:12,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:12:12,344 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:12,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:12:12,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:12:12,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014901740] [2021-03-10 22:12:12,344 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:12:12,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:12:12,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:12:12,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:12:12,344 INFO L87 Difference]: Start difference. First operand 150 states and 320 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:12,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:12:12,659 INFO L93 Difference]: Finished difference Result 182 states and 379 transitions. [2021-03-10 22:12:12,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:12:12,660 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:12:12,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:12:12,660 INFO L225 Difference]: With dead ends: 182 [2021-03-10 22:12:12,660 INFO L226 Difference]: Without dead ends: 182 [2021-03-10 22:12:12,660 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 296.9ms TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:12:12,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-03-10 22:12:12,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 147. [2021-03-10 22:12:12,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 2.1232876712328768) internal successors, (310), 146 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) [2021-03-10 22:12:12,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 310 transitions. [2021-03-10 22:12:12,662 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 310 transitions. Word has length 19 [2021-03-10 22:12:12,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:12:12,662 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 310 transitions. [2021-03-10 22:12:12,662 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:12,662 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 310 transitions. [2021-03-10 22:12:12,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:12:12,662 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:12:12,662 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:12:12,862 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21879,404 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:12,862 INFO L428 AbstractCegarLoop]: === Iteration 410 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:12:12,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:12:12,862 INFO L82 PathProgramCache]: Analyzing trace with hash 386653523, now seen corresponding path program 404 times [2021-03-10 22:12:12,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:12:12,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264006394] [2021-03-10 22:12:12,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:12:12,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:12:12,959 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:12,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264006394] [2021-03-10 22:12:12,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515923444] [2021-03-10 22:12:12,959 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:13,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:12:13,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:12:13,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:12:13,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:12:13,411 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:13,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:12:13,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:12:13,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595002526] [2021-03-10 22:12:13,411 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:12:13,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:12:13,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:12:13,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:12:13,411 INFO L87 Difference]: Start difference. First operand 147 states and 310 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:13,736 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 27 [2021-03-10 22:12:13,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:12:13,754 INFO L93 Difference]: Finished difference Result 158 states and 327 transitions. [2021-03-10 22:12:13,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:12:13,754 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:12:13,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:12:13,755 INFO L225 Difference]: With dead ends: 158 [2021-03-10 22:12:13,755 INFO L226 Difference]: Without dead ends: 152 [2021-03-10 22:12:13,755 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 421.0ms TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:12:13,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-03-10 22:12:13,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 143. [2021-03-10 22:12:13,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.119718309859155) internal successors, (301), 142 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:13,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 301 transitions. [2021-03-10 22:12:13,756 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 301 transitions. Word has length 19 [2021-03-10 22:12:13,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:12:13,756 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 301 transitions. [2021-03-10 22:12:13,756 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:13,756 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 301 transitions. [2021-03-10 22:12:13,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:12:13,756 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:12:13,756 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:12:13,957 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 405 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21896 [2021-03-10 22:12:13,957 INFO L428 AbstractCegarLoop]: === Iteration 411 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:12:13,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:12:13,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1771188333, now seen corresponding path program 405 times [2021-03-10 22:12:13,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:12:13,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640740819] [2021-03-10 22:12:13,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:12:13,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:12:14,060 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:14,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640740819] [2021-03-10 22:12:14,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887210985] [2021-03-10 22:12:14,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:14,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 22:12:14,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:12:14,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:12:14,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:12:14,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:14,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:14,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:12:14,388 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:14,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:14,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:12:14,392 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:14,416 INFO L628 ElimStorePlain]: treesize reduction 25, result has 41.9 percent of original size [2021-03-10 22:12:14,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:12:14,419 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:14,425 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:12:14,426 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:12:14,426 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:71, output treesize:6 [2021-03-10 22:12:14,433 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:14,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:12:14,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:12:14,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766294678] [2021-03-10 22:12:14,434 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:12:14,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:12:14,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:12:14,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:12:14,434 INFO L87 Difference]: Start difference. First operand 143 states and 301 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:14,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:12:14,758 INFO L93 Difference]: Finished difference Result 188 states and 391 transitions. [2021-03-10 22:12:14,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:12:14,759 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:12:14,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:12:14,759 INFO L225 Difference]: With dead ends: 188 [2021-03-10 22:12:14,759 INFO L226 Difference]: Without dead ends: 188 [2021-03-10 22:12:14,759 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 314.0ms TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:12:14,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-03-10 22:12:14,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 144. [2021-03-10 22:12:14,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.1188811188811187) internal successors, (303), 143 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:14,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 303 transitions. [2021-03-10 22:12:14,760 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 303 transitions. Word has length 19 [2021-03-10 22:12:14,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:12:14,760 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 303 transitions. [2021-03-10 22:12:14,760 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:14,761 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 303 transitions. [2021-03-10 22:12:14,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:12:14,761 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:12:14,761 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:12:14,961 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21922,406 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:14,961 INFO L428 AbstractCegarLoop]: === Iteration 412 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:12:14,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:12:14,961 INFO L82 PathProgramCache]: Analyzing trace with hash 386010587, now seen corresponding path program 406 times [2021-03-10 22:12:14,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:12:14,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654549371] [2021-03-10 22:12:14,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:12:14,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:12:15,068 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:15,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654549371] [2021-03-10 22:12:15,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571013046] [2021-03-10 22:12:15,068 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:15,163 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:12:15,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:12:15,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:12:15,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:12:15,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:15,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:15,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:12:15,400 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:15,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:15,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:12:15,404 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:15,429 INFO L628 ElimStorePlain]: treesize reduction 25, result has 41.9 percent of original size [2021-03-10 22:12:15,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:12:15,432 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:15,438 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:12:15,439 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:12:15,439 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:79, output treesize:6 [2021-03-10 22:12:15,446 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:15,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:12:15,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:12:15,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402567540] [2021-03-10 22:12:15,447 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:12:15,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:12:15,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:12:15,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:12:15,447 INFO L87 Difference]: Start difference. First operand 144 states and 303 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:15,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:12:15,933 INFO L93 Difference]: Finished difference Result 196 states and 407 transitions. [2021-03-10 22:12:15,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:12:15,934 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:12:15,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:12:15,934 INFO L225 Difference]: With dead ends: 196 [2021-03-10 22:12:15,934 INFO L226 Difference]: Without dead ends: 196 [2021-03-10 22:12:15,934 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 479.2ms TimeCoverageRelationStatistics Valid=113, Invalid=643, Unknown=0, NotChecked=0, Total=756 [2021-03-10 22:12:15,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-03-10 22:12:15,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 145. [2021-03-10 22:12:15,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.1180555555555554) internal successors, (305), 144 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:15,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 305 transitions. [2021-03-10 22:12:15,947 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 305 transitions. Word has length 19 [2021-03-10 22:12:15,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:12:15,948 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 305 transitions. [2021-03-10 22:12:15,948 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:15,948 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 305 transitions. [2021-03-10 22:12:15,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:12:15,948 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:12:15,948 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:12:16,162 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21947,407 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:16,162 INFO L428 AbstractCegarLoop]: === Iteration 413 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:12:16,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:12:16,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1070216497, now seen corresponding path program 407 times [2021-03-10 22:12:16,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:12:16,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502252546] [2021-03-10 22:12:16,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:12:16,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:12:16,271 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:16,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502252546] [2021-03-10 22:12:16,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472767370] [2021-03-10 22:12:16,271 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:16,368 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 22:12:16,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:12:16,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:12:16,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:12:16,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:12:16,747 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:16,750 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:12:16,751 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:16,754 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:12:16,755 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:16,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:12:16,758 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:16,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:12:16,764 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:16,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:16,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:16,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:12:16,769 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:16,772 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:12:16,773 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:16,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:16,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:12:16,778 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:16,834 INFO L628 ElimStorePlain]: treesize reduction 44, result has 42.9 percent of original size [2021-03-10 22:12:16,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:12:16,838 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:16,872 INFO L628 ElimStorePlain]: treesize reduction 1, result has 96.6 percent of original size [2021-03-10 22:12:16,872 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:12:16,873 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 3 variables, input treesize:199, output treesize:12 [2021-03-10 22:12:16,906 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:16,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:12:16,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:12:16,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617727543] [2021-03-10 22:12:16,907 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:12:16,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:12:16,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:12:16,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:12:16,907 INFO L87 Difference]: Start difference. First operand 145 states and 305 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:17,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:12:17,540 INFO L93 Difference]: Finished difference Result 210 states and 436 transitions. [2021-03-10 22:12:17,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 22:12:17,540 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:12:17,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:12:17,541 INFO L225 Difference]: With dead ends: 210 [2021-03-10 22:12:17,541 INFO L226 Difference]: Without dead ends: 210 [2021-03-10 22:12:17,541 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 620.9ms TimeCoverageRelationStatistics Valid=150, Invalid=780, Unknown=0, NotChecked=0, Total=930 [2021-03-10 22:12:17,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-03-10 22:12:17,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 146. [2021-03-10 22:12:17,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.117241379310345) internal successors, (307), 145 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:17,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 307 transitions. [2021-03-10 22:12:17,542 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 307 transitions. Word has length 19 [2021-03-10 22:12:17,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:12:17,542 INFO L480 AbstractCegarLoop]: Abstraction has 146 states and 307 transitions. [2021-03-10 22:12:17,542 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:17,542 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 307 transitions. [2021-03-10 22:12:17,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:12:17,542 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:12:17,542 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:12:17,743 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21969,408 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:17,743 INFO L428 AbstractCegarLoop]: === Iteration 414 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:12:17,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:12:17,743 INFO L82 PathProgramCache]: Analyzing trace with hash -1075841614, now seen corresponding path program 408 times [2021-03-10 22:12:17,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:12:17,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4662069] [2021-03-10 22:12:17,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:12:17,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:12:17,851 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:17,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4662069] [2021-03-10 22:12:17,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386599852] [2021-03-10 22:12:17,851 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 22:12:17,948 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 22:12:17,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:12:17,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:12:17,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:12:18,236 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:18,236 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:12:18,236 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:12:18,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664909699] [2021-03-10 22:12:18,236 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:12:18,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:12:18,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:12:18,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:12:18,236 INFO L87 Difference]: Start difference. First operand 146 states and 307 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:18,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:12:18,541 INFO L93 Difference]: Finished difference Result 172 states and 360 transitions. [2021-03-10 22:12:18,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:12:18,541 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:12:18,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:12:18,542 INFO L225 Difference]: With dead ends: 172 [2021-03-10 22:12:18,542 INFO L226 Difference]: Without dead ends: 172 [2021-03-10 22:12:18,542 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 379.0ms TimeCoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:12:18,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-03-10 22:12:18,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 143. [2021-03-10 22:12:18,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.119718309859155) internal successors, (301), 142 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:18,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 301 transitions. [2021-03-10 22:12:18,543 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 301 transitions. Word has length 19 [2021-03-10 22:12:18,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:12:18,543 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 301 transitions. [2021-03-10 22:12:18,543 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:18,543 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 301 transitions. [2021-03-10 22:12:18,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:12:18,543 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:12:18,543 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:12:18,744 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22050,409 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:18,744 INFO L428 AbstractCegarLoop]: === Iteration 415 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:12:18,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:12:18,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1426246385, now seen corresponding path program 409 times [2021-03-10 22:12:18,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:12:18,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701063270] [2021-03-10 22:12:18,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:12:18,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:12:18,857 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:18,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701063270] [2021-03-10 22:12:18,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475991724] [2021-03-10 22:12:18,857 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:18,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:12:18,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:12:18,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:12:19,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:19,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:19,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:12:19,179 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:19,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:19,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:12:19,183 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:19,207 INFO L628 ElimStorePlain]: treesize reduction 25, result has 41.9 percent of original size [2021-03-10 22:12:19,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:12:19,211 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:19,216 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:12:19,217 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:12:19,217 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:71, output treesize:6 [2021-03-10 22:12:19,225 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:19,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:12:19,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:12:19,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053769723] [2021-03-10 22:12:19,225 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:12:19,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:12:19,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:12:19,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:12:19,226 INFO L87 Difference]: Start difference. First operand 143 states and 301 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:19,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:12:19,515 INFO L93 Difference]: Finished difference Result 186 states and 387 transitions. [2021-03-10 22:12:19,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:12:19,516 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:12:19,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:12:19,516 INFO L225 Difference]: With dead ends: 186 [2021-03-10 22:12:19,516 INFO L226 Difference]: Without dead ends: 186 [2021-03-10 22:12:19,517 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 330.3ms TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:12:19,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-03-10 22:12:19,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 143. [2021-03-10 22:12:19,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.119718309859155) internal successors, (301), 142 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:19,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 301 transitions. [2021-03-10 22:12:19,518 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 301 transitions. Word has length 19 [2021-03-10 22:12:19,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:12:19,518 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 301 transitions. [2021-03-10 22:12:19,518 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:19,518 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 301 transitions. [2021-03-10 22:12:19,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:12:19,518 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:12:19,518 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:12:19,718 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22087,410 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:19,719 INFO L428 AbstractCegarLoop]: === Iteration 416 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:12:19,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:12:19,719 INFO L82 PathProgramCache]: Analyzing trace with hash 411731907, now seen corresponding path program 410 times [2021-03-10 22:12:19,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:12:19,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019808326] [2021-03-10 22:12:19,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:12:19,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:12:19,832 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:19,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019808326] [2021-03-10 22:12:19,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551399556] [2021-03-10 22:12:19,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:19,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:12:19,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:12:19,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:12:19,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:12:20,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:20,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:20,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:12:20,311 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:20,314 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:12:20,315 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:20,318 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:12:20,319 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:20,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:12:20,322 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:20,325 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:12:20,326 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:20,328 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:12:20,329 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:20,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:20,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:20,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:12:20,334 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:20,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:12:20,338 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:20,386 INFO L628 ElimStorePlain]: treesize reduction 25, result has 56.9 percent of original size [2021-03-10 22:12:20,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:12:20,390 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:20,426 INFO L628 ElimStorePlain]: treesize reduction 1, result has 96.6 percent of original size [2021-03-10 22:12:20,427 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:12:20,427 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 3 variables, input treesize:199, output treesize:12 [2021-03-10 22:12:20,462 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:20,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:12:20,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:12:20,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228840156] [2021-03-10 22:12:20,462 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:12:20,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:12:20,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:12:20,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:12:20,463 INFO L87 Difference]: Start difference. First operand 143 states and 301 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:20,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:12:20,944 INFO L93 Difference]: Finished difference Result 201 states and 417 transitions. [2021-03-10 22:12:20,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:12:20,944 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:12:20,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:12:20,945 INFO L225 Difference]: With dead ends: 201 [2021-03-10 22:12:20,945 INFO L226 Difference]: Without dead ends: 201 [2021-03-10 22:12:20,945 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 475.3ms TimeCoverageRelationStatistics Valid=127, Invalid=629, Unknown=0, NotChecked=0, Total=756 [2021-03-10 22:12:20,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-03-10 22:12:20,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 141. [2021-03-10 22:12:20,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.1214285714285714) internal successors, (297), 140 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:20,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 297 transitions. [2021-03-10 22:12:20,946 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 297 transitions. Word has length 19 [2021-03-10 22:12:20,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:12:20,946 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 297 transitions. [2021-03-10 22:12:20,946 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:20,946 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 297 transitions. [2021-03-10 22:12:20,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:12:20,946 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:12:20,947 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:12:21,147 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 411 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22112 [2021-03-10 22:12:21,147 INFO L428 AbstractCegarLoop]: === Iteration 417 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:12:21,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:12:21,147 INFO L82 PathProgramCache]: Analyzing trace with hash -1596769679, now seen corresponding path program 411 times [2021-03-10 22:12:21,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:12:21,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560866431] [2021-03-10 22:12:21,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:12:21,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:12:21,261 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:21,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560866431] [2021-03-10 22:12:21,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841206225] [2021-03-10 22:12:21,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:21,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 22:12:21,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:12:21,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:12:21,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:12:21,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:12:21,607 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:21,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:21,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:12:21,618 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:21,705 INFO L628 ElimStorePlain]: treesize reduction 59, result has 49.6 percent of original size [2021-03-10 22:12:21,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:12:21,710 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:21,741 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:12:21,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:12:21,745 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:21,775 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:12:21,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:12:21,779 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:21,807 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:12:21,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:12:21,811 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:21,837 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:12:21,838 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 5 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:12:21,838 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:140, output treesize:13 [2021-03-10 22:12:21,882 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:21,882 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:12:21,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:12:21,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561494603] [2021-03-10 22:12:21,882 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:12:21,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:12:21,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:12:21,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:12:21,882 INFO L87 Difference]: Start difference. First operand 141 states and 297 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:22,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:12:22,225 INFO L93 Difference]: Finished difference Result 187 states and 383 transitions. [2021-03-10 22:12:22,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:12:22,226 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:12:22,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:12:22,226 INFO L225 Difference]: With dead ends: 187 [2021-03-10 22:12:22,226 INFO L226 Difference]: Without dead ends: 187 [2021-03-10 22:12:22,226 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 370.4ms TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:12:22,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-03-10 22:12:22,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 143. [2021-03-10 22:12:22,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.1267605633802815) internal successors, (302), 142 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:22,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 302 transitions. [2021-03-10 22:12:22,227 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 302 transitions. Word has length 19 [2021-03-10 22:12:22,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:12:22,228 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 302 transitions. [2021-03-10 22:12:22,228 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:22,228 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 302 transitions. [2021-03-10 22:12:22,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:12:22,228 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:12:22,228 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:12:22,428 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 412 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22191 [2021-03-10 22:12:22,428 INFO L428 AbstractCegarLoop]: === Iteration 418 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:12:22,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:12:22,428 INFO L82 PathProgramCache]: Analyzing trace with hash 552139506, now seen corresponding path program 412 times [2021-03-10 22:12:22,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:12:22,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077967348] [2021-03-10 22:12:22,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:12:22,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:12:22,542 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:22,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077967348] [2021-03-10 22:12:22,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944618334] [2021-03-10 22:12:22,542 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 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 [2021-03-10 22:12:22,640 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:12:22,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:12:22,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:12:22,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:12:22,930 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:22,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:12:22,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:12:22,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108247640] [2021-03-10 22:12:22,930 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:12:22,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:12:22,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:12:22,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:12:22,931 INFO L87 Difference]: Start difference. First operand 143 states and 302 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:23,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:12:23,339 INFO L93 Difference]: Finished difference Result 227 states and 465 transitions. [2021-03-10 22:12:23,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:12:23,340 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:12:23,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:12:23,340 INFO L225 Difference]: With dead ends: 227 [2021-03-10 22:12:23,340 INFO L226 Difference]: Without dead ends: 227 [2021-03-10 22:12:23,340 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 365.1ms TimeCoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:12:23,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-03-10 22:12:23,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 144. [2021-03-10 22:12:23,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.1468531468531467) internal successors, (307), 143 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:23,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 307 transitions. [2021-03-10 22:12:23,342 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 307 transitions. Word has length 19 [2021-03-10 22:12:23,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:12:23,342 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 307 transitions. [2021-03-10 22:12:23,342 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:23,342 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 307 transitions. [2021-03-10 22:12:23,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:12:23,342 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:12:23,342 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:12:23,542 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 413 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22210 [2021-03-10 22:12:23,542 INFO L428 AbstractCegarLoop]: === Iteration 419 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:12:23,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:12:23,543 INFO L82 PathProgramCache]: Analyzing trace with hash 16909704, now seen corresponding path program 413 times [2021-03-10 22:12:23,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:12:23,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409923778] [2021-03-10 22:12:23,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:12:23,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:12:23,658 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:23,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409923778] [2021-03-10 22:12:23,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935032700] [2021-03-10 22:12:23,658 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:23,757 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 22:12:23,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:12:23,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:12:23,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:12:23,966 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:23,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:12:23,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:12:23,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551421630] [2021-03-10 22:12:23,967 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:12:23,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:12:23,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:12:23,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:12:23,967 INFO L87 Difference]: Start difference. First operand 144 states and 307 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:24,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:12:24,298 INFO L93 Difference]: Finished difference Result 186 states and 391 transitions. [2021-03-10 22:12:24,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:12:24,298 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:12:24,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:12:24,299 INFO L225 Difference]: With dead ends: 186 [2021-03-10 22:12:24,299 INFO L226 Difference]: Without dead ends: 186 [2021-03-10 22:12:24,299 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 314.9ms TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:12:24,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-03-10 22:12:24,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 142. [2021-03-10 22:12:24,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.127659574468085) internal successors, (300), 141 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:24,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 300 transitions. [2021-03-10 22:12:24,300 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 300 transitions. Word has length 19 [2021-03-10 22:12:24,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:12:24,300 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 300 transitions. [2021-03-10 22:12:24,300 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:24,300 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 300 transitions. [2021-03-10 22:12:24,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:12:24,300 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:12:24,301 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:12:24,501 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 414 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22246 [2021-03-10 22:12:24,501 INFO L428 AbstractCegarLoop]: === Iteration 420 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:12:24,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:12:24,501 INFO L82 PathProgramCache]: Analyzing trace with hash -347810831, now seen corresponding path program 414 times [2021-03-10 22:12:24,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:12:24,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659931826] [2021-03-10 22:12:24,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:12:24,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:12:24,608 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:24,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659931826] [2021-03-10 22:12:24,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321126040] [2021-03-10 22:12:24,608 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 22:12:24,706 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:12:24,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:12:24,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:12:24,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:12:25,027 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:25,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:12:25,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:12:25,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738022719] [2021-03-10 22:12:25,027 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:12:25,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:12:25,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:12:25,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:12:25,027 INFO L87 Difference]: Start difference. First operand 142 states and 300 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:25,372 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 27 [2021-03-10 22:12:25,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:12:25,382 INFO L93 Difference]: Finished difference Result 157 states and 326 transitions. [2021-03-10 22:12:25,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:12:25,383 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:12:25,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:12:25,383 INFO L225 Difference]: With dead ends: 157 [2021-03-10 22:12:25,383 INFO L226 Difference]: Without dead ends: 153 [2021-03-10 22:12:25,383 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 453.3ms TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:12:25,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-03-10 22:12:25,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 139. [2021-03-10 22:12:25,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.1231884057971016) internal successors, (293), 138 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:25,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 293 transitions. [2021-03-10 22:12:25,384 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 293 transitions. Word has length 19 [2021-03-10 22:12:25,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:12:25,384 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 293 transitions. [2021-03-10 22:12:25,384 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:25,385 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 293 transitions. [2021-03-10 22:12:25,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:12:25,385 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:12:25,385 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:12:25,585 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22262,415 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:25,585 INFO L428 AbstractCegarLoop]: === Iteration 421 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:12:25,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:12:25,585 INFO L82 PathProgramCache]: Analyzing trace with hash -686182245, now seen corresponding path program 415 times [2021-03-10 22:12:25,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:12:25,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732375047] [2021-03-10 22:12:25,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:12:25,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:12:25,700 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:25,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732375047] [2021-03-10 22:12:25,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975950107] [2021-03-10 22:12:25,701 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:25,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:12:25,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:12:25,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:12:26,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:26,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:26,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:12:26,018 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:26,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:26,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:12:26,022 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:26,047 INFO L628 ElimStorePlain]: treesize reduction 25, result has 41.9 percent of original size [2021-03-10 22:12:26,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:12:26,050 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:26,056 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:12:26,057 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:12:26,057 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:79, output treesize:6 [2021-03-10 22:12:26,065 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:26,065 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:12:26,065 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:12:26,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842517454] [2021-03-10 22:12:26,065 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:12:26,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:12:26,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:12:26,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:12:26,065 INFO L87 Difference]: Start difference. First operand 139 states and 293 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:26,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:12:26,305 INFO L93 Difference]: Finished difference Result 172 states and 359 transitions. [2021-03-10 22:12:26,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:12:26,306 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:12:26,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:12:26,306 INFO L225 Difference]: With dead ends: 172 [2021-03-10 22:12:26,306 INFO L226 Difference]: Without dead ends: 172 [2021-03-10 22:12:26,306 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 298.3ms TimeCoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:12:26,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-03-10 22:12:26,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 140. [2021-03-10 22:12:26,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 2.1223021582733814) internal successors, (295), 139 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:26,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 295 transitions. [2021-03-10 22:12:26,308 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 295 transitions. Word has length 19 [2021-03-10 22:12:26,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:12:26,308 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 295 transitions. [2021-03-10 22:12:26,308 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:26,308 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 295 transitions. [2021-03-10 22:12:26,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:12:26,308 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:12:26,308 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:12:26,508 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 416 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22289 [2021-03-10 22:12:26,508 INFO L428 AbstractCegarLoop]: === Iteration 422 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:12:26,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:12:26,508 INFO L82 PathProgramCache]: Analyzing trace with hash -1976335, now seen corresponding path program 416 times [2021-03-10 22:12:26,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:12:26,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132256534] [2021-03-10 22:12:26,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:12:26,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:12:26,624 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:26,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132256534] [2021-03-10 22:12:26,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264593717] [2021-03-10 22:12:26,625 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:26,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:12:26,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:12:26,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:12:26,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:12:27,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:12:27,120 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:27,123 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:12:27,124 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:27,126 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:12:27,127 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:27,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:12:27,132 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:27,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:27,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:27,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:12:27,137 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:27,139 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:12:27,140 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:27,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:27,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:27,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:12:27,145 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:27,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:12:27,149 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:27,198 INFO L628 ElimStorePlain]: treesize reduction 44, result has 42.9 percent of original size [2021-03-10 22:12:27,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:12:27,201 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:27,235 INFO L628 ElimStorePlain]: treesize reduction 1, result has 96.6 percent of original size [2021-03-10 22:12:27,236 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:12:27,236 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 3 variables, input treesize:199, output treesize:12 [2021-03-10 22:12:27,270 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:27,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:12:27,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:12:27,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785436363] [2021-03-10 22:12:27,270 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:12:27,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:12:27,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:12:27,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:12:27,271 INFO L87 Difference]: Start difference. First operand 140 states and 295 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:27,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:12:27,540 INFO L93 Difference]: Finished difference Result 195 states and 406 transitions. [2021-03-10 22:12:27,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:12:27,541 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:12:27,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:12:27,541 INFO L225 Difference]: With dead ends: 195 [2021-03-10 22:12:27,541 INFO L226 Difference]: Without dead ends: 195 [2021-03-10 22:12:27,541 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 277.9ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:12:27,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-03-10 22:12:27,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 141. [2021-03-10 22:12:27,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.1214285714285714) internal successors, (297), 140 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:27,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 297 transitions. [2021-03-10 22:12:27,542 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 297 transitions. Word has length 19 [2021-03-10 22:12:27,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:12:27,542 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 297 transitions. [2021-03-10 22:12:27,542 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:27,543 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 297 transitions. [2021-03-10 22:12:27,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:12:27,543 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:12:27,543 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:12:27,743 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 417 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22310 [2021-03-10 22:12:27,743 INFO L428 AbstractCegarLoop]: === Iteration 423 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:12:27,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:12:27,743 INFO L82 PathProgramCache]: Analyzing trace with hash 2146932850, now seen corresponding path program 417 times [2021-03-10 22:12:27,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:12:27,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464346858] [2021-03-10 22:12:27,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:12:27,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:12:27,860 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:27,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464346858] [2021-03-10 22:12:27,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468694633] [2021-03-10 22:12:27,860 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 22:12:27,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 22:12:27,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:12:27,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:12:27,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:12:28,298 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:28,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:12:28,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:12:28,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525843457] [2021-03-10 22:12:28,298 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:12:28,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:12:28,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:12:28,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:12:28,299 INFO L87 Difference]: Start difference. First operand 141 states and 297 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:28,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:12:28,480 INFO L93 Difference]: Finished difference Result 157 states and 329 transitions. [2021-03-10 22:12:28,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:12:28,481 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:12:28,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:12:28,481 INFO L225 Difference]: With dead ends: 157 [2021-03-10 22:12:28,481 INFO L226 Difference]: Without dead ends: 157 [2021-03-10 22:12:28,481 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 311.3ms TimeCoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:12:28,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-03-10 22:12:28,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 139. [2021-03-10 22:12:28,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.1231884057971016) internal successors, (293), 138 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:28,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 293 transitions. [2021-03-10 22:12:28,482 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 293 transitions. Word has length 19 [2021-03-10 22:12:28,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:12:28,482 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 293 transitions. [2021-03-10 22:12:28,482 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:28,482 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 293 transitions. [2021-03-10 22:12:28,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:12:28,483 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:12:28,483 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:12:28,683 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22396,418 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:28,683 INFO L428 AbstractCegarLoop]: === Iteration 424 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:12:28,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:12:28,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1112951401, now seen corresponding path program 418 times [2021-03-10 22:12:28,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:12:28,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502729491] [2021-03-10 22:12:28,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:12:28,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:12:28,801 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:28,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502729491] [2021-03-10 22:12:28,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608374954] [2021-03-10 22:12:28,801 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:28,901 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:12:28,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:12:28,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:12:28,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:12:29,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:29,156 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:29,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:12:29,158 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:29,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:12:29,163 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:29,286 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2021-03-10 22:12:29,287 INFO L628 ElimStorePlain]: treesize reduction 86, result has 48.8 percent of original size [2021-03-10 22:12:29,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:12:29,292 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:29,337 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:12:29,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:12:29,342 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:29,385 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:12:29,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:12:29,390 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:29,432 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:12:29,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:12:29,437 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:29,477 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:12:29,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:12:29,481 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:29,520 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:12:29,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:12:29,524 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:29,562 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:12:29,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:12:29,566 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:29,601 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:12:29,603 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:12:29,603 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:199, output treesize:13 [2021-03-10 22:12:29,648 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:29,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:12:29,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:12:29,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974861826] [2021-03-10 22:12:29,648 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:12:29,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:12:29,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:12:29,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:12:29,648 INFO L87 Difference]: Start difference. First operand 139 states and 293 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:29,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:12:29,907 INFO L93 Difference]: Finished difference Result 171 states and 349 transitions. [2021-03-10 22:12:29,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:12:29,907 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:12:29,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:12:29,908 INFO L225 Difference]: With dead ends: 171 [2021-03-10 22:12:29,908 INFO L226 Difference]: Without dead ends: 171 [2021-03-10 22:12:29,908 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 398.7ms TimeCoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:12:29,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-03-10 22:12:29,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 141. [2021-03-10 22:12:29,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.1285714285714286) internal successors, (298), 140 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:29,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 298 transitions. [2021-03-10 22:12:29,909 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 298 transitions. Word has length 19 [2021-03-10 22:12:29,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:12:29,909 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 298 transitions. [2021-03-10 22:12:29,909 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:29,909 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 298 transitions. [2021-03-10 22:12:29,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:12:29,909 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:12:29,910 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:12:30,110 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 419 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22442 [2021-03-10 22:12:30,110 INFO L428 AbstractCegarLoop]: === Iteration 425 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:12:30,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:12:30,110 INFO L82 PathProgramCache]: Analyzing trace with hash -1560289124, now seen corresponding path program 419 times [2021-03-10 22:12:30,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:12:30,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893318480] [2021-03-10 22:12:30,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:12:30,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:12:30,232 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:30,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893318480] [2021-03-10 22:12:30,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62395389] [2021-03-10 22:12:30,232 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:30,332 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 22:12:30,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:12:30,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:12:30,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:12:30,758 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:30,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:12:30,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:12:30,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984647768] [2021-03-10 22:12:30,758 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:12:30,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:12:30,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:12:30,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:12:30,759 INFO L87 Difference]: Start difference. First operand 141 states and 298 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:31,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:12:31,205 INFO L93 Difference]: Finished difference Result 208 states and 424 transitions. [2021-03-10 22:12:31,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:12:31,206 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:12:31,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:12:31,206 INFO L225 Difference]: With dead ends: 208 [2021-03-10 22:12:31,206 INFO L226 Difference]: Without dead ends: 208 [2021-03-10 22:12:31,206 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 449.6ms TimeCoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2021-03-10 22:12:31,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-03-10 22:12:31,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 142. [2021-03-10 22:12:31,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.148936170212766) internal successors, (303), 141 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:31,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 303 transitions. [2021-03-10 22:12:31,207 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 303 transitions. Word has length 19 [2021-03-10 22:12:31,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:12:31,207 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 303 transitions. [2021-03-10 22:12:31,207 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:31,208 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 303 transitions. [2021-03-10 22:12:31,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:12:31,208 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:12:31,208 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:12:31,408 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 420 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22464 [2021-03-10 22:12:31,408 INFO L428 AbstractCegarLoop]: === Iteration 426 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:12:31,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:12:31,409 INFO L82 PathProgramCache]: Analyzing trace with hash -2095518926, now seen corresponding path program 420 times [2021-03-10 22:12:31,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:12:31,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751010200] [2021-03-10 22:12:31,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:12:31,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:12:31,537 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:31,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751010200] [2021-03-10 22:12:31,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492110450] [2021-03-10 22:12:31,538 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:31,657 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 22:12:31,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:12:31,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:12:31,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:12:31,927 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:31,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:12:31,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:12:31,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674978096] [2021-03-10 22:12:31,928 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:12:31,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:12:31,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:12:31,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:12:31,928 INFO L87 Difference]: Start difference. First operand 142 states and 303 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:32,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:12:32,216 INFO L93 Difference]: Finished difference Result 172 states and 362 transitions. [2021-03-10 22:12:32,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:12:32,217 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:12:32,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:12:32,217 INFO L225 Difference]: With dead ends: 172 [2021-03-10 22:12:32,217 INFO L226 Difference]: Without dead ends: 172 [2021-03-10 22:12:32,217 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 367.2ms TimeCoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:12:32,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-03-10 22:12:32,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 140. [2021-03-10 22:12:32,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 2.129496402877698) internal successors, (296), 139 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:32,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 296 transitions. [2021-03-10 22:12:32,218 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 296 transitions. Word has length 19 [2021-03-10 22:12:32,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:12:32,218 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 296 transitions. [2021-03-10 22:12:32,218 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:32,218 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 296 transitions. [2021-03-10 22:12:32,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:12:32,219 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:12:32,219 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:12:32,419 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 421 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22539 [2021-03-10 22:12:32,419 INFO L428 AbstractCegarLoop]: === Iteration 427 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:12:32,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:12:32,419 INFO L82 PathProgramCache]: Analyzing trace with hash 1834727835, now seen corresponding path program 421 times [2021-03-10 22:12:32,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:12:32,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710996503] [2021-03-10 22:12:32,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:12:32,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:12:32,532 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:32,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710996503] [2021-03-10 22:12:32,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842808534] [2021-03-10 22:12:32,533 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-03-10 22:12:32,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:12:32,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:12:32,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:12:32,889 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:32,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:12:32,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:12:32,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68462743] [2021-03-10 22:12:32,889 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:12:32,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:12:32,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:12:32,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:12:32,890 INFO L87 Difference]: Start difference. First operand 140 states and 296 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:33,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:12:33,226 INFO L93 Difference]: Finished difference Result 149 states and 310 transitions. [2021-03-10 22:12:33,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:12:33,227 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:12:33,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:12:33,227 INFO L225 Difference]: With dead ends: 149 [2021-03-10 22:12:33,227 INFO L226 Difference]: Without dead ends: 145 [2021-03-10 22:12:33,227 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 389.4ms TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:12:33,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-03-10 22:12:33,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 138. [2021-03-10 22:12:33,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.124087591240876) internal successors, (291), 137 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:33,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 291 transitions. [2021-03-10 22:12:33,228 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 291 transitions. Word has length 19 [2021-03-10 22:12:33,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:12:33,228 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 291 transitions. [2021-03-10 22:12:33,228 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:33,228 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 291 transitions. [2021-03-10 22:12:33,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:12:33,229 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:12:33,229 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:12:33,429 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22567,422 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:33,429 INFO L428 AbstractCegarLoop]: === Iteration 428 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:12:33,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:12:33,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1626004785, now seen corresponding path program 422 times [2021-03-10 22:12:33,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:12:33,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801813962] [2021-03-10 22:12:33,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:12:33,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:12:33,552 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:33,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801813962] [2021-03-10 22:12:33,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762780052] [2021-03-10 22:12:33,552 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 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 [2021-03-10 22:12:33,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:12:33,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:12:33,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:12:33,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:12:33,946 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:33,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:33,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:12:33,949 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:33,952 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:12:33,953 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:34,031 INFO L628 ElimStorePlain]: treesize reduction 44, result has 54.6 percent of original size [2021-03-10 22:12:34,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:12:34,035 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:34,065 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:12:34,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:12:34,069 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:34,097 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:12:34,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:12:34,101 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:34,127 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:12:34,128 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:12:34,128 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 7 variables, input treesize:128, output treesize:13 [2021-03-10 22:12:34,173 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:34,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:12:34,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:12:34,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215315207] [2021-03-10 22:12:34,174 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:12:34,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:12:34,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:12:34,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:12:34,174 INFO L87 Difference]: Start difference. First operand 138 states and 291 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:34,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:12:34,482 INFO L93 Difference]: Finished difference Result 183 states and 376 transitions. [2021-03-10 22:12:34,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:12:34,483 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:12:34,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:12:34,483 INFO L225 Difference]: With dead ends: 183 [2021-03-10 22:12:34,483 INFO L226 Difference]: Without dead ends: 183 [2021-03-10 22:12:34,483 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 406.4ms TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:12:34,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-03-10 22:12:34,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 141. [2021-03-10 22:12:34,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.1357142857142857) internal successors, (299), 140 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:34,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 299 transitions. [2021-03-10 22:12:34,484 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 299 transitions. Word has length 19 [2021-03-10 22:12:34,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:12:34,485 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 299 transitions. [2021-03-10 22:12:34,485 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:34,485 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 299 transitions. [2021-03-10 22:12:34,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:12:34,485 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:12:34,485 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:12:34,685 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 423 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22585 [2021-03-10 22:12:34,685 INFO L428 AbstractCegarLoop]: === Iteration 429 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:12:34,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:12:34,685 INFO L82 PathProgramCache]: Analyzing trace with hash -520053326, now seen corresponding path program 423 times [2021-03-10 22:12:34,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:12:34,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719947076] [2021-03-10 22:12:34,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:12:34,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:12:34,798 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:34,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719947076] [2021-03-10 22:12:34,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844643110] [2021-03-10 22:12:34,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:34,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 22:12:34,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:12:34,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:12:34,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:12:35,199 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:35,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:12:35,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:12:35,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542962879] [2021-03-10 22:12:35,200 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:12:35,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:12:35,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:12:35,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:12:35,200 INFO L87 Difference]: Start difference. First operand 141 states and 299 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:35,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:12:35,870 INFO L93 Difference]: Finished difference Result 224 states and 455 transitions. [2021-03-10 22:12:35,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:12:35,871 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:12:35,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:12:35,871 INFO L225 Difference]: With dead ends: 224 [2021-03-10 22:12:35,871 INFO L226 Difference]: Without dead ends: 224 [2021-03-10 22:12:35,871 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 646.4ms TimeCoverageRelationStatistics Valid=146, Invalid=724, Unknown=0, NotChecked=0, Total=870 [2021-03-10 22:12:35,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-03-10 22:12:35,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 143. [2021-03-10 22:12:35,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.1619718309859155) internal successors, (307), 142 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:35,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 307 transitions. [2021-03-10 22:12:35,873 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 307 transitions. Word has length 19 [2021-03-10 22:12:35,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:12:35,873 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 307 transitions. [2021-03-10 22:12:35,873 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:35,873 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 307 transitions. [2021-03-10 22:12:35,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:12:35,873 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:12:35,873 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:12:36,073 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22608,424 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:36,073 INFO L428 AbstractCegarLoop]: === Iteration 430 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:12:36,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:12:36,074 INFO L82 PathProgramCache]: Analyzing trace with hash -1055283128, now seen corresponding path program 424 times [2021-03-10 22:12:36,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:12:36,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32911744] [2021-03-10 22:12:36,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:12:36,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:12:36,185 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:36,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32911744] [2021-03-10 22:12:36,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520434527] [2021-03-10 22:12:36,185 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:36,283 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:12:36,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:12:36,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:12:36,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:12:36,515 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:36,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:12:36,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:12:36,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259199576] [2021-03-10 22:12:36,515 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:12:36,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:12:36,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:12:36,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:12:36,515 INFO L87 Difference]: Start difference. First operand 143 states and 307 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:36,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:12:36,998 INFO L93 Difference]: Finished difference Result 184 states and 385 transitions. [2021-03-10 22:12:36,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:12:36,999 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:12:36,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:12:36,999 INFO L225 Difference]: With dead ends: 184 [2021-03-10 22:12:36,999 INFO L226 Difference]: Without dead ends: 184 [2021-03-10 22:12:36,999 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 501.6ms TimeCoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2021-03-10 22:12:36,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-03-10 22:12:37,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 143. [2021-03-10 22:12:37,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.1619718309859155) internal successors, (307), 142 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:37,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 307 transitions. [2021-03-10 22:12:37,000 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 307 transitions. Word has length 19 [2021-03-10 22:12:37,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:12:37,001 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 307 transitions. [2021-03-10 22:12:37,001 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:37,001 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 307 transitions. [2021-03-10 22:12:37,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:12:37,001 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:12:37,001 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:12:37,215 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 425 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22640 [2021-03-10 22:12:37,215 INFO L428 AbstractCegarLoop]: === Iteration 431 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:12:37,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:12:37,215 INFO L82 PathProgramCache]: Analyzing trace with hash -1420003663, now seen corresponding path program 425 times [2021-03-10 22:12:37,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:12:37,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370649964] [2021-03-10 22:12:37,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:12:37,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:12:37,326 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:37,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370649964] [2021-03-10 22:12:37,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370650985] [2021-03-10 22:12:37,326 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:37,426 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 22:12:37,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:12:37,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:12:37,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:12:37,764 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:37,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:12:37,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:12:37,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141325158] [2021-03-10 22:12:37,765 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:12:37,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:12:37,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:12:37,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:12:37,765 INFO L87 Difference]: Start difference. First operand 143 states and 307 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:38,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:12:38,121 INFO L93 Difference]: Finished difference Result 163 states and 341 transitions. [2021-03-10 22:12:38,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:12:38,122 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:12:38,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:12:38,122 INFO L225 Difference]: With dead ends: 163 [2021-03-10 22:12:38,122 INFO L226 Difference]: Without dead ends: 159 [2021-03-10 22:12:38,122 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 480.0ms TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:12:38,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-03-10 22:12:38,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 142. [2021-03-10 22:12:38,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.1560283687943262) internal successors, (304), 141 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:38,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 304 transitions. [2021-03-10 22:12:38,124 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 304 transitions. Word has length 19 [2021-03-10 22:12:38,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:12:38,124 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 304 transitions. [2021-03-10 22:12:38,124 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:38,124 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 304 transitions. [2021-03-10 22:12:38,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:12:38,124 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:12:38,124 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:12:38,324 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22656,426 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:38,324 INFO L428 AbstractCegarLoop]: === Iteration 432 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:12:38,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:12:38,324 INFO L82 PathProgramCache]: Analyzing trace with hash -467537806, now seen corresponding path program 426 times [2021-03-10 22:12:38,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:12:38,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203263094] [2021-03-10 22:12:38,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:12:38,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:12:38,433 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:38,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203263094] [2021-03-10 22:12:38,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107491959] [2021-03-10 22:12:38,433 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:38,533 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 22:12:38,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:12:38,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:12:38,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:12:38,771 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:38,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:12:38,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:12:38,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590615125] [2021-03-10 22:12:38,771 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:12:38,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:12:38,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:12:38,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:12:38,771 INFO L87 Difference]: Start difference. First operand 142 states and 304 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:39,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:12:39,116 INFO L93 Difference]: Finished difference Result 174 states and 363 transitions. [2021-03-10 22:12:39,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:12:39,117 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:12:39,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:12:39,117 INFO L225 Difference]: With dead ends: 174 [2021-03-10 22:12:39,118 INFO L226 Difference]: Without dead ends: 174 [2021-03-10 22:12:39,118 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 305.5ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:12:39,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-03-10 22:12:39,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 139. [2021-03-10 22:12:39,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.130434782608696) internal successors, (294), 138 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:39,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 294 transitions. [2021-03-10 22:12:39,119 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 294 transitions. Word has length 19 [2021-03-10 22:12:39,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:12:39,119 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 294 transitions. [2021-03-10 22:12:39,119 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:39,119 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 294 transitions. [2021-03-10 22:12:39,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:12:39,119 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:12:39,119 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:12:39,319 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22681,427 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:39,320 INFO L428 AbstractCegarLoop]: === Iteration 433 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:12:39,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:12:39,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1862271101, now seen corresponding path program 427 times [2021-03-10 22:12:39,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:12:39,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099895166] [2021-03-10 22:12:39,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:12:39,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:12:39,423 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:39,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099895166] [2021-03-10 22:12:39,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85787303] [2021-03-10 22:12:39,423 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:39,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:12:39,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:12:39,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:12:39,839 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:39,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:12:39,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:12:39,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223637413] [2021-03-10 22:12:39,840 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:12:39,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:12:39,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:12:39,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:12:39,840 INFO L87 Difference]: Start difference. First operand 139 states and 294 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:40,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:12:40,110 INFO L93 Difference]: Finished difference Result 150 states and 311 transitions. [2021-03-10 22:12:40,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:12:40,110 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:12:40,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:12:40,111 INFO L225 Difference]: With dead ends: 150 [2021-03-10 22:12:40,111 INFO L226 Difference]: Without dead ends: 144 [2021-03-10 22:12:40,111 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 375.0ms TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:12:40,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-03-10 22:12:40,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 137. [2021-03-10 22:12:40,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.125) internal successors, (289), 136 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:40,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 289 transitions. [2021-03-10 22:12:40,112 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 289 transitions. Word has length 19 [2021-03-10 22:12:40,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:12:40,112 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 289 transitions. [2021-03-10 22:12:40,112 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:40,112 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 289 transitions. [2021-03-10 22:12:40,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:12:40,112 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:12:40,112 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:12:40,313 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22702,428 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:40,313 INFO L428 AbstractCegarLoop]: === Iteration 434 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:12:40,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:12:40,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1746960335, now seen corresponding path program 428 times [2021-03-10 22:12:40,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:12:40,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105655561] [2021-03-10 22:12:40,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:12:40,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:12:40,429 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:40,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105655561] [2021-03-10 22:12:40,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154212169] [2021-03-10 22:12:40,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:40,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:12:40,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:12:40,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:12:40,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:12:40,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:40,767 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:40,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:12:40,768 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:40,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:40,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:12:40,773 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:40,797 INFO L628 ElimStorePlain]: treesize reduction 25, result has 41.9 percent of original size [2021-03-10 22:12:40,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:12:40,801 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:40,807 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:12:40,807 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:12:40,808 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:71, output treesize:6 [2021-03-10 22:12:40,815 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:40,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:12:40,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:12:40,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638350446] [2021-03-10 22:12:40,816 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:12:40,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:12:40,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:12:40,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:12:40,816 INFO L87 Difference]: Start difference. First operand 137 states and 289 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:41,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:12:41,068 INFO L93 Difference]: Finished difference Result 171 states and 357 transitions. [2021-03-10 22:12:41,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:12:41,069 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:12:41,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:12:41,069 INFO L225 Difference]: With dead ends: 171 [2021-03-10 22:12:41,069 INFO L226 Difference]: Without dead ends: 171 [2021-03-10 22:12:41,069 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 305.2ms TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:12:41,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-03-10 22:12:41,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 139. [2021-03-10 22:12:41,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.1231884057971016) internal successors, (293), 138 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:41,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 293 transitions. [2021-03-10 22:12:41,070 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 293 transitions. Word has length 19 [2021-03-10 22:12:41,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:12:41,070 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 293 transitions. [2021-03-10 22:12:41,070 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:41,070 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 293 transitions. [2021-03-10 22:12:41,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:12:41,071 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:12:41,071 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:12:41,271 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 429 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22726 [2021-03-10 22:12:41,271 INFO L428 AbstractCegarLoop]: === Iteration 435 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:12:41,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:12:41,271 INFO L82 PathProgramCache]: Analyzing trace with hash -1062754425, now seen corresponding path program 429 times [2021-03-10 22:12:41,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:12:41,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710241496] [2021-03-10 22:12:41,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:12:41,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:12:41,388 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:41,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710241496] [2021-03-10 22:12:41,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328295833] [2021-03-10 22:12:41,388 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:41,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 22:12:41,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:12:41,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:12:41,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:12:41,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:41,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:41,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:12:41,739 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:41,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:12:41,743 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:41,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:41,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:41,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:12:41,748 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:41,750 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:12:41,751 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:41,804 INFO L628 ElimStorePlain]: treesize reduction 45, result has 42.3 percent of original size [2021-03-10 22:12:41,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:12:41,807 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:41,841 INFO L628 ElimStorePlain]: treesize reduction 1, result has 96.6 percent of original size [2021-03-10 22:12:41,842 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:12:41,842 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:140, output treesize:12 [2021-03-10 22:12:41,877 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:41,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:12:41,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:12:41,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828761861] [2021-03-10 22:12:41,877 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:12:41,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:12:41,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:12:41,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:12:41,878 INFO L87 Difference]: Start difference. First operand 139 states and 293 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:42,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:12:42,151 INFO L93 Difference]: Finished difference Result 194 states and 404 transitions. [2021-03-10 22:12:42,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:12:42,152 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:12:42,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:12:42,152 INFO L225 Difference]: With dead ends: 194 [2021-03-10 22:12:42,152 INFO L226 Difference]: Without dead ends: 194 [2021-03-10 22:12:42,152 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 285.0ms TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:12:42,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-03-10 22:12:42,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 140. [2021-03-10 22:12:42,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 2.1223021582733814) internal successors, (295), 139 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:42,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 295 transitions. [2021-03-10 22:12:42,153 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 295 transitions. Word has length 19 [2021-03-10 22:12:42,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:12:42,153 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 295 transitions. [2021-03-10 22:12:42,153 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:42,154 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 295 transitions. [2021-03-10 22:12:42,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:12:42,154 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:12:42,154 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:12:42,354 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 430 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22752 [2021-03-10 22:12:42,354 INFO L428 AbstractCegarLoop]: === Iteration 436 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:12:42,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:12:42,354 INFO L82 PathProgramCache]: Analyzing trace with hash 1086154760, now seen corresponding path program 430 times [2021-03-10 22:12:42,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:12:42,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282819295] [2021-03-10 22:12:42,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:12:42,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:12:42,473 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:42,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282819295] [2021-03-10 22:12:42,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540697274] [2021-03-10 22:12:42,473 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:42,573 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:12:42,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:12:42,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:12:42,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:12:42,941 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:42,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:12:42,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:12:42,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132179974] [2021-03-10 22:12:42,942 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:12:42,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:12:42,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:12:42,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:12:42,942 INFO L87 Difference]: Start difference. First operand 140 states and 295 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:43,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:12:43,218 INFO L93 Difference]: Finished difference Result 156 states and 327 transitions. [2021-03-10 22:12:43,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:12:43,219 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:12:43,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:12:43,219 INFO L225 Difference]: With dead ends: 156 [2021-03-10 22:12:43,219 INFO L226 Difference]: Without dead ends: 156 [2021-03-10 22:12:43,220 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 341.5ms TimeCoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:12:43,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-03-10 22:12:43,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 138. [2021-03-10 22:12:43,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.124087591240876) internal successors, (291), 137 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:43,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 291 transitions. [2021-03-10 22:12:43,221 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 291 transitions. Word has length 19 [2021-03-10 22:12:43,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:12:43,221 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 291 transitions. [2021-03-10 22:12:43,221 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:43,221 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 291 transitions. [2021-03-10 22:12:43,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:12:43,221 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:12:43,221 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:12:43,421 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 431 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22785 [2021-03-10 22:12:43,421 INFO L428 AbstractCegarLoop]: === Iteration 437 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:12:43,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:12:43,422 INFO L82 PathProgramCache]: Analyzing trace with hash 2121237805, now seen corresponding path program 431 times [2021-03-10 22:12:43,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:12:43,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454766188] [2021-03-10 22:12:43,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:12:43,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:12:43,538 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:43,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454766188] [2021-03-10 22:12:43,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373538361] [2021-03-10 22:12:43,539 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:43,640 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 22:12:43,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:12:43,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:12:43,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:12:43,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:12:43,891 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:43,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:43,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:12:43,896 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:43,979 INFO L628 ElimStorePlain]: treesize reduction 51, result has 53.2 percent of original size [2021-03-10 22:12:43,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:12:43,984 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:44,016 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:12:44,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:12:44,020 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:44,050 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:12:44,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:12:44,055 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:44,083 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:12:44,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:12:44,087 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:44,114 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:12:44,115 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 5 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:12:44,115 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:140, output treesize:13 [2021-03-10 22:12:44,160 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:44,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:12:44,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:12:44,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29977563] [2021-03-10 22:12:44,160 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:12:44,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:12:44,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:12:44,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:12:44,161 INFO L87 Difference]: Start difference. First operand 138 states and 291 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:44,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:12:44,558 INFO L93 Difference]: Finished difference Result 183 states and 366 transitions. [2021-03-10 22:12:44,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:12:44,558 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:12:44,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:12:44,559 INFO L225 Difference]: With dead ends: 183 [2021-03-10 22:12:44,559 INFO L226 Difference]: Without dead ends: 183 [2021-03-10 22:12:44,559 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 441.7ms TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:12:44,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-03-10 22:12:44,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 139. [2021-03-10 22:12:44,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.130434782608696) internal successors, (294), 138 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:44,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 294 transitions. [2021-03-10 22:12:44,560 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 294 transitions. Word has length 19 [2021-03-10 22:12:44,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:12:44,560 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 294 transitions. [2021-03-10 22:12:44,560 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:44,560 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 294 transitions. [2021-03-10 22:12:44,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:12:44,560 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:12:44,560 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:12:44,761 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22841,432 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:44,761 INFO L428 AbstractCegarLoop]: === Iteration 438 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:12:44,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:12:44,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1138670280, now seen corresponding path program 432 times [2021-03-10 22:12:44,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:12:44,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124359287] [2021-03-10 22:12:44,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:12:44,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:12:44,876 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:44,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124359287] [2021-03-10 22:12:44,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869993936] [2021-03-10 22:12:44,877 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:44,977 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 22:12:44,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:12:44,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:12:44,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:12:45,230 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:45,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:12:45,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:12:45,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173596340] [2021-03-10 22:12:45,230 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:12:45,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:12:45,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:12:45,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:12:45,231 INFO L87 Difference]: Start difference. First operand 139 states and 294 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:45,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:12:45,597 INFO L93 Difference]: Finished difference Result 167 states and 351 transitions. [2021-03-10 22:12:45,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:12:45,597 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:12:45,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:12:45,598 INFO L225 Difference]: With dead ends: 167 [2021-03-10 22:12:45,598 INFO L226 Difference]: Without dead ends: 167 [2021-03-10 22:12:45,598 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 351.3ms TimeCoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:12:45,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-03-10 22:12:45,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 139. [2021-03-10 22:12:45,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.130434782608696) internal successors, (294), 138 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:45,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 294 transitions. [2021-03-10 22:12:45,599 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 294 transitions. Word has length 19 [2021-03-10 22:12:45,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:12:45,599 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 294 transitions. [2021-03-10 22:12:45,599 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:45,599 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 294 transitions. [2021-03-10 22:12:45,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:12:45,599 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:12:45,599 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:12:45,800 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 433 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22860 [2021-03-10 22:12:45,800 INFO L428 AbstractCegarLoop]: === Iteration 439 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:12:45,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:12:45,800 INFO L82 PathProgramCache]: Analyzing trace with hash 773949745, now seen corresponding path program 433 times [2021-03-10 22:12:45,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:12:45,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772131105] [2021-03-10 22:12:45,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:12:45,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:12:45,927 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:45,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772131105] [2021-03-10 22:12:45,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119514365] [2021-03-10 22:12:45,927 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:46,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:12:46,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:12:46,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:12:46,362 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:46,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:12:46,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:12:46,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050347090] [2021-03-10 22:12:46,363 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:12:46,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:12:46,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:12:46,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:12:46,363 INFO L87 Difference]: Start difference. First operand 139 states and 294 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:46,731 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 27 [2021-03-10 22:12:46,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:12:46,761 INFO L93 Difference]: Finished difference Result 149 states and 310 transitions. [2021-03-10 22:12:46,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:12:46,762 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:12:46,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:12:46,762 INFO L225 Difference]: With dead ends: 149 [2021-03-10 22:12:46,762 INFO L226 Difference]: Without dead ends: 145 [2021-03-10 22:12:46,762 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 498.3ms TimeCoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:12:46,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-03-10 22:12:46,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 137. [2021-03-10 22:12:46,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.125) internal successors, (289), 136 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:46,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 289 transitions. [2021-03-10 22:12:46,763 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 289 transitions. Word has length 19 [2021-03-10 22:12:46,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:12:46,763 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 289 transitions. [2021-03-10 22:12:46,763 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:46,763 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 289 transitions. [2021-03-10 22:12:46,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:12:46,763 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:12:46,764 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:12:46,964 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22890,434 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:46,964 INFO L428 AbstractCegarLoop]: === Iteration 440 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:12:46,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:12:46,964 INFO L82 PathProgramCache]: Analyzing trace with hash 565226695, now seen corresponding path program 434 times [2021-03-10 22:12:46,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:12:46,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976118721] [2021-03-10 22:12:46,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:12:46,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:12:47,086 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:47,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976118721] [2021-03-10 22:12:47,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677323975] [2021-03-10 22:12:47,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:47,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:12:47,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:12:47,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:12:47,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:12:47,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:12:47,499 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:47,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:47,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:12:47,504 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:47,597 INFO L628 ElimStorePlain]: treesize reduction 51, result has 51.4 percent of original size [2021-03-10 22:12:47,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:12:47,601 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:47,633 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:12:47,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:12:47,638 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:47,666 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:12:47,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:12:47,670 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:47,697 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:12:47,699 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:12:47,699 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 7 variables, input treesize:128, output treesize:13 [2021-03-10 22:12:47,745 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:47,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:12:47,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:12:47,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477282768] [2021-03-10 22:12:47,745 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:12:47,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:12:47,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:12:47,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:12:47,746 INFO L87 Difference]: Start difference. First operand 137 states and 289 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:48,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:12:48,181 INFO L93 Difference]: Finished difference Result 179 states and 367 transitions. [2021-03-10 22:12:48,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:12:48,182 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:12:48,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:12:48,182 INFO L225 Difference]: With dead ends: 179 [2021-03-10 22:12:48,182 INFO L226 Difference]: Without dead ends: 179 [2021-03-10 22:12:48,183 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 559.3ms TimeCoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:12:48,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-03-10 22:12:48,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 140. [2021-03-10 22:12:48,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 2.1366906474820144) internal successors, (297), 139 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:48,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 297 transitions. [2021-03-10 22:12:48,184 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 297 transitions. Word has length 19 [2021-03-10 22:12:48,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:12:48,184 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 297 transitions. [2021-03-10 22:12:48,184 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:48,184 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 297 transitions. [2021-03-10 22:12:48,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:12:48,184 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:12:48,184 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:12:48,384 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 435 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22912 [2021-03-10 22:12:48,385 INFO L428 AbstractCegarLoop]: === Iteration 441 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:12:48,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:12:48,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1580831416, now seen corresponding path program 435 times [2021-03-10 22:12:48,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:12:48,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460605962] [2021-03-10 22:12:48,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:12:48,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:12:48,499 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:48,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460605962] [2021-03-10 22:12:48,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902927792] [2021-03-10 22:12:48,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:48,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 22:12:48,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:12:48,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:12:48,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:12:49,082 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:49,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:12:49,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:12:49,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469365346] [2021-03-10 22:12:49,083 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:12:49,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:12:49,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:12:49,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:12:49,083 INFO L87 Difference]: Start difference. First operand 140 states and 297 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:49,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:12:49,868 INFO L93 Difference]: Finished difference Result 231 states and 461 transitions. [2021-03-10 22:12:49,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 22:12:49,868 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:12:49,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:12:49,868 INFO L225 Difference]: With dead ends: 231 [2021-03-10 22:12:49,868 INFO L226 Difference]: Without dead ends: 231 [2021-03-10 22:12:49,868 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 791.4ms TimeCoverageRelationStatistics Valid=172, Invalid=820, Unknown=0, NotChecked=0, Total=992 [2021-03-10 22:12:49,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-03-10 22:12:49,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 142. [2021-03-10 22:12:49,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.1631205673758864) internal successors, (305), 141 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:49,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 305 transitions. [2021-03-10 22:12:49,870 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 305 transitions. Word has length 19 [2021-03-10 22:12:49,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:12:49,870 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 305 transitions. [2021-03-10 22:12:49,870 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:49,870 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 305 transitions. [2021-03-10 22:12:49,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:12:49,870 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:12:49,870 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:12:50,070 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22932,436 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:50,070 INFO L428 AbstractCegarLoop]: === Iteration 442 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:12:50,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:12:50,071 INFO L82 PathProgramCache]: Analyzing trace with hash -2116061218, now seen corresponding path program 436 times [2021-03-10 22:12:50,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:12:50,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252836671] [2021-03-10 22:12:50,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:12:50,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:12:50,184 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:50,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252836671] [2021-03-10 22:12:50,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748167371] [2021-03-10 22:12:50,185 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:50,286 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:12:50,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:12:50,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:12:50,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:12:50,558 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:50,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:12:50,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:12:50,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127211316] [2021-03-10 22:12:50,558 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:12:50,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:12:50,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:12:50,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:12:50,559 INFO L87 Difference]: Start difference. First operand 142 states and 305 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:51,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:12:51,114 INFO L93 Difference]: Finished difference Result 177 states and 371 transitions. [2021-03-10 22:12:51,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:12:51,114 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:12:51,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:12:51,115 INFO L225 Difference]: With dead ends: 177 [2021-03-10 22:12:51,115 INFO L226 Difference]: Without dead ends: 177 [2021-03-10 22:12:51,115 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 564.3ms TimeCoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2021-03-10 22:12:51,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-03-10 22:12:51,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 142. [2021-03-10 22:12:51,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.1631205673758864) internal successors, (305), 141 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:51,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 305 transitions. [2021-03-10 22:12:51,116 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 305 transitions. Word has length 19 [2021-03-10 22:12:51,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:12:51,116 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 305 transitions. [2021-03-10 22:12:51,116 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:51,116 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 305 transitions. [2021-03-10 22:12:51,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:12:51,116 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:12:51,116 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:12:51,317 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 437 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22998 [2021-03-10 22:12:51,317 INFO L428 AbstractCegarLoop]: === Iteration 443 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:12:51,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:12:51,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1814185543, now seen corresponding path program 437 times [2021-03-10 22:12:51,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:12:51,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092576144] [2021-03-10 22:12:51,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:12:51,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:12:51,426 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:51,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092576144] [2021-03-10 22:12:51,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813310926] [2021-03-10 22:12:51,426 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:51,528 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:12:51,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:12:51,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:12:51,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:12:51,840 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:51,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:12:51,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:12:51,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370579303] [2021-03-10 22:12:51,840 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:12:51,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:12:51,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:12:51,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:12:51,841 INFO L87 Difference]: Start difference. First operand 142 states and 305 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:52,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:12:52,335 INFO L93 Difference]: Finished difference Result 160 states and 336 transitions. [2021-03-10 22:12:52,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:12:52,336 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:12:52,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:12:52,336 INFO L225 Difference]: With dead ends: 160 [2021-03-10 22:12:52,336 INFO L226 Difference]: Without dead ends: 154 [2021-03-10 22:12:52,336 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 542.4ms TimeCoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:12:52,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-03-10 22:12:52,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 141. [2021-03-10 22:12:52,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.15) internal successors, (301), 140 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:52,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 301 transitions. [2021-03-10 22:12:52,337 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 301 transitions. Word has length 19 [2021-03-10 22:12:52,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:12:52,337 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 301 transitions. [2021-03-10 22:12:52,337 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:52,337 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 301 transitions. [2021-03-10 22:12:52,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:12:52,338 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:12:52,338 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:12:52,538 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 438 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23027 [2021-03-10 22:12:52,538 INFO L428 AbstractCegarLoop]: === Iteration 444 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:12:52,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:12:52,538 INFO L82 PathProgramCache]: Analyzing trace with hash -1528315896, now seen corresponding path program 438 times [2021-03-10 22:12:52,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:12:52,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227835579] [2021-03-10 22:12:52,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:12:52,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:12:52,655 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:52,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227835579] [2021-03-10 22:12:52,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538199007] [2021-03-10 22:12:52,655 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:52,758 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:12:52,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:12:52,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:12:52,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:12:53,027 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:53,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:12:53,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:12:53,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076965577] [2021-03-10 22:12:53,028 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:12:53,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:12:53,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:12:53,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:12:53,028 INFO L87 Difference]: Start difference. First operand 141 states and 301 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:53,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:12:53,369 INFO L93 Difference]: Finished difference Result 171 states and 357 transitions. [2021-03-10 22:12:53,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:12:53,370 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:12:53,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:12:53,370 INFO L225 Difference]: With dead ends: 171 [2021-03-10 22:12:53,370 INFO L226 Difference]: Without dead ends: 171 [2021-03-10 22:12:53,370 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 334.2ms TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:12:53,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-03-10 22:12:53,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 136. [2021-03-10 22:12:53,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.1259259259259258) internal successors, (287), 135 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:53,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 287 transitions. [2021-03-10 22:12:53,371 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 287 transitions. Word has length 19 [2021-03-10 22:12:53,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:12:53,371 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 287 transitions. [2021-03-10 22:12:53,371 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:53,371 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 287 transitions. [2021-03-10 22:12:53,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:12:53,372 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:12:53,372 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:12:53,572 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23045,439 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:53,572 INFO L428 AbstractCegarLoop]: === Iteration 445 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:12:53,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:12:53,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1049044973, now seen corresponding path program 439 times [2021-03-10 22:12:53,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:12:53,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943199051] [2021-03-10 22:12:53,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:12:53,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:12:53,696 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:53,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943199051] [2021-03-10 22:12:53,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976516606] [2021-03-10 22:12:53,696 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:53,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:12:53,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:12:53,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:12:54,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:54,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:12:54,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:12:54,154 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:54,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:12:54,159 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:54,246 INFO L628 ElimStorePlain]: treesize reduction 51, result has 53.2 percent of original size [2021-03-10 22:12:54,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:12:54,250 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:54,283 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:12:54,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:12:54,288 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:54,319 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:12:54,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:12:54,323 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:54,353 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:12:54,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:12:54,357 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:12:54,384 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:12:54,386 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 5 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:12:54,386 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:140, output treesize:13 [2021-03-10 22:12:54,434 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:54,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:12:54,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:12:54,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720320492] [2021-03-10 22:12:54,435 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:12:54,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:12:54,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:12:54,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:12:54,435 INFO L87 Difference]: Start difference. First operand 136 states and 287 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:55,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:12:55,017 INFO L93 Difference]: Finished difference Result 182 states and 368 transitions. [2021-03-10 22:12:55,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:12:55,018 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:12:55,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:12:55,018 INFO L225 Difference]: With dead ends: 182 [2021-03-10 22:12:55,018 INFO L226 Difference]: Without dead ends: 182 [2021-03-10 22:12:55,018 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 644.7ms TimeCoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:12:55,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-03-10 22:12:55,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 140. [2021-03-10 22:12:55,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 2.143884892086331) internal successors, (298), 139 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:55,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 298 transitions. [2021-03-10 22:12:55,020 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 298 transitions. Word has length 19 [2021-03-10 22:12:55,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:12:55,020 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 298 transitions. [2021-03-10 22:12:55,020 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:55,020 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 298 transitions. [2021-03-10 22:12:55,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:12:55,020 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:12:55,020 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:12:55,220 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23074,440 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:55,220 INFO L428 AbstractCegarLoop]: === Iteration 446 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:12:55,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:12:55,220 INFO L82 PathProgramCache]: Analyzing trace with hash 601707250, now seen corresponding path program 440 times [2021-03-10 22:12:55,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:12:55,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320136857] [2021-03-10 22:12:55,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:12:55,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:12:55,340 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:55,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320136857] [2021-03-10 22:12:55,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719445492] [2021-03-10 22:12:55,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:55,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:12:55,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:12:55,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:12:55,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:12:55,772 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:55,772 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:12:55,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:12:55,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892142637] [2021-03-10 22:12:55,772 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:12:55,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:12:55,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:12:55,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:12:55,772 INFO L87 Difference]: Start difference. First operand 140 states and 298 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:56,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:12:56,765 INFO L93 Difference]: Finished difference Result 224 states and 447 transitions. [2021-03-10 22:12:56,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 22:12:56,766 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:12:56,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:12:56,766 INFO L225 Difference]: With dead ends: 224 [2021-03-10 22:12:56,766 INFO L226 Difference]: Without dead ends: 224 [2021-03-10 22:12:56,766 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 971.5ms TimeCoverageRelationStatistics Valid=185, Invalid=871, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 22:12:56,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-03-10 22:12:56,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 143. [2021-03-10 22:12:56,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.176056338028169) internal successors, (309), 142 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:56,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 309 transitions. [2021-03-10 22:12:56,768 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 309 transitions. Word has length 19 [2021-03-10 22:12:56,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:12:56,768 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 309 transitions. [2021-03-10 22:12:56,768 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:56,768 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 309 transitions. [2021-03-10 22:12:56,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:12:56,768 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:12:56,768 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:12:56,968 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23097,441 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:56,968 INFO L428 AbstractCegarLoop]: === Iteration 447 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:12:56,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:12:56,969 INFO L82 PathProgramCache]: Analyzing trace with hash 66477448, now seen corresponding path program 441 times [2021-03-10 22:12:56,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:12:56,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987019623] [2021-03-10 22:12:56,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:12:56,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:12:57,088 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:57,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987019623] [2021-03-10 22:12:57,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425718880] [2021-03-10 22:12:57,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:57,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 22:12:57,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:12:57,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:12:57,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:12:57,487 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:57,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:12:57,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:12:57,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842269653] [2021-03-10 22:12:57,488 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:12:57,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:12:57,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:12:57,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:12:57,488 INFO L87 Difference]: Start difference. First operand 143 states and 309 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:58,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:12:58,123 INFO L93 Difference]: Finished difference Result 185 states and 387 transitions. [2021-03-10 22:12:58,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:12:58,123 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:12:58,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:12:58,124 INFO L225 Difference]: With dead ends: 185 [2021-03-10 22:12:58,124 INFO L226 Difference]: Without dead ends: 185 [2021-03-10 22:12:58,124 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 661.8ms TimeCoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2021-03-10 22:12:58,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-03-10 22:12:58,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 143. [2021-03-10 22:12:58,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.176056338028169) internal successors, (309), 142 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:58,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 309 transitions. [2021-03-10 22:12:58,125 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 309 transitions. Word has length 19 [2021-03-10 22:12:58,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:12:58,125 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 309 transitions. [2021-03-10 22:12:58,125 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:58,125 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 309 transitions. [2021-03-10 22:12:58,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:12:58,125 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:12:58,125 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:12:58,326 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23126,442 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:58,326 INFO L428 AbstractCegarLoop]: === Iteration 448 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:12:58,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:12:58,326 INFO L82 PathProgramCache]: Analyzing trace with hash -298243087, now seen corresponding path program 442 times [2021-03-10 22:12:58,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:12:58,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609020070] [2021-03-10 22:12:58,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:12:58,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:12:58,440 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:58,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609020070] [2021-03-10 22:12:58,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321639147] [2021-03-10 22:12:58,441 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:12:58,544 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:12:58,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:12:58,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:12:58,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:12:58,997 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:12:58,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:12:58,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:12:58,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287090918] [2021-03-10 22:12:58,998 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:12:58,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:12:58,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:12:58,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:12:58,998 INFO L87 Difference]: Start difference. First operand 143 states and 309 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:59,679 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 41 [2021-03-10 22:12:59,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:12:59,716 INFO L93 Difference]: Finished difference Result 174 states and 363 transitions. [2021-03-10 22:12:59,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:12:59,716 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:12:59,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:12:59,716 INFO L225 Difference]: With dead ends: 174 [2021-03-10 22:12:59,716 INFO L226 Difference]: Without dead ends: 168 [2021-03-10 22:12:59,717 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 822.5ms TimeCoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2021-03-10 22:12:59,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-03-10 22:12:59,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 142. [2021-03-10 22:12:59,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.1631205673758864) internal successors, (305), 141 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:59,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 305 transitions. [2021-03-10 22:12:59,719 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 305 transitions. Word has length 19 [2021-03-10 22:12:59,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:12:59,719 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 305 transitions. [2021-03-10 22:12:59,719 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:12:59,719 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 305 transitions. [2021-03-10 22:12:59,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:12:59,719 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:12:59,719 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:12:59,933 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 443 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23146 [2021-03-10 22:12:59,934 INFO L428 AbstractCegarLoop]: === Iteration 449 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:12:59,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:12:59,934 INFO L82 PathProgramCache]: Analyzing trace with hash 654222770, now seen corresponding path program 443 times [2021-03-10 22:12:59,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:12:59,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906543898] [2021-03-10 22:12:59,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:12:59,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:13:00,056 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:00,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906543898] [2021-03-10 22:13:00,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158497766] [2021-03-10 22:13:00,057 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:13:00,161 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:13:00,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:13:00,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:13:00,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:13:00,416 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:00,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:13:00,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:13:00,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467360743] [2021-03-10 22:13:00,416 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:13:00,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:13:00,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:13:00,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:13:00,417 INFO L87 Difference]: Start difference. First operand 142 states and 305 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:00,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:13:00,878 INFO L93 Difference]: Finished difference Result 172 states and 361 transitions. [2021-03-10 22:13:00,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:13:00,878 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:13:00,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:13:00,879 INFO L225 Difference]: With dead ends: 172 [2021-03-10 22:13:00,879 INFO L226 Difference]: Without dead ends: 172 [2021-03-10 22:13:00,879 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 472.2ms TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:13:00,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-03-10 22:13:00,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 141. [2021-03-10 22:13:00,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.164285714285714) internal successors, (303), 140 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:00,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 303 transitions. [2021-03-10 22:13:00,880 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 303 transitions. Word has length 19 [2021-03-10 22:13:00,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:13:00,880 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 303 transitions. [2021-03-10 22:13:00,880 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:00,880 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 303 transitions. [2021-03-10 22:13:00,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:13:00,881 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:13:00,881 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:13:01,081 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23174,444 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:13:01,081 INFO L428 AbstractCegarLoop]: === Iteration 450 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:13:01,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:13:01,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1694458568, now seen corresponding path program 444 times [2021-03-10 22:13:01,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:13:01,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824792620] [2021-03-10 22:13:01,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:13:01,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:13:01,199 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:01,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824792620] [2021-03-10 22:13:01,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920989019] [2021-03-10 22:13:01,200 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:13:01,305 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 22:13:01,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:13:01,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:13:01,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:13:01,547 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:01,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:13:01,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:13:01,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504493683] [2021-03-10 22:13:01,548 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:13:01,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:13:01,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:13:01,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:13:01,548 INFO L87 Difference]: Start difference. First operand 141 states and 303 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:01,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:13:01,900 INFO L93 Difference]: Finished difference Result 163 states and 341 transitions. [2021-03-10 22:13:01,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:13:01,901 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:13:01,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:13:01,901 INFO L225 Difference]: With dead ends: 163 [2021-03-10 22:13:01,901 INFO L226 Difference]: Without dead ends: 163 [2021-03-10 22:13:01,901 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 368.5ms TimeCoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:13:01,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-03-10 22:13:01,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 137. [2021-03-10 22:13:01,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.1323529411764706) internal successors, (290), 136 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:01,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 290 transitions. [2021-03-10 22:13:01,903 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 290 transitions. Word has length 19 [2021-03-10 22:13:01,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:13:01,903 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 290 transitions. [2021-03-10 22:13:01,903 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:01,903 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 290 transitions. [2021-03-10 22:13:01,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:13:01,903 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:13:01,903 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:13:02,103 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 445 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23190 [2021-03-10 22:13:02,103 INFO L428 AbstractCegarLoop]: === Iteration 451 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:13:02,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:13:02,103 INFO L82 PathProgramCache]: Analyzing trace with hash 1655334257, now seen corresponding path program 445 times [2021-03-10 22:13:02,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:13:02,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592757241] [2021-03-10 22:13:02,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:13:02,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:13:02,208 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:02,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592757241] [2021-03-10 22:13:02,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135284234] [2021-03-10 22:13:02,208 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:13:02,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:13:02,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:13:02,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:13:02,643 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:02,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:13:02,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:13:02,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26318769] [2021-03-10 22:13:02,643 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:13:02,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:13:02,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:13:02,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:13:02,643 INFO L87 Difference]: Start difference. First operand 137 states and 290 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:02,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:13:02,984 INFO L93 Difference]: Finished difference Result 150 states and 310 transitions. [2021-03-10 22:13:02,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:13:02,985 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:13:02,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:13:02,985 INFO L225 Difference]: With dead ends: 150 [2021-03-10 22:13:02,985 INFO L226 Difference]: Without dead ends: 142 [2021-03-10 22:13:02,985 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 477.5ms TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:13:02,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-03-10 22:13:02,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 135. [2021-03-10 22:13:02,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.126865671641791) internal successors, (285), 134 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:02,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 285 transitions. [2021-03-10 22:13:02,986 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 285 transitions. Word has length 19 [2021-03-10 22:13:02,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:13:02,986 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 285 transitions. [2021-03-10 22:13:02,986 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:02,986 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 285 transitions. [2021-03-10 22:13:02,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:13:02,986 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:13:02,986 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:13:03,187 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23206,446 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:13:03,187 INFO L428 AbstractCegarLoop]: === Iteration 452 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:13:03,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:13:03,187 INFO L82 PathProgramCache]: Analyzing trace with hash 529488319, now seen corresponding path program 446 times [2021-03-10 22:13:03,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:13:03,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405569658] [2021-03-10 22:13:03,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:13:03,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:13:03,307 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:03,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405569658] [2021-03-10 22:13:03,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139388576] [2021-03-10 22:13:03,307 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:13:03,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:13:03,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:13:03,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:13:03,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:13:03,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:03,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:03,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:13:03,635 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:03,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:03,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:03,639 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:13:03,640 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:03,643 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:13:03,644 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:03,646 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:13:03,647 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:03,663 INFO L628 ElimStorePlain]: treesize reduction 4, result has 81.8 percent of original size [2021-03-10 22:13:03,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:13:03,667 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:03,673 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:13:03,674 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:13:03,674 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:114, output treesize:6 [2021-03-10 22:13:03,683 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:03,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:13:03,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-10 22:13:03,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023988737] [2021-03-10 22:13:03,683 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:13:03,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:13:03,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:13:03,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:13:03,683 INFO L87 Difference]: Start difference. First operand 135 states and 285 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:04,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:13:04,033 INFO L93 Difference]: Finished difference Result 180 states and 375 transitions. [2021-03-10 22:13:04,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:13:04,034 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:13:04,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:13:04,034 INFO L225 Difference]: With dead ends: 180 [2021-03-10 22:13:04,034 INFO L226 Difference]: Without dead ends: 180 [2021-03-10 22:13:04,034 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 325.2ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:13:04,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-03-10 22:13:04,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 135. [2021-03-10 22:13:04,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.126865671641791) internal successors, (285), 134 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:04,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 285 transitions. [2021-03-10 22:13:04,036 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 285 transitions. Word has length 19 [2021-03-10 22:13:04,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:13:04,036 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 285 transitions. [2021-03-10 22:13:04,036 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:04,036 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 285 transitions. [2021-03-10 22:13:04,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:13:04,036 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:13:04,036 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:13:04,236 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 447 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23226 [2021-03-10 22:13:04,236 INFO L428 AbstractCegarLoop]: === Iteration 453 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:13:04,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:13:04,236 INFO L82 PathProgramCache]: Analyzing trace with hash -855689427, now seen corresponding path program 447 times [2021-03-10 22:13:04,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:13:04,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427497836] [2021-03-10 22:13:04,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:13:04,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:13:04,345 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:04,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427497836] [2021-03-10 22:13:04,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128410302] [2021-03-10 22:13:04,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:13:04,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 22:13:04,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:13:04,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:13:04,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:13:04,741 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:13:04,742 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:04,744 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:13:04,745 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:04,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:04,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:04,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:13:04,750 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:04,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:04,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:13:04,754 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:04,770 INFO L628 ElimStorePlain]: treesize reduction 4, result has 81.8 percent of original size [2021-03-10 22:13:04,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:13:04,773 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:04,779 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:13:04,780 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:13:04,780 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:114, output treesize:6 [2021-03-10 22:13:04,789 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:04,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:13:04,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-10 22:13:04,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42638819] [2021-03-10 22:13:04,789 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:13:04,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:13:04,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:13:04,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:13:04,789 INFO L87 Difference]: Start difference. First operand 135 states and 285 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:05,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:13:05,310 INFO L93 Difference]: Finished difference Result 188 states and 391 transitions. [2021-03-10 22:13:05,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:13:05,311 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:13:05,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:13:05,311 INFO L225 Difference]: With dead ends: 188 [2021-03-10 22:13:05,312 INFO L226 Difference]: Without dead ends: 188 [2021-03-10 22:13:05,312 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 471.0ms TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:13:05,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-03-10 22:13:05,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 136. [2021-03-10 22:13:05,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.1259259259259258) internal successors, (287), 135 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:05,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 287 transitions. [2021-03-10 22:13:05,313 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 287 transitions. Word has length 19 [2021-03-10 22:13:05,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:13:05,313 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 287 transitions. [2021-03-10 22:13:05,313 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:05,313 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 287 transitions. [2021-03-10 22:13:05,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:13:05,313 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:13:05,313 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:13:05,513 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23252,448 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:13:05,514 INFO L428 AbstractCegarLoop]: === Iteration 454 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:13:05,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:13:05,514 INFO L82 PathProgramCache]: Analyzing trace with hash -171483517, now seen corresponding path program 448 times [2021-03-10 22:13:05,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:13:05,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461823736] [2021-03-10 22:13:05,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:13:05,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:13:05,622 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:05,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461823736] [2021-03-10 22:13:05,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686485822] [2021-03-10 22:13:05,623 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:13:05,727 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:13:05,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:13:05,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:13:05,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:13:06,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:13:06,059 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:06,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:06,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:06,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:13:06,064 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:06,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:13:06,068 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:06,071 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:13:06,072 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:06,074 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:13:06,075 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:06,077 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:13:06,078 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:06,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:06,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:06,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:13:06,084 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:06,086 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:13:06,087 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:06,137 INFO L628 ElimStorePlain]: treesize reduction 25, result has 56.9 percent of original size [2021-03-10 22:13:06,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:13:06,140 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:06,175 INFO L628 ElimStorePlain]: treesize reduction 1, result has 96.6 percent of original size [2021-03-10 22:13:06,176 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:13:06,176 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 3 variables, input treesize:199, output treesize:12 [2021-03-10 22:13:06,210 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:06,210 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:13:06,210 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-10 22:13:06,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610247929] [2021-03-10 22:13:06,210 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:13:06,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:13:06,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:13:06,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:13:06,211 INFO L87 Difference]: Start difference. First operand 136 states and 287 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:06,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:13:06,920 INFO L93 Difference]: Finished difference Result 204 states and 424 transitions. [2021-03-10 22:13:06,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 22:13:06,921 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:13:06,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:13:06,921 INFO L225 Difference]: With dead ends: 204 [2021-03-10 22:13:06,921 INFO L226 Difference]: Without dead ends: 204 [2021-03-10 22:13:06,922 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 616.9ms TimeCoverageRelationStatistics Valid=143, Invalid=669, Unknown=0, NotChecked=0, Total=812 [2021-03-10 22:13:06,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-03-10 22:13:06,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 137. [2021-03-10 22:13:06,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.125) internal successors, (289), 136 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:06,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 289 transitions. [2021-03-10 22:13:06,923 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 289 transitions. Word has length 19 [2021-03-10 22:13:06,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:13:06,923 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 289 transitions. [2021-03-10 22:13:06,923 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:06,923 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 289 transitions. [2021-03-10 22:13:06,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:13:06,923 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:13:06,923 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:13:07,123 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23295,449 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:13:07,124 INFO L428 AbstractCegarLoop]: === Iteration 455 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:13:07,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:13:07,124 INFO L82 PathProgramCache]: Analyzing trace with hash 1977425668, now seen corresponding path program 449 times [2021-03-10 22:13:07,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:13:07,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239480366] [2021-03-10 22:13:07,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:13:07,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:13:07,232 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:07,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239480366] [2021-03-10 22:13:07,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039722848] [2021-03-10 22:13:07,232 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:13:07,337 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 22:13:07,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:13:07,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:13:07,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:13:07,655 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:07,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:13:07,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-10 22:13:07,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751921125] [2021-03-10 22:13:07,656 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:13:07,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:13:07,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:13:07,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:13:07,656 INFO L87 Difference]: Start difference. First operand 137 states and 289 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:08,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:13:08,023 INFO L93 Difference]: Finished difference Result 164 states and 343 transitions. [2021-03-10 22:13:08,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 22:13:08,024 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:13:08,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:13:08,024 INFO L225 Difference]: With dead ends: 164 [2021-03-10 22:13:08,024 INFO L226 Difference]: Without dead ends: 164 [2021-03-10 22:13:08,024 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 416.2ms TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:13:08,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-03-10 22:13:08,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 134. [2021-03-10 22:13:08,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.1278195488721803) internal successors, (283), 133 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:08,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 283 transitions. [2021-03-10 22:13:08,025 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 283 transitions. Word has length 19 [2021-03-10 22:13:08,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:13:08,025 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 283 transitions. [2021-03-10 22:13:08,025 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:08,025 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 283 transitions. [2021-03-10 22:13:08,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:13:08,026 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:13:08,026 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:13:08,226 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23364,450 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:13:08,226 INFO L428 AbstractCegarLoop]: === Iteration 456 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:13:08,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:13:08,226 INFO L82 PathProgramCache]: Analyzing trace with hash 184546371, now seen corresponding path program 450 times [2021-03-10 22:13:08,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:13:08,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850690486] [2021-03-10 22:13:08,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:13:08,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:13:08,339 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:08,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850690486] [2021-03-10 22:13:08,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049592797] [2021-03-10 22:13:08,339 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:13:08,444 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 22:13:08,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:13:08,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:13:08,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:13:08,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:08,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:08,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:13:08,685 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:08,688 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:13:08,689 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:08,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:08,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:08,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:13:08,694 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:08,696 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:13:08,697 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:08,713 INFO L628 ElimStorePlain]: treesize reduction 4, result has 81.8 percent of original size [2021-03-10 22:13:08,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:13:08,716 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:08,722 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:13:08,723 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:13:08,723 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:114, output treesize:6 [2021-03-10 22:13:08,731 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:08,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:13:08,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-10 22:13:08,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556371775] [2021-03-10 22:13:08,732 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:13:08,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:13:08,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:13:08,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:13:08,732 INFO L87 Difference]: Start difference. First operand 134 states and 283 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:09,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:13:09,140 INFO L93 Difference]: Finished difference Result 180 states and 375 transitions. [2021-03-10 22:13:09,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:13:09,141 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:13:09,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:13:09,141 INFO L225 Difference]: With dead ends: 180 [2021-03-10 22:13:09,141 INFO L226 Difference]: Without dead ends: 180 [2021-03-10 22:13:09,141 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 350.4ms TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:13:09,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-03-10 22:13:09,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 134. [2021-03-10 22:13:09,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.1278195488721803) internal successors, (283), 133 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:09,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 283 transitions. [2021-03-10 22:13:09,143 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 283 transitions. Word has length 19 [2021-03-10 22:13:09,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:13:09,143 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 283 transitions. [2021-03-10 22:13:09,143 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:09,143 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 283 transitions. [2021-03-10 22:13:09,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:13:09,143 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:13:09,143 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:13:09,343 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 451 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23403 [2021-03-10 22:13:09,344 INFO L428 AbstractCegarLoop]: === Iteration 457 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:13:09,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:13:09,344 INFO L82 PathProgramCache]: Analyzing trace with hash 868752281, now seen corresponding path program 451 times [2021-03-10 22:13:09,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:13:09,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304235356] [2021-03-10 22:13:09,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:13:09,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:13:09,463 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:09,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304235356] [2021-03-10 22:13:09,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761954652] [2021-03-10 22:13:09,463 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:13:09,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:13:09,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:13:09,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:13:09,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:13:09,808 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:09,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:13:09,813 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:09,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:09,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:09,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:13:09,818 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:09,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:09,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:13:09,822 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:09,876 INFO L628 ElimStorePlain]: treesize reduction 60, result has 35.5 percent of original size [2021-03-10 22:13:09,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:13:09,880 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:09,915 INFO L628 ElimStorePlain]: treesize reduction 1, result has 96.6 percent of original size [2021-03-10 22:13:09,916 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:13:09,916 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:128, output treesize:12 [2021-03-10 22:13:09,950 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:09,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:13:09,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-10 22:13:09,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893394477] [2021-03-10 22:13:09,950 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:13:09,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:13:09,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:13:09,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:13:09,950 INFO L87 Difference]: Start difference. First operand 134 states and 283 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:10,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:13:10,516 INFO L93 Difference]: Finished difference Result 197 states and 410 transitions. [2021-03-10 22:13:10,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 22:13:10,517 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:13:10,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:13:10,517 INFO L225 Difference]: With dead ends: 197 [2021-03-10 22:13:10,517 INFO L226 Difference]: Without dead ends: 197 [2021-03-10 22:13:10,517 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 541.8ms TimeCoverageRelationStatistics Valid=142, Invalid=670, Unknown=0, NotChecked=0, Total=812 [2021-03-10 22:13:10,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-03-10 22:13:10,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 134. [2021-03-10 22:13:10,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.1278195488721803) internal successors, (283), 133 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:10,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 283 transitions. [2021-03-10 22:13:10,518 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 283 transitions. Word has length 19 [2021-03-10 22:13:10,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:13:10,518 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 283 transitions. [2021-03-10 22:13:10,518 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:10,518 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 283 transitions. [2021-03-10 22:13:10,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:13:10,519 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:13:10,519 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:13:10,719 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 452 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23439 [2021-03-10 22:13:10,719 INFO L428 AbstractCegarLoop]: === Iteration 458 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:13:10,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:13:10,719 INFO L82 PathProgramCache]: Analyzing trace with hash -1277305830, now seen corresponding path program 452 times [2021-03-10 22:13:10,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:13:10,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004820630] [2021-03-10 22:13:10,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:13:10,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:13:10,834 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:10,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004820630] [2021-03-10 22:13:10,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986751081] [2021-03-10 22:13:10,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:13:10,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:13:10,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:13:10,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:13:10,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:13:11,284 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:11,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:13:11,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-10 22:13:11,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975435556] [2021-03-10 22:13:11,285 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:13:11,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:13:11,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:13:11,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:13:11,285 INFO L87 Difference]: Start difference. First operand 134 states and 283 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:11,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:13:11,652 INFO L93 Difference]: Finished difference Result 161 states and 339 transitions. [2021-03-10 22:13:11,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:13:11,653 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:13:11,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:13:11,653 INFO L225 Difference]: With dead ends: 161 [2021-03-10 22:13:11,653 INFO L226 Difference]: Without dead ends: 161 [2021-03-10 22:13:11,653 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 393.8ms TimeCoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:13:11,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-03-10 22:13:11,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 129. [2021-03-10 22:13:11,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.1328125) internal successors, (273), 128 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:11,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 273 transitions. [2021-03-10 22:13:11,654 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 273 transitions. Word has length 19 [2021-03-10 22:13:11,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:13:11,654 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 273 transitions. [2021-03-10 22:13:11,654 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:11,655 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 273 transitions. [2021-03-10 22:13:11,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:13:11,655 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:13:11,655 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:13:11,855 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23483,453 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:13:11,855 INFO L428 AbstractCegarLoop]: === Iteration 459 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:13:11,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:13:11,855 INFO L82 PathProgramCache]: Analyzing trace with hash -242222785, now seen corresponding path program 453 times [2021-03-10 22:13:11,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:13:11,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678828914] [2021-03-10 22:13:11,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:13:11,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:13:11,969 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:11,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678828914] [2021-03-10 22:13:11,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176578155] [2021-03-10 22:13:11,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:13:12,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 22:13:12,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:13:12,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:13:12,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:13:12,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:13:12,310 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:12,315 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:13:12,316 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:12,442 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2021-03-10 22:13:12,442 INFO L628 ElimStorePlain]: treesize reduction 87, result has 48.5 percent of original size [2021-03-10 22:13:12,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:13:12,449 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:12,496 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:13:12,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:13:12,501 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:12,547 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:13:12,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:13:12,552 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:12,595 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:13:12,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:13:12,600 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:12,642 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:13:12,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:13:12,647 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:12,686 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:13:12,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:13:12,691 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:12,729 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:13:12,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:13:12,733 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:12,770 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:13:12,771 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:13:12,771 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:199, output treesize:13 [2021-03-10 22:13:12,816 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:12,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:13:12,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-10 22:13:12,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146532790] [2021-03-10 22:13:12,817 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:13:12,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:13:12,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:13:12,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:13:12,817 INFO L87 Difference]: Start difference. First operand 129 states and 273 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:13,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:13:13,214 INFO L93 Difference]: Finished difference Result 176 states and 358 transitions. [2021-03-10 22:13:13,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 22:13:13,215 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:13:13,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:13:13,215 INFO L225 Difference]: With dead ends: 176 [2021-03-10 22:13:13,215 INFO L226 Difference]: Without dead ends: 176 [2021-03-10 22:13:13,215 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 375.3ms TimeCoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:13:13,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-03-10 22:13:13,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 128. [2021-03-10 22:13:13,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.1338582677165356) internal successors, (271), 127 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) [2021-03-10 22:13:13,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 271 transitions. [2021-03-10 22:13:13,217 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 271 transitions. Word has length 19 [2021-03-10 22:13:13,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:13:13,217 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 271 transitions. [2021-03-10 22:13:13,217 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:13,217 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 271 transitions. [2021-03-10 22:13:13,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:13:13,217 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:13:13,217 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:13:13,417 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 454 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23541 [2021-03-10 22:13:13,417 INFO L428 AbstractCegarLoop]: === Iteration 460 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:13:13,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:13:13,418 INFO L82 PathProgramCache]: Analyzing trace with hash -1224790310, now seen corresponding path program 454 times [2021-03-10 22:13:13,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:13:13,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993091586] [2021-03-10 22:13:13,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:13:13,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:13:13,531 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:13,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993091586] [2021-03-10 22:13:13,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281147620] [2021-03-10 22:13:13,532 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:13:13,640 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:13:13,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:13:13,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:13:13,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:13:13,824 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:13,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:13:13,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-10 22:13:13,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409086959] [2021-03-10 22:13:13,824 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:13:13,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:13:13,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:13:13,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:13:13,824 INFO L87 Difference]: Start difference. First operand 128 states and 271 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:14,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:13:14,278 INFO L93 Difference]: Finished difference Result 171 states and 356 transitions. [2021-03-10 22:13:14,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 22:13:14,278 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:13:14,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:13:14,279 INFO L225 Difference]: With dead ends: 171 [2021-03-10 22:13:14,279 INFO L226 Difference]: Without dead ends: 171 [2021-03-10 22:13:14,279 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 323.3ms TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:13:14,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-03-10 22:13:14,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 128. [2021-03-10 22:13:14,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.1338582677165356) internal successors, (271), 127 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) [2021-03-10 22:13:14,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 271 transitions. [2021-03-10 22:13:14,280 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 271 transitions. Word has length 19 [2021-03-10 22:13:14,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:13:14,280 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 271 transitions. [2021-03-10 22:13:14,280 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:14,280 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 271 transitions. [2021-03-10 22:13:14,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:13:14,280 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:13:14,280 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:13:14,495 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23561,455 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:13:14,495 INFO L428 AbstractCegarLoop]: === Iteration 461 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:13:14,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:13:14,495 INFO L82 PathProgramCache]: Analyzing trace with hash -1589510845, now seen corresponding path program 455 times [2021-03-10 22:13:14,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:13:14,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770828256] [2021-03-10 22:13:14,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:13:14,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:13:14,603 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:14,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770828256] [2021-03-10 22:13:14,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506885350] [2021-03-10 22:13:14,604 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:13:14,711 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:13:14,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:13:14,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:13:14,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:13:15,019 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:15,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:13:15,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-10 22:13:15,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103105937] [2021-03-10 22:13:15,020 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:13:15,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:13:15,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:13:15,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:13:15,020 INFO L87 Difference]: Start difference. First operand 128 states and 271 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:15,495 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 27 [2021-03-10 22:13:15,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:13:15,507 INFO L93 Difference]: Finished difference Result 145 states and 301 transitions. [2021-03-10 22:13:15,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:13:15,508 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:13:15,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:13:15,508 INFO L225 Difference]: With dead ends: 145 [2021-03-10 22:13:15,508 INFO L226 Difference]: Without dead ends: 141 [2021-03-10 22:13:15,508 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 459.6ms TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:13:15,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-03-10 22:13:15,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 126. [2021-03-10 22:13:15,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.128) internal successors, (266), 125 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:15,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 266 transitions. [2021-03-10 22:13:15,510 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 266 transitions. Word has length 19 [2021-03-10 22:13:15,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:13:15,510 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 266 transitions. [2021-03-10 22:13:15,510 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:15,510 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 266 transitions. [2021-03-10 22:13:15,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:13:15,510 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:13:15,510 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:13:15,710 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 456 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23577 [2021-03-10 22:13:15,710 INFO L428 AbstractCegarLoop]: === Iteration 462 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:13:15,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:13:15,711 INFO L82 PathProgramCache]: Analyzing trace with hash -1927882259, now seen corresponding path program 456 times [2021-03-10 22:13:15,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:13:15,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774802412] [2021-03-10 22:13:15,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:13:15,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:13:15,826 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:15,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774802412] [2021-03-10 22:13:15,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009298406] [2021-03-10 22:13:15,826 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:13:15,935 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 22:13:15,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:13:15,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:13:15,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:13:16,155 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:13:16,156 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:16,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:16,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:16,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:13:16,161 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:16,164 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:13:16,165 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:16,167 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:16,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:13:16,169 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:16,185 INFO L628 ElimStorePlain]: treesize reduction 4, result has 81.8 percent of original size [2021-03-10 22:13:16,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:13:16,188 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:16,194 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:13:16,195 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:13:16,195 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:114, output treesize:6 [2021-03-10 22:13:16,203 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:16,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:13:16,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-10 22:13:16,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716643708] [2021-03-10 22:13:16,204 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:13:16,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:13:16,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:13:16,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:13:16,204 INFO L87 Difference]: Start difference. First operand 126 states and 266 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:16,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:13:16,649 INFO L93 Difference]: Finished difference Result 174 states and 362 transitions. [2021-03-10 22:13:16,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:13:16,650 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:13:16,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:13:16,650 INFO L225 Difference]: With dead ends: 174 [2021-03-10 22:13:16,650 INFO L226 Difference]: Without dead ends: 174 [2021-03-10 22:13:16,650 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 334.1ms TimeCoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:13:16,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-03-10 22:13:16,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 128. [2021-03-10 22:13:16,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.125984251968504) internal successors, (270), 127 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:16,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 270 transitions. [2021-03-10 22:13:16,651 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 270 transitions. Word has length 19 [2021-03-10 22:13:16,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:13:16,651 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 270 transitions. [2021-03-10 22:13:16,651 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:16,651 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 270 transitions. [2021-03-10 22:13:16,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:13:16,651 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:13:16,651 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:13:16,852 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 457 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23606 [2021-03-10 22:13:16,852 INFO L428 AbstractCegarLoop]: === Iteration 463 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:13:16,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:13:16,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1352570559, now seen corresponding path program 457 times [2021-03-10 22:13:16,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:13:16,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955462251] [2021-03-10 22:13:16,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:13:16,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:13:16,965 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:16,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955462251] [2021-03-10 22:13:16,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31429455] [2021-03-10 22:13:16,965 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:13:17,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:13:17,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:13:17,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:13:17,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:17,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:17,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:13:17,320 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:17,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:13:17,325 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:17,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:13:17,329 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:17,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:17,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:13:17,333 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:17,387 INFO L628 ElimStorePlain]: treesize reduction 60, result has 35.5 percent of original size [2021-03-10 22:13:17,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:13:17,390 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:17,426 INFO L628 ElimStorePlain]: treesize reduction 1, result has 96.6 percent of original size [2021-03-10 22:13:17,427 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:13:17,427 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:128, output treesize:12 [2021-03-10 22:13:17,461 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:17,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:13:17,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-10 22:13:17,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404516291] [2021-03-10 22:13:17,462 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:13:17,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:13:17,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:13:17,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:13:17,462 INFO L87 Difference]: Start difference. First operand 128 states and 270 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:17,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:13:17,839 INFO L93 Difference]: Finished difference Result 190 states and 394 transitions. [2021-03-10 22:13:17,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:13:17,840 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:13:17,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:13:17,840 INFO L225 Difference]: With dead ends: 190 [2021-03-10 22:13:17,840 INFO L226 Difference]: Without dead ends: 190 [2021-03-10 22:13:17,840 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 321.9ms TimeCoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:13:17,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-03-10 22:13:17,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 129. [2021-03-10 22:13:17,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.125) internal successors, (272), 128 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:17,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 272 transitions. [2021-03-10 22:13:17,841 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 272 transitions. Word has length 19 [2021-03-10 22:13:17,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:13:17,841 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 272 transitions. [2021-03-10 22:13:17,841 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:17,841 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 272 transitions. [2021-03-10 22:13:17,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:13:17,842 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:13:17,842 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:13:18,047 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23637,458 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:13:18,047 INFO L428 AbstractCegarLoop]: === Iteration 464 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:13:18,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:13:18,047 INFO L82 PathProgramCache]: Analyzing trace with hash 905232836, now seen corresponding path program 458 times [2021-03-10 22:13:18,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:13:18,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610724019] [2021-03-10 22:13:18,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:13:18,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:13:18,160 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:18,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610724019] [2021-03-10 22:13:18,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116218125] [2021-03-10 22:13:18,161 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:13:18,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:13:18,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:13:18,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:13:18,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:13:18,578 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:18,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:13:18,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-10 22:13:18,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951576313] [2021-03-10 22:13:18,578 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:13:18,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:13:18,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:13:18,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:13:18,578 INFO L87 Difference]: Start difference. First operand 129 states and 272 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:18,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:13:18,911 INFO L93 Difference]: Finished difference Result 157 states and 328 transitions. [2021-03-10 22:13:18,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:13:18,911 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:13:18,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:13:18,912 INFO L225 Difference]: With dead ends: 157 [2021-03-10 22:13:18,912 INFO L226 Difference]: Without dead ends: 157 [2021-03-10 22:13:18,912 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 332.0ms TimeCoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:13:18,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-03-10 22:13:18,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 127. [2021-03-10 22:13:18,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 2.126984126984127) internal successors, (268), 126 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:18,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 268 transitions. [2021-03-10 22:13:18,913 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 268 transitions. Word has length 19 [2021-03-10 22:13:18,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:13:18,913 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 268 transitions. [2021-03-10 22:13:18,913 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:18,913 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 268 transitions. [2021-03-10 22:13:18,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:13:18,913 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:13:18,913 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:13:19,113 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23680,459 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:13:19,114 INFO L428 AbstractCegarLoop]: === Iteration 465 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:13:19,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:13:19,114 INFO L82 PathProgramCache]: Analyzing trace with hash -655931027, now seen corresponding path program 459 times [2021-03-10 22:13:19,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:13:19,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74153982] [2021-03-10 22:13:19,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:13:19,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:13:19,226 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:19,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74153982] [2021-03-10 22:13:19,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437643141] [2021-03-10 22:13:19,227 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:13:19,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 22:13:19,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:13:19,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:13:19,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:13:19,563 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:19,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:19,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:13:19,565 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:19,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:13:19,571 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:19,701 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2021-03-10 22:13:19,701 INFO L628 ElimStorePlain]: treesize reduction 86, result has 48.8 percent of original size [2021-03-10 22:13:19,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:13:19,706 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:19,753 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:13:19,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:13:19,758 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:19,804 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:13:19,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:13:19,809 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:19,852 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:13:19,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:13:19,857 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:19,899 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:13:19,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:13:19,903 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:19,943 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:13:19,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:13:19,948 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:19,987 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:13:19,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:13:19,992 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:20,030 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:13:20,031 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:13:20,031 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:199, output treesize:13 [2021-03-10 22:13:20,076 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:20,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:13:20,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-10 22:13:20,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585314049] [2021-03-10 22:13:20,076 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:13:20,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:13:20,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:13:20,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:13:20,077 INFO L87 Difference]: Start difference. First operand 127 states and 268 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:20,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:13:20,452 INFO L93 Difference]: Finished difference Result 172 states and 352 transitions. [2021-03-10 22:13:20,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:13:20,452 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:13:20,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:13:20,452 INFO L225 Difference]: With dead ends: 172 [2021-03-10 22:13:20,452 INFO L226 Difference]: Without dead ends: 172 [2021-03-10 22:13:20,453 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 387.3ms TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:13:20,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-03-10 22:13:20,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 129. [2021-03-10 22:13:20,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.1328125) internal successors, (273), 128 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:20,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 273 transitions. [2021-03-10 22:13:20,454 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 273 transitions. Word has length 19 [2021-03-10 22:13:20,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:13:20,454 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 273 transitions. [2021-03-10 22:13:20,454 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:20,454 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 273 transitions. [2021-03-10 22:13:20,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:13:20,454 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:13:20,454 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:13:20,654 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23726,460 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:13:20,654 INFO L428 AbstractCegarLoop]: === Iteration 466 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:13:20,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:13:20,655 INFO L82 PathProgramCache]: Analyzing trace with hash 1492978158, now seen corresponding path program 460 times [2021-03-10 22:13:20,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:13:20,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859213076] [2021-03-10 22:13:20,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:13:20,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:13:20,768 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:20,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859213076] [2021-03-10 22:13:20,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297838557] [2021-03-10 22:13:20,769 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:13:20,878 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:13:20,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:13:20,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:13:20,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:13:21,192 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:21,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:13:21,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-10 22:13:21,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505432981] [2021-03-10 22:13:21,192 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:13:21,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:13:21,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:13:21,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:13:21,193 INFO L87 Difference]: Start difference. First operand 129 states and 273 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:21,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:13:21,726 INFO L93 Difference]: Finished difference Result 211 states and 427 transitions. [2021-03-10 22:13:21,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 22:13:21,727 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:13:21,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:13:21,727 INFO L225 Difference]: With dead ends: 211 [2021-03-10 22:13:21,727 INFO L226 Difference]: Without dead ends: 211 [2021-03-10 22:13:21,727 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 479.1ms TimeCoverageRelationStatistics Valid=134, Invalid=622, Unknown=0, NotChecked=0, Total=756 [2021-03-10 22:13:21,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-03-10 22:13:21,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 130. [2021-03-10 22:13:21,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 2.1550387596899223) internal successors, (278), 129 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:21,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 278 transitions. [2021-03-10 22:13:21,729 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 278 transitions. Word has length 19 [2021-03-10 22:13:21,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:13:21,729 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 278 transitions. [2021-03-10 22:13:21,729 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:21,729 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 278 transitions. [2021-03-10 22:13:21,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:13:21,729 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:13:21,729 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:13:21,929 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 461 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23748 [2021-03-10 22:13:21,930 INFO L428 AbstractCegarLoop]: === Iteration 467 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:13:21,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:13:21,930 INFO L82 PathProgramCache]: Analyzing trace with hash 957748356, now seen corresponding path program 461 times [2021-03-10 22:13:21,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:13:21,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994248112] [2021-03-10 22:13:21,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:13:21,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:13:22,042 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:22,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994248112] [2021-03-10 22:13:22,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939906897] [2021-03-10 22:13:22,042 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 462 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 462 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:13:22,149 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 22:13:22,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:13:22,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:13:22,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:13:22,339 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:22,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:13:22,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-10 22:13:22,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338813271] [2021-03-10 22:13:22,340 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:13:22,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:13:22,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:13:22,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:13:22,340 INFO L87 Difference]: Start difference. First operand 130 states and 278 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:22,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:13:22,722 INFO L93 Difference]: Finished difference Result 169 states and 352 transitions. [2021-03-10 22:13:22,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:13:22,722 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:13:22,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:13:22,723 INFO L225 Difference]: With dead ends: 169 [2021-03-10 22:13:22,723 INFO L226 Difference]: Without dead ends: 169 [2021-03-10 22:13:22,723 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 329.7ms TimeCoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:13:22,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-03-10 22:13:22,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 128. [2021-03-10 22:13:22,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.1338582677165356) internal successors, (271), 127 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) [2021-03-10 22:13:22,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 271 transitions. [2021-03-10 22:13:22,724 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 271 transitions. Word has length 19 [2021-03-10 22:13:22,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:13:22,724 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 271 transitions. [2021-03-10 22:13:22,724 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:22,724 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 271 transitions. [2021-03-10 22:13:22,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:13:22,724 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:13:22,724 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:13:22,925 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23792,462 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:13:22,925 INFO L428 AbstractCegarLoop]: === Iteration 468 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:13:22,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:13:22,925 INFO L82 PathProgramCache]: Analyzing trace with hash 593027821, now seen corresponding path program 462 times [2021-03-10 22:13:22,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:13:22,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790175627] [2021-03-10 22:13:22,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:13:22,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:13:23,032 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:23,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790175627] [2021-03-10 22:13:23,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624535677] [2021-03-10 22:13:23,032 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 463 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 463 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:13:23,138 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:13:23,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:13:23,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:13:23,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:13:23,376 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:23,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:13:23,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-10 22:13:23,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371346680] [2021-03-10 22:13:23,376 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:13:23,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:13:23,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:13:23,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:13:23,376 INFO L87 Difference]: Start difference. First operand 128 states and 271 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:23,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:13:23,770 INFO L93 Difference]: Finished difference Result 143 states and 297 transitions. [2021-03-10 22:13:23,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:13:23,770 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:13:23,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:13:23,771 INFO L225 Difference]: With dead ends: 143 [2021-03-10 22:13:23,771 INFO L226 Difference]: Without dead ends: 139 [2021-03-10 22:13:23,771 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 394.6ms TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:13:23,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-03-10 22:13:23,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 126. [2021-03-10 22:13:23,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.128) internal successors, (266), 125 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:23,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 266 transitions. [2021-03-10 22:13:23,772 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 266 transitions. Word has length 19 [2021-03-10 22:13:23,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:13:23,772 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 266 transitions. [2021-03-10 22:13:23,772 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:23,772 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 266 transitions. [2021-03-10 22:13:23,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:13:23,772 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:13:23,772 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:13:23,972 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23809,463 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:13:23,973 INFO L428 AbstractCegarLoop]: === Iteration 469 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:13:23,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:13:23,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1314415617, now seen corresponding path program 463 times [2021-03-10 22:13:23,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:13:23,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316708102] [2021-03-10 22:13:23,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:13:23,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:13:24,081 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:24,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316708102] [2021-03-10 22:13:24,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265048253] [2021-03-10 22:13:24,082 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 464 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 464 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:13:24,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:13:24,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:13:24,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:13:24,477 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 4 treesize of output 2 [2021-03-10 22:13:24,478 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:24,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:24,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:13:24,484 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:24,622 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 48 [2021-03-10 22:13:24,622 INFO L628 ElimStorePlain]: treesize reduction 106, result has 43.3 percent of original size [2021-03-10 22:13:24,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:13:24,627 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:24,674 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:13:24,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:13:24,680 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:24,725 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:13:24,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:13:24,730 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:24,773 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:13:24,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:13:24,778 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:24,820 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:13:24,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:13:24,825 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:24,865 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:13:24,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:13:24,870 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:24,908 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:13:24,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:13:24,913 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:24,949 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:13:24,950 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:13:24,950 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:199, output treesize:13 [2021-03-10 22:13:24,996 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:24,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:13:24,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-10 22:13:24,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388873909] [2021-03-10 22:13:24,996 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:13:24,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:13:24,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:13:24,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:13:24,997 INFO L87 Difference]: Start difference. First operand 126 states and 266 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:25,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:13:25,347 INFO L93 Difference]: Finished difference Result 174 states and 352 transitions. [2021-03-10 22:13:25,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:13:25,347 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:13:25,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:13:25,348 INFO L225 Difference]: With dead ends: 174 [2021-03-10 22:13:25,348 INFO L226 Difference]: Without dead ends: 174 [2021-03-10 22:13:25,348 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 399.2ms TimeCoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:13:25,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-03-10 22:13:25,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 126. [2021-03-10 22:13:25,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.128) internal successors, (266), 125 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:25,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 266 transitions. [2021-03-10 22:13:25,349 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 266 transitions. Word has length 19 [2021-03-10 22:13:25,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:13:25,349 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 266 transitions. [2021-03-10 22:13:25,349 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:25,349 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 266 transitions. [2021-03-10 22:13:25,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:13:25,349 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:13:25,349 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:13:25,550 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 464 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23827 [2021-03-10 22:13:25,550 INFO L428 AbstractCegarLoop]: === Iteration 470 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:13:25,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:13:25,550 INFO L82 PathProgramCache]: Analyzing trace with hash -63032952, now seen corresponding path program 464 times [2021-03-10 22:13:25,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:13:25,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848491816] [2021-03-10 22:13:25,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:13:25,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:13:25,662 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:25,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848491816] [2021-03-10 22:13:25,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609253088] [2021-03-10 22:13:25,662 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 465 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 465 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:13:25,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:13:25,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:13:25,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:13:25,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:13:26,133 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:26,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:13:26,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-10 22:13:26,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195640242] [2021-03-10 22:13:26,134 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:13:26,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:13:26,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:13:26,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:13:26,134 INFO L87 Difference]: Start difference. First operand 126 states and 266 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:26,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:13:26,955 INFO L93 Difference]: Finished difference Result 235 states and 477 transitions. [2021-03-10 22:13:26,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 22:13:26,956 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:13:26,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:13:26,957 INFO L225 Difference]: With dead ends: 235 [2021-03-10 22:13:26,957 INFO L226 Difference]: Without dead ends: 235 [2021-03-10 22:13:26,957 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 753.2ms TimeCoverageRelationStatistics Valid=175, Invalid=881, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 22:13:26,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-03-10 22:13:26,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 128. [2021-03-10 22:13:26,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.15748031496063) internal successors, (274), 127 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:26,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 274 transitions. [2021-03-10 22:13:26,958 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 274 transitions. Word has length 19 [2021-03-10 22:13:26,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:13:26,958 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 274 transitions. [2021-03-10 22:13:26,958 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:26,958 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 274 transitions. [2021-03-10 22:13:26,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:13:26,958 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:13:26,958 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:13:27,159 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23848,465 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:13:27,159 INFO L428 AbstractCegarLoop]: === Iteration 471 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:13:27,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:13:27,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1997984154, now seen corresponding path program 465 times [2021-03-10 22:13:27,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:13:27,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477336438] [2021-03-10 22:13:27,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:13:27,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:13:27,266 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:27,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477336438] [2021-03-10 22:13:27,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725029005] [2021-03-10 22:13:27,266 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 466 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 466 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:13:27,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 22:13:27,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:13:27,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:13:27,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:13:27,588 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:27,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:13:27,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-10 22:13:27,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851005896] [2021-03-10 22:13:27,589 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:13:27,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:13:27,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:13:27,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:13:27,589 INFO L87 Difference]: Start difference. First operand 128 states and 274 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:28,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:13:28,183 INFO L93 Difference]: Finished difference Result 196 states and 409 transitions. [2021-03-10 22:13:28,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 22:13:28,184 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:13:28,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:13:28,184 INFO L225 Difference]: With dead ends: 196 [2021-03-10 22:13:28,184 INFO L226 Difference]: Without dead ends: 196 [2021-03-10 22:13:28,184 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 513.6ms TimeCoverageRelationStatistics Valid=121, Invalid=691, Unknown=0, NotChecked=0, Total=812 [2021-03-10 22:13:28,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-03-10 22:13:28,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 128. [2021-03-10 22:13:28,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.15748031496063) internal successors, (274), 127 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:28,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 274 transitions. [2021-03-10 22:13:28,186 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 274 transitions. Word has length 19 [2021-03-10 22:13:28,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:13:28,186 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 274 transitions. [2021-03-10 22:13:28,186 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:28,186 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 274 transitions. [2021-03-10 22:13:28,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:13:28,186 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:13:28,186 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:13:28,386 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 466 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23909 [2021-03-10 22:13:28,386 INFO L428 AbstractCegarLoop]: === Iteration 472 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:13:28,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:13:28,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1633263619, now seen corresponding path program 466 times [2021-03-10 22:13:28,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:13:28,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388539826] [2021-03-10 22:13:28,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:13:28,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:13:28,489 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:28,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388539826] [2021-03-10 22:13:28,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128945922] [2021-03-10 22:13:28,489 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 467 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 467 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:13:28,596 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:13:28,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:13:28,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:13:28,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:13:28,957 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:28,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:13:28,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-10 22:13:28,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463690990] [2021-03-10 22:13:28,958 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:13:28,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:13:28,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:13:28,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:13:28,958 INFO L87 Difference]: Start difference. First operand 128 states and 274 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:29,441 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 41 [2021-03-10 22:13:29,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:13:29,452 INFO L93 Difference]: Finished difference Result 156 states and 324 transitions. [2021-03-10 22:13:29,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:13:29,453 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:13:29,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:13:29,453 INFO L225 Difference]: With dead ends: 156 [2021-03-10 22:13:29,453 INFO L226 Difference]: Without dead ends: 152 [2021-03-10 22:13:29,453 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 526.5ms TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:13:29,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-03-10 22:13:29,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 127. [2021-03-10 22:13:29,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 2.1507936507936507) internal successors, (271), 126 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:29,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 271 transitions. [2021-03-10 22:13:29,454 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 271 transitions. Word has length 19 [2021-03-10 22:13:29,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:13:29,454 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 271 transitions. [2021-03-10 22:13:29,455 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:29,455 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 271 transitions. [2021-03-10 22:13:29,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:13:29,455 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:13:29,455 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:13:29,669 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23929,467 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:13:29,669 INFO L428 AbstractCegarLoop]: === Iteration 473 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:13:29,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:13:29,670 INFO L82 PathProgramCache]: Analyzing trace with hash -1709237820, now seen corresponding path program 467 times [2021-03-10 22:13:29,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:13:29,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805515810] [2021-03-10 22:13:29,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:13:29,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:13:29,782 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:29,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805515810] [2021-03-10 22:13:29,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372425678] [2021-03-10 22:13:29,782 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 468 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 468 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:13:29,891 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 22:13:29,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:13:29,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:13:29,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:13:30,119 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:30,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:13:30,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-03-10 22:13:30,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612699330] [2021-03-10 22:13:30,119 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:13:30,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:13:30,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:13:30,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:13:30,120 INFO L87 Difference]: Start difference. First operand 127 states and 271 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:30,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:13:30,505 INFO L93 Difference]: Finished difference Result 174 states and 363 transitions. [2021-03-10 22:13:30,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:13:30,506 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:13:30,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:13:30,506 INFO L225 Difference]: With dead ends: 174 [2021-03-10 22:13:30,506 INFO L226 Difference]: Without dead ends: 174 [2021-03-10 22:13:30,506 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 341.5ms TimeCoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:13:30,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-03-10 22:13:30,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 124. [2021-03-10 22:13:30,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.1219512195121952) internal successors, (261), 123 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:30,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 261 transitions. [2021-03-10 22:13:30,508 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 261 transitions. Word has length 19 [2021-03-10 22:13:30,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:13:30,508 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 261 transitions. [2021-03-10 22:13:30,508 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:30,508 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 261 transitions. [2021-03-10 22:13:30,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:13:30,508 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:13:30,508 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:13:30,708 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23957,468 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:13:30,708 INFO L428 AbstractCegarLoop]: === Iteration 474 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:13:30,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:13:30,708 INFO L82 PathProgramCache]: Analyzing trace with hash 620571087, now seen corresponding path program 468 times [2021-03-10 22:13:30,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:13:30,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808427876] [2021-03-10 22:13:30,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:13:30,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:13:30,806 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:30,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808427876] [2021-03-10 22:13:30,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958369589] [2021-03-10 22:13:30,806 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 469 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 469 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:13:30,915 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:13:30,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:13:30,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:13:30,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:13:31,169 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:31,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:13:31,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-10 22:13:31,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745066347] [2021-03-10 22:13:31,170 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:13:31,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:13:31,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:13:31,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:13:31,170 INFO L87 Difference]: Start difference. First operand 124 states and 261 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:31,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:13:31,465 INFO L93 Difference]: Finished difference Result 141 states and 290 transitions. [2021-03-10 22:13:31,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:13:31,466 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:13:31,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:13:31,466 INFO L225 Difference]: With dead ends: 141 [2021-03-10 22:13:31,466 INFO L226 Difference]: Without dead ends: 135 [2021-03-10 22:13:31,466 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 322.8ms TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:13:31,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-03-10 22:13:31,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 122. [2021-03-10 22:13:31,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.115702479338843) internal successors, (256), 121 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:31,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 256 transitions. [2021-03-10 22:13:31,468 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 256 transitions. Word has length 19 [2021-03-10 22:13:31,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:13:31,468 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 256 transitions. [2021-03-10 22:13:31,468 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:31,468 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 256 transitions. [2021-03-10 22:13:31,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:13:31,468 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:13:31,468 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:13:31,668 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 469 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23973 [2021-03-10 22:13:31,668 INFO L428 AbstractCegarLoop]: === Iteration 475 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:13:31,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:13:31,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1306306947, now seen corresponding path program 469 times [2021-03-10 22:13:31,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:13:31,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385136530] [2021-03-10 22:13:31,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:13:31,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:13:31,777 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:31,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385136530] [2021-03-10 22:13:31,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812921162] [2021-03-10 22:13:31,777 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 470 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 470 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:13:31,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:13:31,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:13:31,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:13:32,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:32,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:32,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:13:32,065 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:32,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:32,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:13:32,069 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:32,095 INFO L628 ElimStorePlain]: treesize reduction 25, result has 41.9 percent of original size [2021-03-10 22:13:32,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:13:32,098 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:32,104 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:13:32,105 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:13:32,105 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:71, output treesize:6 [2021-03-10 22:13:32,113 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:32,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:13:32,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-03-10 22:13:32,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849777769] [2021-03-10 22:13:32,114 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:13:32,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:13:32,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:13:32,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:13:32,114 INFO L87 Difference]: Start difference. First operand 122 states and 256 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:32,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:13:32,552 INFO L93 Difference]: Finished difference Result 172 states and 356 transitions. [2021-03-10 22:13:32,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:13:32,552 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:13:32,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:13:32,553 INFO L225 Difference]: With dead ends: 172 [2021-03-10 22:13:32,553 INFO L226 Difference]: Without dead ends: 172 [2021-03-10 22:13:32,553 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 323.6ms TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:13:32,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-03-10 22:13:32,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 123. [2021-03-10 22:13:32,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 2.1147540983606556) internal successors, (258), 122 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:32,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 258 transitions. [2021-03-10 22:13:32,554 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 258 transitions. Word has length 19 [2021-03-10 22:13:32,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:13:32,554 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 258 transitions. [2021-03-10 22:13:32,554 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:32,554 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 258 transitions. [2021-03-10 22:13:32,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:13:32,554 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:13:32,554 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:13:32,754 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 470 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23992 [2021-03-10 22:13:32,755 INFO L428 AbstractCegarLoop]: === Iteration 476 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:13:32,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:13:32,755 INFO L82 PathProgramCache]: Analyzing trace with hash 291792469, now seen corresponding path program 470 times [2021-03-10 22:13:32,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:13:32,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560882741] [2021-03-10 22:13:32,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:13:32,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:13:32,864 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:32,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560882741] [2021-03-10 22:13:32,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069346451] [2021-03-10 22:13:32,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 471 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 471 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:13:32,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:13:32,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:13:32,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:13:32,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:13:33,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:13:33,218 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:33,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:33,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:33,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:13:33,224 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:33,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:33,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:33,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:13:33,229 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:33,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:13:33,233 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:33,287 INFO L628 ElimStorePlain]: treesize reduction 60, result has 35.5 percent of original size [2021-03-10 22:13:33,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:13:33,291 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:33,326 INFO L628 ElimStorePlain]: treesize reduction 1, result has 96.6 percent of original size [2021-03-10 22:13:33,327 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:13:33,327 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:128, output treesize:12 [2021-03-10 22:13:33,362 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:33,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:13:33,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-03-10 22:13:33,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653048011] [2021-03-10 22:13:33,362 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:13:33,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:13:33,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:13:33,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:13:33,362 INFO L87 Difference]: Start difference. First operand 123 states and 258 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:33,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:13:33,742 INFO L93 Difference]: Finished difference Result 188 states and 388 transitions. [2021-03-10 22:13:33,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:13:33,743 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:13:33,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:13:33,744 INFO L225 Difference]: With dead ends: 188 [2021-03-10 22:13:33,744 INFO L226 Difference]: Without dead ends: 188 [2021-03-10 22:13:33,744 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 306.5ms TimeCoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:13:33,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-03-10 22:13:33,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 124. [2021-03-10 22:13:33,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.113821138211382) internal successors, (260), 123 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:33,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 260 transitions. [2021-03-10 22:13:33,745 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 260 transitions. Word has length 19 [2021-03-10 22:13:33,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:13:33,745 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 260 transitions. [2021-03-10 22:13:33,745 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:33,745 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 260 transitions. [2021-03-10 22:13:33,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:13:33,745 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:13:33,745 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:13:33,945 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 471 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24015 [2021-03-10 22:13:33,946 INFO L428 AbstractCegarLoop]: === Iteration 477 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:13:33,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:13:33,946 INFO L82 PathProgramCache]: Analyzing trace with hash -155545254, now seen corresponding path program 471 times [2021-03-10 22:13:33,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:13:33,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543864534] [2021-03-10 22:13:33,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:13:33,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:13:34,055 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:34,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543864534] [2021-03-10 22:13:34,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293812071] [2021-03-10 22:13:34,055 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 472 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 472 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:13:34,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 22:13:34,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:13:34,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:13:34,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:13:34,433 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:34,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:13:34,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-03-10 22:13:34,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991314661] [2021-03-10 22:13:34,434 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:13:34,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:13:34,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:13:34,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:13:34,434 INFO L87 Difference]: Start difference. First operand 124 states and 260 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:34,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:13:34,759 INFO L93 Difference]: Finished difference Result 155 states and 322 transitions. [2021-03-10 22:13:34,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 22:13:34,759 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:13:34,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:13:34,760 INFO L225 Difference]: With dead ends: 155 [2021-03-10 22:13:34,760 INFO L226 Difference]: Without dead ends: 155 [2021-03-10 22:13:34,760 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 313.9ms TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:13:34,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-03-10 22:13:34,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 122. [2021-03-10 22:13:34,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.115702479338843) internal successors, (256), 121 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:34,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 256 transitions. [2021-03-10 22:13:34,761 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 256 transitions. Word has length 19 [2021-03-10 22:13:34,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:13:34,761 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 256 transitions. [2021-03-10 22:13:34,761 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:34,761 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 256 transitions. [2021-03-10 22:13:34,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:13:34,761 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:13:34,761 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:13:34,961 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24064,472 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:13:34,961 INFO L428 AbstractCegarLoop]: === Iteration 478 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:13:34,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:13:34,962 INFO L82 PathProgramCache]: Analyzing trace with hash 879537791, now seen corresponding path program 472 times [2021-03-10 22:13:34,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:13:34,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349538852] [2021-03-10 22:13:34,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:13:34,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:13:35,080 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:35,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349538852] [2021-03-10 22:13:35,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332267010] [2021-03-10 22:13:35,080 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 473 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 473 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:13:35,188 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:13:35,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:13:35,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:13:35,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:13:35,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:35,431 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:35,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:13:35,433 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:35,436 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:13:35,437 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:35,520 INFO L628 ElimStorePlain]: treesize reduction 44, result has 54.6 percent of original size [2021-03-10 22:13:35,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:13:35,525 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:35,556 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:13:35,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:13:35,560 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:35,590 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:13:35,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:13:35,594 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:35,623 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:13:35,624 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:13:35,624 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 7 variables, input treesize:128, output treesize:13 [2021-03-10 22:13:35,673 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:35,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:13:35,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 22:13:35,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506913889] [2021-03-10 22:13:35,674 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:13:35,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:13:35,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:13:35,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:13:35,674 INFO L87 Difference]: Start difference. First operand 122 states and 256 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:36,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:13:36,199 INFO L93 Difference]: Finished difference Result 181 states and 359 transitions. [2021-03-10 22:13:36,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 22:13:36,200 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:13:36,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:13:36,200 INFO L225 Difference]: With dead ends: 181 [2021-03-10 22:13:36,200 INFO L226 Difference]: Without dead ends: 181 [2021-03-10 22:13:36,200 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 540.6ms TimeCoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2021-03-10 22:13:36,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-03-10 22:13:36,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 124. [2021-03-10 22:13:36,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.1219512195121952) internal successors, (261), 123 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:36,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 261 transitions. [2021-03-10 22:13:36,202 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 261 transitions. Word has length 19 [2021-03-10 22:13:36,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:13:36,202 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 261 transitions. [2021-03-10 22:13:36,202 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:36,202 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 261 transitions. [2021-03-10 22:13:36,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:13:36,202 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:13:36,202 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:13:36,402 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24110,473 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:13:36,402 INFO L428 AbstractCegarLoop]: === Iteration 479 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:13:36,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:13:36,403 INFO L82 PathProgramCache]: Analyzing trace with hash 432200068, now seen corresponding path program 473 times [2021-03-10 22:13:36,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:13:36,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553393527] [2021-03-10 22:13:36,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:13:36,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:13:36,522 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:36,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553393527] [2021-03-10 22:13:36,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191680317] [2021-03-10 22:13:36,522 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 474 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 474 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:13:36,635 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 22:13:36,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:13:36,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:13:36,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:13:37,224 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:37,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:13:37,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 22:13:37,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221238096] [2021-03-10 22:13:37,225 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:13:37,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:13:37,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:13:37,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:13:37,225 INFO L87 Difference]: Start difference. First operand 124 states and 261 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:37,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:13:37,941 INFO L93 Difference]: Finished difference Result 222 states and 443 transitions. [2021-03-10 22:13:37,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 22:13:37,942 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:13:37,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:13:37,942 INFO L225 Difference]: With dead ends: 222 [2021-03-10 22:13:37,942 INFO L226 Difference]: Without dead ends: 222 [2021-03-10 22:13:37,942 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 661.5ms TimeCoverageRelationStatistics Valid=180, Invalid=942, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 22:13:37,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-03-10 22:13:37,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 128. [2021-03-10 22:13:37,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.141732283464567) internal successors, (272), 127 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:37,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 272 transitions. [2021-03-10 22:13:37,943 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 272 transitions. Word has length 19 [2021-03-10 22:13:37,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:13:37,943 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 272 transitions. [2021-03-10 22:13:37,943 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:37,943 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 272 transitions. [2021-03-10 22:13:37,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:13:37,944 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:13:37,944 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:13:38,144 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 474 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24129 [2021-03-10 22:13:38,144 INFO L428 AbstractCegarLoop]: === Iteration 480 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:13:38,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:13:38,144 INFO L82 PathProgramCache]: Analyzing trace with hash -103029734, now seen corresponding path program 474 times [2021-03-10 22:13:38,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:13:38,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816828975] [2021-03-10 22:13:38,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:13:38,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:13:38,267 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:38,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816828975] [2021-03-10 22:13:38,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552460060] [2021-03-10 22:13:38,267 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 475 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 475 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:13:38,375 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 22:13:38,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:13:38,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:13:38,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:13:38,583 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:38,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:13:38,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 22:13:38,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163540121] [2021-03-10 22:13:38,583 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:13:38,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:13:38,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:13:38,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:13:38,583 INFO L87 Difference]: Start difference. First operand 128 states and 272 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:39,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:13:39,033 INFO L93 Difference]: Finished difference Result 161 states and 334 transitions. [2021-03-10 22:13:39,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 22:13:39,034 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:13:39,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:13:39,034 INFO L225 Difference]: With dead ends: 161 [2021-03-10 22:13:39,034 INFO L226 Difference]: Without dead ends: 161 [2021-03-10 22:13:39,035 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 433.3ms TimeCoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2021-03-10 22:13:39,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-03-10 22:13:39,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 126. [2021-03-10 22:13:39,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.12) internal successors, (265), 125 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:39,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 265 transitions. [2021-03-10 22:13:39,036 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 265 transitions. Word has length 19 [2021-03-10 22:13:39,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:13:39,036 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 265 transitions. [2021-03-10 22:13:39,036 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:39,036 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 265 transitions. [2021-03-10 22:13:39,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:13:39,036 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:13:39,036 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:13:39,236 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24222,475 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:13:39,236 INFO L428 AbstractCegarLoop]: === Iteration 481 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:13:39,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:13:39,237 INFO L82 PathProgramCache]: Analyzing trace with hash -467750269, now seen corresponding path program 475 times [2021-03-10 22:13:39,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:13:39,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696098211] [2021-03-10 22:13:39,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:13:39,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:13:39,354 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:39,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696098211] [2021-03-10 22:13:39,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342477163] [2021-03-10 22:13:39,355 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 476 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 476 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:13:39,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:13:39,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:13:39,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:13:39,720 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:39,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:13:39,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 22:13:39,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653835759] [2021-03-10 22:13:39,721 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:13:39,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:13:39,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:13:39,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:13:39,721 INFO L87 Difference]: Start difference. First operand 126 states and 265 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:40,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:13:40,131 INFO L93 Difference]: Finished difference Result 140 states and 289 transitions. [2021-03-10 22:13:40,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:13:40,131 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:13:40,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:13:40,131 INFO L225 Difference]: With dead ends: 140 [2021-03-10 22:13:40,131 INFO L226 Difference]: Without dead ends: 136 [2021-03-10 22:13:40,131 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 429.9ms TimeCoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:13:40,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-03-10 22:13:40,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 124. [2021-03-10 22:13:40,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.113821138211382) internal successors, (260), 123 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:40,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 260 transitions. [2021-03-10 22:13:40,133 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 260 transitions. Word has length 19 [2021-03-10 22:13:40,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:13:40,133 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 260 transitions. [2021-03-10 22:13:40,133 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:40,133 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 260 transitions. [2021-03-10 22:13:40,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:13:40,133 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:13:40,133 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:13:40,333 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 476 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24239 [2021-03-10 22:13:40,333 INFO L428 AbstractCegarLoop]: === Iteration 482 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:13:40,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:13:40,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1919773589, now seen corresponding path program 476 times [2021-03-10 22:13:40,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:13:40,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221757848] [2021-03-10 22:13:40,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:13:40,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:13:40,450 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:40,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221757848] [2021-03-10 22:13:40,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764444637] [2021-03-10 22:13:40,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 477 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 477 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:13:40,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:13:40,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:13:40,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:13:40,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:13:40,878 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:13:40,879 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:40,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:13:40,885 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:41,019 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2021-03-10 22:13:41,020 INFO L628 ElimStorePlain]: treesize reduction 87, result has 48.5 percent of original size [2021-03-10 22:13:41,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:13:41,025 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:41,073 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:13:41,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:13:41,078 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:41,125 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:13:41,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:13:41,130 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:41,175 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:13:41,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:13:41,180 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:41,223 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:13:41,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:13:41,228 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:41,269 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:13:41,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:13:41,274 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:41,313 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:13:41,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:13:41,318 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:41,356 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:13:41,357 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:13:41,357 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:199, output treesize:13 [2021-03-10 22:13:41,406 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:41,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:13:41,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 22:13:41,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867060404] [2021-03-10 22:13:41,407 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:13:41,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:13:41,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:13:41,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:13:41,407 INFO L87 Difference]: Start difference. First operand 124 states and 260 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:41,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:13:41,890 INFO L93 Difference]: Finished difference Result 154 states and 312 transitions. [2021-03-10 22:13:41,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:13:41,891 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:13:41,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:13:41,891 INFO L225 Difference]: With dead ends: 154 [2021-03-10 22:13:41,891 INFO L226 Difference]: Without dead ends: 154 [2021-03-10 22:13:41,891 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 570.6ms TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:13:41,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-03-10 22:13:41,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 127. [2021-03-10 22:13:41,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 2.126984126984127) internal successors, (268), 126 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:41,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 268 transitions. [2021-03-10 22:13:41,893 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 268 transitions. Word has length 19 [2021-03-10 22:13:41,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:13:41,893 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 268 transitions. [2021-03-10 22:13:41,893 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:41,893 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 268 transitions. [2021-03-10 22:13:41,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:13:41,893 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:13:41,893 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:13:42,093 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 477 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24256 [2021-03-10 22:13:42,093 INFO L428 AbstractCegarLoop]: === Iteration 483 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:13:42,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:13:42,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1472435866, now seen corresponding path program 477 times [2021-03-10 22:13:42,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:13:42,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677657065] [2021-03-10 22:13:42,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:13:42,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:13:42,212 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:42,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677657065] [2021-03-10 22:13:42,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821576889] [2021-03-10 22:13:42,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 478 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 478 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:13:42,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 22:13:42,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:13:42,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:13:42,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:13:42,652 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:42,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:13:42,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 22:13:42,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541948464] [2021-03-10 22:13:42,652 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:13:42,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:13:42,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:13:42,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:13:42,653 INFO L87 Difference]: Start difference. First operand 127 states and 268 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:43,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:13:43,370 INFO L93 Difference]: Finished difference Result 213 states and 422 transitions. [2021-03-10 22:13:43,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 22:13:43,370 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:13:43,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:13:43,371 INFO L225 Difference]: With dead ends: 213 [2021-03-10 22:13:43,371 INFO L226 Difference]: Without dead ends: 213 [2021-03-10 22:13:43,371 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 697.1ms TimeCoverageRelationStatistics Valid=147, Invalid=723, Unknown=0, NotChecked=0, Total=870 [2021-03-10 22:13:43,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-03-10 22:13:43,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 129. [2021-03-10 22:13:43,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.15625) internal successors, (276), 128 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:43,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 276 transitions. [2021-03-10 22:13:43,372 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 276 transitions. Word has length 19 [2021-03-10 22:13:43,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:13:43,372 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 276 transitions. [2021-03-10 22:13:43,372 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:43,372 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 276 transitions. [2021-03-10 22:13:43,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:13:43,372 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:13:43,372 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:13:43,573 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 478 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24278 [2021-03-10 22:13:43,573 INFO L428 AbstractCegarLoop]: === Iteration 484 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:13:43,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:13:43,573 INFO L82 PathProgramCache]: Analyzing trace with hash 937206064, now seen corresponding path program 478 times [2021-03-10 22:13:43,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:13:43,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731408761] [2021-03-10 22:13:43,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:13:43,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:13:43,700 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:43,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731408761] [2021-03-10 22:13:43,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482128496] [2021-03-10 22:13:43,701 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 479 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 479 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:13:43,810 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:13:43,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:13:43,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:13:43,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:13:44,045 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:44,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:13:44,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 22:13:44,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891995767] [2021-03-10 22:13:44,045 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:13:44,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:13:44,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:13:44,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:13:44,046 INFO L87 Difference]: Start difference. First operand 129 states and 276 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:44,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:13:44,521 INFO L93 Difference]: Finished difference Result 164 states and 342 transitions. [2021-03-10 22:13:44,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:13:44,522 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:13:44,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:13:44,522 INFO L225 Difference]: With dead ends: 164 [2021-03-10 22:13:44,522 INFO L226 Difference]: Without dead ends: 164 [2021-03-10 22:13:44,523 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 452.3ms TimeCoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:13:44,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-03-10 22:13:44,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 129. [2021-03-10 22:13:44,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.15625) internal successors, (276), 128 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:44,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 276 transitions. [2021-03-10 22:13:44,524 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 276 transitions. Word has length 19 [2021-03-10 22:13:44,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:13:44,524 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 276 transitions. [2021-03-10 22:13:44,524 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:44,524 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 276 transitions. [2021-03-10 22:13:44,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:13:44,524 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:13:44,524 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:13:44,724 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 479 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24312 [2021-03-10 22:13:44,724 INFO L428 AbstractCegarLoop]: === Iteration 485 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:13:44,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:13:44,725 INFO L82 PathProgramCache]: Analyzing trace with hash 572485529, now seen corresponding path program 479 times [2021-03-10 22:13:44,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:13:44,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439640279] [2021-03-10 22:13:44,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:13:44,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:13:44,836 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:44,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439640279] [2021-03-10 22:13:44,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971177896] [2021-03-10 22:13:44,836 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 480 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 480 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:13:44,945 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:13:44,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:13:44,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:13:44,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:13:45,270 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:45,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:13:45,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 22:13:45,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436567198] [2021-03-10 22:13:45,270 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:13:45,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:13:45,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:13:45,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:13:45,271 INFO L87 Difference]: Start difference. First operand 129 states and 276 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:45,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:13:45,754 INFO L93 Difference]: Finished difference Result 147 states and 307 transitions. [2021-03-10 22:13:45,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:13:45,754 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:13:45,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:13:45,754 INFO L225 Difference]: With dead ends: 147 [2021-03-10 22:13:45,754 INFO L226 Difference]: Without dead ends: 141 [2021-03-10 22:13:45,754 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 522.5ms TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:13:45,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-03-10 22:13:45,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 128. [2021-03-10 22:13:45,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.141732283464567) internal successors, (272), 127 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:45,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 272 transitions. [2021-03-10 22:13:45,755 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 272 transitions. Word has length 19 [2021-03-10 22:13:45,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:13:45,756 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 272 transitions. [2021-03-10 22:13:45,756 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:45,756 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 272 transitions. [2021-03-10 22:13:45,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:13:45,756 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:13:45,756 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:13:45,956 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24332,480 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:13:45,956 INFO L428 AbstractCegarLoop]: === Iteration 486 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:13:45,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:13:45,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1524951386, now seen corresponding path program 480 times [2021-03-10 22:13:45,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:13:45,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150450971] [2021-03-10 22:13:45,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:13:45,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:13:46,071 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:46,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150450971] [2021-03-10 22:13:46,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260943689] [2021-03-10 22:13:46,071 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 481 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 481 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:13:46,184 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:13:46,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:13:46,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:13:46,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:13:46,415 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:46,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:13:46,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-03-10 22:13:46,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298786090] [2021-03-10 22:13:46,416 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:13:46,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:13:46,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:13:46,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:13:46,416 INFO L87 Difference]: Start difference. First operand 128 states and 272 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:46,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:13:46,744 INFO L93 Difference]: Finished difference Result 158 states and 328 transitions. [2021-03-10 22:13:46,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:13:46,745 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:13:46,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:13:46,745 INFO L225 Difference]: With dead ends: 158 [2021-03-10 22:13:46,746 INFO L226 Difference]: Without dead ends: 158 [2021-03-10 22:13:46,746 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 273.7ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:13:46,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-03-10 22:13:46,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 123. [2021-03-10 22:13:46,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 2.1147540983606556) internal successors, (258), 122 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:46,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 258 transitions. [2021-03-10 22:13:46,747 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 258 transitions. Word has length 19 [2021-03-10 22:13:46,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:13:46,747 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 258 transitions. [2021-03-10 22:13:46,747 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:46,747 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 258 transitions. [2021-03-10 22:13:46,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:13:46,747 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:13:46,747 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:13:46,947 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24351,481 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:13:46,947 INFO L428 AbstractCegarLoop]: === Iteration 487 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:13:46,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:13:46,948 INFO L82 PathProgramCache]: Analyzing trace with hash -192655041, now seen corresponding path program 481 times [2021-03-10 22:13:46,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:13:46,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833615330] [2021-03-10 22:13:46,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:13:46,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:13:47,074 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:47,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833615330] [2021-03-10 22:13:47,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385221739] [2021-03-10 22:13:47,075 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 482 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 482 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:13:47,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:13:47,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:13:47,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:13:47,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:47,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:47,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:13:47,598 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:47,603 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:13:47,604 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:47,736 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 48 [2021-03-10 22:13:47,736 INFO L628 ElimStorePlain]: treesize reduction 87, result has 48.2 percent of original size [2021-03-10 22:13:47,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:13:47,742 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:47,790 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:13:47,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:13:47,795 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:47,842 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:13:47,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:13:47,847 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:47,892 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:13:47,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:13:47,898 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:47,941 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:13:47,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:13:47,946 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:47,987 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:13:47,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:13:47,992 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:48,032 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:13:48,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:13:48,037 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:48,075 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:13:48,076 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:13:48,076 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:199, output treesize:13 [2021-03-10 22:13:48,127 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:48,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:13:48,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 22:13:48,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603998916] [2021-03-10 22:13:48,127 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:13:48,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:13:48,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:13:48,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:13:48,127 INFO L87 Difference]: Start difference. First operand 123 states and 258 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:49,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:13:49,035 INFO L93 Difference]: Finished difference Result 178 states and 357 transitions. [2021-03-10 22:13:49,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 22:13:49,036 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:13:49,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:13:49,036 INFO L225 Difference]: With dead ends: 178 [2021-03-10 22:13:49,036 INFO L226 Difference]: Without dead ends: 178 [2021-03-10 22:13:49,036 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 944.3ms TimeCoverageRelationStatistics Valid=133, Invalid=737, Unknown=0, NotChecked=0, Total=870 [2021-03-10 22:13:49,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-03-10 22:13:49,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 127. [2021-03-10 22:13:49,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 2.134920634920635) internal successors, (269), 126 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:49,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 269 transitions. [2021-03-10 22:13:49,037 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 269 transitions. Word has length 19 [2021-03-10 22:13:49,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:13:49,037 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 269 transitions. [2021-03-10 22:13:49,037 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:49,037 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 269 transitions. [2021-03-10 22:13:49,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:13:49,038 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:13:49,038 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:13:49,238 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24381,482 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:13:49,238 INFO L428 AbstractCegarLoop]: === Iteration 488 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:13:49,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:13:49,238 INFO L82 PathProgramCache]: Analyzing trace with hash -639992764, now seen corresponding path program 482 times [2021-03-10 22:13:49,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:13:49,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116630936] [2021-03-10 22:13:49,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:13:49,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:13:49,364 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:49,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116630936] [2021-03-10 22:13:49,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452719948] [2021-03-10 22:13:49,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 483 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 483 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:13:49,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:13:49,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:13:49,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:13:49,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:13:50,033 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:50,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:13:50,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 22:13:50,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043384447] [2021-03-10 22:13:50,033 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:13:50,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:13:50,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:13:50,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:13:50,034 INFO L87 Difference]: Start difference. First operand 127 states and 269 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:50,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:13:50,884 INFO L93 Difference]: Finished difference Result 206 states and 408 transitions. [2021-03-10 22:13:50,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 22:13:50,885 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:13:50,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:13:50,886 INFO L225 Difference]: With dead ends: 206 [2021-03-10 22:13:50,886 INFO L226 Difference]: Without dead ends: 206 [2021-03-10 22:13:50,886 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 814.4ms TimeCoverageRelationStatistics Valid=148, Invalid=664, Unknown=0, NotChecked=0, Total=812 [2021-03-10 22:13:50,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-03-10 22:13:50,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 130. [2021-03-10 22:13:50,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 2.1705426356589146) internal successors, (280), 129 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:50,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 280 transitions. [2021-03-10 22:13:50,887 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 280 transitions. Word has length 19 [2021-03-10 22:13:50,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:13:50,887 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 280 transitions. [2021-03-10 22:13:50,887 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:50,887 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 280 transitions. [2021-03-10 22:13:50,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:13:50,887 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:13:50,887 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:13:51,094 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24403,483 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:13:51,095 INFO L428 AbstractCegarLoop]: === Iteration 489 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:13:51,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:13:51,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1175222566, now seen corresponding path program 483 times [2021-03-10 22:13:51,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:13:51,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095969032] [2021-03-10 22:13:51,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:13:51,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:13:51,216 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:51,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095969032] [2021-03-10 22:13:51,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684267046] [2021-03-10 22:13:51,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 484 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 484 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:13:51,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 22:13:51,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:13:51,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:13:51,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:13:51,586 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:51,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:13:51,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 22:13:51,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964344492] [2021-03-10 22:13:51,587 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:13:51,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:13:51,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:13:51,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:13:51,587 INFO L87 Difference]: Start difference. First operand 130 states and 280 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:52,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:13:52,173 INFO L93 Difference]: Finished difference Result 172 states and 358 transitions. [2021-03-10 22:13:52,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:13:52,174 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:13:52,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:13:52,174 INFO L225 Difference]: With dead ends: 172 [2021-03-10 22:13:52,174 INFO L226 Difference]: Without dead ends: 172 [2021-03-10 22:13:52,175 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 536.7ms TimeCoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:13:52,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-03-10 22:13:52,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 130. [2021-03-10 22:13:52,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 2.1705426356589146) internal successors, (280), 129 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:52,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 280 transitions. [2021-03-10 22:13:52,176 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 280 transitions. Word has length 19 [2021-03-10 22:13:52,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:13:52,176 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 280 transitions. [2021-03-10 22:13:52,176 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:52,176 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 280 transitions. [2021-03-10 22:13:52,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:13:52,176 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:13:52,176 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:13:52,376 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24480,484 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:13:52,376 INFO L428 AbstractCegarLoop]: === Iteration 490 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:13:52,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:13:52,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1539943101, now seen corresponding path program 484 times [2021-03-10 22:13:52,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:13:52,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512526682] [2021-03-10 22:13:52,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:13:52,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:13:52,494 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:52,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512526682] [2021-03-10 22:13:52,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687067451] [2021-03-10 22:13:52,495 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 485 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 485 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:13:52,605 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:13:52,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:13:52,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:13:52,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:13:53,054 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:53,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:13:53,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 22:13:53,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055808979] [2021-03-10 22:13:53,054 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:13:53,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:13:53,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:13:53,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:13:53,055 INFO L87 Difference]: Start difference. First operand 130 states and 280 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:53,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:13:53,778 INFO L93 Difference]: Finished difference Result 168 states and 340 transitions. [2021-03-10 22:13:53,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 22:13:53,779 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:13:53,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:13:53,779 INFO L225 Difference]: With dead ends: 168 [2021-03-10 22:13:53,779 INFO L226 Difference]: Without dead ends: 162 [2021-03-10 22:13:53,779 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 812.5ms TimeCoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:13:53,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-03-10 22:13:53,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 129. [2021-03-10 22:13:53,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.15625) internal successors, (276), 128 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:53,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 276 transitions. [2021-03-10 22:13:53,781 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 276 transitions. Word has length 19 [2021-03-10 22:13:53,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:13:53,781 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 276 transitions. [2021-03-10 22:13:53,781 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:53,781 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 276 transitions. [2021-03-10 22:13:53,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:13:53,781 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:13:53,781 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:13:53,981 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 485 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24500 [2021-03-10 22:13:53,981 INFO L428 AbstractCegarLoop]: === Iteration 491 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:13:53,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:13:53,981 INFO L82 PathProgramCache]: Analyzing trace with hash -587477244, now seen corresponding path program 485 times [2021-03-10 22:13:53,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:13:53,982 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395868805] [2021-03-10 22:13:53,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:13:53,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:13:54,099 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:54,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395868805] [2021-03-10 22:13:54,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321937602] [2021-03-10 22:13:54,099 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 486 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 486 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:13:54,210 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:13:54,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:13:54,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:13:54,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:13:54,450 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:54,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:13:54,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 22:13:54,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167124922] [2021-03-10 22:13:54,450 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:13:54,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:13:54,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:13:54,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:13:54,451 INFO L87 Difference]: Start difference. First operand 129 states and 276 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:54,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:13:54,889 INFO L93 Difference]: Finished difference Result 159 states and 332 transitions. [2021-03-10 22:13:54,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:13:54,890 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:13:54,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:13:54,890 INFO L225 Difference]: With dead ends: 159 [2021-03-10 22:13:54,890 INFO L226 Difference]: Without dead ends: 159 [2021-03-10 22:13:54,891 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 454.1ms TimeCoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:13:54,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-03-10 22:13:54,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 128. [2021-03-10 22:13:54,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.15748031496063) internal successors, (274), 127 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:54,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 274 transitions. [2021-03-10 22:13:54,892 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 274 transitions. Word has length 19 [2021-03-10 22:13:54,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:13:54,892 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 274 transitions. [2021-03-10 22:13:54,892 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:54,892 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 274 transitions. [2021-03-10 22:13:54,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:13:54,892 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:13:54,892 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:13:55,092 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 486 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24523 [2021-03-10 22:13:55,092 INFO L428 AbstractCegarLoop]: === Iteration 492 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:13:55,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:13:55,093 INFO L82 PathProgramCache]: Analyzing trace with hash 452758554, now seen corresponding path program 486 times [2021-03-10 22:13:55,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:13:55,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508469857] [2021-03-10 22:13:55,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:13:55,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:13:55,205 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:55,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508469857] [2021-03-10 22:13:55,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426528681] [2021-03-10 22:13:55,205 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 487 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 487 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:13:55,316 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 22:13:55,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:13:55,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:13:55,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:13:55,483 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:55,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:13:55,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-10 22:13:55,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852891473] [2021-03-10 22:13:55,484 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:13:55,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:13:55,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:13:55,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:13:55,484 INFO L87 Difference]: Start difference. First operand 128 states and 274 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:55,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:13:55,822 INFO L93 Difference]: Finished difference Result 150 states and 312 transitions. [2021-03-10 22:13:55,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:13:55,823 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:13:55,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:13:55,824 INFO L225 Difference]: With dead ends: 150 [2021-03-10 22:13:55,824 INFO L226 Difference]: Without dead ends: 150 [2021-03-10 22:13:55,824 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 319.8ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:13:55,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-03-10 22:13:55,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 124. [2021-03-10 22:13:55,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.1219512195121952) internal successors, (261), 123 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:55,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 261 transitions. [2021-03-10 22:13:55,825 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 261 transitions. Word has length 19 [2021-03-10 22:13:55,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:13:55,825 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 261 transitions. [2021-03-10 22:13:55,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:55,825 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 261 transitions. [2021-03-10 22:13:55,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:13:55,825 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:13:55,825 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:13:56,025 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24539,487 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:13:56,025 INFO L428 AbstractCegarLoop]: === Iteration 493 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:13:56,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:13:56,026 INFO L82 PathProgramCache]: Analyzing trace with hash 413634243, now seen corresponding path program 487 times [2021-03-10 22:13:56,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:13:56,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705770856] [2021-03-10 22:13:56,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:13:56,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:13:56,142 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:56,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705770856] [2021-03-10 22:13:56,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106525846] [2021-03-10 22:13:56,143 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 488 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 488 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:13:56,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:13:56,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:13:56,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:13:56,508 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:56,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:13:56,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-10 22:13:56,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519114082] [2021-03-10 22:13:56,508 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:13:56,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:13:56,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:13:56,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:13:56,509 INFO L87 Difference]: Start difference. First operand 124 states and 261 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:56,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:13:56,852 INFO L93 Difference]: Finished difference Result 132 states and 271 transitions. [2021-03-10 22:13:56,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:13:56,852 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:13:56,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:13:56,853 INFO L225 Difference]: With dead ends: 132 [2021-03-10 22:13:56,853 INFO L226 Difference]: Without dead ends: 124 [2021-03-10 22:13:56,853 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 425.9ms TimeCoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:13:56,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-03-10 22:13:56,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 122. [2021-03-10 22:13:56,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.115702479338843) internal successors, (256), 121 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:56,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 256 transitions. [2021-03-10 22:13:56,854 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 256 transitions. Word has length 19 [2021-03-10 22:13:56,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:13:56,854 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 256 transitions. [2021-03-10 22:13:56,854 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:56,854 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 256 transitions. [2021-03-10 22:13:56,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:13:56,854 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:13:56,854 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:13:57,054 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 488 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24543 [2021-03-10 22:13:57,054 INFO L428 AbstractCegarLoop]: === Iteration 494 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:13:57,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:13:57,055 INFO L82 PathProgramCache]: Analyzing trace with hash -1781789199, now seen corresponding path program 488 times [2021-03-10 22:13:57,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:13:57,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799546214] [2021-03-10 22:13:57,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:13:57,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:13:57,170 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:57,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799546214] [2021-03-10 22:13:57,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428526067] [2021-03-10 22:13:57,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 489 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 489 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:13:57,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:13:57,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:13:57,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:13:57,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:13:57,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:57,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:57,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:13:57,481 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:57,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:57,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:13:57,485 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:57,512 INFO L628 ElimStorePlain]: treesize reduction 25, result has 41.9 percent of original size [2021-03-10 22:13:57,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:13:57,515 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:57,522 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:13:57,523 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 22:13:57,523 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:71, output treesize:6 [2021-03-10 22:13:57,532 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:57,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:13:57,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-03-10 22:13:57,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870053161] [2021-03-10 22:13:57,532 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:13:57,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:13:57,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:13:57,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:13:57,532 INFO L87 Difference]: Start difference. First operand 122 states and 256 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:57,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:13:57,979 INFO L93 Difference]: Finished difference Result 166 states and 344 transitions. [2021-03-10 22:13:57,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 22:13:57,980 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:13:57,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:13:57,980 INFO L225 Difference]: With dead ends: 166 [2021-03-10 22:13:57,980 INFO L226 Difference]: Without dead ends: 166 [2021-03-10 22:13:57,980 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 371.4ms TimeCoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:13:57,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-03-10 22:13:57,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 122. [2021-03-10 22:13:57,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.115702479338843) internal successors, (256), 121 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:57,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 256 transitions. [2021-03-10 22:13:57,982 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 256 transitions. Word has length 19 [2021-03-10 22:13:57,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:13:57,982 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 256 transitions. [2021-03-10 22:13:57,982 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:57,982 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 256 transitions. [2021-03-10 22:13:57,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:13:57,982 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:13:57,982 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:13:58,191 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 489 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24554 [2021-03-10 22:13:58,191 INFO L428 AbstractCegarLoop]: === Iteration 495 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:13:58,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:13:58,191 INFO L82 PathProgramCache]: Analyzing trace with hash 1498663619, now seen corresponding path program 489 times [2021-03-10 22:13:58,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:13:58,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626247611] [2021-03-10 22:13:58,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:13:58,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:13:58,308 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:58,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626247611] [2021-03-10 22:13:58,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131450777] [2021-03-10 22:13:58,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 490 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 490 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:13:58,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 22:13:58,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:13:58,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:13:58,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:13:58,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:13:58,683 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:58,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:13:58,687 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:58,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:58,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:58,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:13:58,693 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:58,696 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:13:58,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:13:58,697 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:58,754 INFO L628 ElimStorePlain]: treesize reduction 60, result has 35.5 percent of original size [2021-03-10 22:13:58,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:13:58,757 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:13:58,795 INFO L628 ElimStorePlain]: treesize reduction 1, result has 96.6 percent of original size [2021-03-10 22:13:58,796 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:13:58,796 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 3 variables, input treesize:128, output treesize:12 [2021-03-10 22:13:58,833 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:58,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:13:58,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-03-10 22:13:58,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663130269] [2021-03-10 22:13:58,833 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:13:58,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:13:58,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:13:58,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:13:58,834 INFO L87 Difference]: Start difference. First operand 122 states and 256 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:59,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:13:59,299 INFO L93 Difference]: Finished difference Result 182 states and 376 transitions. [2021-03-10 22:13:59,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 22:13:59,300 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:13:59,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:13:59,300 INFO L225 Difference]: With dead ends: 182 [2021-03-10 22:13:59,300 INFO L226 Difference]: Without dead ends: 182 [2021-03-10 22:13:59,300 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 384.6ms TimeCoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:13:59,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-03-10 22:13:59,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 123. [2021-03-10 22:13:59,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 2.1147540983606556) internal successors, (258), 122 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:59,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 258 transitions. [2021-03-10 22:13:59,301 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 258 transitions. Word has length 19 [2021-03-10 22:13:59,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:13:59,301 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 258 transitions. [2021-03-10 22:13:59,301 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:13:59,302 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 258 transitions. [2021-03-10 22:13:59,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:13:59,302 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:13:59,302 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:13:59,502 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 490 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24580 [2021-03-10 22:13:59,502 INFO L428 AbstractCegarLoop]: === Iteration 496 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:13:59,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:13:59,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1051325896, now seen corresponding path program 490 times [2021-03-10 22:13:59,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:13:59,502 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2448313] [2021-03-10 22:13:59,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:13:59,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:13:59,623 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:13:59,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2448313] [2021-03-10 22:13:59,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977174380] [2021-03-10 22:13:59,623 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 491 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 491 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:13:59,733 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:13:59,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:13:59,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:13:59,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:14:00,058 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:14:00,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:14:00,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-10 22:14:00,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883340732] [2021-03-10 22:14:00,059 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:14:00,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:14:00,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:14:00,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:14:00,059 INFO L87 Difference]: Start difference. First operand 123 states and 258 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:00,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:14:00,416 INFO L93 Difference]: Finished difference Result 149 states and 310 transitions. [2021-03-10 22:14:00,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 22:14:00,417 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:14:00,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:14:00,417 INFO L225 Difference]: With dead ends: 149 [2021-03-10 22:14:00,417 INFO L226 Difference]: Without dead ends: 149 [2021-03-10 22:14:00,417 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 417.1ms TimeCoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2021-03-10 22:14:00,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-03-10 22:14:00,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 121. [2021-03-10 22:14:00,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.1166666666666667) internal successors, (254), 120 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:00,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 254 transitions. [2021-03-10 22:14:00,419 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 254 transitions. Word has length 19 [2021-03-10 22:14:00,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:14:00,419 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 254 transitions. [2021-03-10 22:14:00,419 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:00,419 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 254 transitions. [2021-03-10 22:14:00,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:14:00,419 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:14:00,419 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:14:00,627 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24629,491 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:14:00,627 INFO L428 AbstractCegarLoop]: === Iteration 497 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:14:00,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:14:00,627 INFO L82 PathProgramCache]: Analyzing trace with hash -509837967, now seen corresponding path program 491 times [2021-03-10 22:14:00,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:14:00,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354636970] [2021-03-10 22:14:00,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:14:00,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:14:00,743 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:14:00,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354636970] [2021-03-10 22:14:00,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778489542] [2021-03-10 22:14:00,744 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 492 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 492 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:14:00,855 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 22:14:00,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:14:00,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:14:00,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:14:01,083 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:14:01,084 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:01,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:14:01,090 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:01,226 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 48 [2021-03-10 22:14:01,226 INFO L628 ElimStorePlain]: treesize reduction 86, result has 48.5 percent of original size [2021-03-10 22:14:01,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:14:01,232 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:01,283 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:14:01,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:14:01,289 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:01,349 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:14:01,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:14:01,357 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:01,404 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:14:01,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:14:01,409 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:01,453 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:14:01,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:14:01,460 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:01,504 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:14:01,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:14:01,509 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:01,550 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:14:01,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:14:01,555 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:01,594 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:14:01,595 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:14:01,596 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:199, output treesize:13 [2021-03-10 22:14:01,642 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:14:01,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:14:01,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-03-10 22:14:01,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476274784] [2021-03-10 22:14:01,643 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:14:01,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:14:01,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:14:01,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:14:01,643 INFO L87 Difference]: Start difference. First operand 121 states and 254 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:02,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:14:02,099 INFO L93 Difference]: Finished difference Result 164 states and 333 transitions. [2021-03-10 22:14:02,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 22:14:02,099 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:14:02,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:14:02,100 INFO L225 Difference]: With dead ends: 164 [2021-03-10 22:14:02,100 INFO L226 Difference]: Without dead ends: 164 [2021-03-10 22:14:02,100 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 441.2ms TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:14:02,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-03-10 22:14:02,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 121. [2021-03-10 22:14:02,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.1166666666666667) internal successors, (254), 120 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:02,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 254 transitions. [2021-03-10 22:14:02,101 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 254 transitions. Word has length 19 [2021-03-10 22:14:02,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:14:02,101 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 254 transitions. [2021-03-10 22:14:02,101 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:02,101 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 254 transitions. [2021-03-10 22:14:02,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:14:02,101 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:14:02,101 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:14:02,302 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 492 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24666 [2021-03-10 22:14:02,302 INFO L428 AbstractCegarLoop]: === Iteration 498 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:14:02,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:14:02,302 INFO L82 PathProgramCache]: Analyzing trace with hash 1639071218, now seen corresponding path program 492 times [2021-03-10 22:14:02,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:14:02,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073996603] [2021-03-10 22:14:02,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:14:02,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:14:02,422 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:14:02,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073996603] [2021-03-10 22:14:02,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330982453] [2021-03-10 22:14:02,423 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 493 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 493 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:14:02,535 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 22:14:02,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:14:02,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:14:02,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:14:02,894 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:14:02,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:14:02,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-10 22:14:02,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569258409] [2021-03-10 22:14:02,895 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:14:02,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:14:02,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:14:02,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:14:02,895 INFO L87 Difference]: Start difference. First operand 121 states and 254 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:03,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:14:03,735 INFO L93 Difference]: Finished difference Result 216 states and 429 transitions. [2021-03-10 22:14:03,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-10 22:14:03,735 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:14:03,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:14:03,735 INFO L225 Difference]: With dead ends: 216 [2021-03-10 22:14:03,735 INFO L226 Difference]: Without dead ends: 216 [2021-03-10 22:14:03,735 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 689.2ms TimeCoverageRelationStatistics Valid=196, Invalid=994, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 22:14:03,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-03-10 22:14:03,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 122. [2021-03-10 22:14:03,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.1404958677685952) internal successors, (259), 121 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:03,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 259 transitions. [2021-03-10 22:14:03,737 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 259 transitions. Word has length 19 [2021-03-10 22:14:03,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:14:03,737 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 259 transitions. [2021-03-10 22:14:03,737 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:03,737 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 259 transitions. [2021-03-10 22:14:03,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:14:03,737 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:14:03,737 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:14:03,937 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 493 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24687 [2021-03-10 22:14:03,937 INFO L428 AbstractCegarLoop]: === Iteration 499 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:14:03,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:14:03,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1103841416, now seen corresponding path program 493 times [2021-03-10 22:14:03,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:14:03,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624552734] [2021-03-10 22:14:03,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:14:03,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:14:04,056 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:14:04,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624552734] [2021-03-10 22:14:04,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510995836] [2021-03-10 22:14:04,056 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 494 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 494 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:14:04,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:14:04,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:14:04,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:14:04,360 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:14:04,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:14:04,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-10 22:14:04,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205508794] [2021-03-10 22:14:04,360 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:14:04,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:14:04,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:14:04,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:14:04,360 INFO L87 Difference]: Start difference. First operand 122 states and 259 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:04,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:14:04,947 INFO L93 Difference]: Finished difference Result 157 states and 325 transitions. [2021-03-10 22:14:04,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 22:14:04,948 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:14:04,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:14:04,948 INFO L225 Difference]: With dead ends: 157 [2021-03-10 22:14:04,948 INFO L226 Difference]: Without dead ends: 157 [2021-03-10 22:14:04,949 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 441.9ms TimeCoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2021-03-10 22:14:04,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-03-10 22:14:04,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 120. [2021-03-10 22:14:04,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.1176470588235294) internal successors, (252), 119 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:04,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 252 transitions. [2021-03-10 22:14:04,950 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 252 transitions. Word has length 19 [2021-03-10 22:14:04,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:14:04,950 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 252 transitions. [2021-03-10 22:14:04,950 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:04,950 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 252 transitions. [2021-03-10 22:14:04,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:14:04,950 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:14:04,950 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:14:05,150 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 494 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24740 [2021-03-10 22:14:05,150 INFO L428 AbstractCegarLoop]: === Iteration 500 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:14:05,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:14:05,151 INFO L82 PathProgramCache]: Analyzing trace with hash 739120881, now seen corresponding path program 494 times [2021-03-10 22:14:05,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:14:05,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025774503] [2021-03-10 22:14:05,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:14:05,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:14:05,259 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:14:05,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025774503] [2021-03-10 22:14:05,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369871755] [2021-03-10 22:14:05,260 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 495 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 495 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:14:05,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:14:05,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:14:05,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:14:05,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:14:05,620 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:14:05,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:14:05,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-03-10 22:14:05,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843215272] [2021-03-10 22:14:05,620 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:14:05,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:14:05,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:14:05,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:14:05,620 INFO L87 Difference]: Start difference. First operand 120 states and 252 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:06,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:14:06,059 INFO L93 Difference]: Finished difference Result 134 states and 276 transitions. [2021-03-10 22:14:06,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:14:06,060 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:14:06,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:14:06,060 INFO L225 Difference]: With dead ends: 134 [2021-03-10 22:14:06,060 INFO L226 Difference]: Without dead ends: 130 [2021-03-10 22:14:06,061 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 446.1ms TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:14:06,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-03-10 22:14:06,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 118. [2021-03-10 22:14:06,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.111111111111111) internal successors, (247), 117 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:06,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 247 transitions. [2021-03-10 22:14:06,062 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 247 transitions. Word has length 19 [2021-03-10 22:14:06,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:14:06,062 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 247 transitions. [2021-03-10 22:14:06,062 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:06,062 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 247 transitions. [2021-03-10 22:14:06,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:14:06,062 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:14:06,062 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:14:06,262 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 495 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24756 [2021-03-10 22:14:06,262 INFO L428 AbstractCegarLoop]: === Iteration 501 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:14:06,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:14:06,263 INFO L82 PathProgramCache]: Analyzing trace with hash 530397831, now seen corresponding path program 495 times [2021-03-10 22:14:06,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:14:06,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090149660] [2021-03-10 22:14:06,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:14:06,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:14:06,377 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:14:06,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090149660] [2021-03-10 22:14:06,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7988954] [2021-03-10 22:14:06,377 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 496 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 496 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:14:06,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:14:06,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:14:06,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:14:06,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:14:06,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:14:06,767 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:06,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:06,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:14:06,772 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:06,860 INFO L628 ElimStorePlain]: treesize reduction 51, result has 51.4 percent of original size [2021-03-10 22:14:06,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:14:06,864 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:06,897 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:14:06,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:14:06,901 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:06,932 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:14:06,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:14:06,936 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:06,965 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:14:06,966 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:14:06,966 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 7 variables, input treesize:128, output treesize:13 [2021-03-10 22:14:07,014 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:14:07,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:14:07,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-10 22:14:07,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195777244] [2021-03-10 22:14:07,015 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:14:07,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:14:07,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:14:07,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:14:07,015 INFO L87 Difference]: Start difference. First operand 118 states and 247 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:07,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:14:07,565 INFO L93 Difference]: Finished difference Result 154 states and 306 transitions. [2021-03-10 22:14:07,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 22:14:07,566 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:14:07,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:14:07,566 INFO L225 Difference]: With dead ends: 154 [2021-03-10 22:14:07,567 INFO L226 Difference]: Without dead ends: 154 [2021-03-10 22:14:07,567 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 545.2ms TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:14:07,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-03-10 22:14:07,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 115. [2021-03-10 22:14:07,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.06140350877193) internal successors, (235), 114 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:07,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 235 transitions. [2021-03-10 22:14:07,568 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 235 transitions. Word has length 19 [2021-03-10 22:14:07,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:14:07,568 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 235 transitions. [2021-03-10 22:14:07,568 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:07,568 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 235 transitions. [2021-03-10 22:14:07,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:14:07,568 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:14:07,568 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:14:07,775 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 496 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24775 [2021-03-10 22:14:07,775 INFO L428 AbstractCegarLoop]: === Iteration 502 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:14:07,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:14:07,775 INFO L82 PathProgramCache]: Analyzing trace with hash -1615660280, now seen corresponding path program 496 times [2021-03-10 22:14:07,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:14:07,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393033231] [2021-03-10 22:14:07,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:14:07,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:14:07,890 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:14:07,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393033231] [2021-03-10 22:14:07,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052305789] [2021-03-10 22:14:07,890 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 497 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 497 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:14:08,002 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:14:08,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:14:08,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:14:08,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:14:08,315 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:14:08,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:14:08,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-10 22:14:08,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034650666] [2021-03-10 22:14:08,315 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:14:08,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:14:08,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:14:08,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:14:08,315 INFO L87 Difference]: Start difference. First operand 115 states and 235 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:09,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:14:09,148 INFO L93 Difference]: Finished difference Result 207 states and 402 transitions. [2021-03-10 22:14:09,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 22:14:09,149 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:14:09,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:14:09,149 INFO L225 Difference]: With dead ends: 207 [2021-03-10 22:14:09,149 INFO L226 Difference]: Without dead ends: 207 [2021-03-10 22:14:09,149 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 733.3ms TimeCoverageRelationStatistics Valid=166, Invalid=826, Unknown=0, NotChecked=0, Total=992 [2021-03-10 22:14:09,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-03-10 22:14:09,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 117. [2021-03-10 22:14:09,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.0948275862068964) internal successors, (243), 116 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:09,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 243 transitions. [2021-03-10 22:14:09,150 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 243 transitions. Word has length 19 [2021-03-10 22:14:09,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:14:09,150 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 243 transitions. [2021-03-10 22:14:09,150 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:09,151 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 243 transitions. [2021-03-10 22:14:09,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:14:09,151 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:14:09,151 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:14:09,351 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24794,497 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:14:09,351 INFO L428 AbstractCegarLoop]: === Iteration 503 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:14:09,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:14:09,351 INFO L82 PathProgramCache]: Analyzing trace with hash 2144077214, now seen corresponding path program 497 times [2021-03-10 22:14:09,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:14:09,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323128771] [2021-03-10 22:14:09,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:14:09,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:14:09,469 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:14:09,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323128771] [2021-03-10 22:14:09,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772283832] [2021-03-10 22:14:09,469 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 498 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 498 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:14:09,582 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 22:14:09,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:14:09,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:14:09,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:14:09,833 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:14:09,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:14:09,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-10 22:14:09,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349119463] [2021-03-10 22:14:09,834 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:14:09,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:14:09,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:14:09,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:14:09,834 INFO L87 Difference]: Start difference. First operand 117 states and 243 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:10,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:14:10,459 INFO L93 Difference]: Finished difference Result 164 states and 333 transitions. [2021-03-10 22:14:10,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 22:14:10,460 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:14:10,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:14:10,460 INFO L225 Difference]: With dead ends: 164 [2021-03-10 22:14:10,460 INFO L226 Difference]: Without dead ends: 164 [2021-03-10 22:14:10,460 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 475.2ms TimeCoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2021-03-10 22:14:10,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-03-10 22:14:10,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 117. [2021-03-10 22:14:10,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.0948275862068964) internal successors, (243), 116 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:10,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 243 transitions. [2021-03-10 22:14:10,461 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 243 transitions. Word has length 19 [2021-03-10 22:14:10,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:14:10,462 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 243 transitions. [2021-03-10 22:14:10,462 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:10,462 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 243 transitions. [2021-03-10 22:14:10,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:14:10,462 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:14:10,462 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:14:10,662 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 498 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24831 [2021-03-10 22:14:10,662 INFO L428 AbstractCegarLoop]: === Iteration 504 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:14:10,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:14:10,662 INFO L82 PathProgramCache]: Analyzing trace with hash 1779356679, now seen corresponding path program 498 times [2021-03-10 22:14:10,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:14:10,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625765258] [2021-03-10 22:14:10,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:14:10,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:14:10,765 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:14:10,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625765258] [2021-03-10 22:14:10,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670496997] [2021-03-10 22:14:10,766 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 499 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 499 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:14:10,878 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:14:10,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:14:10,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:14:10,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:14:11,167 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:14:11,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:14:11,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-03-10 22:14:11,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953282213] [2021-03-10 22:14:11,168 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:14:11,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:14:11,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:14:11,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:14:11,168 INFO L87 Difference]: Start difference. First operand 117 states and 243 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:11,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:14:11,566 INFO L93 Difference]: Finished difference Result 141 states and 285 transitions. [2021-03-10 22:14:11,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:14:11,567 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:14:11,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:14:11,568 INFO L225 Difference]: With dead ends: 141 [2021-03-10 22:14:11,568 INFO L226 Difference]: Without dead ends: 137 [2021-03-10 22:14:11,568 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 439.8ms TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:14:11,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-03-10 22:14:11,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 116. [2021-03-10 22:14:11,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.0869565217391304) internal successors, (240), 115 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:11,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 240 transitions. [2021-03-10 22:14:11,569 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 240 transitions. Word has length 19 [2021-03-10 22:14:11,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:14:11,569 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 240 transitions. [2021-03-10 22:14:11,569 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:11,569 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 240 transitions. [2021-03-10 22:14:11,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:14:11,569 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:14:11,569 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:14:11,769 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24860,499 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:14:11,769 INFO L428 AbstractCegarLoop]: === Iteration 505 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:14:11,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:14:11,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1563144760, now seen corresponding path program 499 times [2021-03-10 22:14:11,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:14:11,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843127581] [2021-03-10 22:14:11,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:14:11,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:14:11,876 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:14:11,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843127581] [2021-03-10 22:14:11,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464392234] [2021-03-10 22:14:11,876 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 500 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 500 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:14:11,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:14:11,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:14:11,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:14:12,171 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:14:12,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:14:12,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-03-10 22:14:12,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390351959] [2021-03-10 22:14:12,172 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:14:12,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:14:12,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:14:12,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:14:12,172 INFO L87 Difference]: Start difference. First operand 116 states and 240 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:12,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:14:12,595 INFO L93 Difference]: Finished difference Result 151 states and 305 transitions. [2021-03-10 22:14:12,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:14:12,596 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:14:12,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:14:12,596 INFO L225 Difference]: With dead ends: 151 [2021-03-10 22:14:12,596 INFO L226 Difference]: Without dead ends: 151 [2021-03-10 22:14:12,596 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 304.7ms TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:14:12,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-03-10 22:14:12,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 113. [2021-03-10 22:14:12,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0535714285714284) internal successors, (230), 112 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:12,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 230 transitions. [2021-03-10 22:14:12,598 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 230 transitions. Word has length 19 [2021-03-10 22:14:12,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:14:12,598 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 230 transitions. [2021-03-10 22:14:12,598 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:12,598 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 230 transitions. [2021-03-10 22:14:12,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:14:12,598 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:14:12,598 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:14:12,798 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 500 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24879 [2021-03-10 22:14:12,798 INFO L428 AbstractCegarLoop]: === Iteration 506 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:14:12,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:14:12,798 INFO L82 PathProgramCache]: Analyzing trace with hash 766664147, now seen corresponding path program 500 times [2021-03-10 22:14:12,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:14:12,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452659803] [2021-03-10 22:14:12,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:14:12,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:14:12,897 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:14:12,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452659803] [2021-03-10 22:14:12,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554051633] [2021-03-10 22:14:12,897 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 501 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 501 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:14:13,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:14:13,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:14:13,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:14:13,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:14:13,274 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:14:13,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:14:13,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-03-10 22:14:13,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392587353] [2021-03-10 22:14:13,275 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:14:13,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:14:13,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:14:13,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:14:13,275 INFO L87 Difference]: Start difference. First operand 113 states and 230 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:13,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:14:13,610 INFO L93 Difference]: Finished difference Result 127 states and 253 transitions. [2021-03-10 22:14:13,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:14:13,611 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:14:13,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:14:13,611 INFO L225 Difference]: With dead ends: 127 [2021-03-10 22:14:13,611 INFO L226 Difference]: Without dead ends: 121 [2021-03-10 22:14:13,611 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 351.2ms TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:14:13,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-03-10 22:14:13,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 111. [2021-03-10 22:14:13,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.0454545454545454) internal successors, (225), 110 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:13,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 225 transitions. [2021-03-10 22:14:13,612 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 225 transitions. Word has length 19 [2021-03-10 22:14:13,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:14:13,612 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 225 transitions. [2021-03-10 22:14:13,612 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:13,612 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 225 transitions. [2021-03-10 22:14:13,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:14:13,612 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:14:13,612 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:14:13,812 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 501 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24895 [2021-03-10 22:14:13,813 INFO L428 AbstractCegarLoop]: === Iteration 507 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:14:13,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:14:13,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1014216109, now seen corresponding path program 501 times [2021-03-10 22:14:13,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:14:13,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081555420] [2021-03-10 22:14:13,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:14:13,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:14:13,928 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:14:13,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081555420] [2021-03-10 22:14:13,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642335860] [2021-03-10 22:14:13,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 502 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 502 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:14:14,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 22:14:14,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:14:14,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:14:14,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:14:14,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:14,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:14,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:14:14,347 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:14,350 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:14:14,351 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:14,435 INFO L628 ElimStorePlain]: treesize reduction 44, result has 54.6 percent of original size [2021-03-10 22:14:14,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:14:14,440 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:14,472 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:14:14,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:14:14,477 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:14,507 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:14:14,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:14:14,512 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:14,541 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:14:14,542 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:14:14,542 INFO L247 ElimStorePlain]: Needed 6 recursive calls to eliminate 7 variables, input treesize:128, output treesize:13 [2021-03-10 22:14:14,593 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:14:14,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:14:14,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-03-10 22:14:14,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992176052] [2021-03-10 22:14:14,593 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:14:14,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:14:14,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:14:14,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:14:14,594 INFO L87 Difference]: Start difference. First operand 111 states and 225 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:14,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:14:14,900 INFO L93 Difference]: Finished difference Result 145 states and 285 transitions. [2021-03-10 22:14:14,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:14:14,900 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:14:14,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:14:14,900 INFO L225 Difference]: With dead ends: 145 [2021-03-10 22:14:14,901 INFO L226 Difference]: Without dead ends: 145 [2021-03-10 22:14:14,901 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 387.5ms TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:14:14,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-03-10 22:14:14,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 115. [2021-03-10 22:14:14,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.0701754385964914) internal successors, (236), 114 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:14,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 236 transitions. [2021-03-10 22:14:14,902 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 236 transitions. Word has length 19 [2021-03-10 22:14:14,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:14:14,902 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 236 transitions. [2021-03-10 22:14:14,902 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:14,902 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 236 transitions. [2021-03-10 22:14:14,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:14:14,902 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:14:14,902 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:14:15,102 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 502 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24913 [2021-03-10 22:14:15,102 INFO L428 AbstractCegarLoop]: === Iteration 508 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:14:15,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:14:15,103 INFO L82 PathProgramCache]: Analyzing trace with hash 566878386, now seen corresponding path program 502 times [2021-03-10 22:14:15,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:14:15,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150138201] [2021-03-10 22:14:15,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:14:15,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:14:15,221 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:14:15,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150138201] [2021-03-10 22:14:15,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407328436] [2021-03-10 22:14:15,222 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 503 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 503 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:14:15,334 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:14:15,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:14:15,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:14:15,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:14:15,489 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:14:15,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:14:15,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-03-10 22:14:15,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482345068] [2021-03-10 22:14:15,489 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:14:15,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:14:15,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:14:15,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:14:15,490 INFO L87 Difference]: Start difference. First operand 115 states and 236 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:15,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:14:15,986 INFO L93 Difference]: Finished difference Result 177 states and 341 transitions. [2021-03-10 22:14:15,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:14:15,987 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:14:15,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:14:15,987 INFO L225 Difference]: With dead ends: 177 [2021-03-10 22:14:15,987 INFO L226 Difference]: Without dead ends: 177 [2021-03-10 22:14:15,987 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 462.2ms TimeCoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:14:15,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-03-10 22:14:15,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 118. [2021-03-10 22:14:15,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.111111111111111) internal successors, (247), 117 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:15,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 247 transitions. [2021-03-10 22:14:15,989 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 247 transitions. Word has length 19 [2021-03-10 22:14:15,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:14:15,989 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 247 transitions. [2021-03-10 22:14:15,989 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:15,989 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 247 transitions. [2021-03-10 22:14:15,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:14:15,989 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:14:15,989 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:14:16,189 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 503 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24932 [2021-03-10 22:14:16,189 INFO L428 AbstractCegarLoop]: === Iteration 509 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:14:16,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:14:16,190 INFO L82 PathProgramCache]: Analyzing trace with hash 31648584, now seen corresponding path program 503 times [2021-03-10 22:14:16,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:14:16,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910031694] [2021-03-10 22:14:16,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:14:16,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:14:16,306 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:14:16,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910031694] [2021-03-10 22:14:16,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290543995] [2021-03-10 22:14:16,306 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 504 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 504 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:14:16,420 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 22:14:16,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:14:16,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:14:16,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:14:16,655 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:14:16,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:14:16,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-10 22:14:16,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442067118] [2021-03-10 22:14:16,656 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:14:16,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:14:16,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:14:16,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:14:16,656 INFO L87 Difference]: Start difference. First operand 118 states and 247 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:17,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:14:17,059 INFO L93 Difference]: Finished difference Result 142 states and 289 transitions. [2021-03-10 22:14:17,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:14:17,060 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:14:17,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:14:17,060 INFO L225 Difference]: With dead ends: 142 [2021-03-10 22:14:17,060 INFO L226 Difference]: Without dead ends: 142 [2021-03-10 22:14:17,060 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 314.8ms TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:14:17,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-03-10 22:14:17,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 118. [2021-03-10 22:14:17,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.111111111111111) internal successors, (247), 117 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:17,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 247 transitions. [2021-03-10 22:14:17,062 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 247 transitions. Word has length 19 [2021-03-10 22:14:17,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:14:17,062 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 247 transitions. [2021-03-10 22:14:17,062 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:17,062 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 247 transitions. [2021-03-10 22:14:17,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:14:17,062 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:14:17,062 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:14:17,262 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24942,504 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:14:17,262 INFO L428 AbstractCegarLoop]: === Iteration 510 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:14:17,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:14:17,262 INFO L82 PathProgramCache]: Analyzing trace with hash -333071951, now seen corresponding path program 504 times [2021-03-10 22:14:17,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:14:17,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324437582] [2021-03-10 22:14:17,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:14:17,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:14:17,375 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:14:17,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324437582] [2021-03-10 22:14:17,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050741455] [2021-03-10 22:14:17,375 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 505 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 505 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:14:17,491 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:14:17,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:14:17,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:14:17,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:14:17,910 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:14:17,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:14:17,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-03-10 22:14:17,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500463394] [2021-03-10 22:14:17,911 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:14:17,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:14:17,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:14:17,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:14:17,911 INFO L87 Difference]: Start difference. First operand 118 states and 247 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:18,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:14:18,265 INFO L93 Difference]: Finished difference Result 140 states and 284 transitions. [2021-03-10 22:14:18,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:14:18,266 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:14:18,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:14:18,266 INFO L225 Difference]: With dead ends: 140 [2021-03-10 22:14:18,266 INFO L226 Difference]: Without dead ends: 136 [2021-03-10 22:14:18,266 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 456.4ms TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:14:18,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-03-10 22:14:18,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 117. [2021-03-10 22:14:18,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.103448275862069) internal successors, (244), 116 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:18,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 244 transitions. [2021-03-10 22:14:18,268 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 244 transitions. Word has length 19 [2021-03-10 22:14:18,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:14:18,268 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 244 transitions. [2021-03-10 22:14:18,268 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:18,268 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 244 transitions. [2021-03-10 22:14:18,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:14:18,268 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:14:18,268 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:14:18,468 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 505 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24959 [2021-03-10 22:14:18,468 INFO L428 AbstractCegarLoop]: === Iteration 511 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:14:18,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:14:18,468 INFO L82 PathProgramCache]: Analyzing trace with hash 619393906, now seen corresponding path program 505 times [2021-03-10 22:14:18,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:14:18,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932959377] [2021-03-10 22:14:18,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:14:18,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:14:18,581 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:14:18,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932959377] [2021-03-10 22:14:18,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51694888] [2021-03-10 22:14:18,582 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 506 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 506 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:14:18,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:14:18,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:14:18,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:14:18,836 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:14:18,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:14:18,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-03-10 22:14:18,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024885587] [2021-03-10 22:14:18,836 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:14:18,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:14:18,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:14:18,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:14:18,836 INFO L87 Difference]: Start difference. First operand 117 states and 244 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:19,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:14:19,124 INFO L93 Difference]: Finished difference Result 143 states and 292 transitions. [2021-03-10 22:14:19,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:14:19,125 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:14:19,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:14:19,125 INFO L225 Difference]: With dead ends: 143 [2021-03-10 22:14:19,125 INFO L226 Difference]: Without dead ends: 143 [2021-03-10 22:14:19,125 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 255.8ms TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:14:19,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-03-10 22:14:19,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 117. [2021-03-10 22:14:19,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.103448275862069) internal successors, (244), 116 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:19,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 244 transitions. [2021-03-10 22:14:19,126 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 244 transitions. Word has length 19 [2021-03-10 22:14:19,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:14:19,126 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 244 transitions. [2021-03-10 22:14:19,126 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:19,126 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 244 transitions. [2021-03-10 22:14:19,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:14:19,126 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:14:19,126 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:14:19,327 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24987,506 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:14:19,327 INFO L428 AbstractCegarLoop]: === Iteration 512 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:14:19,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:14:19,327 INFO L82 PathProgramCache]: Analyzing trace with hash -1345764483, now seen corresponding path program 506 times [2021-03-10 22:14:19,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:14:19,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77781608] [2021-03-10 22:14:19,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:14:19,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:14:19,438 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:14:19,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77781608] [2021-03-10 22:14:19,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134927996] [2021-03-10 22:14:19,438 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 507 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 507 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:14:19,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:14:19,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:14:19,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:14:19,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:14:19,940 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:14:19,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:14:19,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-03-10 22:14:19,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759475841] [2021-03-10 22:14:19,940 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:14:19,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:14:19,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:14:19,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:14:19,941 INFO L87 Difference]: Start difference. First operand 117 states and 244 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:20,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:14:20,278 INFO L93 Difference]: Finished difference Result 132 states and 267 transitions. [2021-03-10 22:14:20,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 22:14:20,279 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:14:20,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:14:20,279 INFO L225 Difference]: With dead ends: 132 [2021-03-10 22:14:20,279 INFO L226 Difference]: Without dead ends: 126 [2021-03-10 22:14:20,279 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 405.3ms TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:14:20,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-03-10 22:14:20,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 116. [2021-03-10 22:14:20,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.0956521739130434) internal successors, (241), 115 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:20,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 241 transitions. [2021-03-10 22:14:20,282 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 241 transitions. Word has length 19 [2021-03-10 22:14:20,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:14:20,282 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 241 transitions. [2021-03-10 22:14:20,282 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:20,282 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 241 transitions. [2021-03-10 22:14:20,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:14:20,282 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:14:20,282 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:14:20,495 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24991,507 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:14:20,495 INFO L428 AbstractCegarLoop]: === Iteration 513 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:14:20,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:14:20,495 INFO L82 PathProgramCache]: Analyzing trace with hash 1659629704, now seen corresponding path program 507 times [2021-03-10 22:14:20,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:14:20,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943914670] [2021-03-10 22:14:20,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:14:20,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:14:20,606 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:14:20,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943914670] [2021-03-10 22:14:20,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255659932] [2021-03-10 22:14:20,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 508 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 508 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:14:20,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 22:14:20,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:14:20,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:14:20,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:14:20,819 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:14:20,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:14:20,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-03-10 22:14:20,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327847775] [2021-03-10 22:14:20,819 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:14:20,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:14:20,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:14:20,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:14:20,820 INFO L87 Difference]: Start difference. First operand 116 states and 241 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:21,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:14:21,102 INFO L93 Difference]: Finished difference Result 138 states and 279 transitions. [2021-03-10 22:14:21,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:14:21,103 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:14:21,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:14:21,103 INFO L225 Difference]: With dead ends: 138 [2021-03-10 22:14:21,103 INFO L226 Difference]: Without dead ends: 138 [2021-03-10 22:14:21,103 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 229.6ms TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:14:21,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-03-10 22:14:21,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 112. [2021-03-10 22:14:21,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.054054054054054) internal successors, (228), 111 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:21,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 228 transitions. [2021-03-10 22:14:21,104 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 228 transitions. Word has length 19 [2021-03-10 22:14:21,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:14:21,105 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 228 transitions. [2021-03-10 22:14:21,105 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:21,105 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 228 transitions. [2021-03-10 22:14:21,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:14:21,105 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:14:21,105 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:14:21,305 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 508 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25017 [2021-03-10 22:14:21,305 INFO L428 AbstractCegarLoop]: === Iteration 514 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:14:21,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:14:21,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1620505393, now seen corresponding path program 508 times [2021-03-10 22:14:21,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:14:21,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816500810] [2021-03-10 22:14:21,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:14:21,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:14:21,408 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:14:21,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816500810] [2021-03-10 22:14:21,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583051484] [2021-03-10 22:14:21,408 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 509 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 509 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:14:21,523 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:14:21,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:14:21,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:14:21,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:14:21,743 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:14:21,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:14:21,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-03-10 22:14:21,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124393612] [2021-03-10 22:14:21,744 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:14:21,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:14:21,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:14:21,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:14:21,744 INFO L87 Difference]: Start difference. First operand 112 states and 228 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:21,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:14:21,958 INFO L93 Difference]: Finished difference Result 120 states and 238 transitions. [2021-03-10 22:14:21,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:14:21,959 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:14:21,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:14:21,959 INFO L225 Difference]: With dead ends: 120 [2021-03-10 22:14:21,959 INFO L226 Difference]: Without dead ends: 112 [2021-03-10 22:14:21,959 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 259.0ms TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:14:21,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-03-10 22:14:21,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 110. [2021-03-10 22:14:21,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.0458715596330275) internal successors, (223), 109 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:21,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 223 transitions. [2021-03-10 22:14:21,960 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 223 transitions. Word has length 19 [2021-03-10 22:14:21,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:14:21,960 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 223 transitions. [2021-03-10 22:14:21,960 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:21,960 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 223 transitions. [2021-03-10 22:14:21,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:14:21,960 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:14:21,960 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:14:22,161 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 509 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25021 [2021-03-10 22:14:22,161 INFO L428 AbstractCegarLoop]: === Iteration 515 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:14:22,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:14:22,161 INFO L82 PathProgramCache]: Analyzing trace with hash -470873217, now seen corresponding path program 509 times [2021-03-10 22:14:22,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:14:22,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500934691] [2021-03-10 22:14:22,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:14:22,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:14:22,287 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:14:22,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500934691] [2021-03-10 22:14:22,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572852813] [2021-03-10 22:14:22,287 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 510 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 510 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:14:22,408 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 22:14:22,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:14:22,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:14:22,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:14:22,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:14:22,861 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:22,865 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:14:22,866 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:23,003 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 48 [2021-03-10 22:14:23,004 INFO L628 ElimStorePlain]: treesize reduction 86, result has 48.5 percent of original size [2021-03-10 22:14:23,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:14:23,009 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:23,059 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:14:23,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:14:23,065 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:23,113 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:14:23,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:14:23,118 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:23,164 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:14:23,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:14:23,170 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:23,214 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:14:23,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:14:23,219 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:23,261 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:14:23,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:14:23,266 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:23,306 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:14:23,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:14:23,310 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:23,349 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:14:23,350 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:14:23,350 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:199, output treesize:13 [2021-03-10 22:14:23,402 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:14:23,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:14:23,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 22:14:23,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229968793] [2021-03-10 22:14:23,402 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:14:23,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:14:23,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:14:23,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:14:23,402 INFO L87 Difference]: Start difference. First operand 110 states and 223 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:24,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:14:24,345 INFO L93 Difference]: Finished difference Result 143 states and 277 transitions. [2021-03-10 22:14:24,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 22:14:24,346 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:14:24,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:14:24,346 INFO L225 Difference]: With dead ends: 143 [2021-03-10 22:14:24,346 INFO L226 Difference]: Without dead ends: 143 [2021-03-10 22:14:24,347 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 995.2ms TimeCoverageRelationStatistics Valid=164, Invalid=706, Unknown=0, NotChecked=0, Total=870 [2021-03-10 22:14:24,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-03-10 22:14:24,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 110. [2021-03-10 22:14:24,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.0458715596330275) internal successors, (223), 109 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:24,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 223 transitions. [2021-03-10 22:14:24,348 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 223 transitions. Word has length 19 [2021-03-10 22:14:24,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:14:24,348 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 223 transitions. [2021-03-10 22:14:24,348 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:24,348 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 223 transitions. [2021-03-10 22:14:24,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:14:24,348 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:14:24,348 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:14:24,548 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 510 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25031 [2021-03-10 22:14:24,548 INFO L428 AbstractCegarLoop]: === Iteration 516 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:14:24,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:14:24,548 INFO L82 PathProgramCache]: Analyzing trace with hash -918210940, now seen corresponding path program 510 times [2021-03-10 22:14:24,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:14:24,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537470511] [2021-03-10 22:14:24,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:14:24,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:14:24,670 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:14:24,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537470511] [2021-03-10 22:14:24,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884370501] [2021-03-10 22:14:24,670 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 511 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 511 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:14:24,786 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 22:14:24,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:14:24,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:14:24,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:14:24,962 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:14:24,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:14:24,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-10 22:14:24,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170568946] [2021-03-10 22:14:24,962 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:14:24,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:14:24,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:14:24,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:14:24,963 INFO L87 Difference]: Start difference. First operand 110 states and 223 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:25,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:14:25,530 INFO L93 Difference]: Finished difference Result 169 states and 322 transitions. [2021-03-10 22:14:25,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 22:14:25,531 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:14:25,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:14:25,531 INFO L225 Difference]: With dead ends: 169 [2021-03-10 22:14:25,531 INFO L226 Difference]: Without dead ends: 169 [2021-03-10 22:14:25,532 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 551.6ms TimeCoverageRelationStatistics Valid=139, Invalid=511, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:14:25,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-03-10 22:14:25,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 113. [2021-03-10 22:14:25,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0892857142857144) internal successors, (234), 112 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:25,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 234 transitions. [2021-03-10 22:14:25,533 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 234 transitions. Word has length 19 [2021-03-10 22:14:25,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:14:25,533 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 234 transitions. [2021-03-10 22:14:25,533 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:25,533 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 234 transitions. [2021-03-10 22:14:25,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:14:25,533 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:14:25,533 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:14:25,733 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25052,511 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:14:25,733 INFO L428 AbstractCegarLoop]: === Iteration 517 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:14:25,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:14:25,734 INFO L82 PathProgramCache]: Analyzing trace with hash -1453440742, now seen corresponding path program 511 times [2021-03-10 22:14:25,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:14:25,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040362045] [2021-03-10 22:14:25,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:14:25,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:14:25,854 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:14:25,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040362045] [2021-03-10 22:14:25,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715382073] [2021-03-10 22:14:25,855 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 512 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 512 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:14:25,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:14:25,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:14:25,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:14:26,121 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:14:26,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:14:26,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-03-10 22:14:26,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235701035] [2021-03-10 22:14:26,122 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:14:26,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:14:26,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:14:26,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:14:26,122 INFO L87 Difference]: Start difference. First operand 113 states and 234 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:26,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:14:26,399 INFO L93 Difference]: Finished difference Result 134 states and 270 transitions. [2021-03-10 22:14:26,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:14:26,400 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:14:26,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:14:26,400 INFO L225 Difference]: With dead ends: 134 [2021-03-10 22:14:26,400 INFO L226 Difference]: Without dead ends: 134 [2021-03-10 22:14:26,400 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 274.7ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:14:26,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-03-10 22:14:26,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 113. [2021-03-10 22:14:26,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0892857142857144) internal successors, (234), 112 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:26,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 234 transitions. [2021-03-10 22:14:26,401 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 234 transitions. Word has length 19 [2021-03-10 22:14:26,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:14:26,401 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 234 transitions. [2021-03-10 22:14:26,401 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:26,401 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 234 transitions. [2021-03-10 22:14:26,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:14:26,402 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:14:26,402 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:14:26,602 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 512 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25060 [2021-03-10 22:14:26,602 INFO L428 AbstractCegarLoop]: === Iteration 518 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:14:26,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:14:26,602 INFO L82 PathProgramCache]: Analyzing trace with hash -1818161277, now seen corresponding path program 512 times [2021-03-10 22:14:26,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:14:26,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584799078] [2021-03-10 22:14:26,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:14:26,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:14:26,721 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:14:26,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584799078] [2021-03-10 22:14:26,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429737450] [2021-03-10 22:14:26,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 513 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 513 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:14:26,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:14:26,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:14:26,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:14:26,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:14:27,334 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:14:27,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:14:27,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 22:14:27,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399861943] [2021-03-10 22:14:27,335 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:14:27,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:14:27,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:14:27,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:14:27,335 INFO L87 Difference]: Start difference. First operand 113 states and 234 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:28,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:14:28,222 INFO L93 Difference]: Finished difference Result 151 states and 294 transitions. [2021-03-10 22:14:28,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 22:14:28,223 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:14:28,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:14:28,223 INFO L225 Difference]: With dead ends: 151 [2021-03-10 22:14:28,223 INFO L226 Difference]: Without dead ends: 147 [2021-03-10 22:14:28,223 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 973.3ms TimeCoverageRelationStatistics Valid=130, Invalid=682, Unknown=0, NotChecked=0, Total=812 [2021-03-10 22:14:28,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-03-10 22:14:28,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 112. [2021-03-10 22:14:28,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.081081081081081) internal successors, (231), 111 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:28,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 231 transitions. [2021-03-10 22:14:28,224 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 231 transitions. Word has length 19 [2021-03-10 22:14:28,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:14:28,224 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 231 transitions. [2021-03-10 22:14:28,224 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:28,224 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 231 transitions. [2021-03-10 22:14:28,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:14:28,224 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:14:28,224 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:14:28,425 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25064,513 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:14:28,425 INFO L428 AbstractCegarLoop]: === Iteration 519 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:14:28,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:14:28,425 INFO L82 PathProgramCache]: Analyzing trace with hash -865695420, now seen corresponding path program 513 times [2021-03-10 22:14:28,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:14:28,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119163237] [2021-03-10 22:14:28,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:14:28,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:14:28,540 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:14:28,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119163237] [2021-03-10 22:14:28,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587862809] [2021-03-10 22:14:28,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 514 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 514 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:14:28,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:14:28,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:14:28,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:14:28,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:14:28,779 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:14:28,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:14:28,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-03-10 22:14:28,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052230590] [2021-03-10 22:14:28,780 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 22:14:28,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:14:28,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 22:14:28,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-03-10 22:14:28,780 INFO L87 Difference]: Start difference. First operand 112 states and 231 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:29,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:14:29,084 INFO L93 Difference]: Finished difference Result 135 states and 273 transitions. [2021-03-10 22:14:29,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:14:29,085 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:14:29,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:14:29,085 INFO L225 Difference]: With dead ends: 135 [2021-03-10 22:14:29,085 INFO L226 Difference]: Without dead ends: 135 [2021-03-10 22:14:29,085 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 244.4ms TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:14:29,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-03-10 22:14:29,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 112. [2021-03-10 22:14:29,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.081081081081081) internal successors, (231), 111 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:29,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 231 transitions. [2021-03-10 22:14:29,086 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 231 transitions. Word has length 19 [2021-03-10 22:14:29,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:14:29,086 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 231 transitions. [2021-03-10 22:14:29,086 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:29,086 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 231 transitions. [2021-03-10 22:14:29,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:14:29,086 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:14:29,086 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:14:29,287 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25085,514 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:14:29,287 INFO L428 AbstractCegarLoop]: === Iteration 520 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:14:29,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:14:29,287 INFO L82 PathProgramCache]: Analyzing trace with hash 1464113487, now seen corresponding path program 514 times [2021-03-10 22:14:29,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:14:29,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222794721] [2021-03-10 22:14:29,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:14:29,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:14:29,402 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:14:29,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222794721] [2021-03-10 22:14:29,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087392751] [2021-03-10 22:14:29,402 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 515 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 515 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:14:29,518 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:14:29,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:14:29,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:14:29,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:14:30,034 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:14:30,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:14:30,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-03-10 22:14:30,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854553267] [2021-03-10 22:14:30,035 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 22:14:30,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:14:30,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 22:14:30,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-03-10 22:14:30,035 INFO L87 Difference]: Start difference. First operand 112 states and 231 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:30,550 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 41 [2021-03-10 22:14:30,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:14:30,801 INFO L93 Difference]: Finished difference Result 146 states and 282 transitions. [2021-03-10 22:14:30,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:14:30,801 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:14:30,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:14:30,802 INFO L225 Difference]: With dead ends: 146 [2021-03-10 22:14:30,802 INFO L226 Difference]: Without dead ends: 140 [2021-03-10 22:14:30,802 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 939.7ms TimeCoverageRelationStatistics Valid=109, Invalid=541, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:14:30,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-03-10 22:14:30,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 111. [2021-03-10 22:14:30,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.0727272727272728) internal successors, (228), 110 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:30,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 228 transitions. [2021-03-10 22:14:30,803 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 228 transitions. Word has length 19 [2021-03-10 22:14:30,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:14:30,803 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 228 transitions. [2021-03-10 22:14:30,803 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:30,803 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 228 transitions. [2021-03-10 22:14:30,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:14:30,803 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:14:30,803 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:14:31,003 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25089,515 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:14:31,004 INFO L428 AbstractCegarLoop]: === Iteration 521 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:14:31,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:14:31,004 INFO L82 PathProgramCache]: Analyzing trace with hash 174540378, now seen corresponding path program 515 times [2021-03-10 22:14:31,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:14:31,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202904073] [2021-03-10 22:14:31,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:14:31,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:14:31,126 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:14:31,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202904073] [2021-03-10 22:14:31,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112963918] [2021-03-10 22:14:31,126 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 516 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 516 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:14:31,243 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 22:14:31,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:14:31,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:14:31,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:14:31,343 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:14:31,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:14:31,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-03-10 22:14:31,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585296769] [2021-03-10 22:14:31,344 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:14:31,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:14:31,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:14:31,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:14:31,344 INFO L87 Difference]: Start difference. First operand 111 states and 228 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:31,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:14:31,664 INFO L93 Difference]: Finished difference Result 136 states and 276 transitions. [2021-03-10 22:14:31,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:14:31,665 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:14:31,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:14:31,665 INFO L225 Difference]: With dead ends: 136 [2021-03-10 22:14:31,666 INFO L226 Difference]: Without dead ends: 136 [2021-03-10 22:14:31,666 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 248.6ms TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:14:31,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-03-10 22:14:31,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 111. [2021-03-10 22:14:31,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.0727272727272728) internal successors, (228), 110 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:31,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 228 transitions. [2021-03-10 22:14:31,667 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 228 transitions. Word has length 19 [2021-03-10 22:14:31,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:14:31,667 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 228 transitions. [2021-03-10 22:14:31,667 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:31,667 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 228 transitions. [2021-03-10 22:14:31,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:14:31,667 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:14:31,667 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:14:31,867 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25118,516 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:14:31,867 INFO L428 AbstractCegarLoop]: === Iteration 522 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:14:31,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:14:31,867 INFO L82 PathProgramCache]: Analyzing trace with hash 135416067, now seen corresponding path program 516 times [2021-03-10 22:14:31,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:14:31,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169747375] [2021-03-10 22:14:31,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:14:31,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:14:31,984 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:14:31,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169747375] [2021-03-10 22:14:31,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842844991] [2021-03-10 22:14:31,984 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 517 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 517 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:14:32,104 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:14:32,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:14:32,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:14:32,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:14:32,376 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:14:32,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:14:32,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-10 22:14:32,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432817588] [2021-03-10 22:14:32,376 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:14:32,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:14:32,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:14:32,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:14:32,377 INFO L87 Difference]: Start difference. First operand 111 states and 228 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:32,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:14:32,945 INFO L93 Difference]: Finished difference Result 141 states and 270 transitions. [2021-03-10 22:14:32,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:14:32,946 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:14:32,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:14:32,946 INFO L225 Difference]: With dead ends: 141 [2021-03-10 22:14:32,946 INFO L226 Difference]: Without dead ends: 133 [2021-03-10 22:14:32,946 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 647.9ms TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:14:32,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-03-10 22:14:32,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 110. [2021-03-10 22:14:32,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.0642201834862384) internal successors, (225), 109 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:32,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 225 transitions. [2021-03-10 22:14:32,947 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 225 transitions. Word has length 19 [2021-03-10 22:14:32,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:14:32,947 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 225 transitions. [2021-03-10 22:14:32,947 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:32,947 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 225 transitions. [2021-03-10 22:14:32,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:14:32,948 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:14:32,948 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:14:33,148 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25122,517 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:14:33,148 INFO L428 AbstractCegarLoop]: === Iteration 523 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:14:33,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:14:33,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1512107592, now seen corresponding path program 517 times [2021-03-10 22:14:33,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:14:33,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038278926] [2021-03-10 22:14:33,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:14:33,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:14:33,257 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:14:33,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038278926] [2021-03-10 22:14:33,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097601006] [2021-03-10 22:14:33,257 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 518 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 518 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:14:33,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:14:33,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:14:33,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:14:33,472 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:14:33,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:14:33,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-03-10 22:14:33,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900909856] [2021-03-10 22:14:33,473 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 22:14:33,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:14:33,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 22:14:33,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-03-10 22:14:33,473 INFO L87 Difference]: Start difference. First operand 110 states and 225 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:33,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:14:33,741 INFO L93 Difference]: Finished difference Result 152 states and 292 transitions. [2021-03-10 22:14:33,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:14:33,742 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:14:33,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:14:33,742 INFO L225 Difference]: With dead ends: 152 [2021-03-10 22:14:33,742 INFO L226 Difference]: Without dead ends: 152 [2021-03-10 22:14:33,742 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 218.3ms TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:14:33,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-03-10 22:14:33,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 104. [2021-03-10 22:14:33,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.029126213592233) internal successors, (209), 103 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:33,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 209 transitions. [2021-03-10 22:14:33,744 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 209 transitions. Word has length 19 [2021-03-10 22:14:33,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:14:33,744 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 209 transitions. [2021-03-10 22:14:33,744 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:33,744 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 209 transitions. [2021-03-10 22:14:33,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 22:14:33,744 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:14:33,744 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:14:33,944 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25132,518 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:14:33,944 INFO L428 AbstractCegarLoop]: === Iteration 524 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:14:33,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:14:33,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1050497555, now seen corresponding path program 518 times [2021-03-10 22:14:33,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:14:33,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682914575] [2021-03-10 22:14:33,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:14:33,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:14:34,049 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:14:34,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682914575] [2021-03-10 22:14:34,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722302651] [2021-03-10 22:14:34,049 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 519 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 519 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:14:34,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:14:34,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:14:34,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:14:34,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:14:34,372 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:14:34,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:14:34,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-03-10 22:14:34,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096857877] [2021-03-10 22:14:34,372 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 22:14:34,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:14:34,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 22:14:34,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-03-10 22:14:34,372 INFO L87 Difference]: Start difference. First operand 104 states and 209 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:34,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:14:34,815 INFO L93 Difference]: Finished difference Result 117 states and 227 transitions. [2021-03-10 22:14:34,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 22:14:34,816 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 22:14:34,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:14:34,816 INFO L225 Difference]: With dead ends: 117 [2021-03-10 22:14:34,816 INFO L226 Difference]: Without dead ends: 107 [2021-03-10 22:14:34,816 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 511.4ms TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:14:34,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-03-10 22:14:34,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 104. [2021-03-10 22:14:34,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.0194174757281553) internal successors, (208), 103 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:34,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 208 transitions. [2021-03-10 22:14:34,817 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 208 transitions. Word has length 19 [2021-03-10 22:14:34,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:14:34,817 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 208 transitions. [2021-03-10 22:14:34,817 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:34,817 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 208 transitions. [2021-03-10 22:14:34,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:14:34,817 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:14:34,817 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:14:35,017 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 519 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25136 [2021-03-10 22:14:35,018 INFO L428 AbstractCegarLoop]: === Iteration 525 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:14:35,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:14:35,018 INFO L82 PathProgramCache]: Analyzing trace with hash 40501395, now seen corresponding path program 519 times [2021-03-10 22:14:35,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:14:35,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935061290] [2021-03-10 22:14:35,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:14:35,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:14:35,369 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:14:35,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935061290] [2021-03-10 22:14:35,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870615977] [2021-03-10 22:14:35,369 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 520 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 520 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:14:35,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:14:35,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:14:35,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 22:14:35,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:14:36,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:36,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:36,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:14:36,555 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:36,559 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:14:36,560 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:36,563 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:14:36,564 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:36,568 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:14:36,569 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:36,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:36,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:14:36,574 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:36,669 INFO L628 ElimStorePlain]: treesize reduction 156, result has 28.4 percent of original size [2021-03-10 22:14:36,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:14:36,674 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:36,707 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:14:36,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:14:36,723 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:36,755 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:14:36,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:14:36,759 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:36,789 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:14:36,790 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:14:36,790 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 4 variables, input treesize:356, output treesize:46 [2021-03-10 22:14:36,919 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:14:36,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:14:36,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-03-10 22:14:36,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781160051] [2021-03-10 22:14:36,919 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 22:14:36,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:14:36,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 22:14:36,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:14:36,920 INFO L87 Difference]: Start difference. First operand 104 states and 208 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:37,467 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2021-03-10 22:14:37,721 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 67 [2021-03-10 22:14:38,096 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 67 [2021-03-10 22:14:38,315 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 64 [2021-03-10 22:14:38,642 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2021-03-10 22:14:39,002 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 63 [2021-03-10 22:14:39,190 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 64 [2021-03-10 22:14:39,590 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2021-03-10 22:14:39,912 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 63 [2021-03-10 22:14:40,134 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 62 [2021-03-10 22:14:40,529 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2021-03-10 22:14:40,846 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2021-03-10 22:14:41,438 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 64 [2021-03-10 22:14:41,764 WARN L205 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 68 [2021-03-10 22:14:41,961 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 68 [2021-03-10 22:14:42,094 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2021-03-10 22:14:42,438 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 67 [2021-03-10 22:14:42,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:14:42,514 INFO L93 Difference]: Finished difference Result 230 states and 459 transitions. [2021-03-10 22:14:42,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-03-10 22:14:42,515 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:14:42,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:14:42,515 INFO L225 Difference]: With dead ends: 230 [2021-03-10 22:14:42,515 INFO L226 Difference]: Without dead ends: 196 [2021-03-10 22:14:42,515 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 5587.5ms TimeCoverageRelationStatistics Valid=285, Invalid=2067, Unknown=0, NotChecked=0, Total=2352 [2021-03-10 22:14:42,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-03-10 22:14:42,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 110. [2021-03-10 22:14:42,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.0458715596330275) internal successors, (223), 109 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:42,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 223 transitions. [2021-03-10 22:14:42,517 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 223 transitions. Word has length 20 [2021-03-10 22:14:42,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:14:42,517 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 223 transitions. [2021-03-10 22:14:42,517 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:42,517 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 223 transitions. [2021-03-10 22:14:42,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:14:42,517 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:14:42,517 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:14:42,717 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 520 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25147 [2021-03-10 22:14:42,717 INFO L428 AbstractCegarLoop]: === Iteration 526 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:14:42,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:14:42,717 INFO L82 PathProgramCache]: Analyzing trace with hash -1637276287, now seen corresponding path program 520 times [2021-03-10 22:14:42,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:14:42,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482164313] [2021-03-10 22:14:42,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:14:42,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:14:43,111 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:14:43,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482164313] [2021-03-10 22:14:43,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730312099] [2021-03-10 22:14:43,112 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 521 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 521 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:14:43,230 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:14:43,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:14:43,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 22:14:43,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:14:44,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:44,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:44,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-03-10 22:14:44,258 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:44,261 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:14:44,263 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:44,266 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:14:44,267 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:44,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:44,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:14:44,272 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:44,365 INFO L628 ElimStorePlain]: treesize reduction 107, result has 36.3 percent of original size [2021-03-10 22:14:44,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:14:44,370 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:44,404 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:14:44,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:14:44,408 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:44,441 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:14:44,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:14:44,445 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:44,475 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:14:44,476 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:14:44,476 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 4 variables, input treesize:284, output treesize:46 [2021-03-10 22:14:44,604 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:14:44,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:14:44,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-03-10 22:14:44,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107175875] [2021-03-10 22:14:44,604 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 22:14:44,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:14:44,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 22:14:44,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:14:44,605 INFO L87 Difference]: Start difference. First operand 110 states and 223 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:45,248 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2021-03-10 22:14:45,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:14:45,672 INFO L93 Difference]: Finished difference Result 166 states and 329 transitions. [2021-03-10 22:14:45,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 22:14:45,673 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:14:45,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:14:45,673 INFO L225 Difference]: With dead ends: 166 [2021-03-10 22:14:45,673 INFO L226 Difference]: Without dead ends: 144 [2021-03-10 22:14:45,673 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1228.7ms TimeCoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2021-03-10 22:14:45,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-03-10 22:14:45,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 112. [2021-03-10 22:14:45,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.045045045045045) internal successors, (227), 111 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:45,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 227 transitions. [2021-03-10 22:14:45,674 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 227 transitions. Word has length 20 [2021-03-10 22:14:45,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:14:45,674 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 227 transitions. [2021-03-10 22:14:45,674 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:45,674 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 227 transitions. [2021-03-10 22:14:45,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:14:45,674 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:14:45,674 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:14:45,875 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 521 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25295 [2021-03-10 22:14:45,875 INFO L428 AbstractCegarLoop]: === Iteration 527 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:14:45,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:14:45,875 INFO L82 PathProgramCache]: Analyzing trace with hash 759200197, now seen corresponding path program 521 times [2021-03-10 22:14:45,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:14:45,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869314822] [2021-03-10 22:14:45,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:14:45,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:14:46,227 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:14:46,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869314822] [2021-03-10 22:14:46,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203833624] [2021-03-10 22:14:46,227 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 522 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 522 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:14:46,346 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:14:46,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:14:46,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 22:14:46,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:14:46,549 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2021-03-10 22:14:47,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:47,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:47,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:14:47,323 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:47,326 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:14:47,327 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:47,331 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:14:47,332 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:47,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:47,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:47,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:14:47,339 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:47,342 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:14:47,343 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:47,443 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 33 [2021-03-10 22:14:47,444 INFO L628 ElimStorePlain]: treesize reduction 160, result has 26.6 percent of original size [2021-03-10 22:14:47,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:14:47,448 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:47,490 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:14:47,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:14:47,494 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:47,527 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:14:47,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:14:47,531 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:47,561 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:14:47,562 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:14:47,562 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 4 variables, input treesize:356, output treesize:46 [2021-03-10 22:14:47,692 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:14:47,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:14:47,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-03-10 22:14:47,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811658522] [2021-03-10 22:14:47,692 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 22:14:47,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:14:47,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 22:14:47,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:14:47,693 INFO L87 Difference]: Start difference. First operand 112 states and 227 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:48,453 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 53 [2021-03-10 22:14:48,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:14:48,799 INFO L93 Difference]: Finished difference Result 163 states and 323 transitions. [2021-03-10 22:14:48,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 22:14:48,800 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:14:48,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:14:48,801 INFO L225 Difference]: With dead ends: 163 [2021-03-10 22:14:48,801 INFO L226 Difference]: Without dead ends: 144 [2021-03-10 22:14:48,801 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1342.4ms TimeCoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2021-03-10 22:14:48,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-03-10 22:14:48,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 113. [2021-03-10 22:14:48,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.044642857142857) internal successors, (229), 112 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:48,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 229 transitions. [2021-03-10 22:14:48,805 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 229 transitions. Word has length 20 [2021-03-10 22:14:48,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:14:48,805 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 229 transitions. [2021-03-10 22:14:48,805 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:48,805 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 229 transitions. [2021-03-10 22:14:48,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:14:48,805 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:14:48,805 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:14:49,005 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25482,522 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:14:49,006 INFO L428 AbstractCegarLoop]: === Iteration 528 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:14:49,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:14:49,006 INFO L82 PathProgramCache]: Analyzing trace with hash -271872767, now seen corresponding path program 522 times [2021-03-10 22:14:49,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:14:49,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282786202] [2021-03-10 22:14:49,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:14:49,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:14:49,349 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:14:49,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282786202] [2021-03-10 22:14:49,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154660658] [2021-03-10 22:14:49,349 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 523 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 523 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:14:49,467 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:14:49,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:14:49,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 22:14:49,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:14:50,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:50,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:50,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:14:50,456 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:50,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:50,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:50,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-03-10 22:14:50,462 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:50,465 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:14:50,467 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:50,470 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:14:50,471 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:50,565 INFO L628 ElimStorePlain]: treesize reduction 121, result has 33.5 percent of original size [2021-03-10 22:14:50,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:14:50,569 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:50,604 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:14:50,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:14:50,608 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:50,641 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:14:50,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:14:50,645 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:50,676 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:14:50,677 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:14:50,677 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 4 variables, input treesize:284, output treesize:46 [2021-03-10 22:14:50,807 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:14:50,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:14:50,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-03-10 22:14:50,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155712407] [2021-03-10 22:14:50,808 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 22:14:50,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:14:50,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 22:14:50,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:14:50,808 INFO L87 Difference]: Start difference. First operand 113 states and 229 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:51,617 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2021-03-10 22:14:51,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:14:51,891 INFO L93 Difference]: Finished difference Result 160 states and 317 transitions. [2021-03-10 22:14:51,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 22:14:51,892 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:14:51,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:14:51,892 INFO L225 Difference]: With dead ends: 160 [2021-03-10 22:14:51,892 INFO L226 Difference]: Without dead ends: 144 [2021-03-10 22:14:51,892 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1299.4ms TimeCoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2021-03-10 22:14:51,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-03-10 22:14:51,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 114. [2021-03-10 22:14:51,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.0442477876106193) internal successors, (231), 113 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:51,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 231 transitions. [2021-03-10 22:14:51,893 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 231 transitions. Word has length 20 [2021-03-10 22:14:51,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:14:51,893 INFO L480 AbstractCegarLoop]: Abstraction has 114 states and 231 transitions. [2021-03-10 22:14:51,893 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:51,893 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 231 transitions. [2021-03-10 22:14:51,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:14:51,894 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:14:51,894 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:14:52,094 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 523 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25576 [2021-03-10 22:14:52,094 INFO L428 AbstractCegarLoop]: === Iteration 529 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:14:52,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:14:52,094 INFO L82 PathProgramCache]: Analyzing trace with hash 2050171461, now seen corresponding path program 523 times [2021-03-10 22:14:52,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:14:52,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469569420] [2021-03-10 22:14:52,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:14:52,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:14:52,539 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:14:52,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469569420] [2021-03-10 22:14:52,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575653543] [2021-03-10 22:14:52,539 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 524 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 524 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:14:52,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:14:52,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 22:14:52,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:14:52,861 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2021-03-10 22:14:53,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:53,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:53,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-03-10 22:14:53,783 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:53,787 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:14:53,788 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:53,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:53,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:53,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:14:53,794 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:53,797 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:14:53,798 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:53,892 INFO L628 ElimStorePlain]: treesize reduction 105, result has 37.5 percent of original size [2021-03-10 22:14:53,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:14:53,897 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:53,932 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:14:53,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:14:53,936 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:53,971 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:14:53,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:14:53,975 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:54,007 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:14:54,008 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:14:54,008 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 4 variables, input treesize:284, output treesize:46 [2021-03-10 22:14:54,142 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:14:54,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:14:54,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-03-10 22:14:54,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408201232] [2021-03-10 22:14:54,142 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 22:14:54,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:14:54,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 22:14:54,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:14:54,143 INFO L87 Difference]: Start difference. First operand 114 states and 231 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:54,391 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 53 [2021-03-10 22:14:54,670 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 44 [2021-03-10 22:14:54,842 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 35 [2021-03-10 22:14:55,379 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 54 [2021-03-10 22:14:55,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:14:55,478 INFO L93 Difference]: Finished difference Result 166 states and 325 transitions. [2021-03-10 22:14:55,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:14:55,479 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:14:55,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:14:55,479 INFO L225 Difference]: With dead ends: 166 [2021-03-10 22:14:55,479 INFO L226 Difference]: Without dead ends: 153 [2021-03-10 22:14:55,480 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1842.2ms TimeCoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:14:55,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-03-10 22:14:55,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 115. [2021-03-10 22:14:55,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.043859649122807) internal successors, (233), 114 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:55,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 233 transitions. [2021-03-10 22:14:55,481 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 233 transitions. Word has length 20 [2021-03-10 22:14:55,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:14:55,481 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 233 transitions. [2021-03-10 22:14:55,481 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:55,481 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 233 transitions. [2021-03-10 22:14:55,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:14:55,481 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:14:55,481 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:14:55,681 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25672,524 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:14:55,681 INFO L428 AbstractCegarLoop]: === Iteration 530 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:14:55,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:14:55,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1570886785, now seen corresponding path program 524 times [2021-03-10 22:14:55,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:14:55,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071243477] [2021-03-10 22:14:55,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:14:55,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:14:56,077 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:14:56,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071243477] [2021-03-10 22:14:56,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414916712] [2021-03-10 22:14:56,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 525 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 525 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:14:56,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:14:56,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:14:56,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 22:14:56,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:14:57,426 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:14:57,428 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:57,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:57,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:57,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:14:57,435 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:57,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:57,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:57,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:14:57,444 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:57,449 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:14:57,450 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:57,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:14:57,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:14:57,457 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:57,708 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 65 [2021-03-10 22:14:57,708 INFO L628 ElimStorePlain]: treesize reduction 527, result has 18.2 percent of original size [2021-03-10 22:14:57,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:14:57,714 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:57,786 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:14:57,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:14:57,792 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:57,862 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:14:57,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:14:57,868 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:57,937 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:14:57,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:14:57,942 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:58,008 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:14:58,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:14:58,014 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:58,083 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:14:58,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:14:58,088 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:58,150 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:14:58,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:14:58,155 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:14:58,214 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:14:58,216 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:14:58,216 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 10 variables, input treesize:769, output treesize:73 [2021-03-10 22:14:58,445 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:14:58,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:14:58,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-03-10 22:14:58,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776015126] [2021-03-10 22:14:58,445 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 22:14:58,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:14:58,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 22:14:58,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:14:58,445 INFO L87 Difference]: Start difference. First operand 115 states and 233 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:14:58,720 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 65 [2021-03-10 22:14:59,012 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 55 [2021-03-10 22:14:59,208 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 46 [2021-03-10 22:14:59,381 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 45 [2021-03-10 22:14:59,889 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 28 [2021-03-10 22:15:00,183 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 66 [2021-03-10 22:15:00,532 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 70 [2021-03-10 22:15:00,783 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 56 [2021-03-10 22:15:01,114 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 60 [2021-03-10 22:15:01,315 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 47 [2021-03-10 22:15:01,564 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 51 [2021-03-10 22:15:01,738 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2021-03-10 22:15:01,928 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2021-03-10 22:15:02,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:15:02,092 INFO L93 Difference]: Finished difference Result 276 states and 526 transitions. [2021-03-10 22:15:02,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 22:15:02,093 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:15:02,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:15:02,094 INFO L225 Difference]: With dead ends: 276 [2021-03-10 22:15:02,094 INFO L226 Difference]: Without dead ends: 229 [2021-03-10 22:15:02,094 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 3940.7ms TimeCoverageRelationStatistics Valid=192, Invalid=1068, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 22:15:02,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-03-10 22:15:02,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 119. [2021-03-10 22:15:02,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.093220338983051) internal successors, (247), 118 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:15:02,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 247 transitions. [2021-03-10 22:15:02,095 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 247 transitions. Word has length 20 [2021-03-10 22:15:02,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:15:02,095 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 247 transitions. [2021-03-10 22:15:02,095 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:15:02,095 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 247 transitions. [2021-03-10 22:15:02,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:15:02,095 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:15:02,095 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:15:02,296 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 525 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25825 [2021-03-10 22:15:02,296 INFO L428 AbstractCegarLoop]: === Iteration 531 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:15:02,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:15:02,296 INFO L82 PathProgramCache]: Analyzing trace with hash -1353228433, now seen corresponding path program 525 times [2021-03-10 22:15:02,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:15:02,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276231672] [2021-03-10 22:15:02,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:15:02,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:15:02,855 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:15:02,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276231672] [2021-03-10 22:15:02,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030256564] [2021-03-10 22:15:02,856 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 526 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 526 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:15:02,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:15:02,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:15:02,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 22:15:02,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:15:03,237 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2021-03-10 22:15:04,248 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:15:04,249 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:04,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:04,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:04,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:15:04,257 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:04,263 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:15:04,264 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:04,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:04,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:04,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:15:04,271 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:04,279 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:15:04,280 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:04,285 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:15:04,286 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:04,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:04,292 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:04,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-03-10 22:15:04,294 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:04,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:04,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:04,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:15:04,301 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:04,305 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:15:04,311 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:04,316 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:15:04,317 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:04,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:04,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:04,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:15:04,324 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:04,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:04,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-03-10 22:15:04,331 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:04,442 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2021-03-10 22:15:04,442 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-03-10 22:15:04,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:15:04,447 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:04,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:15:04,453 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:04,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:15:04,458 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:04,496 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:15:04,498 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:15:04,498 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:467, output treesize:52 [2021-03-10 22:15:04,650 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:15:04,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:15:04,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-03-10 22:15:04,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348321904] [2021-03-10 22:15:04,651 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 22:15:04,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:15:04,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 22:15:04,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:15:04,651 INFO L87 Difference]: Start difference. First operand 119 states and 247 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:15:05,276 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2021-03-10 22:15:05,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:15:05,405 INFO L93 Difference]: Finished difference Result 167 states and 333 transitions. [2021-03-10 22:15:05,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:15:05,406 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:15:05,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:15:05,406 INFO L225 Difference]: With dead ends: 167 [2021-03-10 22:15:05,406 INFO L226 Difference]: Without dead ends: 148 [2021-03-10 22:15:05,407 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 1419.5ms TimeCoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:15:05,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-03-10 22:15:05,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 121. [2021-03-10 22:15:05,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.091666666666667) internal successors, (251), 120 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:15:05,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 251 transitions. [2021-03-10 22:15:05,408 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 251 transitions. Word has length 20 [2021-03-10 22:15:05,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:15:05,408 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 251 transitions. [2021-03-10 22:15:05,408 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:15:05,408 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 251 transitions. [2021-03-10 22:15:05,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:15:05,408 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:15:05,408 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:15:05,608 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 526 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25958 [2021-03-10 22:15:05,608 INFO L428 AbstractCegarLoop]: === Iteration 532 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:15:05,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:15:05,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1910665899, now seen corresponding path program 526 times [2021-03-10 22:15:05,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:15:05,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843333318] [2021-03-10 22:15:05,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:15:05,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:15:05,909 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2021-03-10 22:15:06,142 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:15:06,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843333318] [2021-03-10 22:15:06,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277888573] [2021-03-10 22:15:06,143 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 527 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 527 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:15:06,265 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:15:06,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:15:06,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 22:15:06,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:15:07,654 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:15:07,656 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:07,661 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:15:07,662 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:07,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:07,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:07,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:15:07,670 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:07,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:07,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:07,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-03-10 22:15:07,678 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:07,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:07,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:07,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:15:07,686 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:07,691 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:15:07,692 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:07,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:07,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:07,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:15:07,700 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:07,705 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:07,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:07,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-03-10 22:15:07,708 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:07,713 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:15:07,715 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:07,720 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:15:07,721 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:07,725 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:15:07,727 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:07,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:07,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:07,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-03-10 22:15:07,734 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:07,739 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:15:07,740 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:07,744 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:15:07,746 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:07,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:07,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:15:07,752 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:07,854 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2021-03-10 22:15:07,855 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-03-10 22:15:07,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:15:07,860 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:07,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:15:07,865 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:07,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:15:07,870 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:07,908 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:15:07,910 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:15:07,910 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 4 variables, input treesize:591, output treesize:52 [2021-03-10 22:15:08,062 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:15:08,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:15:08,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-03-10 22:15:08,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818702673] [2021-03-10 22:15:08,063 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 22:15:08,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:15:08,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 22:15:08,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:15:08,063 INFO L87 Difference]: Start difference. First operand 121 states and 251 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:15:08,573 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 58 [2021-03-10 22:15:08,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:15:08,682 INFO L93 Difference]: Finished difference Result 160 states and 320 transitions. [2021-03-10 22:15:08,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 22:15:08,682 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:15:08,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:15:08,683 INFO L225 Difference]: With dead ends: 160 [2021-03-10 22:15:08,683 INFO L226 Difference]: Without dead ends: 144 [2021-03-10 22:15:08,683 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1221.3ms TimeCoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:15:08,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-03-10 22:15:08,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 122. [2021-03-10 22:15:08,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.090909090909091) internal successors, (253), 121 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:15:08,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 253 transitions. [2021-03-10 22:15:08,684 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 253 transitions. Word has length 20 [2021-03-10 22:15:08,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:15:08,684 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 253 transitions. [2021-03-10 22:15:08,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:15:08,684 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 253 transitions. [2021-03-10 22:15:08,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:15:08,684 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:15:08,684 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:15:08,885 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26134,527 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:15:08,885 INFO L428 AbstractCegarLoop]: === Iteration 533 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:15:08,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:15:08,885 INFO L82 PathProgramCache]: Analyzing trace with hash -62257169, now seen corresponding path program 527 times [2021-03-10 22:15:08,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:15:08,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078016361] [2021-03-10 22:15:08,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:15:08,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:15:09,252 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:15:09,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078016361] [2021-03-10 22:15:09,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803404917] [2021-03-10 22:15:09,252 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 528 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 528 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:15:09,371 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:15:09,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:15:09,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 22:15:09,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:15:09,597 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2021-03-10 22:15:10,611 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:15:10,612 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:10,617 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:15:10,618 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:10,623 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:15:10,624 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:10,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:10,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:10,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:15:10,632 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:10,636 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:15:10,637 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:10,642 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:15:10,644 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:10,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:10,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:10,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:15:10,651 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:10,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:10,656 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:10,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:15:10,658 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:10,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:10,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:10,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-03-10 22:15:10,666 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:10,670 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:15:10,671 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:10,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:10,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:10,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-03-10 22:15:10,679 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:10,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:10,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:15:10,685 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:10,777 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-03-10 22:15:10,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:15:10,783 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:10,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:15:10,788 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:10,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:15:10,792 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:10,830 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:15:10,832 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:15:10,832 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:467, output treesize:52 [2021-03-10 22:15:10,969 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:15:10,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:15:10,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-03-10 22:15:10,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473371391] [2021-03-10 22:15:10,970 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 22:15:10,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:15:10,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 22:15:10,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:15:10,970 INFO L87 Difference]: Start difference. First operand 122 states and 253 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:15:11,152 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 41 [2021-03-10 22:15:11,379 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 33 [2021-03-10 22:15:12,028 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2021-03-10 22:15:12,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:15:12,134 INFO L93 Difference]: Finished difference Result 172 states and 345 transitions. [2021-03-10 22:15:12,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:15:12,135 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:15:12,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:15:12,135 INFO L225 Difference]: With dead ends: 172 [2021-03-10 22:15:12,135 INFO L226 Difference]: Without dead ends: 159 [2021-03-10 22:15:12,135 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1558.2ms TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:15:12,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-03-10 22:15:12,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 123. [2021-03-10 22:15:12,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 2.0901639344262297) internal successors, (255), 122 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:15:12,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 255 transitions. [2021-03-10 22:15:12,136 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 255 transitions. Word has length 20 [2021-03-10 22:15:12,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:15:12,136 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 255 transitions. [2021-03-10 22:15:12,136 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:15:12,136 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 255 transitions. [2021-03-10 22:15:12,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:15:12,136 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:15:12,137 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:15:12,337 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 528 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26281 [2021-03-10 22:15:12,337 INFO L428 AbstractCegarLoop]: === Iteration 534 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:15:12,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:15:12,337 INFO L82 PathProgramCache]: Analyzing trace with hash -541541845, now seen corresponding path program 528 times [2021-03-10 22:15:12,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:15:12,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058050156] [2021-03-10 22:15:12,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:15:12,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:15:12,746 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:15:12,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058050156] [2021-03-10 22:15:12,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688789082] [2021-03-10 22:15:12,746 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 529 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 529 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:15:12,867 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:15:12,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:15:12,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 22:15:12,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:15:14,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:14,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:14,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:15:14,155 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:14,161 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:15:14,163 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:14,169 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:15:14,170 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:14,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:14,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:14,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:15:14,179 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:14,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:14,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:14,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-03-10 22:15:14,190 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:14,197 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:15:14,198 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:14,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:14,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:14,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:15:14,207 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:14,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:14,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:14,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-03-10 22:15:14,217 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:14,223 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:15:14,225 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:14,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:14,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:14,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:15:14,234 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:14,240 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:15:14,242 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:14,247 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:15:14,248 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:14,254 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:15:14,255 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:14,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:14,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:14,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:15:14,263 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:14,268 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:15:14,269 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:14,274 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:14,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:15:14,276 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:14,454 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2021-03-10 22:15:14,455 INFO L628 ElimStorePlain]: treesize reduction 18, result has 87.2 percent of original size [2021-03-10 22:15:14,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:15:14,461 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:14,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:15:14,467 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:14,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:15:14,473 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:14,477 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 6 treesize of output 2 [2021-03-10 22:15:14,479 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:14,550 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:15:14,552 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:15:14,552 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 5 variables, input treesize:709, output treesize:79 [2021-03-10 22:15:14,804 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:15:14,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:15:14,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-03-10 22:15:14,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025696422] [2021-03-10 22:15:14,805 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 22:15:14,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:15:14,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 22:15:14,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:15:14,805 INFO L87 Difference]: Start difference. First operand 123 states and 255 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:15:15,029 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 55 [2021-03-10 22:15:15,378 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 46 [2021-03-10 22:15:15,558 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2021-03-10 22:15:16,036 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2021-03-10 22:15:16,287 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 56 [2021-03-10 22:15:16,578 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 60 [2021-03-10 22:15:16,761 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 47 [2021-03-10 22:15:17,023 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2021-03-10 22:15:17,183 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2021-03-10 22:15:17,360 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2021-03-10 22:15:17,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:15:17,497 INFO L93 Difference]: Finished difference Result 260 states and 506 transitions. [2021-03-10 22:15:17,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 22:15:17,498 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:15:17,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:15:17,498 INFO L225 Difference]: With dead ends: 260 [2021-03-10 22:15:17,498 INFO L226 Difference]: Without dead ends: 220 [2021-03-10 22:15:17,498 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 2947.2ms TimeCoverageRelationStatistics Valid=147, Invalid=845, Unknown=0, NotChecked=0, Total=992 [2021-03-10 22:15:17,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-03-10 22:15:17,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 124. [2021-03-10 22:15:17,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.089430894308943) internal successors, (257), 123 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:15:17,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 257 transitions. [2021-03-10 22:15:17,500 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 257 transitions. Word has length 20 [2021-03-10 22:15:17,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:15:17,500 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 257 transitions. [2021-03-10 22:15:17,500 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:15:17,500 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 257 transitions. [2021-03-10 22:15:17,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:15:17,500 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:15:17,500 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:15:17,700 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26393,529 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:15:17,701 INFO L428 AbstractCegarLoop]: === Iteration 535 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:15:17,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:15:17,701 INFO L82 PathProgramCache]: Analyzing trace with hash -1344065599, now seen corresponding path program 529 times [2021-03-10 22:15:17,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:15:17,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085159425] [2021-03-10 22:15:17,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:15:17,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:15:18,075 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:15:18,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085159425] [2021-03-10 22:15:18,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798743131] [2021-03-10 22:15:18,076 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 530 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 530 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:15:18,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:15:18,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 22:15:18,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:15:18,454 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2021-03-10 22:15:19,456 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:15:19,457 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:19,463 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:15:19,464 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:19,469 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:15:19,471 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:19,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:19,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:19,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:15:19,479 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:19,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:19,485 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:19,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:15:19,487 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:19,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:19,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:19,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-03-10 22:15:19,495 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:19,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:19,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:19,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-03-10 22:15:19,504 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:19,509 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:15:19,510 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:19,515 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:15:19,516 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:19,521 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:15:19,523 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:19,528 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:15:19,529 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:19,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:19,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:19,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-03-10 22:15:19,536 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:19,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:19,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:19,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:15:19,544 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:19,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:19,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:19,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:15:19,551 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:19,556 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:15:19,557 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:19,669 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2021-03-10 22:15:19,670 INFO L628 ElimStorePlain]: treesize reduction 14, result has 86.5 percent of original size [2021-03-10 22:15:19,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:15:19,676 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:19,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:15:19,681 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:19,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:15:19,686 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:19,737 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:15:19,738 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:15:19,739 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 4 variables, input treesize:660, output treesize:62 [2021-03-10 22:15:19,928 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:15:19,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:15:19,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-03-10 22:15:19,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479497550] [2021-03-10 22:15:19,928 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:15:19,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:15:19,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:15:19,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:15:19,928 INFO L87 Difference]: Start difference. First operand 124 states and 257 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:15:20,591 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2021-03-10 22:15:20,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:15:20,712 INFO L93 Difference]: Finished difference Result 169 states and 338 transitions. [2021-03-10 22:15:20,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:15:20,713 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:15:20,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:15:20,713 INFO L225 Difference]: With dead ends: 169 [2021-03-10 22:15:20,713 INFO L226 Difference]: Without dead ends: 153 [2021-03-10 22:15:20,713 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 1110.5ms TimeCoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:15:20,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-03-10 22:15:20,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 126. [2021-03-10 22:15:20,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.088) internal successors, (261), 125 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:15:20,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 261 transitions. [2021-03-10 22:15:20,714 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 261 transitions. Word has length 20 [2021-03-10 22:15:20,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:15:20,714 INFO L480 AbstractCegarLoop]: Abstraction has 126 states and 261 transitions. [2021-03-10 22:15:20,714 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:15:20,714 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 261 transitions. [2021-03-10 22:15:20,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:15:20,715 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:15:20,715 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:15:20,921 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 530 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26577 [2021-03-10 22:15:20,921 INFO L428 AbstractCegarLoop]: === Iteration 536 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:15:20,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:15:20,921 INFO L82 PathProgramCache]: Analyzing trace with hash 977978629, now seen corresponding path program 530 times [2021-03-10 22:15:20,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:15:20,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567490389] [2021-03-10 22:15:20,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:15:20,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:15:21,142 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2021-03-10 22:15:21,302 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-03-10 22:15:21,568 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:15:21,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567490389] [2021-03-10 22:15:21,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751957137] [2021-03-10 22:15:21,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 531 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 531 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:15:21,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:15:21,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:15:21,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 22:15:21,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:15:21,947 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2021-03-10 22:15:22,955 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:15:22,956 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:22,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:22,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:22,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:15:22,964 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:22,970 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:15:22,971 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:22,976 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:15:22,977 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:22,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:22,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:22,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-03-10 22:15:22,985 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:22,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:22,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:22,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-03-10 22:15:22,994 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:22,998 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:15:22,999 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:23,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:23,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:23,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:15:23,006 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:23,011 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:15:23,012 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:23,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:23,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:23,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:15:23,019 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:23,024 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:15:23,025 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:23,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:23,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:15:23,031 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:23,141 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2021-03-10 22:15:23,142 INFO L628 ElimStorePlain]: treesize reduction 14, result has 86.5 percent of original size [2021-03-10 22:15:23,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:15:23,148 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:23,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:15:23,154 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:23,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:15:23,159 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:23,205 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:15:23,207 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:15:23,207 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:521, output treesize:62 [2021-03-10 22:15:23,397 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:15:23,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:15:23,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-03-10 22:15:23,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014129966] [2021-03-10 22:15:23,398 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:15:23,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:15:23,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:15:23,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:15:23,398 INFO L87 Difference]: Start difference. First operand 126 states and 261 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:15:23,554 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 45 [2021-03-10 22:15:23,864 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 66 [2021-03-10 22:15:24,644 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 59 [2021-03-10 22:15:24,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:15:24,862 INFO L93 Difference]: Finished difference Result 180 states and 365 transitions. [2021-03-10 22:15:24,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 22:15:24,863 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:15:24,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:15:24,863 INFO L225 Difference]: With dead ends: 180 [2021-03-10 22:15:24,863 INFO L226 Difference]: Without dead ends: 167 [2021-03-10 22:15:24,864 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 2120.8ms TimeCoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2021-03-10 22:15:24,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-03-10 22:15:24,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 127. [2021-03-10 22:15:24,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 2.0873015873015874) internal successors, (263), 126 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:15:24,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 263 transitions. [2021-03-10 22:15:24,865 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 263 transitions. Word has length 20 [2021-03-10 22:15:24,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:15:24,865 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 263 transitions. [2021-03-10 22:15:24,865 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:15:24,865 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 263 transitions. [2021-03-10 22:15:24,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:15:24,865 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:15:24,865 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:15:25,067 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 531 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26703 [2021-03-10 22:15:25,067 INFO L428 AbstractCegarLoop]: === Iteration 537 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:15:25,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:15:25,067 INFO L82 PathProgramCache]: Analyzing trace with hash 498693953, now seen corresponding path program 531 times [2021-03-10 22:15:25,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:15:25,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228955508] [2021-03-10 22:15:25,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:15:25,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:15:25,419 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:15:25,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228955508] [2021-03-10 22:15:25,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144008015] [2021-03-10 22:15:25,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 532 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 532 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:15:25,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 22:15:25,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:15:25,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 22:15:25,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:15:25,785 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2021-03-10 22:15:25,957 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 68 [2021-03-10 22:15:27,052 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:15:27,054 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:27,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:27,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:27,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:15:27,063 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:27,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:27,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:27,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:15:27,073 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:27,078 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:15:27,080 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:27,086 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:15:27,087 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:27,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:27,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:27,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:15:27,096 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:27,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:27,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:27,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:15:27,105 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:27,111 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:15:27,112 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:27,118 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:15:27,119 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:27,126 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:27,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:27,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:15:27,128 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:27,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:27,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:27,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-03-10 22:15:27,138 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:27,144 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:15:27,145 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:27,151 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:27,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:27,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:15:27,154 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:27,160 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:15:27,161 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:27,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:27,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:27,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-03-10 22:15:27,171 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:27,176 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:15:27,178 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:27,183 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:15:27,185 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:27,190 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:15:27,191 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:27,197 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:27,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:27,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-03-10 22:15:27,200 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:27,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:27,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:15:27,207 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:27,449 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 73 [2021-03-10 22:15:27,450 INFO L628 ElimStorePlain]: treesize reduction 24, result has 87.9 percent of original size [2021-03-10 22:15:27,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:15:27,456 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:27,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:15:27,463 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:27,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:15:27,469 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:27,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:15:27,476 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:27,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:15:27,482 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:27,583 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2021-03-10 22:15:27,584 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:15:27,586 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 22:15:27,586 INFO L247 ElimStorePlain]: Needed 26 recursive calls to eliminate 5 variables, input treesize:985, output treesize:113 [2021-03-10 22:15:27,739 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2021-03-10 22:15:27,945 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:15:27,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:15:27,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-03-10 22:15:27,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654412231] [2021-03-10 22:15:27,946 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:15:27,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:15:27,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:15:27,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:15:27,946 INFO L87 Difference]: Start difference. First operand 127 states and 263 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:15:28,124 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 46 [2021-03-10 22:15:28,467 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2021-03-10 22:15:28,969 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2021-03-10 22:15:29,157 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 47 [2021-03-10 22:15:29,388 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2021-03-10 22:15:29,547 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2021-03-10 22:15:29,753 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2021-03-10 22:15:29,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:15:29,878 INFO L93 Difference]: Finished difference Result 237 states and 464 transitions. [2021-03-10 22:15:29,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 22:15:29,879 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:15:29,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:15:29,880 INFO L225 Difference]: With dead ends: 237 [2021-03-10 22:15:29,880 INFO L226 Difference]: Without dead ends: 204 [2021-03-10 22:15:29,880 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 2285.0ms TimeCoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2021-03-10 22:15:29,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-03-10 22:15:29,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 128. [2021-03-10 22:15:29,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.0866141732283463) internal successors, (265), 127 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:15:29,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 265 transitions. [2021-03-10 22:15:29,881 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 265 transitions. Word has length 20 [2021-03-10 22:15:29,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:15:29,881 INFO L480 AbstractCegarLoop]: Abstraction has 128 states and 265 transitions. [2021-03-10 22:15:29,881 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:15:29,881 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 265 transitions. [2021-03-10 22:15:29,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:15:29,881 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:15:29,881 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:15:30,082 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 532 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26900 [2021-03-10 22:15:30,082 INFO L428 AbstractCegarLoop]: === Iteration 538 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:15:30,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:15:30,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1565723951, now seen corresponding path program 532 times [2021-03-10 22:15:30,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:15:30,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828501569] [2021-03-10 22:15:30,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:15:30,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:15:30,396 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:15:30,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828501569] [2021-03-10 22:15:30,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117887024] [2021-03-10 22:15:30,397 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 533 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 533 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:15:30,517 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:15:30,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:15:30,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 22:15:30,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:15:30,731 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2021-03-10 22:15:30,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:15:30,897 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:30,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:15:30,902 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:30,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:15:30,907 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:30,952 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:15:30,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:15:30,957 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:30,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:15:30,962 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:30,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:15:30,967 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:31,007 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:15:31,008 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:15:31,008 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:92, output treesize:56 [2021-03-10 22:15:31,150 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:15:31,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:15:31,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-03-10 22:15:31,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539027225] [2021-03-10 22:15:31,151 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:15:31,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:15:31,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:15:31,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:15:31,151 INFO L87 Difference]: Start difference. First operand 128 states and 265 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:15:31,265 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2021-03-10 22:15:31,669 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2021-03-10 22:15:31,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:15:31,734 INFO L93 Difference]: Finished difference Result 170 states and 341 transitions. [2021-03-10 22:15:31,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:15:31,735 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:15:31,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:15:31,735 INFO L225 Difference]: With dead ends: 170 [2021-03-10 22:15:31,735 INFO L226 Difference]: Without dead ends: 157 [2021-03-10 22:15:31,735 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 848.1ms TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:15:31,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-03-10 22:15:31,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 130. [2021-03-10 22:15:31,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 2.0852713178294575) internal successors, (269), 129 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:15:31,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 269 transitions. [2021-03-10 22:15:31,736 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 269 transitions. Word has length 20 [2021-03-10 22:15:31,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:15:31,736 INFO L480 AbstractCegarLoop]: Abstraction has 130 states and 269 transitions. [2021-03-10 22:15:31,736 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:15:31,736 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 269 transitions. [2021-03-10 22:15:31,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:15:31,737 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:15:31,737 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:15:31,937 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27033,533 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:15:31,937 INFO L428 AbstractCegarLoop]: === Iteration 539 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:15:31,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:15:31,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1086439275, now seen corresponding path program 533 times [2021-03-10 22:15:31,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:15:31,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641292246] [2021-03-10 22:15:31,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:15:31,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:15:32,274 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:15:32,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641292246] [2021-03-10 22:15:32,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866044738] [2021-03-10 22:15:32,275 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 534 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 534 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:15:32,396 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 22:15:32,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:15:32,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 22:15:32,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:15:32,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:15:32,659 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:32,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:15:32,665 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:32,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:15:32,670 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:32,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:15:32,683 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:32,762 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:15:32,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:15:32,768 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:32,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:15:32,774 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:32,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:15:32,779 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:32,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:15:32,784 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:32,852 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:15:32,854 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:15:32,854 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:135, output treesize:79 [2021-03-10 22:15:33,085 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:15:33,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:15:33,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-03-10 22:15:33,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839940118] [2021-03-10 22:15:33,086 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:15:33,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:15:33,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:15:33,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:15:33,086 INFO L87 Difference]: Start difference. First operand 130 states and 269 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:15:33,919 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 36 [2021-03-10 22:15:34,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:15:34,064 INFO L93 Difference]: Finished difference Result 172 states and 349 transitions. [2021-03-10 22:15:34,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:15:34,065 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:15:34,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:15:34,065 INFO L225 Difference]: With dead ends: 172 [2021-03-10 22:15:34,065 INFO L226 Difference]: Without dead ends: 160 [2021-03-10 22:15:34,066 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 1131.6ms TimeCoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:15:34,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-03-10 22:15:34,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 131. [2021-03-10 22:15:34,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 2.0846153846153848) internal successors, (271), 130 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) [2021-03-10 22:15:34,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 271 transitions. [2021-03-10 22:15:34,067 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 271 transitions. Word has length 20 [2021-03-10 22:15:34,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:15:34,067 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 271 transitions. [2021-03-10 22:15:34,067 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:15:34,067 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 271 transitions. [2021-03-10 22:15:34,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:15:34,067 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:15:34,067 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:15:34,267 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27066,534 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:15:34,268 INFO L428 AbstractCegarLoop]: === Iteration 540 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:15:34,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:15:34,268 INFO L82 PathProgramCache]: Analyzing trace with hash 551209473, now seen corresponding path program 534 times [2021-03-10 22:15:34,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:15:34,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729228710] [2021-03-10 22:15:34,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:15:34,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:15:34,588 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:15:34,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729228710] [2021-03-10 22:15:34,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297590120] [2021-03-10 22:15:34,588 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 535 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 535 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:15:34,710 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 22:15:34,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:15:34,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 22:15:34,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:15:35,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:15:35,031 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:35,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:15:35,037 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:35,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:15:35,043 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:35,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:15:35,049 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:35,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:15:35,056 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:35,150 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:15:35,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:15:35,157 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:35,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:15:35,162 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:35,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:15:35,168 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:35,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:15:35,173 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:35,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:15:35,179 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:35,261 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:15:35,263 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 22:15:35,263 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 3 variables, input treesize:168, output treesize:100 [2021-03-10 22:15:35,404 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2021-03-10 22:15:35,547 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:15:35,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:15:35,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-03-10 22:15:35,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908019621] [2021-03-10 22:15:35,548 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:15:35,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:15:35,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:15:35,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:15:35,548 INFO L87 Difference]: Start difference. First operand 131 states and 271 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:15:35,980 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2021-03-10 22:15:36,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:15:36,152 INFO L93 Difference]: Finished difference Result 189 states and 380 transitions. [2021-03-10 22:15:36,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:15:36,154 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:15:36,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:15:36,154 INFO L225 Difference]: With dead ends: 189 [2021-03-10 22:15:36,154 INFO L226 Difference]: Without dead ends: 170 [2021-03-10 22:15:36,154 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 978.6ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:15:36,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-03-10 22:15:36,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 133. [2021-03-10 22:15:36,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.090909090909091) internal successors, (276), 132 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:15:36,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 276 transitions. [2021-03-10 22:15:36,156 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 276 transitions. Word has length 20 [2021-03-10 22:15:36,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:15:36,156 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 276 transitions. [2021-03-10 22:15:36,156 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:15:36,156 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 276 transitions. [2021-03-10 22:15:36,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:15:36,156 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:15:36,156 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:15:36,356 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 535 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27100 [2021-03-10 22:15:36,356 INFO L428 AbstractCegarLoop]: === Iteration 541 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:15:36,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:15:36,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1401064339, now seen corresponding path program 535 times [2021-03-10 22:15:36,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:15:36,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728281364] [2021-03-10 22:15:36,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:15:36,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:15:36,710 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:15:36,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728281364] [2021-03-10 22:15:36,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696524436] [2021-03-10 22:15:36,710 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 536 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 536 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:15:36,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:15:36,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 22:15:36,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:15:37,044 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2021-03-10 22:15:38,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:38,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:38,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:15:38,079 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:38,082 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:15:38,084 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:38,087 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:15:38,089 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:38,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:38,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:38,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:15:38,095 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:38,099 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:15:38,100 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:38,202 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 35 [2021-03-10 22:15:38,203 INFO L628 ElimStorePlain]: treesize reduction 158, result has 27.5 percent of original size [2021-03-10 22:15:38,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:15:38,207 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:38,244 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:15:38,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:15:38,249 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:38,284 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:15:38,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:15:38,288 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:38,322 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:15:38,323 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:15:38,323 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 4 variables, input treesize:356, output treesize:46 [2021-03-10 22:15:38,460 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:15:38,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:15:38,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-03-10 22:15:38,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600136162] [2021-03-10 22:15:38,460 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 22:15:38,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:15:38,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 22:15:38,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:15:38,461 INFO L87 Difference]: Start difference. First operand 133 states and 276 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:15:39,098 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2021-03-10 22:15:39,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:15:39,434 INFO L93 Difference]: Finished difference Result 170 states and 346 transitions. [2021-03-10 22:15:39,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 22:15:39,435 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:15:39,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:15:39,435 INFO L225 Difference]: With dead ends: 170 [2021-03-10 22:15:39,435 INFO L226 Difference]: Without dead ends: 148 [2021-03-10 22:15:39,435 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1327.2ms TimeCoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:15:39,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-03-10 22:15:39,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 135. [2021-03-10 22:15:39,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.08955223880597) internal successors, (280), 134 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:15:39,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 280 transitions. [2021-03-10 22:15:39,436 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 280 transitions. Word has length 20 [2021-03-10 22:15:39,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:15:39,436 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 280 transitions. [2021-03-10 22:15:39,437 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:15:39,437 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 280 transitions. [2021-03-10 22:15:39,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:15:39,437 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:15:39,437 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:15:39,637 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27136,536 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:15:39,637 INFO L428 AbstractCegarLoop]: === Iteration 542 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:15:39,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:15:39,637 INFO L82 PathProgramCache]: Analyzing trace with hash -497426473, now seen corresponding path program 536 times [2021-03-10 22:15:39,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:15:39,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192207622] [2021-03-10 22:15:39,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:15:39,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:15:40,028 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:15:40,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192207622] [2021-03-10 22:15:40,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938999611] [2021-03-10 22:15:40,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 537 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 537 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:15:40,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:15:40,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:15:40,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 22:15:40,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:15:41,020 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:15:41,021 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:41,025 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:15:41,026 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:41,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:41,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:41,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:15:41,033 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:41,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:41,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-03-10 22:15:41,039 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:41,140 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 35 [2021-03-10 22:15:41,141 INFO L628 ElimStorePlain]: treesize reduction 119, result has 34.6 percent of original size [2021-03-10 22:15:41,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:15:41,149 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:41,192 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:15:41,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:15:41,196 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:41,232 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:15:41,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:15:41,236 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:41,269 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:15:41,270 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:15:41,270 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 4 variables, input treesize:284, output treesize:46 [2021-03-10 22:15:41,409 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:15:41,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:15:41,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-03-10 22:15:41,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121370544] [2021-03-10 22:15:41,409 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 22:15:41,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:15:41,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 22:15:41,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:15:41,409 INFO L87 Difference]: Start difference. First operand 135 states and 280 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:15:41,554 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 33 [2021-03-10 22:15:42,244 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 53 [2021-03-10 22:15:42,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:15:42,362 INFO L93 Difference]: Finished difference Result 167 states and 334 transitions. [2021-03-10 22:15:42,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:15:42,363 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:15:42,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:15:42,363 INFO L225 Difference]: With dead ends: 167 [2021-03-10 22:15:42,363 INFO L226 Difference]: Without dead ends: 148 [2021-03-10 22:15:42,363 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1347.6ms TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:15:42,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-03-10 22:15:42,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 136. [2021-03-10 22:15:42,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.088888888888889) internal successors, (282), 135 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:15:42,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 282 transitions. [2021-03-10 22:15:42,365 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 282 transitions. Word has length 20 [2021-03-10 22:15:42,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:15:42,365 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 282 transitions. [2021-03-10 22:15:42,365 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:15:42,365 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 282 transitions. [2021-03-10 22:15:42,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:15:42,365 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:15:42,365 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:15:42,565 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27274,537 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:15:42,565 INFO L428 AbstractCegarLoop]: === Iteration 543 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:15:42,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:15:42,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1528499437, now seen corresponding path program 537 times [2021-03-10 22:15:42,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:15:42,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577840349] [2021-03-10 22:15:42,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:15:42,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:15:42,957 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:15:42,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577840349] [2021-03-10 22:15:42,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402668288] [2021-03-10 22:15:42,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 538 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 538 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:15:43,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:15:43,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:15:43,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 22:15:43,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:15:43,299 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2021-03-10 22:15:44,300 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:15:44,301 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:44,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:44,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:44,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-03-10 22:15:44,308 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:44,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:44,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:44,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:15:44,315 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:44,318 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:15:44,319 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:44,420 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 34 [2021-03-10 22:15:44,420 INFO L628 ElimStorePlain]: treesize reduction 121, result has 33.5 percent of original size [2021-03-10 22:15:44,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:15:44,425 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:44,463 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:15:44,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:15:44,467 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:44,503 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:15:44,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:15:44,507 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:44,540 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:15:44,541 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:15:44,542 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 4 variables, input treesize:284, output treesize:46 [2021-03-10 22:15:44,681 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:15:44,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:15:44,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-03-10 22:15:44,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233976096] [2021-03-10 22:15:44,681 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 22:15:44,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:15:44,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 22:15:44,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:15:44,681 INFO L87 Difference]: Start difference. First operand 136 states and 282 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:15:44,860 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 45 [2021-03-10 22:15:45,104 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 36 [2021-03-10 22:15:45,743 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2021-03-10 22:15:45,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:15:45,839 INFO L93 Difference]: Finished difference Result 169 states and 339 transitions. [2021-03-10 22:15:45,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:15:45,840 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:15:45,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:15:45,840 INFO L225 Difference]: With dead ends: 169 [2021-03-10 22:15:45,840 INFO L226 Difference]: Without dead ends: 153 [2021-03-10 22:15:45,840 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1636.1ms TimeCoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:15:45,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-03-10 22:15:45,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 137. [2021-03-10 22:15:45,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.088235294117647) internal successors, (284), 136 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:15:45,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 284 transitions. [2021-03-10 22:15:45,841 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 284 transitions. Word has length 20 [2021-03-10 22:15:45,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:15:45,842 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 284 transitions. [2021-03-10 22:15:45,842 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:15:45,842 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 284 transitions. [2021-03-10 22:15:45,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:15:45,842 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:15:45,842 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:15:46,042 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 538 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27361 [2021-03-10 22:15:46,042 INFO L428 AbstractCegarLoop]: === Iteration 544 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:15:46,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:15:46,043 INFO L82 PathProgramCache]: Analyzing trace with hash 793544791, now seen corresponding path program 538 times [2021-03-10 22:15:46,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:15:46,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799820658] [2021-03-10 22:15:46,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:15:46,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:15:46,452 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:15:46,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799820658] [2021-03-10 22:15:46,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989780962] [2021-03-10 22:15:46,452 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 539 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 539 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:15:46,573 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:15:46,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:15:46,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 22:15:46,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:15:47,660 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:47,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:47,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-03-10 22:15:47,663 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:47,667 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:15:47,668 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:47,672 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:15:47,673 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:47,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:47,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:15:47,679 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:47,779 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2021-03-10 22:15:47,780 INFO L628 ElimStorePlain]: treesize reduction 107, result has 36.3 percent of original size [2021-03-10 22:15:47,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:15:47,785 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:47,822 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:15:47,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:15:47,827 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:47,862 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:15:47,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:15:47,866 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:47,899 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:15:47,900 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:15:47,900 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 4 variables, input treesize:284, output treesize:46 [2021-03-10 22:15:48,039 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:15:48,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:15:48,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-03-10 22:15:48,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497404172] [2021-03-10 22:15:48,039 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 22:15:48,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:15:48,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 22:15:48,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:15:48,039 INFO L87 Difference]: Start difference. First operand 137 states and 284 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:15:48,278 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 50 [2021-03-10 22:15:48,545 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 42 [2021-03-10 22:15:48,695 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 34 [2021-03-10 22:15:49,314 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 53 [2021-03-10 22:15:49,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:15:49,372 INFO L93 Difference]: Finished difference Result 170 states and 342 transitions. [2021-03-10 22:15:49,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:15:49,373 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:15:49,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:15:49,373 INFO L225 Difference]: With dead ends: 170 [2021-03-10 22:15:49,373 INFO L226 Difference]: Without dead ends: 157 [2021-03-10 22:15:49,373 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1854.4ms TimeCoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:15:49,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-03-10 22:15:49,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 138. [2021-03-10 22:15:49,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.0875912408759123) internal successors, (286), 137 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:15:49,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 286 transitions. [2021-03-10 22:15:49,375 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 286 transitions. Word has length 20 [2021-03-10 22:15:49,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:15:49,375 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 286 transitions. [2021-03-10 22:15:49,375 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:15:49,375 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 286 transitions. [2021-03-10 22:15:49,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:15:49,375 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:15:49,375 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:15:49,575 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27530,539 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:15:49,575 INFO L428 AbstractCegarLoop]: === Iteration 545 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:15:49,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:15:49,575 INFO L82 PathProgramCache]: Analyzing trace with hash 314260115, now seen corresponding path program 539 times [2021-03-10 22:15:49,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:15:49,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645188272] [2021-03-10 22:15:49,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:15:49,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:15:49,963 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:15:49,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645188272] [2021-03-10 22:15:49,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798104640] [2021-03-10 22:15:49,963 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 540 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 540 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:15:50,088 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 22:15:50,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:15:50,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 22:15:50,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:15:50,315 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2021-03-10 22:15:51,736 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:15:51,737 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:51,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:51,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:51,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:15:51,747 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:51,752 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:15:51,753 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:51,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:51,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:51,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:15:51,762 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:51,767 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:15:51,769 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:52,022 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 67 [2021-03-10 22:15:52,023 INFO L628 ElimStorePlain]: treesize reduction 490, result has 19.3 percent of original size [2021-03-10 22:15:52,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:15:52,029 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:52,108 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:15:52,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:15:52,114 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:52,191 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:15:52,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:15:52,197 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:52,272 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:15:52,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:15:52,278 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:52,351 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:15:52,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:15:52,356 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:52,425 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:15:52,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:15:52,431 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:52,498 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:15:52,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:15:52,503 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:52,568 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:15:52,569 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:15:52,569 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 10 variables, input treesize:769, output treesize:73 [2021-03-10 22:15:52,819 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:15:52,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:15:52,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-03-10 22:15:52,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400364198] [2021-03-10 22:15:52,819 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 22:15:52,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:15:52,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 22:15:52,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:15:52,820 INFO L87 Difference]: Start difference. First operand 138 states and 286 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:15:53,694 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 28 [2021-03-10 22:15:53,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:15:53,853 INFO L93 Difference]: Finished difference Result 160 states and 326 transitions. [2021-03-10 22:15:53,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:15:53,854 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:15:53,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:15:53,854 INFO L225 Difference]: With dead ends: 160 [2021-03-10 22:15:53,854 INFO L226 Difference]: Without dead ends: 148 [2021-03-10 22:15:53,854 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 1500.1ms TimeCoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:15:53,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-03-10 22:15:53,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 137. [2021-03-10 22:15:53,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.088235294117647) internal successors, (284), 136 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:15:53,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 284 transitions. [2021-03-10 22:15:53,856 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 284 transitions. Word has length 20 [2021-03-10 22:15:53,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:15:53,856 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 284 transitions. [2021-03-10 22:15:53,856 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:15:53,856 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 284 transitions. [2021-03-10 22:15:53,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:15:53,856 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:15:53,856 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:15:54,056 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27675,540 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:15:54,056 INFO L428 AbstractCegarLoop]: === Iteration 546 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:15:54,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:15:54,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1685112193, now seen corresponding path program 540 times [2021-03-10 22:15:54,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:15:54,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172079171] [2021-03-10 22:15:54,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:15:54,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:15:54,420 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:15:54,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172079171] [2021-03-10 22:15:54,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128536102] [2021-03-10 22:15:54,421 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 541 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 541 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:15:54,543 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:15:54,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:15:54,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 22:15:54,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:15:55,926 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:15:55,928 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:55,933 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:15:55,935 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:55,940 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:15:55,942 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:55,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:55,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:55,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:15:55,950 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:55,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:55,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:55,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:15:55,959 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:55,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:55,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:55,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-03-10 22:15:55,968 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:55,974 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:15:55,975 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:55,980 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:15:55,981 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:55,987 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:15:55,988 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:55,994 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:55,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:55,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:15:55,997 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:56,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:56,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:56,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-03-10 22:15:56,005 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:56,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:56,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:56,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-03-10 22:15:56,014 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:56,019 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:15:56,020 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:56,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:56,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:56,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:15:56,028 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:56,033 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:15:56,035 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:56,137 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2021-03-10 22:15:56,138 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-03-10 22:15:56,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:15:56,143 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:56,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:15:56,149 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:56,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:15:56,154 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:56,195 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:15:56,196 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:15:56,196 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 4 variables, input treesize:597, output treesize:52 [2021-03-10 22:15:56,350 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:15:56,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:15:56,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-03-10 22:15:56,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003710667] [2021-03-10 22:15:56,350 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 22:15:56,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:15:56,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 22:15:56,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:15:56,351 INFO L87 Difference]: Start difference. First operand 137 states and 284 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:15:56,973 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2021-03-10 22:15:57,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:15:57,067 INFO L93 Difference]: Finished difference Result 165 states and 330 transitions. [2021-03-10 22:15:57,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:15:57,068 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:15:57,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:15:57,068 INFO L225 Difference]: With dead ends: 165 [2021-03-10 22:15:57,068 INFO L226 Difference]: Without dead ends: 146 [2021-03-10 22:15:57,068 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1198.8ms TimeCoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:15:57,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-03-10 22:15:57,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 139. [2021-03-10 22:15:57,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.0869565217391304) internal successors, (288), 138 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:15:57,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 288 transitions. [2021-03-10 22:15:57,070 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 288 transitions. Word has length 20 [2021-03-10 22:15:57,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:15:57,070 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 288 transitions. [2021-03-10 22:15:57,070 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:15:57,070 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 288 transitions. [2021-03-10 22:15:57,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:15:57,070 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:15:57,070 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:15:57,270 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 541 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27825 [2021-03-10 22:15:57,270 INFO L428 AbstractCegarLoop]: === Iteration 547 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:15:57,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:15:57,270 INFO L82 PathProgramCache]: Analyzing trace with hash 654039229, now seen corresponding path program 541 times [2021-03-10 22:15:57,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:15:57,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278266408] [2021-03-10 22:15:57,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:15:57,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:15:57,644 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:15:57,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278266408] [2021-03-10 22:15:57,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988706978] [2021-03-10 22:15:57,645 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 542 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 542 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:15:57,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:15:57,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 22:15:57,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:15:59,030 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:15:59,032 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:59,037 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:15:59,039 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:59,044 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:15:59,045 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:59,050 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:15:59,052 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:59,057 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:59,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:59,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-03-10 22:15:59,060 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:59,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:59,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:59,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:15:59,069 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:59,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:59,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:59,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:15:59,077 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:59,082 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:15:59,083 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:59,088 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:15:59,089 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:59,094 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:15:59,095 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:59,100 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:15:59,101 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:59,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:59,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:59,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-03-10 22:15:59,109 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:59,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:59,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:59,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:15:59,116 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:59,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:59,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:59,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:15:59,124 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:59,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:15:59,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-03-10 22:15:59,130 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:59,230 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-03-10 22:15:59,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:15:59,236 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:59,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:15:59,241 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:59,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:15:59,247 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:15:59,287 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:15:59,288 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:15:59,288 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 4 variables, input treesize:591, output treesize:52 [2021-03-10 22:15:59,436 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:15:59,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:15:59,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-03-10 22:15:59,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108688996] [2021-03-10 22:15:59,436 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 22:15:59,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:15:59,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 22:15:59,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:15:59,437 INFO L87 Difference]: Start difference. First operand 139 states and 288 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:16:00,308 WARN L205 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2021-03-10 22:16:00,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:16:00,610 INFO L93 Difference]: Finished difference Result 167 states and 340 transitions. [2021-03-10 22:16:00,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 22:16:00,611 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:16:00,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:16:00,611 INFO L225 Difference]: With dead ends: 167 [2021-03-10 22:16:00,611 INFO L226 Difference]: Without dead ends: 151 [2021-03-10 22:16:00,611 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1418.9ms TimeCoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:16:00,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-03-10 22:16:00,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 140. [2021-03-10 22:16:00,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 2.0863309352517985) internal successors, (290), 139 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:16:00,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 290 transitions. [2021-03-10 22:16:00,612 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 290 transitions. Word has length 20 [2021-03-10 22:16:00,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:16:00,612 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 290 transitions. [2021-03-10 22:16:00,612 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:16:00,612 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 290 transitions. [2021-03-10 22:16:00,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:16:00,613 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:16:00,613 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:16:00,813 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27947,542 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:16:00,813 INFO L428 AbstractCegarLoop]: === Iteration 548 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:16:00,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:16:00,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1318883839, now seen corresponding path program 542 times [2021-03-10 22:16:00,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:16:00,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172298721] [2021-03-10 22:16:00,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:16:00,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:16:01,203 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:16:01,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172298721] [2021-03-10 22:16:01,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614521503] [2021-03-10 22:16:01,203 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 543 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 543 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:16:01,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:16:01,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:16:01,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 22:16:01,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:16:01,584 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2021-03-10 22:16:02,751 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:16:02,752 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:02,757 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:16:02,759 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:02,764 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:16:02,765 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:02,770 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:16:02,772 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:02,777 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:16:02,778 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:02,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:02,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:02,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:16:02,787 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:02,793 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:16:02,794 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:02,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:02,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:02,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-03-10 22:16:02,803 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:02,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:02,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:02,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-03-10 22:16:02,811 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:02,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:02,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:02,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:16:02,820 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:02,825 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:16:02,826 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:02,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:02,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:02,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:16:02,834 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:02,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:02,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:02,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-03-10 22:16:02,842 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:02,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:02,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:02,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:16:02,850 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:02,854 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:16:02,856 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:02,965 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2021-03-10 22:16:02,965 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-03-10 22:16:02,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:16:02,971 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:02,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:16:02,976 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:02,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:16:02,982 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:03,023 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:16:03,025 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:16:03,025 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 4 variables, input treesize:591, output treesize:52 [2021-03-10 22:16:03,177 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:16:03,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:16:03,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-03-10 22:16:03,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301448250] [2021-03-10 22:16:03,177 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 22:16:03,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:16:03,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 22:16:03,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:16:03,178 INFO L87 Difference]: Start difference. First operand 140 states and 290 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:16:03,970 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2021-03-10 22:16:04,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:16:04,154 INFO L93 Difference]: Finished difference Result 164 states and 334 transitions. [2021-03-10 22:16:04,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:16:04,155 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:16:04,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:16:04,155 INFO L225 Difference]: With dead ends: 164 [2021-03-10 22:16:04,155 INFO L226 Difference]: Without dead ends: 151 [2021-03-10 22:16:04,155 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 1439.7ms TimeCoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:16:04,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-03-10 22:16:04,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 141. [2021-03-10 22:16:04,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.085714285714286) internal successors, (292), 140 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:16:04,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 292 transitions. [2021-03-10 22:16:04,156 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 292 transitions. Word has length 20 [2021-03-10 22:16:04,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:16:04,156 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 292 transitions. [2021-03-10 22:16:04,156 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:16:04,157 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 292 transitions. [2021-03-10 22:16:04,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:16:04,157 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:16:04,157 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:16:04,357 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 543 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28096 [2021-03-10 22:16:04,357 INFO L428 AbstractCegarLoop]: === Iteration 549 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:16:04,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:16:04,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1798168515, now seen corresponding path program 543 times [2021-03-10 22:16:04,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:16:04,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861694441] [2021-03-10 22:16:04,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:16:04,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:16:04,717 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:16:04,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861694441] [2021-03-10 22:16:04,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242003376] [2021-03-10 22:16:04,717 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 544 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 544 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:16:04,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:16:04,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:16:04,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 22:16:04,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:16:07,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:07,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:07,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:16:07,162 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:07,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:07,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:07,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:16:07,172 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:07,178 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:16:07,179 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:07,185 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:16:07,187 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:07,193 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:16:07,194 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:07,201 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:16:07,202 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:07,207 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:16:07,209 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:07,214 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:07,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:07,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:16:07,218 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:07,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:07,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:07,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:16:07,227 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:07,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:07,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:07,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-03-10 22:16:07,236 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:07,242 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:07,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:07,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-03-10 22:16:07,246 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:07,252 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:16:07,253 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:07,259 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:16:07,261 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:07,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:07,268 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:07,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-03-10 22:16:07,270 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:07,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:07,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:07,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:16:07,280 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:07,285 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:16:07,287 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:07,292 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:16:07,294 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:07,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:07,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:07,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:16:07,302 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:07,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:07,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:07,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:16:07,311 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:07,316 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:16:07,317 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:07,552 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 69 [2021-03-10 22:16:07,552 INFO L628 ElimStorePlain]: treesize reduction 24, result has 86.6 percent of original size [2021-03-10 22:16:07,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:16:07,559 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:07,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:16:07,566 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:07,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:16:07,572 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:07,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:16:07,578 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:07,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:16:07,585 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:07,679 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:16:07,681 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 22:16:07,681 INFO L247 ElimStorePlain]: Needed 26 recursive calls to eliminate 5 variables, input treesize:905, output treesize:104 [2021-03-10 22:16:07,838 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-03-10 22:16:08,005 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:16:08,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:16:08,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-03-10 22:16:08,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458238785] [2021-03-10 22:16:08,006 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 22:16:08,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:16:08,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 22:16:08,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:16:08,006 INFO L87 Difference]: Start difference. First operand 141 states and 292 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:16:08,776 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2021-03-10 22:16:08,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:16:08,920 INFO L93 Difference]: Finished difference Result 163 states and 332 transitions. [2021-03-10 22:16:08,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:16:08,921 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:16:08,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:16:08,921 INFO L225 Difference]: With dead ends: 163 [2021-03-10 22:16:08,921 INFO L226 Difference]: Without dead ends: 151 [2021-03-10 22:16:08,922 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 1410.9ms TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:16:08,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-03-10 22:16:08,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 138. [2021-03-10 22:16:08,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.0875912408759123) internal successors, (286), 137 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:16:08,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 286 transitions. [2021-03-10 22:16:08,923 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 286 transitions. Word has length 20 [2021-03-10 22:16:08,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:16:08,923 INFO L480 AbstractCegarLoop]: Abstraction has 138 states and 286 transitions. [2021-03-10 22:16:08,923 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:16:08,923 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 286 transitions. [2021-03-10 22:16:08,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:16:08,923 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:16:08,923 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:16:09,123 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28279,544 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:16:09,123 INFO L428 AbstractCegarLoop]: === Iteration 550 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:16:09,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:16:09,124 INFO L82 PathProgramCache]: Analyzing trace with hash 1694275027, now seen corresponding path program 544 times [2021-03-10 22:16:09,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:16:09,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958532298] [2021-03-10 22:16:09,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:16:09,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:16:09,532 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:16:09,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958532298] [2021-03-10 22:16:09,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965194280] [2021-03-10 22:16:09,532 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 545 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 545 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:16:09,653 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:16:09,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:16:09,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 22:16:09,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:16:10,729 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:16:10,731 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:10,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:10,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:10,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:16:10,739 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:10,745 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:16:10,746 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:10,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:10,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:10,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:16:10,754 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:10,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:10,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:10,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-03-10 22:16:10,763 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:10,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:10,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:10,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-03-10 22:16:10,772 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:10,778 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:16:10,779 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:10,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:10,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:10,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:16:10,788 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:10,793 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:16:10,794 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:10,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:10,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:10,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:16:10,802 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:10,807 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:16:10,809 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:10,813 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:16:10,814 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:10,928 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2021-03-10 22:16:10,929 INFO L628 ElimStorePlain]: treesize reduction 14, result has 86.5 percent of original size [2021-03-10 22:16:10,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:16:10,934 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:10,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:16:10,940 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:10,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:16:10,946 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:10,994 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:16:10,996 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:16:10,996 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:521, output treesize:62 [2021-03-10 22:16:11,201 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:16:11,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:16:11,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-03-10 22:16:11,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621698387] [2021-03-10 22:16:11,201 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:16:11,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:16:11,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:16:11,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:16:11,201 INFO L87 Difference]: Start difference. First operand 138 states and 286 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:16:11,889 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2021-03-10 22:16:11,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:16:11,979 INFO L93 Difference]: Finished difference Result 163 states and 327 transitions. [2021-03-10 22:16:11,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:16:11,980 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:16:11,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:16:11,980 INFO L225 Difference]: With dead ends: 163 [2021-03-10 22:16:11,980 INFO L226 Difference]: Without dead ends: 147 [2021-03-10 22:16:11,980 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1122.8ms TimeCoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:16:11,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-03-10 22:16:11,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 140. [2021-03-10 22:16:11,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 2.0863309352517985) internal successors, (290), 139 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:16:11,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 290 transitions. [2021-03-10 22:16:11,982 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 290 transitions. Word has length 20 [2021-03-10 22:16:11,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:16:11,982 INFO L480 AbstractCegarLoop]: Abstraction has 140 states and 290 transitions. [2021-03-10 22:16:11,982 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:16:11,982 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 290 transitions. [2021-03-10 22:16:11,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:16:11,982 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:16:11,982 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:16:12,182 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 545 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28605 [2021-03-10 22:16:12,182 INFO L428 AbstractCegarLoop]: === Iteration 551 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:16:12,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:16:12,182 INFO L82 PathProgramCache]: Analyzing trace with hash -278648041, now seen corresponding path program 545 times [2021-03-10 22:16:12,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:16:12,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151475811] [2021-03-10 22:16:12,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:16:12,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:16:12,552 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:16:12,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151475811] [2021-03-10 22:16:12,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011506497] [2021-03-10 22:16:12,552 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 546 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 546 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:16:12,675 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 22:16:12,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:16:12,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 22:16:12,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:16:13,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:13,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:13,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:16:13,648 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:13,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:13,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:13,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-03-10 22:16:13,658 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:13,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:13,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:13,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-03-10 22:16:13,667 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:13,673 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:16:13,674 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:13,679 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:16:13,681 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:13,687 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:16:13,688 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:13,694 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:16:13,695 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:13,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:13,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:13,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:16:13,704 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:13,709 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:16:13,711 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:13,716 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:16:13,717 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:13,722 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:16:13,724 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:13,729 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:16:13,730 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:13,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:13,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:13,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:16:13,738 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:13,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:13,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:13,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-03-10 22:16:13,746 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:13,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:13,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:16:13,753 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:13,868 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2021-03-10 22:16:13,869 INFO L628 ElimStorePlain]: treesize reduction 14, result has 86.5 percent of original size [2021-03-10 22:16:13,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:16:13,875 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:13,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:16:13,881 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:13,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:16:13,887 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:13,935 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:16:13,937 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:16:13,937 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 4 variables, input treesize:660, output treesize:62 [2021-03-10 22:16:14,142 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:16:14,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:16:14,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-03-10 22:16:14,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628646475] [2021-03-10 22:16:14,142 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:16:14,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:16:14,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:16:14,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:16:14,143 INFO L87 Difference]: Start difference. First operand 140 states and 290 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:16:14,287 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 34 [2021-03-10 22:16:15,001 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 60 [2021-03-10 22:16:15,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:16:15,074 INFO L93 Difference]: Finished difference Result 166 states and 334 transitions. [2021-03-10 22:16:15,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:16:15,075 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:16:15,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:16:15,075 INFO L225 Difference]: With dead ends: 166 [2021-03-10 22:16:15,075 INFO L226 Difference]: Without dead ends: 153 [2021-03-10 22:16:15,075 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1265.0ms TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:16:15,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-03-10 22:16:15,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 141. [2021-03-10 22:16:15,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.085714285714286) internal successors, (292), 140 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:16:15,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 292 transitions. [2021-03-10 22:16:15,076 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 292 transitions. Word has length 20 [2021-03-10 22:16:15,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:16:15,076 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 292 transitions. [2021-03-10 22:16:15,076 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:16:15,076 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 292 transitions. [2021-03-10 22:16:15,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:16:15,077 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:16:15,077 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:16:15,277 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28785,546 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:16:15,277 INFO L428 AbstractCegarLoop]: === Iteration 552 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:16:15,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:16:15,277 INFO L82 PathProgramCache]: Analyzing trace with hash -757932717, now seen corresponding path program 546 times [2021-03-10 22:16:15,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:16:15,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700930844] [2021-03-10 22:16:15,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:16:15,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:16:15,643 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:16:15,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700930844] [2021-03-10 22:16:15,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000606138] [2021-03-10 22:16:15,643 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 547 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 547 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:16:15,772 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 22:16:15,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:16:15,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 22:16:15,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:16:16,795 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:16,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:16,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:16:16,798 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:16,805 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:16:16,806 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:16,812 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:16:16,814 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:16,821 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:16:16,822 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:16,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:16,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:16,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:16:16,832 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:16,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:16,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:16,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-03-10 22:16:16,843 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:16,849 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:16:16,851 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:16,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:16,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:16,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:16:16,861 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:16,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:16,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:16,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-03-10 22:16:16,873 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:16,880 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:16:16,881 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:16,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:16,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:16,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-03-10 22:16:16,892 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:16,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:16,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:16,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:16:16,902 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:16,909 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:16:16,910 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:16,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:16,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:16,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-03-10 22:16:16,921 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:16,928 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:16:16,929 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:16,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:16,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:16,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:16:16,939 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:16,946 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:16:16,948 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:16,955 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:16:16,956 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:16,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:16,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:16,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:16:16,966 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:16,973 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:16:16,974 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:16,981 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:16:16,982 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:16,989 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:16:16,990 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:16,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:16,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:16,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:16:17,000 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:17,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:17,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:16:17,007 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:17,321 WARN L205 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 81 [2021-03-10 22:16:17,321 INFO L628 ElimStorePlain]: treesize reduction 28, result has 88.3 percent of original size [2021-03-10 22:16:17,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:16:17,329 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:17,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:16:17,336 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:17,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:16:17,343 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:17,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:16:17,351 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:17,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:16:17,357 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:17,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:16:17,364 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:17,492 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2021-03-10 22:16:17,492 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:16:17,495 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 6 xjuncts. [2021-03-10 22:16:17,495 INFO L247 ElimStorePlain]: Needed 31 recursive calls to eliminate 5 variables, input treesize:1193, output treesize:141 [2021-03-10 22:16:17,668 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2021-03-10 22:16:17,893 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:16:17,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:16:17,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-03-10 22:16:17,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51275745] [2021-03-10 22:16:17,893 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:16:17,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:16:17,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:16:17,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:16:17,893 INFO L87 Difference]: Start difference. First operand 141 states and 292 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:16:18,072 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 43 [2021-03-10 22:16:18,404 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-03-10 22:16:18,874 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2021-03-10 22:16:19,069 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 44 [2021-03-10 22:16:19,311 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2021-03-10 22:16:19,478 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2021-03-10 22:16:19,692 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2021-03-10 22:16:19,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:16:19,819 INFO L93 Difference]: Finished difference Result 231 states and 453 transitions. [2021-03-10 22:16:19,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 22:16:19,820 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:16:19,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:16:19,820 INFO L225 Difference]: With dead ends: 231 [2021-03-10 22:16:19,820 INFO L226 Difference]: Without dead ends: 198 [2021-03-10 22:16:19,820 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 2237.4ms TimeCoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2021-03-10 22:16:19,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-03-10 22:16:19,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 139. [2021-03-10 22:16:19,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.0869565217391304) internal successors, (288), 138 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:16:19,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 288 transitions. [2021-03-10 22:16:19,821 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 288 transitions. Word has length 20 [2021-03-10 22:16:19,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:16:19,822 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 288 transitions. [2021-03-10 22:16:19,822 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:16:19,822 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 288 transitions. [2021-03-10 22:16:19,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:16:19,822 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:16:19,822 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:16:20,022 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28857,547 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:16:20,022 INFO L428 AbstractCegarLoop]: === Iteration 553 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:16:20,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:16:20,022 INFO L82 PathProgramCache]: Analyzing trace with hash 309097281, now seen corresponding path program 547 times [2021-03-10 22:16:20,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:16:20,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390389886] [2021-03-10 22:16:20,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:16:20,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:16:20,434 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:16:20,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390389886] [2021-03-10 22:16:20,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631864844] [2021-03-10 22:16:20,434 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 548 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 548 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:16:20,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:16:20,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 22:16:20,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:16:20,777 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2021-03-10 22:16:20,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:16:20,950 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:20,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:16:20,955 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:20,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:16:20,960 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:21,007 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:16:21,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:16:21,013 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:21,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:16:21,018 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:21,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:16:21,024 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:21,065 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:16:21,066 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:16:21,067 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:88, output treesize:52 [2021-03-10 22:16:21,214 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:16:21,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:16:21,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-03-10 22:16:21,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969114486] [2021-03-10 22:16:21,215 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:16:21,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:16:21,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:16:21,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:16:21,215 INFO L87 Difference]: Start difference. First operand 139 states and 288 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:16:21,791 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2021-03-10 22:16:21,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:16:21,835 INFO L93 Difference]: Finished difference Result 161 states and 324 transitions. [2021-03-10 22:16:21,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:16:21,836 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:16:21,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:16:21,836 INFO L225 Difference]: With dead ends: 161 [2021-03-10 22:16:21,836 INFO L226 Difference]: Without dead ends: 148 [2021-03-10 22:16:21,836 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 994.6ms TimeCoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:16:21,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-03-10 22:16:21,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 141. [2021-03-10 22:16:21,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.085714285714286) internal successors, (292), 140 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:16:21,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 292 transitions. [2021-03-10 22:16:21,838 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 292 transitions. Word has length 20 [2021-03-10 22:16:21,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:16:21,838 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 292 transitions. [2021-03-10 22:16:21,838 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:16:21,838 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 292 transitions. [2021-03-10 22:16:21,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:16:21,838 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:16:21,838 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:16:22,038 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 548 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28922 [2021-03-10 22:16:22,038 INFO L428 AbstractCegarLoop]: === Iteration 554 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:16:22,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:16:22,039 INFO L82 PathProgramCache]: Analyzing trace with hash -170187395, now seen corresponding path program 548 times [2021-03-10 22:16:22,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:16:22,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298668246] [2021-03-10 22:16:22,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:16:22,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:16:22,389 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:16:22,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298668246] [2021-03-10 22:16:22,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698564882] [2021-03-10 22:16:22,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 549 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 549 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:16:22,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:16:22,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:16:22,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 22:16:22,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:16:22,737 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2021-03-10 22:16:22,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:16:22,855 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:22,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:16:22,861 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:22,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:16:22,867 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:22,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:16:22,873 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:22,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:16:22,879 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:22,989 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-03-10 22:16:22,989 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:16:22,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:16:22,995 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:22,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:16:23,001 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:23,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:16:23,007 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:23,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:16:23,013 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:23,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:16:23,019 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:23,112 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:16:23,114 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 22:16:23,114 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 3 variables, input treesize:168, output treesize:100 [2021-03-10 22:16:23,273 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2021-03-10 22:16:23,434 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:16:23,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:16:23,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-03-10 22:16:23,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552368588] [2021-03-10 22:16:23,434 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:16:23,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:16:23,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:16:23,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:16:23,434 INFO L87 Difference]: Start difference. First operand 141 states and 292 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:16:23,596 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2021-03-10 22:16:24,240 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2021-03-10 22:16:24,419 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2021-03-10 22:16:24,627 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2021-03-10 22:16:24,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:16:24,782 INFO L93 Difference]: Finished difference Result 204 states and 403 transitions. [2021-03-10 22:16:24,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 22:16:24,783 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:16:24,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:16:24,783 INFO L225 Difference]: With dead ends: 204 [2021-03-10 22:16:24,783 INFO L226 Difference]: Without dead ends: 178 [2021-03-10 22:16:24,783 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 1557.0ms TimeCoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:16:24,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-03-10 22:16:24,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 142. [2021-03-10 22:16:24,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.0851063829787235) internal successors, (294), 141 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:16:24,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 294 transitions. [2021-03-10 22:16:24,784 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 294 transitions. Word has length 20 [2021-03-10 22:16:24,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:16:24,785 INFO L480 AbstractCegarLoop]: Abstraction has 142 states and 294 transitions. [2021-03-10 22:16:24,785 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:16:24,785 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 294 transitions. [2021-03-10 22:16:24,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:16:24,785 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:16:24,785 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:16:24,985 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 549 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28953 [2021-03-10 22:16:24,985 INFO L428 AbstractCegarLoop]: === Iteration 555 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:16:24,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:16:24,985 INFO L82 PathProgramCache]: Analyzing trace with hash -705417197, now seen corresponding path program 549 times [2021-03-10 22:16:24,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:16:24,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881399161] [2021-03-10 22:16:24,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:16:24,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:16:25,339 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:16:25,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881399161] [2021-03-10 22:16:25,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550182920] [2021-03-10 22:16:25,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 550 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 550 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:16:25,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 22:16:25,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:16:25,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 22:16:25,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:16:25,683 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2021-03-10 22:16:25,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:16:25,777 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:25,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:16:25,783 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:25,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:16:25,790 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:25,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:16:25,795 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:25,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:16:25,802 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:25,908 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-03-10 22:16:25,909 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:16:25,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:16:25,915 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:25,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:16:25,921 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:25,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:16:25,927 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:25,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:16:25,933 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:25,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:16:25,939 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:26,032 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:16:26,034 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 22:16:26,034 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 3 variables, input treesize:172, output treesize:104 [2021-03-10 22:16:26,190 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2021-03-10 22:16:26,355 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:16:26,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:16:26,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-03-10 22:16:26,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662706349] [2021-03-10 22:16:26,356 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:16:26,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:16:26,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:16:26,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:16:26,356 INFO L87 Difference]: Start difference. First operand 142 states and 294 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:16:27,595 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 36 [2021-03-10 22:16:27,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:16:27,747 INFO L93 Difference]: Finished difference Result 173 states and 354 transitions. [2021-03-10 22:16:27,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 22:16:27,748 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:16:27,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:16:27,748 INFO L225 Difference]: With dead ends: 173 [2021-03-10 22:16:27,748 INFO L226 Difference]: Without dead ends: 161 [2021-03-10 22:16:27,749 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1648.1ms TimeCoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2021-03-10 22:16:27,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-03-10 22:16:27,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 143. [2021-03-10 22:16:27,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.091549295774648) internal successors, (297), 142 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:16:27,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 297 transitions. [2021-03-10 22:16:27,750 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 297 transitions. Word has length 20 [2021-03-10 22:16:27,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:16:27,750 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 297 transitions. [2021-03-10 22:16:27,750 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:16:27,750 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 297 transitions. [2021-03-10 22:16:27,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:16:27,750 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:16:27,750 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:16:27,950 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28985,550 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:16:27,950 INFO L428 AbstractCegarLoop]: === Iteration 556 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:16:27,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:16:27,951 INFO L82 PathProgramCache]: Analyzing trace with hash 624334103, now seen corresponding path program 550 times [2021-03-10 22:16:27,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:16:27,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060981018] [2021-03-10 22:16:27,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:16:27,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:16:28,336 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:16:28,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060981018] [2021-03-10 22:16:28,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800712971] [2021-03-10 22:16:28,336 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 551 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 551 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:16:28,458 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:16:28,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:16:28,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 22:16:28,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:16:29,667 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:16:29,668 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:29,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:29,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:29,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:16:29,676 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:29,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:29,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:29,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:16:29,686 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:29,691 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:16:29,693 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:29,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:29,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:29,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:16:29,701 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:29,707 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:16:29,708 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:29,713 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:16:29,715 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:29,720 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:16:29,721 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:29,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:29,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:29,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-03-10 22:16:29,730 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:29,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:29,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:29,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-03-10 22:16:29,738 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:29,743 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:16:29,744 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:29,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:29,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:16:29,751 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:29,856 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2021-03-10 22:16:29,856 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-03-10 22:16:29,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:16:29,862 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:29,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:16:29,868 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:29,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:16:29,873 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:29,915 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:16:29,917 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:16:29,917 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:467, output treesize:52 [2021-03-10 22:16:30,073 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:16:30,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:16:30,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-03-10 22:16:30,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081104260] [2021-03-10 22:16:30,073 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 22:16:30,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:16:30,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 22:16:30,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:16:30,074 INFO L87 Difference]: Start difference. First operand 143 states and 297 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:16:30,849 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 64 [2021-03-10 22:16:31,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:16:31,191 INFO L93 Difference]: Finished difference Result 176 states and 359 transitions. [2021-03-10 22:16:31,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 22:16:31,192 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:16:31,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:16:31,192 INFO L225 Difference]: With dead ends: 176 [2021-03-10 22:16:31,192 INFO L226 Difference]: Without dead ends: 157 [2021-03-10 22:16:31,192 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1403.1ms TimeCoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:16:31,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-03-10 22:16:31,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 145. [2021-03-10 22:16:31,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.0902777777777777) internal successors, (301), 144 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:16:31,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 301 transitions. [2021-03-10 22:16:31,193 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 301 transitions. Word has length 20 [2021-03-10 22:16:31,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:16:31,194 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 301 transitions. [2021-03-10 22:16:31,194 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:16:31,194 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 301 transitions. [2021-03-10 22:16:31,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:16:31,194 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:16:31,194 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:16:31,394 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29012,551 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:16:31,394 INFO L428 AbstractCegarLoop]: === Iteration 557 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:16:31,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:16:31,394 INFO L82 PathProgramCache]: Analyzing trace with hash -406738861, now seen corresponding path program 551 times [2021-03-10 22:16:31,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:16:31,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091059838] [2021-03-10 22:16:31,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:16:31,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:16:31,788 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:16:31,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091059838] [2021-03-10 22:16:31,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182774197] [2021-03-10 22:16:31,789 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 552 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 552 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:16:31,913 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 22:16:31,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:16:31,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 22:16:31,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:16:32,162 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2021-03-10 22:16:33,179 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:16:33,181 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:33,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:33,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:33,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:16:33,189 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:33,195 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:16:33,196 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:33,201 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:16:33,203 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:33,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:33,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:33,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:16:33,211 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:33,216 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:16:33,217 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:33,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:33,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:33,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:16:33,226 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:33,231 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:16:33,232 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:33,237 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:16:33,238 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:33,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:33,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:33,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-03-10 22:16:33,247 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:33,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:33,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:33,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-03-10 22:16:33,255 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:33,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:33,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:16:33,261 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:33,367 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2021-03-10 22:16:33,367 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-03-10 22:16:33,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:16:33,373 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:33,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:16:33,379 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:33,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:16:33,384 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:33,427 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:16:33,429 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:16:33,429 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:467, output treesize:52 [2021-03-10 22:16:33,581 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:16:33,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:16:33,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-03-10 22:16:33,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908777253] [2021-03-10 22:16:33,581 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 22:16:33,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:16:33,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 22:16:33,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:16:33,581 INFO L87 Difference]: Start difference. First operand 145 states and 301 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:16:33,724 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 34 [2021-03-10 22:16:34,399 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 57 [2021-03-10 22:16:34,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:16:34,473 INFO L93 Difference]: Finished difference Result 174 states and 350 transitions. [2021-03-10 22:16:34,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:16:34,474 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:16:34,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:16:34,474 INFO L225 Difference]: With dead ends: 174 [2021-03-10 22:16:34,474 INFO L226 Difference]: Without dead ends: 158 [2021-03-10 22:16:34,474 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 1506.2ms TimeCoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:16:34,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-03-10 22:16:34,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 146. [2021-03-10 22:16:34,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.089655172413793) internal successors, (303), 145 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:16:34,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 303 transitions. [2021-03-10 22:16:34,475 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 303 transitions. Word has length 20 [2021-03-10 22:16:34,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:16:34,475 INFO L480 AbstractCegarLoop]: Abstraction has 146 states and 303 transitions. [2021-03-10 22:16:34,475 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:16:34,475 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 303 transitions. [2021-03-10 22:16:34,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:16:34,476 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:16:34,476 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:16:34,676 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 552 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable29118 [2021-03-10 22:16:34,676 INFO L428 AbstractCegarLoop]: === Iteration 558 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:16:34,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:16:34,676 INFO L82 PathProgramCache]: Analyzing trace with hash 1915305367, now seen corresponding path program 552 times [2021-03-10 22:16:34,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:16:34,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41416193] [2021-03-10 22:16:34,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:16:34,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:16:35,084 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:16:35,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41416193] [2021-03-10 22:16:35,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048292834] [2021-03-10 22:16:35,085 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 553 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 553 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:16:35,210 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:16:35,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:16:35,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 22:16:35,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:16:35,461 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2021-03-10 22:16:36,549 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:16:36,551 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:36,556 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:16:36,557 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:36,563 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:16:36,564 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:36,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:36,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:36,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:16:36,573 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:36,578 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:16:36,580 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:36,585 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:16:36,586 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:36,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:36,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:36,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:16:36,594 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:36,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:36,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:36,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:16:36,603 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:36,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:36,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:36,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-03-10 22:16:36,611 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:36,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:36,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:36,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-03-10 22:16:36,620 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:36,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:36,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:36,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:16:36,629 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:36,634 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:16:36,636 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:36,744 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2021-03-10 22:16:36,744 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-03-10 22:16:36,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:16:36,750 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:36,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:16:36,756 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:36,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:16:36,762 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:36,805 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:16:36,806 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:16:36,806 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:467, output treesize:52 [2021-03-10 22:16:36,964 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:16:36,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:16:36,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-03-10 22:16:36,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801076012] [2021-03-10 22:16:36,964 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 22:16:36,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:16:36,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 22:16:36,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:16:36,964 INFO L87 Difference]: Start difference. First operand 146 states and 303 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:16:37,823 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2021-03-10 22:16:38,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:16:38,034 INFO L93 Difference]: Finished difference Result 170 states and 347 transitions. [2021-03-10 22:16:38,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:16:38,035 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:16:38,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:16:38,035 INFO L225 Difference]: With dead ends: 170 [2021-03-10 22:16:38,035 INFO L226 Difference]: Without dead ends: 157 [2021-03-10 22:16:38,035 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1610.0ms TimeCoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:16:38,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-03-10 22:16:38,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 147. [2021-03-10 22:16:38,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 2.089041095890411) internal successors, (305), 146 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:16:38,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 305 transitions. [2021-03-10 22:16:38,036 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 305 transitions. Word has length 20 [2021-03-10 22:16:38,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:16:38,036 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 305 transitions. [2021-03-10 22:16:38,036 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:16:38,037 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 305 transitions. [2021-03-10 22:16:38,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:16:38,037 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:16:38,037 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:16:38,237 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29258,553 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:16:38,237 INFO L428 AbstractCegarLoop]: === Iteration 559 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:16:38,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:16:38,237 INFO L82 PathProgramCache]: Analyzing trace with hash 1436020691, now seen corresponding path program 553 times [2021-03-10 22:16:38,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:16:38,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835806192] [2021-03-10 22:16:38,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:16:38,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:16:38,624 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:16:38,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835806192] [2021-03-10 22:16:38,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857080923] [2021-03-10 22:16:38,624 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 554 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 554 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:16:38,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:16:38,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 22:16:38,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:16:40,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:40,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:40,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:16:40,921 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:40,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:40,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:40,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:16:40,930 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:40,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:40,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:40,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:16:40,940 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:40,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:40,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:40,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:16:40,950 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:40,956 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:16:40,958 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:40,964 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:16:40,965 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:40,972 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:16:40,973 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:40,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:40,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:40,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-03-10 22:16:40,983 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:40,989 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:16:40,991 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:40,997 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:16:40,998 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:41,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:41,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:41,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:16:41,008 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:41,014 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:41,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:41,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-03-10 22:16:41,018 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:41,024 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:16:41,025 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:41,032 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:16:41,033 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:41,039 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:16:41,041 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:41,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:41,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:41,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-03-10 22:16:41,051 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:41,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:41,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:41,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:16:41,060 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:41,066 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:16:41,067 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:41,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:41,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:41,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:16:41,077 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:41,082 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:16:41,084 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:41,333 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 72 [2021-03-10 22:16:41,333 INFO L628 ElimStorePlain]: treesize reduction 22, result has 87.6 percent of original size [2021-03-10 22:16:41,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:16:41,340 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:41,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:16:41,347 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:41,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:16:41,354 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:41,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:16:41,360 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:41,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:16:41,367 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:41,469 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-03-10 22:16:41,469 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:16:41,471 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 22:16:41,472 INFO L247 ElimStorePlain]: Needed 26 recursive calls to eliminate 5 variables, input treesize:897, output treesize:100 [2021-03-10 22:16:41,643 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-03-10 22:16:41,817 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:16:41,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:16:41,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-03-10 22:16:41,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481803171] [2021-03-10 22:16:41,817 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 22:16:41,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:16:41,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 22:16:41,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:16:41,818 INFO L87 Difference]: Start difference. First operand 147 states and 305 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:16:42,691 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2021-03-10 22:16:42,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:16:42,849 INFO L93 Difference]: Finished difference Result 169 states and 345 transitions. [2021-03-10 22:16:42,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:16:42,850 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:16:42,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:16:42,850 INFO L225 Difference]: With dead ends: 169 [2021-03-10 22:16:42,850 INFO L226 Difference]: Without dead ends: 157 [2021-03-10 22:16:42,850 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1478.5ms TimeCoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:16:42,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-03-10 22:16:42,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 144. [2021-03-10 22:16:42,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.090909090909091) internal successors, (299), 143 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:16:42,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 299 transitions. [2021-03-10 22:16:42,852 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 299 transitions. Word has length 20 [2021-03-10 22:16:42,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:16:42,852 INFO L480 AbstractCegarLoop]: Abstraction has 144 states and 299 transitions. [2021-03-10 22:16:42,852 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:16:42,852 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 299 transitions. [2021-03-10 22:16:42,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:16:42,852 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:16:42,852 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:16:43,052 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29401,554 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:16:43,052 INFO L428 AbstractCegarLoop]: === Iteration 560 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:16:43,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:16:43,052 INFO L82 PathProgramCache]: Analyzing trace with hash 633496937, now seen corresponding path program 554 times [2021-03-10 22:16:43,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:16:43,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877667135] [2021-03-10 22:16:43,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:16:43,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:16:43,415 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:16:43,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877667135] [2021-03-10 22:16:43,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933122414] [2021-03-10 22:16:43,415 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 555 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 555 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:16:43,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:16:43,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:16:43,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 22:16:43,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:16:44,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:44,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:44,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-03-10 22:16:44,790 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:44,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:44,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:44,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:16:44,799 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:44,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:44,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:44,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:16:44,808 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:44,813 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:16:44,815 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:44,820 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:44,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:44,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:16:44,824 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:44,829 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:16:44,830 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:44,835 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:16:44,837 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:44,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:44,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:44,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-03-10 22:16:44,845 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:44,850 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:16:44,852 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:44,857 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:16:44,858 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:44,862 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:16:44,864 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:44,868 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:44,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:16:44,870 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:44,991 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2021-03-10 22:16:44,992 INFO L628 ElimStorePlain]: treesize reduction 14, result has 86.5 percent of original size [2021-03-10 22:16:44,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:16:44,998 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:45,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:16:45,007 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:45,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:16:45,012 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:45,066 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:16:45,067 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:16:45,067 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:521, output treesize:62 [2021-03-10 22:16:45,304 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:16:45,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:16:45,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-03-10 22:16:45,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353989923] [2021-03-10 22:16:45,304 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:16:45,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:16:45,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:16:45,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:16:45,304 INFO L87 Difference]: Start difference. First operand 144 states and 299 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:16:46,046 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2021-03-10 22:16:46,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:16:46,293 INFO L93 Difference]: Finished difference Result 173 states and 353 transitions. [2021-03-10 22:16:46,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 22:16:46,294 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:16:46,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:16:46,294 INFO L225 Difference]: With dead ends: 173 [2021-03-10 22:16:46,294 INFO L226 Difference]: Without dead ends: 157 [2021-03-10 22:16:46,294 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1273.3ms TimeCoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:16:46,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-03-10 22:16:46,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 146. [2021-03-10 22:16:46,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.089655172413793) internal successors, (303), 145 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:16:46,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 303 transitions. [2021-03-10 22:16:46,296 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 303 transitions. Word has length 20 [2021-03-10 22:16:46,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:16:46,296 INFO L480 AbstractCegarLoop]: Abstraction has 146 states and 303 transitions. [2021-03-10 22:16:46,296 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:16:46,296 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 303 transitions. [2021-03-10 22:16:46,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:16:46,296 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:16:46,296 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:16:46,496 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29544,555 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:16:46,496 INFO L428 AbstractCegarLoop]: === Iteration 561 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:16:46,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:16:46,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1339426131, now seen corresponding path program 555 times [2021-03-10 22:16:46,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:16:46,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269927586] [2021-03-10 22:16:46,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:16:46,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:16:46,884 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:16:46,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269927586] [2021-03-10 22:16:46,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646805860] [2021-03-10 22:16:46,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 556 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 556 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:16:47,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 22:16:47,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:16:47,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 22:16:47,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:16:47,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:47,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:47,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-03-10 22:16:47,941 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:47,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:47,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:47,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:16:47,950 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:47,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:47,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:47,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:16:47,959 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:47,965 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:16:47,966 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:47,972 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:16:47,973 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:47,979 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:16:47,980 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:47,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:47,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:47,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-03-10 22:16:47,989 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:47,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:47,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:47,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:16:47,998 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:48,004 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:16:48,005 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:48,011 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:16:48,012 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:48,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:48,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:48,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:16:48,020 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:48,025 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:16:48,026 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:48,147 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2021-03-10 22:16:48,148 INFO L628 ElimStorePlain]: treesize reduction 14, result has 86.5 percent of original size [2021-03-10 22:16:48,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:16:48,153 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:48,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:16:48,160 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:48,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:16:48,166 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:48,216 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:16:48,218 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:16:48,218 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:521, output treesize:62 [2021-03-10 22:16:48,444 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:16:48,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:16:48,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-03-10 22:16:48,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76431678] [2021-03-10 22:16:48,444 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:16:48,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:16:48,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:16:48,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:16:48,444 INFO L87 Difference]: Start difference. First operand 146 states and 303 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:16:49,318 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 59 [2021-03-10 22:16:49,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:16:49,552 INFO L93 Difference]: Finished difference Result 170 states and 347 transitions. [2021-03-10 22:16:49,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:16:49,554 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:16:49,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:16:49,554 INFO L225 Difference]: With dead ends: 170 [2021-03-10 22:16:49,554 INFO L226 Difference]: Without dead ends: 157 [2021-03-10 22:16:49,554 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 1339.9ms TimeCoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:16:49,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-03-10 22:16:49,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 147. [2021-03-10 22:16:49,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 2.089041095890411) internal successors, (305), 146 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:16:49,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 305 transitions. [2021-03-10 22:16:49,555 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 305 transitions. Word has length 20 [2021-03-10 22:16:49,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:16:49,555 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 305 transitions. [2021-03-10 22:16:49,555 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:16:49,555 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 305 transitions. [2021-03-10 22:16:49,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:16:49,556 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:16:49,556 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:16:49,756 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29645,556 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:16:49,756 INFO L428 AbstractCegarLoop]: === Iteration 562 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:16:49,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:16:49,756 INFO L82 PathProgramCache]: Analyzing trace with hash -1818710807, now seen corresponding path program 556 times [2021-03-10 22:16:49,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:16:49,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583965704] [2021-03-10 22:16:49,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:16:49,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:16:50,147 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:16:50,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583965704] [2021-03-10 22:16:50,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746298619] [2021-03-10 22:16:50,148 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 557 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 557 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:16:50,273 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:16:50,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:16:50,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 22:16:50,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:16:52,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:52,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:52,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:16:52,402 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:52,409 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:16:52,410 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:52,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:52,418 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:52,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-03-10 22:16:52,421 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:52,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:52,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:52,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:16:52,430 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:52,437 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:16:52,438 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:52,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:52,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:52,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:16:52,448 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:52,454 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:16:52,455 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:52,461 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:16:52,463 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:52,468 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:16:52,470 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:52,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:52,477 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:52,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:16:52,479 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:52,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:52,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:52,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-03-10 22:16:52,489 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:52,495 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:16:52,496 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:52,501 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:16:52,503 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:52,508 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:16:52,510 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:52,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:52,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:52,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:16:52,518 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:52,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:16:52,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:16:52,525 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:52,734 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 68 [2021-03-10 22:16:52,735 INFO L628 ElimStorePlain]: treesize reduction 18, result has 88.5 percent of original size [2021-03-10 22:16:52,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:16:52,742 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:52,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:16:52,749 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:52,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:16:52,755 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:52,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:16:52,762 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:52,851 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:16:52,853 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:16:52,853 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 5 variables, input treesize:777, output treesize:89 [2021-03-10 22:16:53,141 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:16:53,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:16:53,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-03-10 22:16:53,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121068301] [2021-03-10 22:16:53,142 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:16:53,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:16:53,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:16:53,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:16:53,142 INFO L87 Difference]: Start difference. First operand 147 states and 305 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:16:53,349 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 45 [2021-03-10 22:16:53,715 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2021-03-10 22:16:54,224 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2021-03-10 22:16:54,446 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 46 [2021-03-10 22:16:54,717 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2021-03-10 22:16:54,890 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2021-03-10 22:16:55,114 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2021-03-10 22:16:55,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:16:55,242 INFO L93 Difference]: Finished difference Result 237 states and 466 transitions. [2021-03-10 22:16:55,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 22:16:55,243 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:16:55,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:16:55,243 INFO L225 Difference]: With dead ends: 237 [2021-03-10 22:16:55,243 INFO L226 Difference]: Without dead ends: 204 [2021-03-10 22:16:55,243 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 2294.2ms TimeCoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2021-03-10 22:16:55,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-03-10 22:16:55,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 145. [2021-03-10 22:16:55,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.0902777777777777) internal successors, (301), 144 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:16:55,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 301 transitions. [2021-03-10 22:16:55,244 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 301 transitions. Word has length 20 [2021-03-10 22:16:55,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:16:55,245 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 301 transitions. [2021-03-10 22:16:55,245 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:16:55,245 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 301 transitions. [2021-03-10 22:16:55,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:16:55,245 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:16:55,245 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:16:55,445 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29747,557 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:16:55,445 INFO L428 AbstractCegarLoop]: === Iteration 563 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:16:55,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:16:55,445 INFO L82 PathProgramCache]: Analyzing trace with hash -751680809, now seen corresponding path program 557 times [2021-03-10 22:16:55,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:16:55,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609234309] [2021-03-10 22:16:55,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:16:55,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:16:55,808 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:16:55,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609234309] [2021-03-10 22:16:55,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180664478] [2021-03-10 22:16:55,808 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 558 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 558 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:16:55,933 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 22:16:55,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:16:55,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 22:16:55,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:16:56,165 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2021-03-10 22:16:56,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:16:56,404 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:56,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:16:56,410 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:56,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:16:56,415 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:56,464 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:16:56,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:16:56,470 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:56,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:16:56,475 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:56,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:16:56,481 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:56,523 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:16:56,524 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:16:56,524 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:84, output treesize:48 [2021-03-10 22:16:56,674 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:16:56,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:16:56,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-03-10 22:16:56,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525871863] [2021-03-10 22:16:56,674 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:16:56,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:16:56,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:16:56,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:16:56,675 INFO L87 Difference]: Start difference. First operand 145 states and 301 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:16:57,348 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 31 [2021-03-10 22:16:57,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:16:57,510 INFO L93 Difference]: Finished difference Result 170 states and 347 transitions. [2021-03-10 22:16:57,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:16:57,511 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:16:57,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:16:57,511 INFO L225 Difference]: With dead ends: 170 [2021-03-10 22:16:57,511 INFO L226 Difference]: Without dead ends: 157 [2021-03-10 22:16:57,511 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 1154.3ms TimeCoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:16:57,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-03-10 22:16:57,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 147. [2021-03-10 22:16:57,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 2.089041095890411) internal successors, (305), 146 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:16:57,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 305 transitions. [2021-03-10 22:16:57,512 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 305 transitions. Word has length 20 [2021-03-10 22:16:57,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:16:57,512 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 305 transitions. [2021-03-10 22:16:57,512 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:16:57,513 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 305 transitions. [2021-03-10 22:16:57,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:16:57,513 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:16:57,513 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:16:57,713 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29881,558 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:16:57,713 INFO L428 AbstractCegarLoop]: === Iteration 564 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:16:57,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:16:57,713 INFO L82 PathProgramCache]: Analyzing trace with hash -1230965485, now seen corresponding path program 558 times [2021-03-10 22:16:57,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:16:57,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415760577] [2021-03-10 22:16:57,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:16:57,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:16:58,115 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:16:58,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415760577] [2021-03-10 22:16:58,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910111044] [2021-03-10 22:16:58,116 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 559 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 559 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:16:58,241 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 22:16:58,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:16:58,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 22:16:58,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:16:58,487 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37 [2021-03-10 22:16:58,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:16:58,649 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:58,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:16:58,655 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:58,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:16:58,661 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:58,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:16:58,668 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:58,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:16:58,674 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:58,789 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 57 [2021-03-10 22:16:58,790 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:16:58,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:16:58,796 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:58,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:16:58,803 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:58,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:16:58,809 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:58,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:16:58,816 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:58,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:16:58,821 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:16:58,924 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-03-10 22:16:58,924 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:16:58,926 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 22:16:58,926 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 3 variables, input treesize:168, output treesize:100 [2021-03-10 22:16:59,097 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2021-03-10 22:16:59,271 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:16:59,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:16:59,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-03-10 22:16:59,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231779343] [2021-03-10 22:16:59,272 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:16:59,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:16:59,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:16:59,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:16:59,272 INFO L87 Difference]: Start difference. First operand 147 states and 305 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:17:00,304 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 36 [2021-03-10 22:17:00,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:17:00,536 INFO L93 Difference]: Finished difference Result 188 states and 371 transitions. [2021-03-10 22:17:00,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:17:00,537 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:17:00,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:17:00,537 INFO L225 Difference]: With dead ends: 188 [2021-03-10 22:17:00,537 INFO L226 Difference]: Without dead ends: 169 [2021-03-10 22:17:00,538 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1554.5ms TimeCoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:17:00,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-03-10 22:17:00,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 149. [2021-03-10 22:17:00,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.1013513513513513) internal successors, (311), 148 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:17:00,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 311 transitions. [2021-03-10 22:17:00,539 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 311 transitions. Word has length 20 [2021-03-10 22:17:00,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:17:00,539 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 311 transitions. [2021-03-10 22:17:00,539 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:17:00,539 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 311 transitions. [2021-03-10 22:17:00,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:17:00,539 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:17:00,539 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:17:00,739 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 559 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable29917 [2021-03-10 22:17:00,740 INFO L428 AbstractCegarLoop]: === Iteration 565 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:17:00,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:17:00,740 INFO L82 PathProgramCache]: Analyzing trace with hash -1766195287, now seen corresponding path program 559 times [2021-03-10 22:17:00,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:17:00,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804149496] [2021-03-10 22:17:00,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:17:00,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:17:01,108 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:17:01,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804149496] [2021-03-10 22:17:01,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153226014] [2021-03-10 22:17:01,109 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 560 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 560 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:17:01,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:17:01,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 22:17:01,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:17:01,457 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 35 [2021-03-10 22:17:01,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:17:01,556 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:01,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:17:01,562 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:01,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:17:01,568 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:01,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:17:01,574 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:01,662 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:17:01,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:17:01,668 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:01,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:17:01,674 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:01,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:17:01,680 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:01,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:17:01,686 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:01,763 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:17:01,765 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:17:01,765 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:135, output treesize:79 [2021-03-10 22:17:02,029 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:17:02,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:17:02,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-03-10 22:17:02,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243655690] [2021-03-10 22:17:02,029 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:17:02,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:17:02,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:17:02,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:17:02,030 INFO L87 Difference]: Start difference. First operand 149 states and 311 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:17:02,601 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2021-03-10 22:17:02,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:17:02,769 INFO L93 Difference]: Finished difference Result 187 states and 380 transitions. [2021-03-10 22:17:02,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:17:02,771 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:17:02,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:17:02,771 INFO L225 Difference]: With dead ends: 187 [2021-03-10 22:17:02,771 INFO L226 Difference]: Without dead ends: 168 [2021-03-10 22:17:02,771 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1037.1ms TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:17:02,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-03-10 22:17:02,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 149. [2021-03-10 22:17:02,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.1013513513513513) internal successors, (311), 148 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:17:02,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 311 transitions. [2021-03-10 22:17:02,772 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 311 transitions. Word has length 20 [2021-03-10 22:17:02,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:17:02,772 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 311 transitions. [2021-03-10 22:17:02,772 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:17:02,772 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 311 transitions. [2021-03-10 22:17:02,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:17:02,773 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:17:02,773 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:17:02,973 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29960,560 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:17:02,973 INFO L428 AbstractCegarLoop]: === Iteration 566 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:17:02,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:17:02,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1478931693, now seen corresponding path program 560 times [2021-03-10 22:17:02,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:17:02,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989382954] [2021-03-10 22:17:02,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:17:02,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:17:03,366 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:17:03,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989382954] [2021-03-10 22:17:03,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250491748] [2021-03-10 22:17:03,366 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 561 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 561 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:17:03,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:17:03,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:17:03,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 22:17:03,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:17:04,740 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:17:04,742 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:04,747 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:17:04,749 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:04,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:17:04,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:17:04,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:17:04,758 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:04,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:17:04,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:17:04,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-03-10 22:17:04,767 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:04,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:17:04,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:17:04,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:17:04,776 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:04,782 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:17:04,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:17:04,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-03-10 22:17:04,785 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:04,791 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:17:04,792 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:04,797 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:17:04,799 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:04,804 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:17:04,805 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:04,810 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:17:04,811 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:04,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:17:04,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:17:04,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:17:04,819 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:04,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:17:04,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:17:04,826 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:04,950 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2021-03-10 22:17:04,950 INFO L628 ElimStorePlain]: treesize reduction 14, result has 86.5 percent of original size [2021-03-10 22:17:04,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:17:04,957 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:04,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:17:04,963 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:04,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:17:04,969 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:05,021 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:17:05,022 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:17:05,022 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:521, output treesize:62 [2021-03-10 22:17:05,239 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:17:05,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:17:05,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-03-10 22:17:05,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646388048] [2021-03-10 22:17:05,240 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:17:05,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:17:05,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:17:05,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:17:05,240 INFO L87 Difference]: Start difference. First operand 149 states and 311 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:17:05,950 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2021-03-10 22:17:06,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:17:06,168 INFO L93 Difference]: Finished difference Result 179 states and 367 transitions. [2021-03-10 22:17:06,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 22:17:06,169 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:17:06,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:17:06,170 INFO L225 Difference]: With dead ends: 179 [2021-03-10 22:17:06,170 INFO L226 Difference]: Without dead ends: 163 [2021-03-10 22:17:06,170 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1317.1ms TimeCoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:17:06,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-03-10 22:17:06,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 152. [2021-03-10 22:17:06,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.0993377483443707) internal successors, (317), 151 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:17:06,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 317 transitions. [2021-03-10 22:17:06,171 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 317 transitions. Word has length 20 [2021-03-10 22:17:06,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:17:06,171 INFO L480 AbstractCegarLoop]: Abstraction has 152 states and 317 transitions. [2021-03-10 22:17:06,171 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:17:06,171 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 317 transitions. [2021-03-10 22:17:06,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:17:06,171 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:17:06,171 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:17:06,372 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29986,561 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:17:06,372 INFO L428 AbstractCegarLoop]: === Iteration 567 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:17:06,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:17:06,372 INFO L82 PathProgramCache]: Analyzing trace with hash 843112535, now seen corresponding path program 561 times [2021-03-10 22:17:06,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:17:06,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567716681] [2021-03-10 22:17:06,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:17:06,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:17:06,767 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:17:06,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567716681] [2021-03-10 22:17:06,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449155407] [2021-03-10 22:17:06,767 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 562 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 562 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:17:06,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 22:17:06,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:17:06,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 22:17:06,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:17:07,832 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:17:07,834 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:07,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:17:07,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:17:07,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:17:07,843 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:07,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:17:07,850 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:17:07,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:17:07,852 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:07,858 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:17:07,859 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:07,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:17:07,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:17:07,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-03-10 22:17:07,869 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:07,875 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:17:07,876 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:07,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:17:07,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:17:07,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-03-10 22:17:07,886 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:07,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:17:07,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:17:07,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:17:07,895 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:07,900 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:17:07,902 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:07,907 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:17:07,908 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:07,913 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:17:07,915 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:07,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:17:07,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:17:07,922 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:08,047 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2021-03-10 22:17:08,047 INFO L628 ElimStorePlain]: treesize reduction 14, result has 86.5 percent of original size [2021-03-10 22:17:08,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:17:08,054 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:08,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:17:08,060 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:08,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:17:08,066 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:08,118 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:17:08,120 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:17:08,120 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:521, output treesize:62 [2021-03-10 22:17:08,337 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:17:08,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:17:08,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-03-10 22:17:08,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422745533] [2021-03-10 22:17:08,337 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:17:08,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:17:08,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:17:08,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:17:08,337 INFO L87 Difference]: Start difference. First operand 152 states and 317 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:17:08,498 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 36 [2021-03-10 22:17:09,178 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 59 [2021-03-10 22:17:09,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:17:09,239 INFO L93 Difference]: Finished difference Result 178 states and 361 transitions. [2021-03-10 22:17:09,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:17:09,241 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:17:09,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:17:09,241 INFO L225 Difference]: With dead ends: 178 [2021-03-10 22:17:09,241 INFO L226 Difference]: Without dead ends: 165 [2021-03-10 22:17:09,241 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1348.8ms TimeCoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:17:09,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-03-10 22:17:09,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 153. [2021-03-10 22:17:09,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.098684210526316) internal successors, (319), 152 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:17:09,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 319 transitions. [2021-03-10 22:17:09,242 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 319 transitions. Word has length 20 [2021-03-10 22:17:09,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:17:09,242 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 319 transitions. [2021-03-10 22:17:09,242 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:17:09,242 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 319 transitions. [2021-03-10 22:17:09,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:17:09,243 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:17:09,243 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:17:09,443 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 562 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30171 [2021-03-10 22:17:09,443 INFO L428 AbstractCegarLoop]: === Iteration 568 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:17:09,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:17:09,443 INFO L82 PathProgramCache]: Analyzing trace with hash 363827859, now seen corresponding path program 562 times [2021-03-10 22:17:09,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:17:09,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236697901] [2021-03-10 22:17:09,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:17:09,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:17:09,729 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 31 [2021-03-10 22:17:09,995 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:17:09,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236697901] [2021-03-10 22:17:09,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395450395] [2021-03-10 22:17:09,995 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 563 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 563 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:17:10,120 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:17:10,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:17:10,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 22:17:10,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:17:10,406 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2021-03-10 22:17:11,802 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:17:11,804 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:11,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:17:11,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:17:11,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:17:11,814 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:11,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:17:11,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:17:11,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:17:11,825 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:11,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:17:11,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:17:11,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:17:11,835 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:11,842 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:17:11,843 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:11,850 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:17:11,851 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:11,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:17:11,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:17:11,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:17:11,861 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:11,868 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:17:11,869 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:11,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:17:11,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:17:11,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-03-10 22:17:11,880 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:11,886 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:17:11,888 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:11,894 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:17:11,895 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:11,901 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:17:11,903 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:11,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:17:11,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:17:11,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-03-10 22:17:11,913 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:11,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:17:11,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:17:11,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:17:11,922 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:11,928 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:17:11,929 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:11,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:17:11,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:17:11,937 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:12,159 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 69 [2021-03-10 22:17:12,159 INFO L628 ElimStorePlain]: treesize reduction 18, result has 88.5 percent of original size [2021-03-10 22:17:12,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:17:12,166 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:12,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:17:12,173 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:12,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:17:12,179 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:12,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:17:12,185 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:12,275 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:17:12,277 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:17:12,277 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 5 variables, input treesize:777, output treesize:89 [2021-03-10 22:17:12,617 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:17:12,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:17:12,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-03-10 22:17:12,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900126194] [2021-03-10 22:17:12,617 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:17:12,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:17:12,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:17:12,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:17:12,618 INFO L87 Difference]: Start difference. First operand 153 states and 319 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:17:13,521 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2021-03-10 22:17:13,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:17:13,719 INFO L93 Difference]: Finished difference Result 194 states and 385 transitions. [2021-03-10 22:17:13,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:17:13,720 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:17:13,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:17:13,721 INFO L225 Difference]: With dead ends: 194 [2021-03-10 22:17:13,721 INFO L226 Difference]: Without dead ends: 175 [2021-03-10 22:17:13,721 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1654.1ms TimeCoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:17:13,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-03-10 22:17:13,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 152. [2021-03-10 22:17:13,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.0993377483443707) internal successors, (317), 151 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:17:13,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 317 transitions. [2021-03-10 22:17:13,722 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 317 transitions. Word has length 20 [2021-03-10 22:17:13,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:17:13,722 INFO L480 AbstractCegarLoop]: Abstraction has 152 states and 317 transitions. [2021-03-10 22:17:13,722 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:17:13,722 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 317 transitions. [2021-03-10 22:17:13,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:17:13,722 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:17:13,723 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:17:13,923 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 563 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30276 [2021-03-10 22:17:13,923 INFO L428 AbstractCegarLoop]: === Iteration 569 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:17:13,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:17:13,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1430857857, now seen corresponding path program 563 times [2021-03-10 22:17:13,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:17:13,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058133460] [2021-03-10 22:17:13,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:17:13,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:17:14,297 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:17:14,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058133460] [2021-03-10 22:17:14,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647737822] [2021-03-10 22:17:14,298 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 564 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 564 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:17:14,423 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 22:17:14,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:17:14,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 22:17:14,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:17:14,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:17:14,744 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:14,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:17:14,750 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:14,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:17:14,756 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:14,807 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:17:14,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:17:14,813 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:14,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:17:14,819 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:14,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:17:14,825 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:14,870 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:17:14,871 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:17:14,872 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:88, output treesize:52 [2021-03-10 22:17:15,025 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:17:15,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:17:15,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-03-10 22:17:15,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074509089] [2021-03-10 22:17:15,026 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:17:15,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:17:15,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:17:15,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:17:15,026 INFO L87 Difference]: Start difference. First operand 152 states and 317 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:17:15,608 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 29 [2021-03-10 22:17:15,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:17:15,656 INFO L93 Difference]: Finished difference Result 174 states and 353 transitions. [2021-03-10 22:17:15,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:17:15,658 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:17:15,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:17:15,658 INFO L225 Difference]: With dead ends: 174 [2021-03-10 22:17:15,658 INFO L226 Difference]: Without dead ends: 161 [2021-03-10 22:17:15,658 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 884.1ms TimeCoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:17:15,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-03-10 22:17:15,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 154. [2021-03-10 22:17:15,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.0980392156862746) internal successors, (321), 153 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:17:15,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 321 transitions. [2021-03-10 22:17:15,659 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 321 transitions. Word has length 20 [2021-03-10 22:17:15,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:17:15,660 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 321 transitions. [2021-03-10 22:17:15,660 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:17:15,660 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 321 transitions. [2021-03-10 22:17:15,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:17:15,660 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:17:15,660 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:17:15,860 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 564 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30517 [2021-03-10 22:17:15,860 INFO L428 AbstractCegarLoop]: === Iteration 570 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:17:15,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:17:15,860 INFO L82 PathProgramCache]: Analyzing trace with hash 951573181, now seen corresponding path program 564 times [2021-03-10 22:17:15,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:17:15,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013187895] [2021-03-10 22:17:15,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:17:15,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:17:16,277 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:17:16,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013187895] [2021-03-10 22:17:16,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803176034] [2021-03-10 22:17:16,277 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 565 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 565 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:17:16,402 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 22:17:16,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:17:16,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 22:17:16,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:17:16,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:17:16,709 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:16,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:17:16,715 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:16,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:17:16,721 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:16,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:17:16,728 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:16,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:17:16,734 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:16,858 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-03-10 22:17:16,858 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:17:16,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:17:16,865 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:16,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:17:16,871 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:16,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:17:16,878 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:16,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:17:16,884 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:16,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:17:16,890 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:16,993 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-03-10 22:17:16,993 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:17:16,995 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 22:17:16,995 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 3 variables, input treesize:164, output treesize:96 [2021-03-10 22:17:17,165 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2021-03-10 22:17:17,340 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:17:17,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:17:17,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-03-10 22:17:17,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746013934] [2021-03-10 22:17:17,341 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:17:17,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:17:17,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:17:17,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:17:17,341 INFO L87 Difference]: Start difference. First operand 154 states and 321 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:17:18,166 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 36 [2021-03-10 22:17:18,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:17:18,324 INFO L93 Difference]: Finished difference Result 176 states and 361 transitions. [2021-03-10 22:17:18,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:17:18,325 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:17:18,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:17:18,325 INFO L225 Difference]: With dead ends: 176 [2021-03-10 22:17:18,325 INFO L226 Difference]: Without dead ends: 164 [2021-03-10 22:17:18,325 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 1359.9ms TimeCoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:17:18,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-03-10 22:17:18,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 153. [2021-03-10 22:17:18,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.098684210526316) internal successors, (319), 152 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:17:18,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 319 transitions. [2021-03-10 22:17:18,327 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 319 transitions. Word has length 20 [2021-03-10 22:17:18,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:17:18,327 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 319 transitions. [2021-03-10 22:17:18,327 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:17:18,327 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 319 transitions. [2021-03-10 22:17:18,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:17:18,327 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:17:18,327 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:17:18,527 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30536,565 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:17:18,527 INFO L428 AbstractCegarLoop]: === Iteration 571 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:17:18,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:17:18,527 INFO L82 PathProgramCache]: Analyzing trace with hash 416343379, now seen corresponding path program 565 times [2021-03-10 22:17:18,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:17:18,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857543788] [2021-03-10 22:17:18,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:17:18,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:17:18,913 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:17:18,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857543788] [2021-03-10 22:17:18,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989891928] [2021-03-10 22:17:18,914 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 566 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 566 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:17:19,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:17:19,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 22:17:19,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:17:19,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:17:19,323 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:19,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:17:19,329 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:19,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:17:19,336 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:19,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:17:19,342 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:19,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:17:19,349 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:19,471 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-03-10 22:17:19,472 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:17:19,477 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 6 treesize of output 2 [2021-03-10 22:17:19,479 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:19,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:17:19,486 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:19,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:17:19,492 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:19,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:17:19,499 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:19,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:17:19,505 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:19,612 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-03-10 22:17:19,612 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:17:19,614 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 22:17:19,614 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 3 variables, input treesize:164, output treesize:96 [2021-03-10 22:17:19,791 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2021-03-10 22:17:19,973 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:17:19,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:17:19,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-03-10 22:17:19,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626705569] [2021-03-10 22:17:19,974 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:17:19,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:17:19,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:17:19,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:17:19,974 INFO L87 Difference]: Start difference. First operand 153 states and 319 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:17:20,154 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 34 [2021-03-10 22:17:20,418 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 35 [2021-03-10 22:17:20,673 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 33 [2021-03-10 22:17:21,268 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 36 [2021-03-10 22:17:21,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:17:21,422 INFO L93 Difference]: Finished difference Result 187 states and 385 transitions. [2021-03-10 22:17:21,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 22:17:21,423 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:17:21,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:17:21,424 INFO L225 Difference]: With dead ends: 187 [2021-03-10 22:17:21,424 INFO L226 Difference]: Without dead ends: 175 [2021-03-10 22:17:21,424 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 1748.0ms TimeCoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:17:21,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-03-10 22:17:21,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 154. [2021-03-10 22:17:21,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.111111111111111) internal successors, (323), 153 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:17:21,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 323 transitions. [2021-03-10 22:17:21,425 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 323 transitions. Word has length 20 [2021-03-10 22:17:21,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:17:21,425 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 323 transitions. [2021-03-10 22:17:21,425 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:17:21,425 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 323 transitions. [2021-03-10 22:17:21,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:17:21,425 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:17:21,425 INFO L519 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:17:21,626 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 566 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30562 [2021-03-10 22:17:21,626 INFO L428 AbstractCegarLoop]: === Iteration 572 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:17:21,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:17:21,626 INFO L82 PathProgramCache]: Analyzing trace with hash 448290332, now seen corresponding path program 566 times [2021-03-10 22:17:21,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:17:21,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185753911] [2021-03-10 22:17:21,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:17:21,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:17:21,782 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:17:21,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185753911] [2021-03-10 22:17:21,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415461106] [2021-03-10 22:17:21,782 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 567 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 567 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:17:21,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:17:21,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:17:21,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 22:17:21,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:17:22,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:17:22,232 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:22,237 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:17:22,239 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:22,419 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2021-03-10 22:17:22,420 INFO L628 ElimStorePlain]: treesize reduction 87, result has 48.5 percent of original size [2021-03-10 22:17:22,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:17:22,426 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:22,492 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:17:22,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:17:22,499 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:22,563 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:17:22,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:17:22,569 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:22,631 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:17:22,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:17:22,638 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:22,698 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:17:22,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:17:22,705 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:22,762 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:17:22,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:17:22,768 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:22,823 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:17:22,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:17:22,829 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:22,883 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:17:22,885 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 22:17:22,885 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:199, output treesize:13 [2021-03-10 22:17:22,951 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 22:17:22,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:17:22,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-03-10 22:17:22,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927745959] [2021-03-10 22:17:22,951 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 22:17:22,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:17:22,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 22:17:22,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-03-10 22:17:22,952 INFO L87 Difference]: Start difference. First operand 154 states and 323 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:17:23,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:17:23,624 INFO L93 Difference]: Finished difference Result 183 states and 379 transitions. [2021-03-10 22:17:23,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 22:17:23,625 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:17:23,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:17:23,625 INFO L225 Difference]: With dead ends: 183 [2021-03-10 22:17:23,625 INFO L226 Difference]: Without dead ends: 183 [2021-03-10 22:17:23,626 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 608.9ms TimeCoverageRelationStatistics Valid=109, Invalid=541, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:17:23,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-03-10 22:17:23,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 153. [2021-03-10 22:17:23,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.098684210526316) internal successors, (319), 152 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:17:23,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 319 transitions. [2021-03-10 22:17:23,627 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 319 transitions. Word has length 20 [2021-03-10 22:17:23,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:17:23,627 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 319 transitions. [2021-03-10 22:17:23,627 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:17:23,627 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 319 transitions. [2021-03-10 22:17:23,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:17:23,627 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:17:23,627 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:17:23,827 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30586,567 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:17:23,828 INFO L428 AbstractCegarLoop]: === Iteration 573 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:17:23,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:17:23,828 INFO L82 PathProgramCache]: Analyzing trace with hash -1823873641, now seen corresponding path program 567 times [2021-03-10 22:17:23,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:17:23,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883518384] [2021-03-10 22:17:23,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:17:23,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:17:24,220 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:17:24,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883518384] [2021-03-10 22:17:24,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510823170] [2021-03-10 22:17:24,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 568 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 568 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:17:24,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 22:17:24,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:17:24,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 22:17:24,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:17:24,595 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 35 [2021-03-10 22:17:24,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:17:24,781 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:24,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:17:24,787 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:24,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:17:24,793 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:24,845 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:17:24,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:17:24,852 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:24,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:17:24,858 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:24,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:17:24,864 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:24,910 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:17:24,912 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:17:24,912 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:92, output treesize:56 [2021-03-10 22:17:25,073 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:17:25,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:17:25,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-03-10 22:17:25,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124370423] [2021-03-10 22:17:25,073 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:17:25,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:17:25,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:17:25,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:17:25,074 INFO L87 Difference]: Start difference. First operand 153 states and 319 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:17:25,609 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2021-03-10 22:17:25,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:17:25,647 INFO L93 Difference]: Finished difference Result 176 states and 357 transitions. [2021-03-10 22:17:25,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:17:25,649 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:17:25,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:17:25,649 INFO L225 Difference]: With dead ends: 176 [2021-03-10 22:17:25,649 INFO L226 Difference]: Without dead ends: 163 [2021-03-10 22:17:25,649 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 994.0ms TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:17:25,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-03-10 22:17:25,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 156. [2021-03-10 22:17:25,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.096774193548387) internal successors, (325), 155 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:17:25,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 325 transitions. [2021-03-10 22:17:25,650 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 325 transitions. Word has length 20 [2021-03-10 22:17:25,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:17:25,650 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 325 transitions. [2021-03-10 22:17:25,650 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:17:25,650 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 325 transitions. [2021-03-10 22:17:25,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:17:25,650 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:17:25,651 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:17:25,851 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 568 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30609 [2021-03-10 22:17:25,851 INFO L428 AbstractCegarLoop]: === Iteration 574 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:17:25,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:17:25,851 INFO L82 PathProgramCache]: Analyzing trace with hash 1991808979, now seen corresponding path program 568 times [2021-03-10 22:17:25,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:17:25,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730852677] [2021-03-10 22:17:25,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:17:25,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:17:26,236 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:17:26,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730852677] [2021-03-10 22:17:26,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828354651] [2021-03-10 22:17:26,236 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 569 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 569 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:17:26,382 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:17:26,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:17:26,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 22:17:26,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:17:26,623 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2021-03-10 22:17:26,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:17:26,751 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:26,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:17:26,757 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:26,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:17:26,764 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:26,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:17:26,770 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:26,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:17:26,777 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:26,903 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2021-03-10 22:17:26,903 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:17:26,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:17:26,910 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:26,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:17:26,917 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:26,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:17:26,924 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:26,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:17:26,930 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:26,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:17:26,937 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:27,040 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-03-10 22:17:27,041 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:17:27,043 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-03-10 22:17:27,043 INFO L247 ElimStorePlain]: Needed 11 recursive calls to eliminate 3 variables, input treesize:168, output treesize:100 [2021-03-10 22:17:27,214 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2021-03-10 22:17:27,393 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:17:27,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:17:27,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-03-10 22:17:27,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130009521] [2021-03-10 22:17:27,394 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:17:27,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:17:27,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:17:27,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:17:27,394 INFO L87 Difference]: Start difference. First operand 156 states and 325 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:17:28,140 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2021-03-10 22:17:28,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:17:28,321 INFO L93 Difference]: Finished difference Result 197 states and 391 transitions. [2021-03-10 22:17:28,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:17:28,323 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:17:28,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:17:28,323 INFO L225 Difference]: With dead ends: 197 [2021-03-10 22:17:28,323 INFO L226 Difference]: Without dead ends: 178 [2021-03-10 22:17:28,323 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 1337.3ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:17:28,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-03-10 22:17:28,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 155. [2021-03-10 22:17:28,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.0974025974025974) internal successors, (323), 154 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:17:28,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 323 transitions. [2021-03-10 22:17:28,324 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 323 transitions. Word has length 20 [2021-03-10 22:17:28,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:17:28,325 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 323 transitions. [2021-03-10 22:17:28,325 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:17:28,325 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 323 transitions. [2021-03-10 22:17:28,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:17:28,325 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:17:28,325 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:17:28,525 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 569 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30641 [2021-03-10 22:17:28,525 INFO L428 AbstractCegarLoop]: === Iteration 575 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:17:28,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:17:28,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1456579177, now seen corresponding path program 569 times [2021-03-10 22:17:28,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:17:28,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482438482] [2021-03-10 22:17:28,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:17:28,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:17:28,907 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:17:28,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482438482] [2021-03-10 22:17:28,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277940141] [2021-03-10 22:17:28,907 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 570 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 570 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:17:29,034 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 22:17:29,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:17:29,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 22:17:29,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:17:29,270 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2021-03-10 22:17:29,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:17:29,386 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:29,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:17:29,393 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:29,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:17:29,399 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:29,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:17:29,405 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:29,506 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2021-03-10 22:17:29,507 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:17:29,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:17:29,514 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:29,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:17:29,521 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:29,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:17:29,527 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:29,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:17:29,534 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:29,628 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:17:29,630 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:17:29,630 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 3 variables, input treesize:135, output treesize:79 [2021-03-10 22:17:29,912 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:17:29,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:17:29,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-03-10 22:17:29,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982994320] [2021-03-10 22:17:29,912 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 22:17:29,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:17:29,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 22:17:29,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-03-10 22:17:29,912 INFO L87 Difference]: Start difference. First operand 155 states and 323 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:17:30,580 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 41 [2021-03-10 22:17:31,088 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 36 [2021-03-10 22:17:31,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:17:31,263 INFO L93 Difference]: Finished difference Result 191 states and 393 transitions. [2021-03-10 22:17:31,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 22:17:31,265 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:17:31,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:17:31,265 INFO L225 Difference]: With dead ends: 191 [2021-03-10 22:17:31,265 INFO L226 Difference]: Without dead ends: 179 [2021-03-10 22:17:31,265 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1569.4ms TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:17:31,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-03-10 22:17:31,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 155. [2021-03-10 22:17:31,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.0974025974025974) internal successors, (323), 154 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:17:31,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 323 transitions. [2021-03-10 22:17:31,267 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 323 transitions. Word has length 20 [2021-03-10 22:17:31,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:17:31,267 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 323 transitions. [2021-03-10 22:17:31,267 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:17:31,267 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 323 transitions. [2021-03-10 22:17:31,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:17:31,267 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:17:31,267 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:17:31,467 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 570 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30673 [2021-03-10 22:17:31,467 INFO L428 AbstractCegarLoop]: === Iteration 576 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:17:31,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:17:31,467 INFO L82 PathProgramCache]: Analyzing trace with hash 2044324499, now seen corresponding path program 570 times [2021-03-10 22:17:31,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:17:31,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321219868] [2021-03-10 22:17:31,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:17:31,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:17:31,867 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:17:31,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321219868] [2021-03-10 22:17:31,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055092215] [2021-03-10 22:17:31,868 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 571 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 571 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:17:31,996 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 22:17:31,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:17:31,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 22:17:31,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:17:33,027 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:17:33,028 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:33,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:17:33,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:17:33,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-03-10 22:17:33,039 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:33,046 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:17:33,048 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:33,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:17:33,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:17:33,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:17:33,058 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:33,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:17:33,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:17:33,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:17:33,068 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:33,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:17:33,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:17:33,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:17:33,079 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:33,085 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:17:33,088 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:33,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:17:33,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:17:33,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:17:33,100 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:33,107 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:17:33,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:17:33,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-03-10 22:17:33,112 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:33,119 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:17:33,120 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:33,127 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:17:33,128 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:33,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:17:33,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:17:33,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:17:33,139 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:33,146 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:17:33,147 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:33,154 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:17:33,156 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:33,162 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:17:33,163 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:33,170 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:17:33,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:17:33,172 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:33,391 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2021-03-10 22:17:33,392 INFO L628 ElimStorePlain]: treesize reduction 18, result has 87.2 percent of original size [2021-03-10 22:17:33,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:17:33,399 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:33,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:17:33,407 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:33,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:17:33,415 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:33,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:17:33,422 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:33,518 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:17:33,520 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:17:33,520 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 5 variables, input treesize:709, output treesize:79 [2021-03-10 22:17:33,819 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:17:33,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:17:33,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-03-10 22:17:33,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76687685] [2021-03-10 22:17:33,820 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:17:33,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:17:33,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:17:33,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:17:33,820 INFO L87 Difference]: Start difference. First operand 155 states and 323 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:17:34,505 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2021-03-10 22:17:34,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:17:34,676 INFO L93 Difference]: Finished difference Result 196 states and 398 transitions. [2021-03-10 22:17:34,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:17:34,677 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:17:34,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:17:34,678 INFO L225 Difference]: With dead ends: 196 [2021-03-10 22:17:34,678 INFO L226 Difference]: Without dead ends: 177 [2021-03-10 22:17:34,678 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 1283.9ms TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-03-10 22:17:34,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-03-10 22:17:34,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 156. [2021-03-10 22:17:34,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.1032258064516127) internal successors, (326), 155 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:17:34,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 326 transitions. [2021-03-10 22:17:34,679 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 326 transitions. Word has length 20 [2021-03-10 22:17:34,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:17:34,679 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 326 transitions. [2021-03-10 22:17:34,679 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:17:34,679 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 326 transitions. [2021-03-10 22:17:34,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:17:34,680 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:17:34,680 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:17:34,880 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 571 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30701 [2021-03-10 22:17:34,880 INFO L428 AbstractCegarLoop]: === Iteration 577 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:17:34,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:17:34,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1100343233, now seen corresponding path program 571 times [2021-03-10 22:17:34,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:17:34,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483628901] [2021-03-10 22:17:34,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:17:34,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:17:35,068 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-03-10 22:17:35,433 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:17:35,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483628901] [2021-03-10 22:17:35,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994261747] [2021-03-10 22:17:35,433 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 572 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 572 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:17:35,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:17:35,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 22:17:35,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:17:35,832 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2021-03-10 22:17:36,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:17:36,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:17:36,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:17:36,866 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:36,871 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:17:36,872 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:36,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:17:36,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:17:36,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:17:36,881 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:36,885 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:17:36,887 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:37,016 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2021-03-10 22:17:37,017 INFO L628 ElimStorePlain]: treesize reduction 122, result has 32.2 percent of original size [2021-03-10 22:17:37,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:17:37,023 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:37,070 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:17:37,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:17:37,076 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:37,121 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:17:37,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:17:37,127 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:37,169 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:17:37,170 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:17:37,170 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 4 variables, input treesize:284, output treesize:46 [2021-03-10 22:17:37,346 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:17:37,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:17:37,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-03-10 22:17:37,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197918588] [2021-03-10 22:17:37,346 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 22:17:37,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:17:37,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 22:17:37,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:17:37,347 INFO L87 Difference]: Start difference. First operand 156 states and 326 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:17:38,099 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2021-03-10 22:17:38,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:17:38,279 INFO L93 Difference]: Finished difference Result 188 states and 379 transitions. [2021-03-10 22:17:38,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:17:38,280 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:17:38,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:17:38,280 INFO L225 Difference]: With dead ends: 188 [2021-03-10 22:17:38,280 INFO L226 Difference]: Without dead ends: 166 [2021-03-10 22:17:38,281 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1629.3ms TimeCoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-03-10 22:17:38,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-03-10 22:17:38,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 159. [2021-03-10 22:17:38,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.1012658227848102) internal successors, (332), 158 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) [2021-03-10 22:17:38,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 332 transitions. [2021-03-10 22:17:38,282 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 332 transitions. Word has length 20 [2021-03-10 22:17:38,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:17:38,282 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 332 transitions. [2021-03-10 22:17:38,282 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:17:38,282 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 332 transitions. [2021-03-10 22:17:38,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:17:38,282 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:17:38,282 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:17:38,482 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 572 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30790 [2021-03-10 22:17:38,483 INFO L428 AbstractCegarLoop]: === Iteration 578 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:17:38,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:17:38,483 INFO L82 PathProgramCache]: Analyzing trace with hash -798147579, now seen corresponding path program 572 times [2021-03-10 22:17:38,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:17:38,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184485373] [2021-03-10 22:17:38,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:17:38,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:17:38,669 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 31 [2021-03-10 22:17:39,001 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:17:39,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184485373] [2021-03-10 22:17:39,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618636680] [2021-03-10 22:17:39,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 573 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 573 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:17:39,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:17:39,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:17:39,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 22:17:39,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:17:39,387 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2021-03-10 22:17:40,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:17:40,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:17:40,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-03-10 22:17:40,215 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:40,219 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:17:40,221 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:40,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:17:40,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:17:40,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:17:40,229 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:40,233 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:17:40,234 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:40,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:17:40,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:17:40,241 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:40,365 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2021-03-10 22:17:40,365 INFO L628 ElimStorePlain]: treesize reduction 141, result has 30.2 percent of original size [2021-03-10 22:17:40,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:17:40,371 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:40,417 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:17:40,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:17:40,422 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:40,466 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:17:40,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:17:40,471 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:40,512 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:17:40,513 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:17:40,513 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 4 variables, input treesize:356, output treesize:46 [2021-03-10 22:17:40,687 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:17:40,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:17:40,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-03-10 22:17:40,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670083053] [2021-03-10 22:17:40,687 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 22:17:40,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:17:40,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 22:17:40,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:17:40,687 INFO L87 Difference]: Start difference. First operand 159 states and 332 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:17:40,850 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 34 [2021-03-10 22:17:41,640 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 53 [2021-03-10 22:17:41,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:17:41,765 INFO L93 Difference]: Finished difference Result 191 states and 386 transitions. [2021-03-10 22:17:41,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 22:17:41,766 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:17:41,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:17:41,767 INFO L225 Difference]: With dead ends: 191 [2021-03-10 22:17:41,767 INFO L226 Difference]: Without dead ends: 172 [2021-03-10 22:17:41,767 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1767.5ms TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:17:41,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-03-10 22:17:41,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 160. [2021-03-10 22:17:41,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.10062893081761) internal successors, (334), 159 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:17:41,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 334 transitions. [2021-03-10 22:17:41,768 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 334 transitions. Word has length 20 [2021-03-10 22:17:41,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:17:41,768 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 334 transitions. [2021-03-10 22:17:41,768 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:17:41,768 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 334 transitions. [2021-03-10 22:17:41,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:17:41,768 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:17:41,768 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:17:41,969 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30917,573 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:17:41,969 INFO L428 AbstractCegarLoop]: === Iteration 579 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:17:41,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:17:41,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1829220543, now seen corresponding path program 573 times [2021-03-10 22:17:41,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:17:41,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695656848] [2021-03-10 22:17:41,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:17:41,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:17:42,468 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:17:42,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695656848] [2021-03-10 22:17:42,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135022437] [2021-03-10 22:17:42,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 574 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 574 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:17:42,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:17:42,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:17:42,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 22:17:42,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:17:42,862 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2021-03-10 22:17:43,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:17:43,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:17:43,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2021-03-10 22:17:43,890 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:43,895 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:17:43,896 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:43,900 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:17:43,902 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:43,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:17:43,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:17:43,909 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:44,037 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 34 [2021-03-10 22:17:44,038 INFO L628 ElimStorePlain]: treesize reduction 109, result has 35.1 percent of original size [2021-03-10 22:17:44,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:17:44,044 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:44,091 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:17:44,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:17:44,096 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:44,141 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:17:44,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:17:44,146 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:44,187 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:17:44,189 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:17:44,189 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 4 variables, input treesize:284, output treesize:46 [2021-03-10 22:17:44,372 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:17:44,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:17:44,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-03-10 22:17:44,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665416877] [2021-03-10 22:17:44,372 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 22:17:44,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:17:44,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 22:17:44,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:17:44,372 INFO L87 Difference]: Start difference. First operand 160 states and 334 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:17:44,624 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 46 [2021-03-10 22:17:44,904 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2021-03-10 22:17:45,067 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35 [2021-03-10 22:17:45,675 WARN L205 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2021-03-10 22:17:45,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:17:45,760 INFO L93 Difference]: Finished difference Result 193 states and 391 transitions. [2021-03-10 22:17:45,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:17:45,762 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:17:45,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:17:45,762 INFO L225 Difference]: With dead ends: 193 [2021-03-10 22:17:45,762 INFO L226 Difference]: Without dead ends: 177 [2021-03-10 22:17:45,762 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 2073.0ms TimeCoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:17:45,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2021-03-10 22:17:45,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 161. [2021-03-10 22:17:45,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.1) internal successors, (336), 160 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:17:45,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 336 transitions. [2021-03-10 22:17:45,763 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 336 transitions. Word has length 20 [2021-03-10 22:17:45,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:17:45,764 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 336 transitions. [2021-03-10 22:17:45,764 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:17:45,764 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 336 transitions. [2021-03-10 22:17:45,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:17:45,764 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:17:45,764 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:17:45,975 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 574 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30992 [2021-03-10 22:17:45,975 INFO L428 AbstractCegarLoop]: === Iteration 580 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:17:45,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:17:45,975 INFO L82 PathProgramCache]: Analyzing trace with hash 492823685, now seen corresponding path program 574 times [2021-03-10 22:17:45,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:17:45,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376567599] [2021-03-10 22:17:45,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:17:45,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:17:46,544 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:17:46,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376567599] [2021-03-10 22:17:46,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830815229] [2021-03-10 22:17:46,545 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 575 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 575 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:17:46,681 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:17:46,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:17:46,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 22:17:46,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:17:48,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:17:48,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:17:48,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:17:48,008 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:48,013 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:17:48,014 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:48,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:17:48,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:17:48,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 2 [2021-03-10 22:17:48,023 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:48,027 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:17:48,029 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:48,170 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 35 [2021-03-10 22:17:48,170 INFO L628 ElimStorePlain]: treesize reduction 120, result has 33.3 percent of original size [2021-03-10 22:17:48,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:17:48,176 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:48,223 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:17:48,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:17:48,229 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:48,274 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:17:48,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:17:48,279 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:48,321 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:17:48,323 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:17:48,323 INFO L247 ElimStorePlain]: Needed 8 recursive calls to eliminate 4 variables, input treesize:284, output treesize:46 [2021-03-10 22:17:48,498 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:17:48,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:17:48,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-03-10 22:17:48,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969497234] [2021-03-10 22:17:48,498 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 22:17:48,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:17:48,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 22:17:48,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:17:48,498 INFO L87 Difference]: Start difference. First operand 161 states and 336 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:17:48,732 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 42 [2021-03-10 22:17:49,015 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 34 [2021-03-10 22:17:49,817 WARN L205 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 53 [2021-03-10 22:17:49,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:17:49,891 INFO L93 Difference]: Finished difference Result 191 states and 388 transitions. [2021-03-10 22:17:49,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:17:49,893 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:17:49,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:17:49,893 INFO L225 Difference]: With dead ends: 191 [2021-03-10 22:17:49,893 INFO L226 Difference]: Without dead ends: 178 [2021-03-10 22:17:49,893 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 2082.3ms TimeCoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-03-10 22:17:49,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-03-10 22:17:49,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 162. [2021-03-10 22:17:49,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 2.099378881987578) internal successors, (338), 161 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:17:49,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 338 transitions. [2021-03-10 22:17:49,894 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 338 transitions. Word has length 20 [2021-03-10 22:17:49,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:17:49,894 INFO L480 AbstractCegarLoop]: Abstraction has 162 states and 338 transitions. [2021-03-10 22:17:49,894 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:17:49,894 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 338 transitions. [2021-03-10 22:17:49,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:17:49,895 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:17:49,895 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:17:50,095 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31115,575 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:17:50,095 INFO L428 AbstractCegarLoop]: === Iteration 581 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:17:50,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:17:50,095 INFO L82 PathProgramCache]: Analyzing trace with hash 13539009, now seen corresponding path program 575 times [2021-03-10 22:17:50,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:17:50,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656668730] [2021-03-10 22:17:50,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:17:50,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:17:50,292 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2021-03-10 22:17:50,418 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 34 [2021-03-10 22:17:50,545 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 34 [2021-03-10 22:17:50,670 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 32 [2021-03-10 22:17:50,854 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:17:50,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656668730] [2021-03-10 22:17:50,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021550372] [2021-03-10 22:17:50,854 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 576 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 576 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:17:50,990 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 22:17:50,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:17:50,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 22:17:50,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:17:52,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:17:52,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:17:52,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:17:52,777 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:52,784 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:17:52,786 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:52,793 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:17:52,795 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:52,802 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:17:52,803 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:52,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:17:52,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-03-10 22:17:52,813 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:53,128 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 68 [2021-03-10 22:17:53,129 INFO L628 ElimStorePlain]: treesize reduction 496, result has 19.5 percent of original size [2021-03-10 22:17:53,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:17:53,136 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:53,235 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:17:53,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:17:53,242 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:53,338 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:17:53,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:17:53,345 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:53,438 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:17:53,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:17:53,445 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:53,538 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:17:53,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:17:53,545 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:53,632 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:17:53,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:17:53,639 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:53,724 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:17:53,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:17:53,730 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:53,811 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:17:53,813 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:17:53,813 INFO L247 ElimStorePlain]: Needed 13 recursive calls to eliminate 10 variables, input treesize:769, output treesize:73 [2021-03-10 22:17:54,128 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:17:54,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:17:54,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-03-10 22:17:54,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937006725] [2021-03-10 22:17:54,128 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 22:17:54,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:17:54,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 22:17:54,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:17:54,128 INFO L87 Difference]: Start difference. First operand 162 states and 338 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:17:55,197 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 28 [2021-03-10 22:17:55,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:17:55,408 INFO L93 Difference]: Finished difference Result 184 states and 378 transitions. [2021-03-10 22:17:55,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 22:17:55,409 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:17:55,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:17:55,409 INFO L225 Difference]: With dead ends: 184 [2021-03-10 22:17:55,410 INFO L226 Difference]: Without dead ends: 172 [2021-03-10 22:17:55,410 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 2047.2ms TimeCoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:17:55,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-03-10 22:17:55,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 158. [2021-03-10 22:17:55,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.1019108280254777) internal successors, (330), 157 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:17:55,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 330 transitions. [2021-03-10 22:17:55,411 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 330 transitions. Word has length 20 [2021-03-10 22:17:55,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:17:55,411 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 330 transitions. [2021-03-10 22:17:55,411 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:17:55,411 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 330 transitions. [2021-03-10 22:17:55,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:17:55,411 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:17:55,411 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:17:55,612 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 576 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31237 [2021-03-10 22:17:55,612 INFO L428 AbstractCegarLoop]: === Iteration 582 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:17:55,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:17:55,612 INFO L82 PathProgramCache]: Analyzing trace with hash 1384391087, now seen corresponding path program 576 times [2021-03-10 22:17:55,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:17:55,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557757155] [2021-03-10 22:17:55,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:17:55,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:17:56,073 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:17:56,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557757155] [2021-03-10 22:17:56,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410502656] [2021-03-10 22:17:56,073 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 577 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 577 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:17:56,205 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 22:17:56,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:17:56,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 22:17:56,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:17:56,626 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 43 [2021-03-10 22:17:57,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:17:57,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:17:57,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:17:57,587 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:57,593 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:17:57,595 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:57,601 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:17:57,603 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:57,609 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:17:57,611 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:57,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:17:57,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:17:57,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-03-10 22:17:57,621 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:57,627 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:17:57,628 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:57,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:17:57,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:17:57,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:17:57,638 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:57,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:17:57,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:17:57,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:17:57,647 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:57,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:17:57,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:17:57,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-03-10 22:17:57,657 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:57,663 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:17:57,665 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:57,670 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:17:57,672 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:57,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:17:57,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:17:57,679 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:57,804 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2021-03-10 22:17:57,805 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-03-10 22:17:57,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:17:57,812 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:57,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:17:57,818 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:57,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:17:57,824 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:17:57,875 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:17:57,876 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:17:57,877 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:467, output treesize:52 [2021-03-10 22:17:58,060 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:17:58,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:17:58,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-03-10 22:17:58,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755468258] [2021-03-10 22:17:58,061 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 22:17:58,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:17:58,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 22:17:58,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:17:58,061 INFO L87 Difference]: Start difference. First operand 158 states and 330 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:17:58,913 WARN L205 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 64 [2021-03-10 22:17:59,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:17:59,275 INFO L93 Difference]: Finished difference Result 191 states and 392 transitions. [2021-03-10 22:17:59,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 22:17:59,276 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:17:59,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:17:59,276 INFO L225 Difference]: With dead ends: 191 [2021-03-10 22:17:59,276 INFO L226 Difference]: Without dead ends: 172 [2021-03-10 22:17:59,276 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 1627.4ms TimeCoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:17:59,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-03-10 22:17:59,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 160. [2021-03-10 22:17:59,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.10062893081761) internal successors, (334), 159 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:17:59,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 334 transitions. [2021-03-10 22:17:59,278 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 334 transitions. Word has length 20 [2021-03-10 22:17:59,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:17:59,278 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 334 transitions. [2021-03-10 22:17:59,278 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:17:59,278 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 334 transitions. [2021-03-10 22:17:59,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:17:59,278 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:17:59,278 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:17:59,478 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31459,577 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:17:59,478 INFO L428 AbstractCegarLoop]: === Iteration 583 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:17:59,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:17:59,479 INFO L82 PathProgramCache]: Analyzing trace with hash 353318123, now seen corresponding path program 577 times [2021-03-10 22:17:59,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:17:59,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609720155] [2021-03-10 22:17:59,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:17:59,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:17:59,945 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:17:59,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609720155] [2021-03-10 22:17:59,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462130322] [2021-03-10 22:17:59,945 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 578 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 578 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:18:00,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:18:00,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 22:18:00,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:18:01,754 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:18:01,756 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:18:01,762 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:18:01,764 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:18:01,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:18:01,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:18:01,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:18:01,775 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:18:01,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:18:01,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:18:01,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-03-10 22:18:01,786 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:18:01,792 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:18:01,794 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:18:01,800 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:18:01,802 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:18:01,808 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:18:01,810 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:18:01,816 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:18:01,818 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:18:01,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:18:01,820 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:18:01,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:18:01,828 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:18:01,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-03-10 22:18:01,832 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:18:01,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:18:01,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:18:01,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:18:01,842 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:18:01,848 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:18:01,850 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:18:01,857 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:18:01,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:18:01,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-03-10 22:18:01,861 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:18:01,867 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:18:01,869 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:18:01,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:18:01,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:18:01,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:18:01,879 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:18:01,884 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:18:01,886 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:18:02,022 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2021-03-10 22:18:02,023 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-03-10 22:18:02,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:18:02,030 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:18:02,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:18:02,037 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:18:02,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:18:02,044 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:18:02,100 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:18:02,102 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:18:02,102 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 4 variables, input treesize:591, output treesize:52 [2021-03-10 22:18:02,304 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:18:02,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:18:02,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-03-10 22:18:02,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998914154] [2021-03-10 22:18:02,304 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 22:18:02,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:18:02,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 22:18:02,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:18:02,305 INFO L87 Difference]: Start difference. First operand 160 states and 334 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:18:03,205 WARN L205 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 57 [2021-03-10 22:18:03,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:18:03,503 INFO L93 Difference]: Finished difference Result 188 states and 386 transitions. [2021-03-10 22:18:03,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 22:18:03,504 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:18:03,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:18:03,504 INFO L225 Difference]: With dead ends: 188 [2021-03-10 22:18:03,504 INFO L226 Difference]: Without dead ends: 172 [2021-03-10 22:18:03,505 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 1665.9ms TimeCoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:18:03,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-03-10 22:18:03,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 161. [2021-03-10 22:18:03,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.1) internal successors, (336), 160 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:18:03,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 336 transitions. [2021-03-10 22:18:03,506 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 336 transitions. Word has length 20 [2021-03-10 22:18:03,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:18:03,506 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 336 transitions. [2021-03-10 22:18:03,506 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:18:03,506 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 336 transitions. [2021-03-10 22:18:03,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:18:03,506 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:18:03,506 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:18:03,706 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 578 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31605 [2021-03-10 22:18:03,707 INFO L428 AbstractCegarLoop]: === Iteration 584 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:18:03,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:18:03,707 INFO L82 PathProgramCache]: Analyzing trace with hash -1619604945, now seen corresponding path program 578 times [2021-03-10 22:18:03,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:18:03,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947610786] [2021-03-10 22:18:03,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:18:03,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:18:04,199 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:18:04,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947610786] [2021-03-10 22:18:04,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344662050] [2021-03-10 22:18:04,199 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 579 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 579 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:18:04,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 22:18:04,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:18:04,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 22:18:04,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:18:04,985 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2021-03-10 22:18:06,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:18:06,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:18:06,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:18:06,302 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:18:06,308 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:18:06,310 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:18:06,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:18:06,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:18:06,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:18:06,320 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:18:06,326 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:18:06,328 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:18:06,333 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:18:06,335 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:18:06,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:18:06,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:18:06,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-03-10 22:18:06,346 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:18:06,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:18:06,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:18:06,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:18:06,356 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:18:06,362 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:18:06,363 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:18:06,369 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:18:06,371 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:18:06,377 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:18:06,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:18:06,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:18:06,381 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:18:06,386 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:18:06,388 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:18:06,394 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:18:06,395 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:18:06,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:18:06,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:18:06,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2021-03-10 22:18:06,404 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:18:06,410 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:18:06,412 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:18:06,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:18:06,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-03-10 22:18:06,420 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:18:06,545 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2021-03-10 22:18:06,546 INFO L628 ElimStorePlain]: treesize reduction 14, result has 84.6 percent of original size [2021-03-10 22:18:06,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:18:06,553 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:18:06,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:18:06,560 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:18:06,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:18:06,568 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:18:06,618 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:18:06,620 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:18:06,620 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 4 variables, input treesize:591, output treesize:52 [2021-03-10 22:18:06,801 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:18:06,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:18:06,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-03-10 22:18:06,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219824963] [2021-03-10 22:18:06,802 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 22:18:06,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:18:06,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 22:18:06,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:18:06,802 INFO L87 Difference]: Start difference. First operand 161 states and 336 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:18:07,065 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 45 [2021-03-10 22:18:07,397 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 36 [2021-03-10 22:18:07,570 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2021-03-10 22:18:08,228 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2021-03-10 22:18:08,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:18:08,319 INFO L93 Difference]: Finished difference Result 191 states and 388 transitions. [2021-03-10 22:18:08,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:18:08,321 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:18:08,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:18:08,321 INFO L225 Difference]: With dead ends: 191 [2021-03-10 22:18:08,321 INFO L226 Difference]: Without dead ends: 178 [2021-03-10 22:18:08,321 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1944.3ms TimeCoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:18:08,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-03-10 22:18:08,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 162. [2021-03-10 22:18:08,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 2.099378881987578) internal successors, (338), 161 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:18:08,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 338 transitions. [2021-03-10 22:18:08,323 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 338 transitions. Word has length 20 [2021-03-10 22:18:08,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:18:08,323 INFO L480 AbstractCegarLoop]: Abstraction has 162 states and 338 transitions. [2021-03-10 22:18:08,323 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:18:08,323 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 338 transitions. [2021-03-10 22:18:08,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:18:08,323 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:18:08,323 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:18:08,523 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31803,579 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:18:08,523 INFO L428 AbstractCegarLoop]: === Iteration 585 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:18:08,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:18:08,523 INFO L82 PathProgramCache]: Analyzing trace with hash -2098889621, now seen corresponding path program 579 times [2021-03-10 22:18:08,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:18:08,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130647212] [2021-03-10 22:18:08,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:18:08,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:18:08,980 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:18:08,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130647212] [2021-03-10 22:18:08,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78858428] [2021-03-10 22:18:08,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 580 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 580 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:18:09,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 22:18:09,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:18:09,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 22:18:09,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:18:10,977 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:18:10,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:18:10,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:18:10,981 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:18:10,988 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:18:10,989 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:18:10,997 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:18:10,998 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:18:11,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:18:11,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:18:11,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-03-10 22:18:11,009 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:18:11,016 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:18:11,018 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:18:11,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-03-10 22:18:11,021 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:18:11,027 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:18:11,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:18:11,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:18:11,031 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:18:11,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:18:11,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:18:11,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 2 [2021-03-10 22:18:11,041 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:18:11,047 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:18:11,049 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:18:11,056 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:18:11,057 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:18:11,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:18:11,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:18:11,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:18:11,068 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:18:11,075 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:18:11,077 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:18:11,083 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:18:11,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:18:11,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:18:11,087 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:18:11,093 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:18:11,095 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:18:11,101 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:18:11,103 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:18:11,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:18:11,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:18:11,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:18:11,112 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:18:11,119 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:18:11,120 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-03-10 22:18:11,337 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 64 [2021-03-10 22:18:11,338 INFO L628 ElimStorePlain]: treesize reduction 18, result has 87.2 percent of original size [2021-03-10 22:18:11,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:18:11,346 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-03-10 22:18:11,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:18:11,353 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-03-10 22:18:11,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:18:11,360 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-03-10 22:18:11,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 4 treesize of output 2 [2021-03-10 22:18:11,367 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-03-10 22:18:11,458 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:18:11,460 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-03-10 22:18:11,460 INFO L247 ElimStorePlain]: Needed 21 recursive calls to eliminate 5 variables, input treesize:709, output treesize:79 [2021-03-10 22:18:11,778 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:18:11,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:18:11,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-03-10 22:18:11,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260451233] [2021-03-10 22:18:11,778 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 22:18:11,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:18:11,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 22:18:11,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-03-10 22:18:11,778 INFO L87 Difference]: Start difference. First operand 162 states and 338 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:18:12,771 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2021-03-10 22:18:12,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:18:12,976 INFO L93 Difference]: Finished difference Result 184 states and 378 transitions. [2021-03-10 22:18:12,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 22:18:12,977 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:18:12,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:18:12,977 INFO L225 Difference]: With dead ends: 184 [2021-03-10 22:18:12,977 INFO L226 Difference]: Without dead ends: 172 [2021-03-10 22:18:12,977 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1588.0ms TimeCoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-03-10 22:18:12,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-03-10 22:18:12,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 159. [2021-03-10 22:18:12,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.1012658227848102) internal successors, (332), 158 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) [2021-03-10 22:18:12,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 332 transitions. [2021-03-10 22:18:12,979 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 332 transitions. Word has length 20 [2021-03-10 22:18:12,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:18:12,979 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 332 transitions. [2021-03-10 22:18:12,979 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:18:12,979 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 332 transitions. [2021-03-10 22:18:12,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:18:12,979 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:18:12,979 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:18:13,179 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31975,580 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:18:13,179 INFO L428 AbstractCegarLoop]: === Iteration 586 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:18:13,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:18:13,180 INFO L82 PathProgramCache]: Analyzing trace with hash 1393553921, now seen corresponding path program 580 times [2021-03-10 22:18:13,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:18:13,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855434599] [2021-03-10 22:18:13,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:18:13,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:18:13,622 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:18:13,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855434599] [2021-03-10 22:18:13,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690390286] [2021-03-10 22:18:13,622 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 581 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 581 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:18:13,751 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 22:18:13,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:18:13,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 22:18:13,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:18:15,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:18:15,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:18:15,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:18:15,085 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:18:15,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:18:15,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:18:15,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-03-10 22:18:15,096 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:18:15,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:18:15,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:18:15,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:18:15,106 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:18:15,112 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:18:15,114 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:18:15,120 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:18:15,121 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:18:15,128 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:18:15,129 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:18:15,136 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:18:15,137 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:18:15,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:18:15,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:18:15,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:18:15,147 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:18:15,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:18:15,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:18:15,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-03-10 22:18:15,159 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:18:15,165 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:18:15,166 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:18:15,172 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:18:15,174 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:18:15,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:18:15,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:18:15,182 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:18:15,325 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2021-03-10 22:18:15,325 INFO L628 ElimStorePlain]: treesize reduction 14, result has 86.5 percent of original size [2021-03-10 22:18:15,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 1 [2021-03-10 22:18:15,332 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:18:15,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:18:15,339 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:18:15,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:18:15,346 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:18:15,406 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:18:15,408 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:18:15,408 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:521, output treesize:62 [2021-03-10 22:18:15,659 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:18:15,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:18:15,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-03-10 22:18:15,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298134225] [2021-03-10 22:18:15,660 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:18:15,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:18:15,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:18:15,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:18:15,660 INFO L87 Difference]: Start difference. First operand 159 states and 332 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:18:15,791 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2021-03-10 22:18:16,449 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2021-03-10 22:18:16,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:18:16,544 INFO L93 Difference]: Finished difference Result 184 states and 373 transitions. [2021-03-10 22:18:16,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 22:18:16,545 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:18:16,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:18:16,546 INFO L225 Difference]: With dead ends: 184 [2021-03-10 22:18:16,546 INFO L226 Difference]: Without dead ends: 168 [2021-03-10 22:18:16,546 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1320.8ms TimeCoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-03-10 22:18:16,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-03-10 22:18:16,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 161. [2021-03-10 22:18:16,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.1) internal successors, (336), 160 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:18:16,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 336 transitions. [2021-03-10 22:18:16,547 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 336 transitions. Word has length 20 [2021-03-10 22:18:16,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:18:16,547 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 336 transitions. [2021-03-10 22:18:16,547 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:18:16,547 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 336 transitions. [2021-03-10 22:18:16,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:18:16,547 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:18:16,547 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:18:16,748 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32102,581 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:18:16,748 INFO L428 AbstractCegarLoop]: === Iteration 587 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:18:16,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:18:16,748 INFO L82 PathProgramCache]: Analyzing trace with hash -579369147, now seen corresponding path program 581 times [2021-03-10 22:18:16,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:18:16,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768706499] [2021-03-10 22:18:16,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:18:16,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:18:17,200 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:18:17,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768706499] [2021-03-10 22:18:17,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293286952] [2021-03-10 22:18:17,200 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 582 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 582 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:18:17,330 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 22:18:17,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:18:17,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 22:18:17,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:18:17,654 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2021-03-10 22:18:18,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:18:18,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:18:18,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:18:18,691 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 22:18:18,697 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:18:18,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:18:18,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:18:18,701 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-03-10 22:18:18,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:18:18,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:18:18,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 1 [2021-03-10 22:18:18,710 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-03-10 22:18:18,716 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:18:18,717 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-03-10 22:18:18,723 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:18:18,724 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-03-10 22:18:18,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:18:18,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:18:18,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 2 [2021-03-10 22:18:18,735 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-03-10 22:18:18,740 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:18:18,742 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-03-10 22:18:18,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:18:18,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:18:18,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2021-03-10 22:18:18,752 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-03-10 22:18:18,758 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:18:18,759 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-03-10 22:18:18,765 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:18:18,766 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-03-10 22:18:18,770 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-03-10 22:18:18,772 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-03-10 22:18:18,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 22:18:18,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-03-10 22:18:18,779 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-03-10 22:18:18,921 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 49 [2021-03-10 22:18:18,921 INFO L628 ElimStorePlain]: treesize reduction 14, result has 86.5 percent of original size [2021-03-10 22:18:18,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 3 treesize of output 1 [2021-03-10 22:18:18,928 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-03-10 22:18:18,932 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 5 treesize of output 1 [2021-03-10 22:18:18,935 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-03-10 22:18:18,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 2 [2021-03-10 22:18:18,941 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-03-10 22:18:19,000 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 22:18:19,002 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-03-10 22:18:19,002 INFO L247 ElimStorePlain]: Needed 16 recursive calls to eliminate 4 variables, input treesize:521, output treesize:62 [2021-03-10 22:18:19,256 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:18:19,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 22:18:19,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-03-10 22:18:19,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931408227] [2021-03-10 22:18:19,256 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 22:18:19,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 22:18:19,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 22:18:19,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-03-10 22:18:19,256 INFO L87 Difference]: Start difference. First operand 161 states and 336 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:18:19,432 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 35 [2021-03-10 22:18:19,808 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 54 [2021-03-10 22:18:20,096 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2021-03-10 22:18:20,703 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 60 [2021-03-10 22:18:20,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 22:18:20,929 INFO L93 Difference]: Finished difference Result 194 states and 397 transitions. [2021-03-10 22:18:20,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 22:18:20,930 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 22:18:20,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 22:18:20,930 INFO L225 Difference]: With dead ends: 194 [2021-03-10 22:18:20,930 INFO L226 Difference]: Without dead ends: 181 [2021-03-10 22:18:20,931 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 2145.9ms TimeCoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2021-03-10 22:18:20,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-03-10 22:18:20,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 162. [2021-03-10 22:18:20,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 2.099378881987578) internal successors, (338), 161 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:18:20,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 338 transitions. [2021-03-10 22:18:20,932 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 338 transitions. Word has length 20 [2021-03-10 22:18:20,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 22:18:20,932 INFO L480 AbstractCegarLoop]: Abstraction has 162 states and 338 transitions. [2021-03-10 22:18:20,932 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 22:18:20,932 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 338 transitions. [2021-03-10 22:18:20,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 22:18:20,932 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 22:18:20,932 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 22:18:21,132 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 582 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32242 [2021-03-10 22:18:21,133 INFO L428 AbstractCegarLoop]: === Iteration 588 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 22:18:21,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 22:18:21,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1058653823, now seen corresponding path program 582 times [2021-03-10 22:18:21,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 22:18:21,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892273996] [2021-03-10 22:18:21,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 22:18:21,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 22:18:21,691 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 22:18:21,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892273996] [2021-03-10 22:18:21,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914215057] [2021-03-10 22:18:21,692 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 583 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 583 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 22:18:21,824 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 22:18:21,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 22:18:21,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 22:18:21,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 22:18:22,150 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 Received shutdown request... [2021-03-10 22:18:23,423 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 583 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32324 [2021-03-10 22:18:23,423 WARN L545 AbstractCegarLoop]: Verification canceled [2021-03-10 22:18:23,426 WARN L224 ceAbstractionStarter]: Timeout [2021-03-10 22:18:23,426 INFO L202 PluginConnector]: Adding new model nzb-file-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.03 10:18:23 BasicIcfg [2021-03-10 22:18:23,426 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-10 22:18:23,427 INFO L168 Benchmark]: Toolchain (without parser) took 874627.24 ms. Allocated memory was 255.9 MB in the beginning and 534.8 MB in the end (delta: 278.9 MB). Free memory was 236.3 MB in the beginning and 227.0 MB in the end (delta: 9.3 MB). Peak memory consumption was 324.6 MB. Max. memory is 16.0 GB. [2021-03-10 22:18:23,427 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.08 ms. Allocated memory is still 255.9 MB. Free memory is still 237.6 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-03-10 22:18:23,427 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.95 ms. Allocated memory is still 255.9 MB. Free memory was 235.7 MB in the beginning and 234.2 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-10 22:18:23,427 INFO L168 Benchmark]: Boogie Preprocessor took 27.08 ms. Allocated memory is still 255.9 MB. Free memory was 234.2 MB in the beginning and 233.2 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-10 22:18:23,427 INFO L168 Benchmark]: RCFGBuilder took 414.10 ms. Allocated memory is still 255.9 MB. Free memory was 233.2 MB in the beginning and 223.0 MB in the end (delta: 10.2 MB). Peak memory consumption was 21.7 MB. Max. memory is 16.0 GB. [2021-03-10 22:18:23,427 INFO L168 Benchmark]: TraceAbstraction took 874152.35 ms. Allocated memory was 255.9 MB in the beginning and 534.8 MB in the end (delta: 278.9 MB). Free memory was 222.3 MB in the beginning and 227.0 MB in the end (delta: -4.7 MB). Peak memory consumption was 309.2 MB. Max. memory is 16.0 GB. [2021-03-10 22:18:23,427 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.08 ms. Allocated memory is still 255.9 MB. Free memory is still 237.6 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 26.95 ms. Allocated memory is still 255.9 MB. Free memory was 235.7 MB in the beginning and 234.2 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 27.08 ms. Allocated memory is still 255.9 MB. Free memory was 234.2 MB in the beginning and 233.2 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 414.10 ms. Allocated memory is still 255.9 MB. Free memory was 233.2 MB in the beginning and 223.0 MB in the end (delta: 10.2 MB). Peak memory consumption was 21.7 MB. Max. memory is 16.0 GB. * TraceAbstraction took 874152.35 ms. Allocated memory was 255.9 MB in the beginning and 534.8 MB in the end (delta: 278.9 MB). Free memory was 222.3 MB in the beginning and 227.0 MB in the end (delta: -4.7 MB). Peak memory consumption was 309.2 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 100]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 100). Cancelled while BasicCegarLoop was analyzing trace of length 21 with TraceHistMax 4,while TraceCheckSpWp was constructing forward predicates,while QuantifierPusher was running 1 iterations of DualJunctionQuantifierElimination. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 874063.8ms, OverallIterations: 588, TraceHistogramMax: 5, EmptinessCheckTime: 129.8ms, AutomataDifference: 275310.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 14.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 16560 SDtfs, 22179 SDslu, 109206 SDs, 0 SdLazy, 161606 SolverSat, 8877 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 72613.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 19771 GetRequests, 7120 SyntacticMatches, 1063 SemanticMatches, 11588 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42728 ImplicationChecksByTransitivity, 347664.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=172occurred in iteration=311, InterpolantAutomatonStates: 8637, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 868.1ms AutomataMinimizationTime, 587 MinimizatonAttempts, 17053 StatesRemovedByMinimization, 582 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 2669.6ms SsaConstructionTime, 8013.1ms SatisfiabilityAnalysisTime, 428292.5ms InterpolantComputationTime, 21215 NumberOfCodeBlocks, 21215 NumberOfCodeBlocksAsserted, 2106 NumberOfCheckSat, 20047 ConstructedInterpolants, 965 QuantifiedInterpolants, 308831 SizeOfPredicates, 3116 NumberOfNonLiveVariables, 52172 ConjunctsInSsa, 14404 ConjunctsInUnsatCore, 1168 InterpolantComputations, 6 PerfectInterpolantSequences, 2079/15480 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown