/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/mult-comm.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a47a088281b0b97d17910950432b7c5b5bc3adeb-a47a088 [2021-07-13 19:12:10,828 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-13 19:12:10,830 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-13 19:12:10,868 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-13 19:12:10,937 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 [2021-07-13 19:12:10,974 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-13 19:12:10,975 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-13 19:12:10,975 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-13 19:12:10,975 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-13 19:12:10,978 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-13 19:12:10,978 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-13 19:12:10,978 INFO L138 SettingsManager]: * Use SBE=true [2021-07-13 19:12:10,978 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-13 19:12:10,978 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-13 19:12:10,979 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-13 19:12:10,979 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-13 19:12:10,979 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-13 19:12:10,980 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-13 19:12:10,980 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-13 19:12:10,980 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-13 19:12:10,980 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-13 19:12:10,980 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-13 19:12:10,980 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-13 19:12:10,980 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-13 19:12:10,980 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-13 19:12:10,981 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-13 19:12:10,981 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-13 19:12:10,981 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-13 19:12:10,981 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 19:12:10,981 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-13 19:12:10,981 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-13 19:12:10,981 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-13 19:12:10,982 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-13 19:12:10,982 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-13 19:12:10,982 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-13 19:12:10,982 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-13 19:12:10,982 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-13 19:12:11,320 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-13 19:12:11,338 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-13 19:12:11,340 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-13 19:12:11,341 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-13 19:12:11,342 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-13 19:12:11,343 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/mult-comm.wvr.bpl [2021-07-13 19:12:11,343 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/mult-comm.wvr.bpl' [2021-07-13 19:12:11,363 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-13 19:12:11,364 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-13 19:12:11,365 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-13 19:12:11,365 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-13 19:12:11,366 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-13 19:12:11,377 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:12:11" (1/1) ... [2021-07-13 19:12:11,383 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:12:11" (1/1) ... [2021-07-13 19:12:11,389 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-13 19:12:11,390 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-13 19:12:11,390 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-13 19:12:11,390 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-13 19:12:11,397 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:12:11" (1/1) ... [2021-07-13 19:12:11,398 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:12:11" (1/1) ... [2021-07-13 19:12:11,398 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:12:11" (1/1) ... [2021-07-13 19:12:11,398 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:12:11" (1/1) ... [2021-07-13 19:12:11,400 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:12:11" (1/1) ... [2021-07-13 19:12:11,403 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:12:11" (1/1) ... [2021-07-13 19:12:11,403 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:12:11" (1/1) ... [2021-07-13 19:12:11,404 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-13 19:12:11,405 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-13 19:12:11,405 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-13 19:12:11,405 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-13 19:12:11,407 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:12:11" (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 [2021-07-13 19:12:11,457 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-13 19:12:11,457 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-13 19:12:11,457 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-13 19:12:11,458 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-13 19:12:11,458 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-13 19:12:11,458 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-13 19:12:11,458 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-13 19:12:11,458 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-13 19:12:11,458 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-13 19:12:11,459 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-13 19:12:11,629 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-13 19:12:11,630 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-07-13 19:12:11,631 INFO L202 PluginConnector]: Adding new model mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 07:12:11 BoogieIcfgContainer [2021-07-13 19:12:11,632 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-13 19:12:11,633 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-13 19:12:11,633 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-13 19:12:11,636 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-13 19:12:11,636 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:12:11" (1/2) ... [2021-07-13 19:12:11,637 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a407a6d and model type mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 07:12:11, skipping insertion in model container [2021-07-13 19:12:11,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mult-comm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 07:12:11" (2/2) ... [2021-07-13 19:12:11,638 INFO L111 eAbstractionObserver]: Analyzing ICFG mult-comm.wvr.bpl [2021-07-13 19:12:11,659 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-13 19:12:11,659 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-13 19:12:11,660 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-13 19:12:11,660 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-13 19:12:11,723 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-07-13 19:12:11,756 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-07-13 19:12:11,805 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-13 19:12:11,805 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-13 19:12:11,805 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-13 19:12:11,805 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-13 19:12:11,805 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-13 19:12:11,805 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-13 19:12:11,805 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-13 19:12:11,806 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-13 19:12:11,813 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 24 places, 19 transitions, 54 flow [2021-07-13 19:12:11,832 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 29 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:11,834 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:11,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-07-13 19:12:11,840 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:11,840 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:11,841 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:11,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:11,847 INFO L82 PathProgramCache]: Analyzing trace with hash -538755822, now seen corresponding path program 1 times [2021-07-13 19:12:11,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:11,855 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906969626] [2021-07-13 19:12:11,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:11,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:12,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:12,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:12,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906969626] [2021-07-13 19:12:12,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906969626] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:12:12,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:12:12,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-07-13 19:12:12,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940886612] [2021-07-13 19:12:12,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-13 19:12:12,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:12,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-13 19:12:12,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 19:12:12,035 INFO L87 Difference]: Start difference. First operand has 29 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 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 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 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) [2021-07-13 19:12:12,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:12,087 INFO L93 Difference]: Finished difference Result 54 states and 102 transitions. [2021-07-13 19:12:12,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-13 19:12:12,089 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 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 [2021-07-13 19:12:12,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:12,099 INFO L225 Difference]: With dead ends: 54 [2021-07-13 19:12:12,099 INFO L226 Difference]: Without dead ends: 47 [2021-07-13 19:12:12,101 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-13 19:12:12,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-07-13 19:12:12,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 38. [2021-07-13 19:12:12,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.9189189189189189) internal successors, (71), 37 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:12,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 71 transitions. [2021-07-13 19:12:12,148 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 71 transitions. Word has length 11 [2021-07-13 19:12:12,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:12,150 INFO L482 AbstractCegarLoop]: Abstraction has 38 states and 71 transitions. [2021-07-13 19:12:12,150 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 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) [2021-07-13 19:12:12,151 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 71 transitions. [2021-07-13 19:12:12,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-13 19:12:12,153 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:12,153 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:12,154 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-13 19:12:12,154 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:12,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:12,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1263691540, now seen corresponding path program 1 times [2021-07-13 19:12:12,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:12,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509372008] [2021-07-13 19:12:12,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:12,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:12,352 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:12,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:12,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509372008] [2021-07-13 19:12:12,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509372008] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:12,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616815050] [2021-07-13 19:12:12,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:12,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:12,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:12:12,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:12,532 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:12,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616815050] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:12,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:12,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-07-13 19:12:12,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963468574] [2021-07-13 19:12:12,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:12:12,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:12,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:12:12,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:12:12,536 INFO L87 Difference]: Start difference. First operand 38 states and 71 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 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) [2021-07-13 19:12:12,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:12,668 INFO L93 Difference]: Finished difference Result 65 states and 125 transitions. [2021-07-13 19:12:12,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:12:12,668 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 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 13 [2021-07-13 19:12:12,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:12,670 INFO L225 Difference]: With dead ends: 65 [2021-07-13 19:12:12,670 INFO L226 Difference]: Without dead ends: 47 [2021-07-13 19:12:12,679 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 185.8ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:12:12,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-07-13 19:12:12,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 36. [2021-07-13 19:12:12,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.9428571428571428) internal successors, (68), 35 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:12,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 68 transitions. [2021-07-13 19:12:12,684 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 68 transitions. Word has length 13 [2021-07-13 19:12:12,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:12,685 INFO L482 AbstractCegarLoop]: Abstraction has 36 states and 68 transitions. [2021-07-13 19:12:12,685 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 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) [2021-07-13 19:12:12,685 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 68 transitions. [2021-07-13 19:12:12,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-13 19:12:12,686 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:12,686 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:12,893 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-07-13 19:12:12,893 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:12,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:12,894 INFO L82 PathProgramCache]: Analyzing trace with hash -1006944620, now seen corresponding path program 1 times [2021-07-13 19:12:12,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:12,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099789733] [2021-07-13 19:12:12,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:12,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:12,966 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:12,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:12,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099789733] [2021-07-13 19:12:12,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099789733] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:12,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652533171] [2021-07-13 19:12:12,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-07-13 19:12:13,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:13,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:12:13,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:13,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:13,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652533171] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:13,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:13,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-07-13 19:12:13,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258968424] [2021-07-13 19:12:13,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 19:12:13,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:13,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 19:12:13,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-07-13 19:12:13,120 INFO L87 Difference]: Start difference. First operand 36 states and 68 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 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) [2021-07-13 19:12:13,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:13,156 INFO L93 Difference]: Finished difference Result 52 states and 94 transitions. [2021-07-13 19:12:13,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-13 19:12:13,156 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-07-13 19:12:13,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:13,157 INFO L225 Difference]: With dead ends: 52 [2021-07-13 19:12:13,157 INFO L226 Difference]: Without dead ends: 39 [2021-07-13 19:12:13,157 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 58.9ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:12:13,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-07-13 19:12:13,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2021-07-13 19:12:13,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.9189189189189189) internal successors, (71), 37 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:13,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 71 transitions. [2021-07-13 19:12:13,164 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 71 transitions. Word has length 13 [2021-07-13 19:12:13,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:13,164 INFO L482 AbstractCegarLoop]: Abstraction has 38 states and 71 transitions. [2021-07-13 19:12:13,164 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 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) [2021-07-13 19:12:13,164 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 71 transitions. [2021-07-13 19:12:13,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-07-13 19:12:13,165 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:13,165 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:13,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:13,388 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:13,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:13,389 INFO L82 PathProgramCache]: Analyzing trace with hash 689628820, now seen corresponding path program 2 times [2021-07-13 19:12:13,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:13,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321453689] [2021-07-13 19:12:13,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:13,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:13,524 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:13,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:13,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321453689] [2021-07-13 19:12:13,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321453689] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:13,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322485051] [2021-07-13 19:12:13,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2021-07-13 19:12:13,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:12:13,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:13,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:12:13,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:13,676 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:13,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322485051] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:13,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:13,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-07-13 19:12:13,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282369073] [2021-07-13 19:12:13,677 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:12:13,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:13,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:12:13,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:12:13,679 INFO L87 Difference]: Start difference. First operand 38 states and 71 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 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) [2021-07-13 19:12:13,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:13,771 INFO L93 Difference]: Finished difference Result 64 states and 122 transitions. [2021-07-13 19:12:13,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:12:13,772 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 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 13 [2021-07-13 19:12:13,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:13,773 INFO L225 Difference]: With dead ends: 64 [2021-07-13 19:12:13,773 INFO L226 Difference]: Without dead ends: 53 [2021-07-13 19:12:13,773 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 150.9ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:12:13,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-07-13 19:12:13,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 47. [2021-07-13 19:12:13,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:13,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 89 transitions. [2021-07-13 19:12:13,778 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 89 transitions. Word has length 13 [2021-07-13 19:12:13,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:13,779 INFO L482 AbstractCegarLoop]: Abstraction has 47 states and 89 transitions. [2021-07-13 19:12:13,779 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 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) [2021-07-13 19:12:13,779 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 89 transitions. [2021-07-13 19:12:13,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:12:13,779 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:13,780 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:13,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:13,993 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:13,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:13,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1751181162, now seen corresponding path program 2 times [2021-07-13 19:12:13,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:13,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386969348] [2021-07-13 19:12:13,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:14,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:14,133 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:14,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:14,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386969348] [2021-07-13 19:12:14,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386969348] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:14,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214486582] [2021-07-13 19:12:14,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2021-07-13 19:12:14,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:12:14,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:14,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:12:14,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:14,285 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:14,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214486582] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:14,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:14,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-07-13 19:12:14,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563794302] [2021-07-13 19:12:14,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:12:14,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:14,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:12:14,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:12:14,295 INFO L87 Difference]: Start difference. First operand 47 states and 89 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:14,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:14,460 INFO L93 Difference]: Finished difference Result 73 states and 140 transitions. [2021-07-13 19:12:14,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 19:12:14,461 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-07-13 19:12:14,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:14,464 INFO L225 Difference]: With dead ends: 73 [2021-07-13 19:12:14,464 INFO L226 Difference]: Without dead ends: 60 [2021-07-13 19:12:14,464 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 186.4ms TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:12:14,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-07-13 19:12:14,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 49. [2021-07-13 19:12:14,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.9583333333333333) internal successors, (94), 48 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:14,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 94 transitions. [2021-07-13 19:12:14,469 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 94 transitions. Word has length 15 [2021-07-13 19:12:14,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:14,469 INFO L482 AbstractCegarLoop]: Abstraction has 49 states and 94 transitions. [2021-07-13 19:12:14,469 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:14,469 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 94 transitions. [2021-07-13 19:12:14,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:12:14,470 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:14,470 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:14,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:14,685 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:14,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:14,686 INFO L82 PathProgramCache]: Analyzing trace with hash 273149974, now seen corresponding path program 1 times [2021-07-13 19:12:14,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:14,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176583639] [2021-07-13 19:12:14,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:14,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:14,796 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:14,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:14,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176583639] [2021-07-13 19:12:14,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176583639] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:14,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261148391] [2021-07-13 19:12:14,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-07-13 19:12:14,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:14,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:12:14,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:15,077 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:15,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261148391] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:15,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:15,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-13 19:12:15,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074279600] [2021-07-13 19:12:15,078 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:12:15,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:15,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:12:15,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:12:15,079 INFO L87 Difference]: Start difference. First operand 49 states and 94 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:15,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:15,246 INFO L93 Difference]: Finished difference Result 69 states and 126 transitions. [2021-07-13 19:12:15,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:12:15,247 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have 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 [2021-07-13 19:12:15,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:15,248 INFO L225 Difference]: With dead ends: 69 [2021-07-13 19:12:15,248 INFO L226 Difference]: Without dead ends: 62 [2021-07-13 19:12:15,248 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 278.1ms TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:12:15,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-07-13 19:12:15,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 53. [2021-07-13 19:12:15,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.9230769230769231) internal successors, (100), 52 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) [2021-07-13 19:12:15,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 100 transitions. [2021-07-13 19:12:15,253 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 100 transitions. Word has length 15 [2021-07-13 19:12:15,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:15,253 INFO L482 AbstractCegarLoop]: Abstraction has 53 states and 100 transitions. [2021-07-13 19:12:15,253 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:15,253 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 100 transitions. [2021-07-13 19:12:15,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:12:15,254 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:15,254 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:15,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-07-13 19:12:15,465 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:15,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:15,465 INFO L82 PathProgramCache]: Analyzing trace with hash -109570414, now seen corresponding path program 2 times [2021-07-13 19:12:15,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:15,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349357327] [2021-07-13 19:12:15,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:15,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:15,588 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:15,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:15,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349357327] [2021-07-13 19:12:15,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349357327] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:15,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830896630] [2021-07-13 19:12:15,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2021-07-13 19:12:15,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:12:15,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:15,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:12:15,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:15,834 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:15,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830896630] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:15,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:15,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-13 19:12:15,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439943352] [2021-07-13 19:12:15,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:12:15,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:15,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:12:15,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:12:15,836 INFO L87 Difference]: Start difference. First operand 53 states and 100 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:16,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:16,004 INFO L93 Difference]: Finished difference Result 73 states and 134 transitions. [2021-07-13 19:12:16,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:12:16,004 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have 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 [2021-07-13 19:12:16,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:16,005 INFO L225 Difference]: With dead ends: 73 [2021-07-13 19:12:16,005 INFO L226 Difference]: Without dead ends: 66 [2021-07-13 19:12:16,006 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 244.5ms TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:12:16,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-07-13 19:12:16,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2021-07-13 19:12:16,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.9433962264150944) internal successors, (103), 53 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:16,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 103 transitions. [2021-07-13 19:12:16,010 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 103 transitions. Word has length 15 [2021-07-13 19:12:16,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:16,010 INFO L482 AbstractCegarLoop]: Abstraction has 54 states and 103 transitions. [2021-07-13 19:12:16,010 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:16,010 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 103 transitions. [2021-07-13 19:12:16,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:12:16,011 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:16,011 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:16,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:16,236 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:16,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:16,236 INFO L82 PathProgramCache]: Analyzing trace with hash 1969723414, now seen corresponding path program 3 times [2021-07-13 19:12:16,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:16,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950349810] [2021-07-13 19:12:16,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:16,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:16,332 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:16,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:16,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950349810] [2021-07-13 19:12:16,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950349810] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:16,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202624868] [2021-07-13 19:12:16,332 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:16,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:12:16,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:16,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:12:16,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:16,602 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:16,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202624868] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:16,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:16,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-13 19:12:16,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428708898] [2021-07-13 19:12:16,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:12:16,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:16,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:12:16,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:12:16,606 INFO L87 Difference]: Start difference. First operand 54 states and 103 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:16,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:16,833 INFO L93 Difference]: Finished difference Result 94 states and 172 transitions. [2021-07-13 19:12:16,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:12:16,834 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have 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 [2021-07-13 19:12:16,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:16,834 INFO L225 Difference]: With dead ends: 94 [2021-07-13 19:12:16,835 INFO L226 Difference]: Without dead ends: 87 [2021-07-13 19:12:16,835 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 284.5ms TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:12:16,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-07-13 19:12:16,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 55. [2021-07-13 19:12:16,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.9814814814814814) internal successors, (107), 54 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:16,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 107 transitions. [2021-07-13 19:12:16,839 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 107 transitions. Word has length 15 [2021-07-13 19:12:16,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:16,839 INFO L482 AbstractCegarLoop]: Abstraction has 55 states and 107 transitions. [2021-07-13 19:12:16,839 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:16,840 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 107 transitions. [2021-07-13 19:12:16,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:12:16,840 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:16,840 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:17,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:17,057 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:17,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:17,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1985184210, now seen corresponding path program 4 times [2021-07-13 19:12:17,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:17,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715128018] [2021-07-13 19:12:17,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:17,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:17,146 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:17,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:17,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715128018] [2021-07-13 19:12:17,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715128018] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:17,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233835717] [2021-07-13 19:12:17,147 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2021-07-13 19:12:17,185 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:12:17,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:17,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:12:17,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:17,386 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:17,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233835717] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:17,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:17,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2021-07-13 19:12:17,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213017632] [2021-07-13 19:12:17,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:12:17,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:17,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:12:17,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:12:17,388 INFO L87 Difference]: Start difference. First operand 55 states and 107 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:17,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:17,575 INFO L93 Difference]: Finished difference Result 81 states and 154 transitions. [2021-07-13 19:12:17,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:12:17,575 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have 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 [2021-07-13 19:12:17,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:17,576 INFO L225 Difference]: With dead ends: 81 [2021-07-13 19:12:17,576 INFO L226 Difference]: Without dead ends: 74 [2021-07-13 19:12:17,576 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 267.6ms TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:12:17,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-07-13 19:12:17,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 55. [2021-07-13 19:12:17,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.9814814814814814) internal successors, (107), 54 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:17,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 107 transitions. [2021-07-13 19:12:17,580 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 107 transitions. Word has length 15 [2021-07-13 19:12:17,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:17,581 INFO L482 AbstractCegarLoop]: Abstraction has 55 states and 107 transitions. [2021-07-13 19:12:17,581 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:17,581 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 107 transitions. [2021-07-13 19:12:17,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:12:17,581 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:17,581 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:17,793 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-07-13 19:12:17,793 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:17,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:17,794 INFO L82 PathProgramCache]: Analyzing trace with hash 903122118, now seen corresponding path program 5 times [2021-07-13 19:12:17,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:17,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335915721] [2021-07-13 19:12:17,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:17,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:17,882 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:17,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:17,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335915721] [2021-07-13 19:12:17,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335915721] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:17,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384253773] [2021-07-13 19:12:17,883 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:17,907 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:12:17,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:17,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:12:17,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:18,041 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:18,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384253773] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:18,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:18,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 19:12:18,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88109850] [2021-07-13 19:12:18,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:12:18,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:18,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:12:18,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:12:18,043 INFO L87 Difference]: Start difference. First operand 55 states and 107 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:18,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:18,158 INFO L93 Difference]: Finished difference Result 72 states and 135 transitions. [2021-07-13 19:12:18,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:12:18,158 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:12:18,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:18,159 INFO L225 Difference]: With dead ends: 72 [2021-07-13 19:12:18,159 INFO L226 Difference]: Without dead ends: 65 [2021-07-13 19:12:18,160 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 162.9ms TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:12:18,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-07-13 19:12:18,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 57. [2021-07-13 19:12:18,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.0) internal successors, (112), 56 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:18,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 112 transitions. [2021-07-13 19:12:18,168 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 112 transitions. Word has length 15 [2021-07-13 19:12:18,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:18,170 INFO L482 AbstractCegarLoop]: Abstraction has 57 states and 112 transitions. [2021-07-13 19:12:18,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:18,173 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 112 transitions. [2021-07-13 19:12:18,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:12:18,174 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:18,174 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:18,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:18,385 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:18,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:18,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1312551350, now seen corresponding path program 6 times [2021-07-13 19:12:18,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:18,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590094857] [2021-07-13 19:12:18,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:18,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:18,559 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:18,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:18,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590094857] [2021-07-13 19:12:18,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590094857] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:18,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443617357] [2021-07-13 19:12:18,560 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2021-07-13 19:12:18,595 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:12:18,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:18,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:12:18,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:18,765 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:18,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443617357] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:18,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:18,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 19:12:18,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596168590] [2021-07-13 19:12:18,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:12:18,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:18,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:12:18,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:12:18,767 INFO L87 Difference]: Start difference. First operand 57 states and 112 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:18,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:18,932 INFO L93 Difference]: Finished difference Result 95 states and 176 transitions. [2021-07-13 19:12:18,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:12:18,933 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:12:18,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:18,934 INFO L225 Difference]: With dead ends: 95 [2021-07-13 19:12:18,934 INFO L226 Difference]: Without dead ends: 88 [2021-07-13 19:12:18,934 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 279.3ms TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:12:18,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-07-13 19:12:18,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 58. [2021-07-13 19:12:18,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.0350877192982457) internal successors, (116), 57 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:18,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 116 transitions. [2021-07-13 19:12:18,937 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 116 transitions. Word has length 15 [2021-07-13 19:12:18,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:18,937 INFO L482 AbstractCegarLoop]: Abstraction has 58 states and 116 transitions. [2021-07-13 19:12:18,938 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:18,938 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 116 transitions. [2021-07-13 19:12:18,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:12:18,938 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:18,938 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:19,139 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:19,139 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:19,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:19,140 INFO L82 PathProgramCache]: Analyzing trace with hash -1297090554, now seen corresponding path program 7 times [2021-07-13 19:12:19,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:19,140 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134709457] [2021-07-13 19:12:19,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:19,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:19,222 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:19,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:19,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134709457] [2021-07-13 19:12:19,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134709457] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:19,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303856658] [2021-07-13 19:12:19,223 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 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 [2021-07-13 19:12:19,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:19,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:12:19,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:19,383 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:19,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303856658] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:19,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:19,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 19:12:19,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839843019] [2021-07-13 19:12:19,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:12:19,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:19,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:12:19,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:12:19,384 INFO L87 Difference]: Start difference. First operand 58 states and 116 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:19,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:19,545 INFO L93 Difference]: Finished difference Result 82 states and 158 transitions. [2021-07-13 19:12:19,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:12:19,545 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:12:19,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:19,546 INFO L225 Difference]: With dead ends: 82 [2021-07-13 19:12:19,546 INFO L226 Difference]: Without dead ends: 75 [2021-07-13 19:12:19,546 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 193.7ms TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:12:19,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-07-13 19:12:19,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 56. [2021-07-13 19:12:19,548 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) [2021-07-13 19:12:19,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 109 transitions. [2021-07-13 19:12:19,548 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 109 transitions. Word has length 15 [2021-07-13 19:12:19,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:19,548 INFO L482 AbstractCegarLoop]: Abstraction has 56 states and 109 transitions. [2021-07-13 19:12:19,548 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:19,549 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 109 transitions. [2021-07-13 19:12:19,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:12:19,549 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:19,549 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:19,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-07-13 19:12:19,769 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:19,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:19,769 INFO L82 PathProgramCache]: Analyzing trace with hash 833619410, now seen corresponding path program 8 times [2021-07-13 19:12:19,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:19,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250989496] [2021-07-13 19:12:19,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:19,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:19,857 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:19,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:19,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250989496] [2021-07-13 19:12:19,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250989496] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:19,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252572847] [2021-07-13 19:12:19,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:19,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:12:19,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:19,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:12:19,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:20,016 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:20,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252572847] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:20,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:20,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 19:12:20,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590222735] [2021-07-13 19:12:20,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:12:20,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:20,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:12:20,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:12:20,018 INFO L87 Difference]: Start difference. First operand 56 states and 109 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:20,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:20,164 INFO L93 Difference]: Finished difference Result 92 states and 172 transitions. [2021-07-13 19:12:20,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:12:20,165 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:12:20,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:20,166 INFO L225 Difference]: With dead ends: 92 [2021-07-13 19:12:20,166 INFO L226 Difference]: Without dead ends: 85 [2021-07-13 19:12:20,167 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 198.2ms TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:12:20,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-07-13 19:12:20,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 58. [2021-07-13 19:12:20,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.0350877192982457) internal successors, (116), 57 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:20,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 116 transitions. [2021-07-13 19:12:20,173 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 116 transitions. Word has length 15 [2021-07-13 19:12:20,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:20,173 INFO L482 AbstractCegarLoop]: Abstraction has 58 states and 116 transitions. [2021-07-13 19:12:20,173 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:20,173 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 116 transitions. [2021-07-13 19:12:20,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:12:20,174 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:20,174 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:20,374 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-07-13 19:12:20,375 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:20,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:20,375 INFO L82 PathProgramCache]: Analyzing trace with hash 849080206, now seen corresponding path program 9 times [2021-07-13 19:12:20,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:20,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617522819] [2021-07-13 19:12:20,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:20,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:20,463 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:20,463 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:20,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617522819] [2021-07-13 19:12:20,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617522819] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:20,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917259601] [2021-07-13 19:12:20,463 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-07-13 19:12:20,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:12:20,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:20,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:12:20,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:20,635 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:20,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917259601] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:20,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:20,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 19:12:20,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643938257] [2021-07-13 19:12:20,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:12:20,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:20,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:12:20,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:12:20,637 INFO L87 Difference]: Start difference. First operand 58 states and 116 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:20,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:20,784 INFO L93 Difference]: Finished difference Result 98 states and 183 transitions. [2021-07-13 19:12:20,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:12:20,784 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:12:20,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:20,785 INFO L225 Difference]: With dead ends: 98 [2021-07-13 19:12:20,785 INFO L226 Difference]: Without dead ends: 91 [2021-07-13 19:12:20,785 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 190.8ms TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:12:20,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-07-13 19:12:20,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 57. [2021-07-13 19:12:20,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.0) internal successors, (112), 56 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:20,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 112 transitions. [2021-07-13 19:12:20,788 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 112 transitions. Word has length 15 [2021-07-13 19:12:20,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:20,788 INFO L482 AbstractCegarLoop]: Abstraction has 57 states and 112 transitions. [2021-07-13 19:12:20,788 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:20,788 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 112 transitions. [2021-07-13 19:12:20,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:12:20,789 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:20,789 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:21,013 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-07-13 19:12:21,014 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:21,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:21,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1420535012, now seen corresponding path program 10 times [2021-07-13 19:12:21,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:21,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548040931] [2021-07-13 19:12:21,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:21,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:21,088 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:21,089 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:21,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548040931] [2021-07-13 19:12:21,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548040931] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:21,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053229129] [2021-07-13 19:12:21,089 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2021-07-13 19:12:21,115 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:12:21,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:21,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:12:21,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:21,248 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:21,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053229129] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:21,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:21,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 19:12:21,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122308105] [2021-07-13 19:12:21,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:12:21,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:21,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:12:21,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:12:21,250 INFO L87 Difference]: Start difference. First operand 57 states and 112 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:21,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:21,360 INFO L93 Difference]: Finished difference Result 75 states and 142 transitions. [2021-07-13 19:12:21,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:12:21,360 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:12:21,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:21,361 INFO L225 Difference]: With dead ends: 75 [2021-07-13 19:12:21,361 INFO L226 Difference]: Without dead ends: 68 [2021-07-13 19:12:21,361 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 168.6ms TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:12:21,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-07-13 19:12:21,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 60. [2021-07-13 19:12:21,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.9830508474576272) internal successors, (117), 59 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) [2021-07-13 19:12:21,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 117 transitions. [2021-07-13 19:12:21,363 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 117 transitions. Word has length 15 [2021-07-13 19:12:21,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:21,363 INFO L482 AbstractCegarLoop]: Abstraction has 60 states and 117 transitions. [2021-07-13 19:12:21,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:21,363 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 117 transitions. [2021-07-13 19:12:21,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:12:21,364 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:21,364 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:21,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:21,577 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:21,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:21,577 INFO L82 PathProgramCache]: Analyzing trace with hash 1788920398, now seen corresponding path program 11 times [2021-07-13 19:12:21,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:21,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790157052] [2021-07-13 19:12:21,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:21,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:21,673 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:21,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:21,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790157052] [2021-07-13 19:12:21,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790157052] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:21,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446580629] [2021-07-13 19:12:21,673 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:21,709 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:12:21,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:21,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:12:21,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:21,842 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:21,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446580629] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:21,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:21,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 19:12:21,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452878889] [2021-07-13 19:12:21,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:12:21,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:21,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:12:21,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:12:21,845 INFO L87 Difference]: Start difference. First operand 60 states and 117 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:21,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:21,950 INFO L93 Difference]: Finished difference Result 76 states and 143 transitions. [2021-07-13 19:12:21,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:12:21,951 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:12:21,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:21,951 INFO L225 Difference]: With dead ends: 76 [2021-07-13 19:12:21,951 INFO L226 Difference]: Without dead ends: 69 [2021-07-13 19:12:21,952 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 186.1ms TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:12:21,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-07-13 19:12:21,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 62. [2021-07-13 19:12:21,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.0) internal successors, (122), 61 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:21,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 122 transitions. [2021-07-13 19:12:21,954 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 122 transitions. Word has length 15 [2021-07-13 19:12:21,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:21,954 INFO L482 AbstractCegarLoop]: Abstraction has 62 states and 122 transitions. [2021-07-13 19:12:21,954 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:21,954 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 122 transitions. [2021-07-13 19:12:21,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:12:21,955 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:21,955 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:22,177 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-07-13 19:12:22,177 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:22,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:22,177 INFO L82 PathProgramCache]: Analyzing trace with hash -426753070, now seen corresponding path program 12 times [2021-07-13 19:12:22,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:22,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800697016] [2021-07-13 19:12:22,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:22,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:22,284 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:22,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:22,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800697016] [2021-07-13 19:12:22,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800697016] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:22,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740132877] [2021-07-13 19:12:22,285 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 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 [2021-07-13 19:12:22,312 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:12:22,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:22,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:12:22,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:22,452 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:22,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740132877] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:22,452 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:22,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 19:12:22,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274149075] [2021-07-13 19:12:22,452 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:12:22,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:22,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:12:22,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:12:22,453 INFO L87 Difference]: Start difference. First operand 62 states and 122 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:22,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:22,618 INFO L93 Difference]: Finished difference Result 99 states and 184 transitions. [2021-07-13 19:12:22,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:12:22,618 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:12:22,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:22,619 INFO L225 Difference]: With dead ends: 99 [2021-07-13 19:12:22,619 INFO L226 Difference]: Without dead ends: 92 [2021-07-13 19:12:22,619 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 223.0ms TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:12:22,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-07-13 19:12:22,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 63. [2021-07-13 19:12:22,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.032258064516129) internal successors, (126), 62 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) [2021-07-13 19:12:22,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 126 transitions. [2021-07-13 19:12:22,622 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 126 transitions. Word has length 15 [2021-07-13 19:12:22,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:22,622 INFO L482 AbstractCegarLoop]: Abstraction has 63 states and 126 transitions. [2021-07-13 19:12:22,622 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:22,622 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 126 transitions. [2021-07-13 19:12:22,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:12:22,622 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:22,622 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:22,842 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-07-13 19:12:22,843 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:22,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:22,843 INFO L82 PathProgramCache]: Analyzing trace with hash -411292274, now seen corresponding path program 13 times [2021-07-13 19:12:22,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:22,843 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860775369] [2021-07-13 19:12:22,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:22,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:22,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:22,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:22,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860775369] [2021-07-13 19:12:22,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860775369] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:22,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109578488] [2021-07-13 19:12:22,926 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2021-07-13 19:12:22,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:22,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:12:22,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:23,084 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:23,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109578488] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:23,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:23,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 19:12:23,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642784526] [2021-07-13 19:12:23,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:12:23,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:23,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:12:23,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:12:23,086 INFO L87 Difference]: Start difference. First operand 63 states and 126 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:23,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:23,254 INFO L93 Difference]: Finished difference Result 86 states and 166 transitions. [2021-07-13 19:12:23,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:12:23,254 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:12:23,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:23,256 INFO L225 Difference]: With dead ends: 86 [2021-07-13 19:12:23,256 INFO L226 Difference]: Without dead ends: 79 [2021-07-13 19:12:23,256 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 201.6ms TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:12:23,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-07-13 19:12:23,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 61. [2021-07-13 19:12:23,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.9833333333333334) internal successors, (119), 60 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) [2021-07-13 19:12:23,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 119 transitions. [2021-07-13 19:12:23,259 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 119 transitions. Word has length 15 [2021-07-13 19:12:23,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:23,259 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 119 transitions. [2021-07-13 19:12:23,259 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:23,259 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 119 transitions. [2021-07-13 19:12:23,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:12:23,260 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:23,260 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:23,483 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-07-13 19:12:23,484 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:23,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:23,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1719417690, now seen corresponding path program 14 times [2021-07-13 19:12:23,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:23,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429502374] [2021-07-13 19:12:23,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:23,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:23,556 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:23,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:23,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429502374] [2021-07-13 19:12:23,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429502374] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:23,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432496577] [2021-07-13 19:12:23,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:23,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:12:23,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:23,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:12:23,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:23,705 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:23,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432496577] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:23,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:23,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 19:12:23,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319680847] [2021-07-13 19:12:23,706 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:12:23,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:23,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:12:23,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:12:23,707 INFO L87 Difference]: Start difference. First operand 61 states and 119 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:23,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:23,855 INFO L93 Difference]: Finished difference Result 96 states and 180 transitions. [2021-07-13 19:12:23,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:12:23,856 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:12:23,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:23,856 INFO L225 Difference]: With dead ends: 96 [2021-07-13 19:12:23,856 INFO L226 Difference]: Without dead ends: 89 [2021-07-13 19:12:23,857 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 182.1ms TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:12:23,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-07-13 19:12:23,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 63. [2021-07-13 19:12:23,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.032258064516129) internal successors, (126), 62 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) [2021-07-13 19:12:23,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 126 transitions. [2021-07-13 19:12:23,859 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 126 transitions. Word has length 15 [2021-07-13 19:12:23,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:23,859 INFO L482 AbstractCegarLoop]: Abstraction has 63 states and 126 transitions. [2021-07-13 19:12:23,859 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:23,859 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 126 transitions. [2021-07-13 19:12:23,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:12:23,860 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:23,860 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:24,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:24,069 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:24,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:24,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1734878486, now seen corresponding path program 15 times [2021-07-13 19:12:24,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:24,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848759192] [2021-07-13 19:12:24,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:24,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:24,150 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:24,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:24,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848759192] [2021-07-13 19:12:24,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848759192] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:24,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228930878] [2021-07-13 19:12:24,150 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:24,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:12:24,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:24,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:12:24,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:24,297 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:24,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228930878] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:24,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:24,298 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 19:12:24,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202213931] [2021-07-13 19:12:24,298 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:12:24,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:24,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:12:24,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:12:24,299 INFO L87 Difference]: Start difference. First operand 63 states and 126 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:24,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:24,452 INFO L93 Difference]: Finished difference Result 102 states and 191 transitions. [2021-07-13 19:12:24,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:12:24,452 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:12:24,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:24,453 INFO L225 Difference]: With dead ends: 102 [2021-07-13 19:12:24,453 INFO L226 Difference]: Without dead ends: 95 [2021-07-13 19:12:24,453 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 193.6ms TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:12:24,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-07-13 19:12:24,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 62. [2021-07-13 19:12:24,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.0) internal successors, (122), 61 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:24,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 122 transitions. [2021-07-13 19:12:24,455 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 122 transitions. Word has length 15 [2021-07-13 19:12:24,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:24,455 INFO L482 AbstractCegarLoop]: Abstraction has 62 states and 122 transitions. [2021-07-13 19:12:24,455 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:24,455 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 122 transitions. [2021-07-13 19:12:24,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:12:24,456 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:24,456 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:24,669 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:24,669 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:24,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:24,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1988634004, now seen corresponding path program 16 times [2021-07-13 19:12:24,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:24,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176516293] [2021-07-13 19:12:24,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:24,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:24,742 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:24,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:24,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176516293] [2021-07-13 19:12:24,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176516293] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:24,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575620713] [2021-07-13 19:12:24,742 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:12:24,772 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:12:24,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:24,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:12:24,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:24,956 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:24,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575620713] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:24,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:24,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 19:12:24,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332957681] [2021-07-13 19:12:24,958 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:12:24,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:24,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:12:24,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:12:24,959 INFO L87 Difference]: Start difference. First operand 62 states and 122 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:25,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:25,062 INFO L93 Difference]: Finished difference Result 79 states and 150 transitions. [2021-07-13 19:12:25,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:12:25,063 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:12:25,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:25,063 INFO L225 Difference]: With dead ends: 79 [2021-07-13 19:12:25,063 INFO L226 Difference]: Without dead ends: 72 [2021-07-13 19:12:25,063 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 176.5ms TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:12:25,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-07-13 19:12:25,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 60. [2021-07-13 19:12:25,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.9830508474576272) internal successors, (117), 59 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) [2021-07-13 19:12:25,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 117 transitions. [2021-07-13 19:12:25,066 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 117 transitions. Word has length 15 [2021-07-13 19:12:25,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:25,066 INFO L482 AbstractCegarLoop]: Abstraction has 60 states and 117 transitions. [2021-07-13 19:12:25,066 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:25,066 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 117 transitions. [2021-07-13 19:12:25,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:12:25,066 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:25,066 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:25,290 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-07-13 19:12:25,290 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:25,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:25,291 INFO L82 PathProgramCache]: Analyzing trace with hash 625326102, now seen corresponding path program 17 times [2021-07-13 19:12:25,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:25,291 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112050352] [2021-07-13 19:12:25,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:25,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:25,363 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:25,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:25,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112050352] [2021-07-13 19:12:25,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112050352] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:25,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957786076] [2021-07-13 19:12:25,364 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2021-07-13 19:12:25,385 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:12:25,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:25,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:12:25,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:25,526 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:25,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957786076] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:25,526 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:25,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 19:12:25,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766500017] [2021-07-13 19:12:25,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:12:25,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:25,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:12:25,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:12:25,527 INFO L87 Difference]: Start difference. First operand 60 states and 117 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:25,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:25,681 INFO L93 Difference]: Finished difference Result 99 states and 185 transitions. [2021-07-13 19:12:25,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:12:25,682 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:12:25,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:25,682 INFO L225 Difference]: With dead ends: 99 [2021-07-13 19:12:25,682 INFO L226 Difference]: Without dead ends: 92 [2021-07-13 19:12:25,682 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 190.9ms TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:12:25,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-07-13 19:12:25,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 62. [2021-07-13 19:12:25,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.0327868852459017) internal successors, (124), 61 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) [2021-07-13 19:12:25,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 124 transitions. [2021-07-13 19:12:25,685 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 124 transitions. Word has length 15 [2021-07-13 19:12:25,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:25,685 INFO L482 AbstractCegarLoop]: Abstraction has 62 states and 124 transitions. [2021-07-13 19:12:25,685 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:25,685 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 124 transitions. [2021-07-13 19:12:25,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:12:25,685 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:25,685 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:25,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-07-13 19:12:25,889 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:25,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:25,889 INFO L82 PathProgramCache]: Analyzing trace with hash 640786898, now seen corresponding path program 18 times [2021-07-13 19:12:25,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:25,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024977701] [2021-07-13 19:12:25,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:25,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:25,956 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:25,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:25,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024977701] [2021-07-13 19:12:25,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024977701] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:25,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691858986] [2021-07-13 19:12:25,957 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2021-07-13 19:12:25,978 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:12:25,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:25,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:12:25,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:26,128 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:26,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691858986] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:26,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:26,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 19:12:26,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021284300] [2021-07-13 19:12:26,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:12:26,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:26,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:12:26,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:12:26,130 INFO L87 Difference]: Start difference. First operand 62 states and 124 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:26,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:26,262 INFO L93 Difference]: Finished difference Result 105 states and 196 transitions. [2021-07-13 19:12:26,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:12:26,262 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:12:26,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:26,263 INFO L225 Difference]: With dead ends: 105 [2021-07-13 19:12:26,263 INFO L226 Difference]: Without dead ends: 98 [2021-07-13 19:12:26,263 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 192.4ms TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:12:26,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-07-13 19:12:26,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 61. [2021-07-13 19:12:26,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.0) internal successors, (120), 60 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:26,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 120 transitions. [2021-07-13 19:12:26,266 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 120 transitions. Word has length 15 [2021-07-13 19:12:26,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:26,266 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 120 transitions. [2021-07-13 19:12:26,266 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:26,266 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 120 transitions. [2021-07-13 19:12:26,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:12:26,266 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:26,266 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:26,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:26,485 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:26,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:26,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1212241704, now seen corresponding path program 19 times [2021-07-13 19:12:26,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:26,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655263467] [2021-07-13 19:12:26,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:26,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:26,556 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:26,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:26,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655263467] [2021-07-13 19:12:26,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655263467] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:26,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842495128] [2021-07-13 19:12:26,557 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2021-07-13 19:12:26,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:26,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:12:26,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:26,703 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:26,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842495128] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:26,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:26,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 19:12:26,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851648099] [2021-07-13 19:12:26,704 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:12:26,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:26,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:12:26,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:12:26,705 INFO L87 Difference]: Start difference. First operand 61 states and 120 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:26,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:26,815 INFO L93 Difference]: Finished difference Result 85 states and 160 transitions. [2021-07-13 19:12:26,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:12:26,815 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:12:26,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:26,816 INFO L225 Difference]: With dead ends: 85 [2021-07-13 19:12:26,816 INFO L226 Difference]: Without dead ends: 78 [2021-07-13 19:12:26,816 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 162.6ms TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:12:26,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-07-13 19:12:26,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 60. [2021-07-13 19:12:26,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.9830508474576272) internal successors, (117), 59 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) [2021-07-13 19:12:26,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 117 transitions. [2021-07-13 19:12:26,818 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 117 transitions. Word has length 15 [2021-07-13 19:12:26,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:26,818 INFO L482 AbstractCegarLoop]: Abstraction has 60 states and 117 transitions. [2021-07-13 19:12:26,818 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:26,818 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 117 transitions. [2021-07-13 19:12:26,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:12:26,819 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:26,819 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:27,025 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-07-13 19:12:27,025 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:27,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:27,025 INFO L82 PathProgramCache]: Analyzing trace with hash 51263382, now seen corresponding path program 3 times [2021-07-13 19:12:27,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:27,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962338894] [2021-07-13 19:12:27,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:27,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:27,113 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:27,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:27,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962338894] [2021-07-13 19:12:27,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962338894] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:27,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122489766] [2021-07-13 19:12:27,114 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-07-13 19:12:27,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:12:27,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:27,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:12:27,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:27,208 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:27,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122489766] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:27,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:27,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-07-13 19:12:27,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425922658] [2021-07-13 19:12:27,209 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:12:27,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:27,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:12:27,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:12:27,210 INFO L87 Difference]: Start difference. First operand 60 states and 117 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:27,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:27,342 INFO L93 Difference]: Finished difference Result 92 states and 178 transitions. [2021-07-13 19:12:27,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 19:12:27,342 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have 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 [2021-07-13 19:12:27,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:27,343 INFO L225 Difference]: With dead ends: 92 [2021-07-13 19:12:27,343 INFO L226 Difference]: Without dead ends: 81 [2021-07-13 19:12:27,343 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 169.0ms TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:12:27,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-07-13 19:12:27,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 64. [2021-07-13 19:12:27,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.015873015873016) internal successors, (127), 63 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) [2021-07-13 19:12:27,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 127 transitions. [2021-07-13 19:12:27,345 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 127 transitions. Word has length 15 [2021-07-13 19:12:27,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:27,345 INFO L482 AbstractCegarLoop]: Abstraction has 64 states and 127 transitions. [2021-07-13 19:12:27,345 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:27,345 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 127 transitions. [2021-07-13 19:12:27,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:12:27,346 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:27,346 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:27,555 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:27,555 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:27,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:27,555 INFO L82 PathProgramCache]: Analyzing trace with hash 674386126, now seen corresponding path program 20 times [2021-07-13 19:12:27,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:27,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130796182] [2021-07-13 19:12:27,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:27,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:27,624 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:27,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:27,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130796182] [2021-07-13 19:12:27,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130796182] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:27,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350089412] [2021-07-13 19:12:27,625 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 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 [2021-07-13 19:12:27,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:12:27,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:27,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:12:27,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:27,807 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:27,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350089412] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:27,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:27,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 19:12:27,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208072416] [2021-07-13 19:12:27,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:12:27,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:27,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:12:27,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:12:27,809 INFO L87 Difference]: Start difference. First operand 64 states and 127 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:27,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:27,927 INFO L93 Difference]: Finished difference Result 86 states and 163 transitions. [2021-07-13 19:12:27,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:12:27,928 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-07-13 19:12:27,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:27,928 INFO L225 Difference]: With dead ends: 86 [2021-07-13 19:12:27,928 INFO L226 Difference]: Without dead ends: 79 [2021-07-13 19:12:27,929 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 181.0ms TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:12:27,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-07-13 19:12:27,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 69. [2021-07-13 19:12:27,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.9852941176470589) internal successors, (135), 68 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) [2021-07-13 19:12:27,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 135 transitions. [2021-07-13 19:12:27,931 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 135 transitions. Word has length 15 [2021-07-13 19:12:27,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:27,931 INFO L482 AbstractCegarLoop]: Abstraction has 69 states and 135 transitions. [2021-07-13 19:12:27,931 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:27,931 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 135 transitions. [2021-07-13 19:12:27,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:12:27,932 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:27,932 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:28,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-07-13 19:12:28,145 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:28,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:28,145 INFO L82 PathProgramCache]: Analyzing trace with hash 59077016, now seen corresponding path program 3 times [2021-07-13 19:12:28,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:28,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982919664] [2021-07-13 19:12:28,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:28,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:28,238 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:28,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:28,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982919664] [2021-07-13 19:12:28,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982919664] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:28,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341913952] [2021-07-13 19:12:28,239 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-07-13 19:12:28,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:12:28,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:28,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:12:28,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:28,373 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:28,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341913952] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:28,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:28,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-07-13 19:12:28,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873779184] [2021-07-13 19:12:28,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:12:28,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:28,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:12:28,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:12:28,375 INFO L87 Difference]: Start difference. First operand 69 states and 135 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:28,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:28,551 INFO L93 Difference]: Finished difference Result 97 states and 189 transitions. [2021-07-13 19:12:28,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:12:28,551 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have 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 [2021-07-13 19:12:28,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:28,551 INFO L225 Difference]: With dead ends: 97 [2021-07-13 19:12:28,551 INFO L226 Difference]: Without dead ends: 84 [2021-07-13 19:12:28,552 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 222.3ms TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:12:28,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-07-13 19:12:28,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 71. [2021-07-13 19:12:28,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 2.0) internal successors, (140), 70 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:28,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 140 transitions. [2021-07-13 19:12:28,554 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 140 transitions. Word has length 17 [2021-07-13 19:12:28,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:28,554 INFO L482 AbstractCegarLoop]: Abstraction has 71 states and 140 transitions. [2021-07-13 19:12:28,554 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:28,554 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 140 transitions. [2021-07-13 19:12:28,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:12:28,554 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:28,555 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:28,778 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-07-13 19:12:28,778 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:28,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:28,779 INFO L82 PathProgramCache]: Analyzing trace with hash 2083408152, now seen corresponding path program 21 times [2021-07-13 19:12:28,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:28,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135445838] [2021-07-13 19:12:28,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:28,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:28,876 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:28,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:28,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135445838] [2021-07-13 19:12:28,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135445838] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:28,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558333040] [2021-07-13 19:12:28,877 INFO L93 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 [2021-07-13 19:12:28,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:12:28,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:28,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:12:28,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:29,091 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:29,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558333040] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:29,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:29,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 19:12:29,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676469178] [2021-07-13 19:12:29,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:12:29,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:29,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:12:29,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:12:29,093 INFO L87 Difference]: Start difference. First operand 71 states and 140 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) 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) [2021-07-13 19:12:29,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:29,420 INFO L93 Difference]: Finished difference Result 99 states and 188 transitions. [2021-07-13 19:12:29,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:12:29,420 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) 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 17 [2021-07-13 19:12:29,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:29,421 INFO L225 Difference]: With dead ends: 99 [2021-07-13 19:12:29,421 INFO L226 Difference]: Without dead ends: 92 [2021-07-13 19:12:29,421 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 384.5ms TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:12:29,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-07-13 19:12:29,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 71. [2021-07-13 19:12:29,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 2.0) internal successors, (140), 70 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:29,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 140 transitions. [2021-07-13 19:12:29,423 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 140 transitions. Word has length 17 [2021-07-13 19:12:29,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:29,423 INFO L482 AbstractCegarLoop]: Abstraction has 71 states and 140 transitions. [2021-07-13 19:12:29,423 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) 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) [2021-07-13 19:12:29,423 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 140 transitions. [2021-07-13 19:12:29,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:12:29,424 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:29,424 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:29,647 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-07-13 19:12:29,647 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:29,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:29,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1700687764, now seen corresponding path program 22 times [2021-07-13 19:12:29,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:29,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621191372] [2021-07-13 19:12:29,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:29,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:29,739 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:29,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:29,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621191372] [2021-07-13 19:12:29,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621191372] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:29,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025409668] [2021-07-13 19:12:29,740 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 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 [2021-07-13 19:12:29,761 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:12:29,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:29,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:12:29,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:29,929 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:29,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025409668] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:29,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:29,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 19:12:29,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535794672] [2021-07-13 19:12:29,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:12:29,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:29,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:12:29,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:12:29,930 INFO L87 Difference]: Start difference. First operand 71 states and 140 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) 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) [2021-07-13 19:12:30,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:30,165 INFO L93 Difference]: Finished difference Result 104 states and 198 transitions. [2021-07-13 19:12:30,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:12:30,166 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) 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 17 [2021-07-13 19:12:30,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:30,166 INFO L225 Difference]: With dead ends: 104 [2021-07-13 19:12:30,166 INFO L226 Difference]: Without dead ends: 97 [2021-07-13 19:12:30,167 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 304.0ms TimeCoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:12:30,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-07-13 19:12:30,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 73. [2021-07-13 19:12:30,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.013888888888889) internal successors, (145), 72 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:30,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 145 transitions. [2021-07-13 19:12:30,169 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 145 transitions. Word has length 17 [2021-07-13 19:12:30,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:30,169 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 145 transitions. [2021-07-13 19:12:30,169 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) 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) [2021-07-13 19:12:30,169 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 145 transitions. [2021-07-13 19:12:30,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:12:30,170 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:30,170 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:30,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-07-13 19:12:30,379 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:30,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:30,380 INFO L82 PathProgramCache]: Analyzing trace with hash -514985704, now seen corresponding path program 23 times [2021-07-13 19:12:30,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:30,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867830094] [2021-07-13 19:12:30,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:30,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:30,483 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:30,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:30,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867830094] [2021-07-13 19:12:30,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867830094] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:30,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308153351] [2021-07-13 19:12:30,485 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 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 [2021-07-13 19:12:30,517 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:12:30,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:30,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:12:30,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:30,692 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:30,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308153351] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:30,692 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:30,692 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 19:12:30,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946792352] [2021-07-13 19:12:30,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:12:30,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:30,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:12:30,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:12:30,693 INFO L87 Difference]: Start difference. First operand 73 states and 145 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) 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) [2021-07-13 19:12:31,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:31,012 INFO L93 Difference]: Finished difference Result 130 states and 246 transitions. [2021-07-13 19:12:31,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:12:31,012 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) 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 17 [2021-07-13 19:12:31,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:31,013 INFO L225 Difference]: With dead ends: 130 [2021-07-13 19:12:31,013 INFO L226 Difference]: Without dead ends: 123 [2021-07-13 19:12:31,013 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 337.4ms TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:12:31,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-07-13 19:12:31,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 74. [2021-07-13 19:12:31,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.041095890410959) internal successors, (149), 73 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:31,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 149 transitions. [2021-07-13 19:12:31,016 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 149 transitions. Word has length 17 [2021-07-13 19:12:31,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:31,016 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 149 transitions. [2021-07-13 19:12:31,016 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) 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) [2021-07-13 19:12:31,016 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 149 transitions. [2021-07-13 19:12:31,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:12:31,017 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:31,017 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:31,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:31,229 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:31,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:31,229 INFO L82 PathProgramCache]: Analyzing trace with hash -499524908, now seen corresponding path program 24 times [2021-07-13 19:12:31,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:31,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245649938] [2021-07-13 19:12:31,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:31,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:31,347 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:31,347 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:31,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245649938] [2021-07-13 19:12:31,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245649938] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:31,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780021886] [2021-07-13 19:12:31,347 INFO L93 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 [2021-07-13 19:12:31,369 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:12:31,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:31,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:12:31,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:31,526 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:31,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780021886] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:31,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:31,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 19:12:31,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397082903] [2021-07-13 19:12:31,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:12:31,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:31,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:12:31,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:12:31,528 INFO L87 Difference]: Start difference. First operand 74 states and 149 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) 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) [2021-07-13 19:12:31,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:31,908 INFO L93 Difference]: Finished difference Result 113 states and 220 transitions. [2021-07-13 19:12:31,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:12:31,909 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) 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 17 [2021-07-13 19:12:31,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:31,909 INFO L225 Difference]: With dead ends: 113 [2021-07-13 19:12:31,909 INFO L226 Difference]: Without dead ends: 106 [2021-07-13 19:12:31,910 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 360.2ms TimeCoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:12:31,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-07-13 19:12:31,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 72. [2021-07-13 19:12:31,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.0) internal successors, (142), 71 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) [2021-07-13 19:12:31,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 142 transitions. [2021-07-13 19:12:31,913 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 142 transitions. Word has length 17 [2021-07-13 19:12:31,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:31,913 INFO L482 AbstractCegarLoop]: Abstraction has 72 states and 142 transitions. [2021-07-13 19:12:31,913 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) 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) [2021-07-13 19:12:31,913 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 142 transitions. [2021-07-13 19:12:31,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:12:31,913 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:31,914 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:32,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:32,133 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:32,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:32,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1651089708, now seen corresponding path program 25 times [2021-07-13 19:12:32,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:32,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934284954] [2021-07-13 19:12:32,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:32,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:32,222 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:32,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:32,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934284954] [2021-07-13 19:12:32,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934284954] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:32,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803697218] [2021-07-13 19:12:32,223 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 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 [2021-07-13 19:12:32,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:32,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:12:32,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:32,422 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:32,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803697218] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:32,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:32,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 19:12:32,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968560944] [2021-07-13 19:12:32,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:12:32,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:32,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:12:32,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:12:32,424 INFO L87 Difference]: Start difference. First operand 72 states and 142 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) 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) [2021-07-13 19:12:32,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:32,703 INFO L93 Difference]: Finished difference Result 124 states and 236 transitions. [2021-07-13 19:12:32,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:12:32,703 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) 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 17 [2021-07-13 19:12:32,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:32,703 INFO L225 Difference]: With dead ends: 124 [2021-07-13 19:12:32,704 INFO L226 Difference]: Without dead ends: 117 [2021-07-13 19:12:32,704 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 296.0ms TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:12:32,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-07-13 19:12:32,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 74. [2021-07-13 19:12:32,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.041095890410959) internal successors, (149), 73 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:32,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 149 transitions. [2021-07-13 19:12:32,706 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 149 transitions. Word has length 17 [2021-07-13 19:12:32,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:32,706 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 149 transitions. [2021-07-13 19:12:32,706 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) 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) [2021-07-13 19:12:32,707 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 149 transitions. [2021-07-13 19:12:32,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:12:32,707 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:32,707 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:32,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:32,917 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:32,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:32,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1635628912, now seen corresponding path program 26 times [2021-07-13 19:12:32,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:32,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247028647] [2021-07-13 19:12:32,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:32,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:33,019 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:33,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:33,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247028647] [2021-07-13 19:12:33,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247028647] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:33,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25178671] [2021-07-13 19:12:33,019 INFO L93 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 [2021-07-13 19:12:33,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:12:33,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:33,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:12:33,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:33,260 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:33,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25178671] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:33,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:33,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 19:12:33,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486371690] [2021-07-13 19:12:33,261 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:12:33,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:33,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:12:33,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:12:33,262 INFO L87 Difference]: Start difference. First operand 74 states and 149 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) 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) [2021-07-13 19:12:33,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:33,558 INFO L93 Difference]: Finished difference Result 127 states and 241 transitions. [2021-07-13 19:12:33,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:12:33,558 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) 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 17 [2021-07-13 19:12:33,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:33,559 INFO L225 Difference]: With dead ends: 127 [2021-07-13 19:12:33,559 INFO L226 Difference]: Without dead ends: 120 [2021-07-13 19:12:33,559 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 396.7ms TimeCoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:12:33,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-07-13 19:12:33,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 73. [2021-07-13 19:12:33,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.013888888888889) internal successors, (145), 72 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:33,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 145 transitions. [2021-07-13 19:12:33,561 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 145 transitions. Word has length 17 [2021-07-13 19:12:33,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:33,561 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 145 transitions. [2021-07-13 19:12:33,561 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) 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) [2021-07-13 19:12:33,562 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 145 transitions. [2021-07-13 19:12:33,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:12:33,562 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:33,562 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:33,769 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-07-13 19:12:33,769 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:33,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:33,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1064174106, now seen corresponding path program 27 times [2021-07-13 19:12:33,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:33,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89444220] [2021-07-13 19:12:33,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:33,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:33,869 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:33,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:33,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89444220] [2021-07-13 19:12:33,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89444220] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:33,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115438439] [2021-07-13 19:12:33,869 INFO L93 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 [2021-07-13 19:12:33,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:12:33,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:33,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:12:33,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:34,054 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:34,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115438439] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:34,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:34,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 19:12:34,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704880526] [2021-07-13 19:12:34,054 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:12:34,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:34,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:12:34,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:12:34,055 INFO L87 Difference]: Start difference. First operand 73 states and 145 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) 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) [2021-07-13 19:12:34,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:34,217 INFO L93 Difference]: Finished difference Result 96 states and 184 transitions. [2021-07-13 19:12:34,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:12:34,217 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) 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 17 [2021-07-13 19:12:34,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:34,218 INFO L225 Difference]: With dead ends: 96 [2021-07-13 19:12:34,218 INFO L226 Difference]: Without dead ends: 89 [2021-07-13 19:12:34,218 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 235.0ms TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:12:34,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-07-13 19:12:34,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 71. [2021-07-13 19:12:34,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 2.0) internal successors, (140), 70 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:34,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 140 transitions. [2021-07-13 19:12:34,220 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 140 transitions. Word has length 17 [2021-07-13 19:12:34,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:34,220 INFO L482 AbstractCegarLoop]: Abstraction has 71 states and 140 transitions. [2021-07-13 19:12:34,220 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) 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) [2021-07-13 19:12:34,220 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 140 transitions. [2021-07-13 19:12:34,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:12:34,220 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:34,220 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:34,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:34,433 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:34,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:34,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1845444760, now seen corresponding path program 28 times [2021-07-13 19:12:34,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:34,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687672642] [2021-07-13 19:12:34,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:34,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:34,529 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:34,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:34,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687672642] [2021-07-13 19:12:34,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687672642] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:34,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735962047] [2021-07-13 19:12:34,529 INFO L93 rtionOrderModulation]: Changing 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 [2021-07-13 19:12:34,566 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:12:34,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:34,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:12:34,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:34,780 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:34,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735962047] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:34,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:34,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-07-13 19:12:34,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736750504] [2021-07-13 19:12:34,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:12:34,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:34,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:12:34,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:12:34,782 INFO L87 Difference]: Start difference. First operand 71 states and 140 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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) [2021-07-13 19:12:35,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:35,275 INFO L93 Difference]: Finished difference Result 112 states and 205 transitions. [2021-07-13 19:12:35,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:12:35,275 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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 17 [2021-07-13 19:12:35,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:35,276 INFO L225 Difference]: With dead ends: 112 [2021-07-13 19:12:35,276 INFO L226 Difference]: Without dead ends: 76 [2021-07-13 19:12:35,276 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 613.3ms TimeCoverageRelationStatistics Valid=174, Invalid=756, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:12:35,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-07-13 19:12:35,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 73. [2021-07-13 19:12:35,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.9861111111111112) internal successors, (143), 72 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:35,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 143 transitions. [2021-07-13 19:12:35,278 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 143 transitions. Word has length 17 [2021-07-13 19:12:35,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:35,278 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 143 transitions. [2021-07-13 19:12:35,279 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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) [2021-07-13 19:12:35,279 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 143 transitions. [2021-07-13 19:12:35,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:12:35,279 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:35,279 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:35,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-07-13 19:12:35,489 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:35,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:35,489 INFO L82 PathProgramCache]: Analyzing trace with hash -695788720, now seen corresponding path program 29 times [2021-07-13 19:12:35,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:35,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134811518] [2021-07-13 19:12:35,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:35,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:35,573 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:35,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:35,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134811518] [2021-07-13 19:12:35,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134811518] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:35,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5574448] [2021-07-13 19:12:35,574 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:12:35,596 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:12:35,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:35,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:12:35,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:35,755 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:35,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5574448] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:35,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:35,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 19:12:35,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717524033] [2021-07-13 19:12:35,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:12:35,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:35,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:12:35,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:12:35,756 INFO L87 Difference]: Start difference. First operand 73 states and 143 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) 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) [2021-07-13 19:12:36,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:36,001 INFO L93 Difference]: Finished difference Result 95 states and 181 transitions. [2021-07-13 19:12:36,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:12:36,002 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) 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 17 [2021-07-13 19:12:36,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:36,002 INFO L225 Difference]: With dead ends: 95 [2021-07-13 19:12:36,002 INFO L226 Difference]: Without dead ends: 88 [2021-07-13 19:12:36,002 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 279.1ms TimeCoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:12:36,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-07-13 19:12:36,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 75. [2021-07-13 19:12:36,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.0) internal successors, (148), 74 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) [2021-07-13 19:12:36,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 148 transitions. [2021-07-13 19:12:36,004 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 148 transitions. Word has length 17 [2021-07-13 19:12:36,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:36,004 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 148 transitions. [2021-07-13 19:12:36,004 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) 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) [2021-07-13 19:12:36,004 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 148 transitions. [2021-07-13 19:12:36,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:12:36,005 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:36,005 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:36,213 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:36,213 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:36,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:36,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1383505108, now seen corresponding path program 30 times [2021-07-13 19:12:36,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:36,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827859785] [2021-07-13 19:12:36,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:36,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:36,321 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:36,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:36,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827859785] [2021-07-13 19:12:36,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827859785] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:36,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207697042] [2021-07-13 19:12:36,322 INFO L93 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 [2021-07-13 19:12:36,342 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:12:36,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:36,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:12:36,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:36,515 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:36,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207697042] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:36,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:36,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 19:12:36,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256426280] [2021-07-13 19:12:36,516 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:12:36,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:36,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:12:36,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:12:36,517 INFO L87 Difference]: Start difference. First operand 75 states and 148 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) 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) [2021-07-13 19:12:36,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:36,866 INFO L93 Difference]: Finished difference Result 136 states and 258 transitions. [2021-07-13 19:12:36,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:12:36,866 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) 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 17 [2021-07-13 19:12:36,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:36,867 INFO L225 Difference]: With dead ends: 136 [2021-07-13 19:12:36,867 INFO L226 Difference]: Without dead ends: 129 [2021-07-13 19:12:36,867 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 352.0ms TimeCoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:12:36,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-07-13 19:12:36,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 76. [2021-07-13 19:12:36,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.026666666666667) internal successors, (152), 75 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:36,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 152 transitions. [2021-07-13 19:12:36,869 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 152 transitions. Word has length 17 [2021-07-13 19:12:36,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:36,869 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 152 transitions. [2021-07-13 19:12:36,870 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) 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) [2021-07-13 19:12:36,870 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 152 transitions. [2021-07-13 19:12:36,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:12:36,870 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:36,870 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:37,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-07-13 19:12:37,085 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:37,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:37,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1398965904, now seen corresponding path program 31 times [2021-07-13 19:12:37,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:37,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956364690] [2021-07-13 19:12:37,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:37,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:37,190 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:37,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:37,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956364690] [2021-07-13 19:12:37,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956364690] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:37,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922857123] [2021-07-13 19:12:37,190 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:12:37,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:37,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:12:37,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:37,432 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:37,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922857123] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:37,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:37,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 19:12:37,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634937675] [2021-07-13 19:12:37,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:12:37,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:37,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:12:37,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:12:37,434 INFO L87 Difference]: Start difference. First operand 76 states and 152 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) 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) [2021-07-13 19:12:37,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:37,767 INFO L93 Difference]: Finished difference Result 122 states and 238 transitions. [2021-07-13 19:12:37,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:12:37,768 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) 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 17 [2021-07-13 19:12:37,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:37,769 INFO L225 Difference]: With dead ends: 122 [2021-07-13 19:12:37,769 INFO L226 Difference]: Without dead ends: 115 [2021-07-13 19:12:37,769 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 390.6ms TimeCoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:12:37,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-07-13 19:12:37,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 74. [2021-07-13 19:12:37,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.9863013698630136) internal successors, (145), 73 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:37,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 145 transitions. [2021-07-13 19:12:37,771 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 145 transitions. Word has length 17 [2021-07-13 19:12:37,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:37,772 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 145 transitions. [2021-07-13 19:12:37,772 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) 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) [2021-07-13 19:12:37,772 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 145 transitions. [2021-07-13 19:12:37,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:12:37,772 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:37,772 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:37,985 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-07-13 19:12:37,985 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:37,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:37,985 INFO L82 PathProgramCache]: Analyzing trace with hash -765291428, now seen corresponding path program 32 times [2021-07-13 19:12:37,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:37,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646012234] [2021-07-13 19:12:37,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:37,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:38,081 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:38,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:38,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646012234] [2021-07-13 19:12:38,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646012234] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:38,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473652656] [2021-07-13 19:12:38,082 INFO L93 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 [2021-07-13 19:12:38,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:12:38,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:38,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:12:38,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:38,281 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:38,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473652656] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:38,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:38,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 19:12:38,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303615055] [2021-07-13 19:12:38,282 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:12:38,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:38,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:12:38,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:12:38,282 INFO L87 Difference]: Start difference. First operand 74 states and 145 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) 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) [2021-07-13 19:12:38,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:38,588 INFO L93 Difference]: Finished difference Result 134 states and 256 transitions. [2021-07-13 19:12:38,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:12:38,589 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) 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 17 [2021-07-13 19:12:38,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:38,589 INFO L225 Difference]: With dead ends: 134 [2021-07-13 19:12:38,589 INFO L226 Difference]: Without dead ends: 127 [2021-07-13 19:12:38,590 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 332.0ms TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:12:38,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-07-13 19:12:38,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 76. [2021-07-13 19:12:38,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.026666666666667) internal successors, (152), 75 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:38,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 152 transitions. [2021-07-13 19:12:38,592 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 152 transitions. Word has length 17 [2021-07-13 19:12:38,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:38,592 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 152 transitions. [2021-07-13 19:12:38,592 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) 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) [2021-07-13 19:12:38,592 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 152 transitions. [2021-07-13 19:12:38,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:12:38,593 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:38,593 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:38,813 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-07-13 19:12:38,813 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:38,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:38,813 INFO L82 PathProgramCache]: Analyzing trace with hash -749830632, now seen corresponding path program 33 times [2021-07-13 19:12:38,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:38,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504350534] [2021-07-13 19:12:38,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:38,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:38,897 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:38,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:38,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504350534] [2021-07-13 19:12:38,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504350534] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:38,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571689702] [2021-07-13 19:12:38,897 INFO L93 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 [2021-07-13 19:12:38,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:12:38,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:38,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:12:38,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:39,132 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:39,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571689702] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:39,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:39,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 19:12:39,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666418295] [2021-07-13 19:12:39,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:12:39,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:39,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:12:39,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:12:39,134 INFO L87 Difference]: Start difference. First operand 76 states and 152 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) 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) [2021-07-13 19:12:39,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:39,510 INFO L93 Difference]: Finished difference Result 145 states and 275 transitions. [2021-07-13 19:12:39,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:12:39,510 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) 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 17 [2021-07-13 19:12:39,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:39,510 INFO L225 Difference]: With dead ends: 145 [2021-07-13 19:12:39,511 INFO L226 Difference]: Without dead ends: 138 [2021-07-13 19:12:39,511 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 418.6ms TimeCoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:12:39,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-07-13 19:12:39,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 75. [2021-07-13 19:12:39,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.0) internal successors, (148), 74 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) [2021-07-13 19:12:39,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 148 transitions. [2021-07-13 19:12:39,513 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 148 transitions. Word has length 17 [2021-07-13 19:12:39,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:39,513 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 148 transitions. [2021-07-13 19:12:39,513 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) 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) [2021-07-13 19:12:39,513 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 148 transitions. [2021-07-13 19:12:39,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:12:39,514 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:39,514 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:39,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-07-13 19:12:39,729 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:39,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:39,729 INFO L82 PathProgramCache]: Analyzing trace with hash -178375826, now seen corresponding path program 34 times [2021-07-13 19:12:39,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:39,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088034407] [2021-07-13 19:12:39,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:39,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:39,820 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:39,820 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:39,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088034407] [2021-07-13 19:12:39,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088034407] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:39,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031756917] [2021-07-13 19:12:39,821 INFO L93 rtionOrderModulation]: Changing 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 [2021-07-13 19:12:39,841 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:12:39,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:39,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:12:39,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:40,025 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:40,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031756917] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:40,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:40,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 19:12:40,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452624850] [2021-07-13 19:12:40,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:12:40,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:40,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:12:40,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:12:40,027 INFO L87 Difference]: Start difference. First operand 75 states and 148 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) 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) [2021-07-13 19:12:40,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:40,380 INFO L93 Difference]: Finished difference Result 105 states and 200 transitions. [2021-07-13 19:12:40,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:12:40,381 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) 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 17 [2021-07-13 19:12:40,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:40,381 INFO L225 Difference]: With dead ends: 105 [2021-07-13 19:12:40,381 INFO L226 Difference]: Without dead ends: 98 [2021-07-13 19:12:40,382 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 349.3ms TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:12:40,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-07-13 19:12:40,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 73. [2021-07-13 19:12:40,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.9861111111111112) internal successors, (143), 72 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:40,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 143 transitions. [2021-07-13 19:12:40,384 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 143 transitions. Word has length 17 [2021-07-13 19:12:40,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:40,384 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 143 transitions. [2021-07-13 19:12:40,384 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) 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) [2021-07-13 19:12:40,384 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 143 transitions. [2021-07-13 19:12:40,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:12:40,384 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:40,384 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:40,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:40,601 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:40,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:40,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1859383016, now seen corresponding path program 35 times [2021-07-13 19:12:40,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:40,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64617902] [2021-07-13 19:12:40,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:40,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:40,697 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:40,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:40,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64617902] [2021-07-13 19:12:40,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64617902] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:40,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381590609] [2021-07-13 19:12:40,697 INFO L93 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 [2021-07-13 19:12:40,730 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:12:40,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:40,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:12:40,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:40,908 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:40,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381590609] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:40,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:40,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 19:12:40,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884201347] [2021-07-13 19:12:40,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:12:40,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:40,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:12:40,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:12:40,909 INFO L87 Difference]: Start difference. First operand 73 states and 143 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) 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) [2021-07-13 19:12:41,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:41,347 INFO L93 Difference]: Finished difference Result 154 states and 296 transitions. [2021-07-13 19:12:41,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:12:41,347 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) 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 17 [2021-07-13 19:12:41,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:41,348 INFO L225 Difference]: With dead ends: 154 [2021-07-13 19:12:41,348 INFO L226 Difference]: Without dead ends: 147 [2021-07-13 19:12:41,348 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 358.1ms TimeCoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:12:41,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-07-13 19:12:41,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 76. [2021-07-13 19:12:41,350 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) [2021-07-13 19:12:41,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 154 transitions. [2021-07-13 19:12:41,350 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 154 transitions. Word has length 17 [2021-07-13 19:12:41,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:41,350 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 154 transitions. [2021-07-13 19:12:41,350 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) 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) [2021-07-13 19:12:41,350 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 154 transitions. [2021-07-13 19:12:41,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:12:41,351 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:41,351 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:41,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-07-13 19:12:41,557 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:41,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:41,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1843922220, now seen corresponding path program 36 times [2021-07-13 19:12:41,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:41,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310875210] [2021-07-13 19:12:41,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:41,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:41,648 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:41,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:41,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310875210] [2021-07-13 19:12:41,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310875210] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:41,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853446084] [2021-07-13 19:12:41,648 INFO L93 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 [2021-07-13 19:12:41,681 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:12:41,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:41,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:12:41,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:41,860 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:41,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853446084] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:41,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:41,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 19:12:41,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062772307] [2021-07-13 19:12:41,862 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:12:41,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:41,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:12:41,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:12:41,863 INFO L87 Difference]: Start difference. First operand 76 states and 154 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) 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) [2021-07-13 19:12:42,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:42,435 INFO L93 Difference]: Finished difference Result 168 states and 320 transitions. [2021-07-13 19:12:42,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:12:42,436 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) 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 17 [2021-07-13 19:12:42,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:42,436 INFO L225 Difference]: With dead ends: 168 [2021-07-13 19:12:42,437 INFO L226 Difference]: Without dead ends: 161 [2021-07-13 19:12:42,437 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 432.7ms TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:12:42,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-07-13 19:12:42,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 75. [2021-07-13 19:12:42,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.027027027027027) internal successors, (150), 74 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:42,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 150 transitions. [2021-07-13 19:12:42,439 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 150 transitions. Word has length 17 [2021-07-13 19:12:42,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:42,439 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 150 transitions. [2021-07-13 19:12:42,439 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) 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) [2021-07-13 19:12:42,439 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 150 transitions. [2021-07-13 19:12:42,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:12:42,440 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:42,440 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:42,649 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:42,649 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:42,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:42,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1272467414, now seen corresponding path program 37 times [2021-07-13 19:12:42,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:42,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793988306] [2021-07-13 19:12:42,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:42,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:42,746 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:42,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:42,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793988306] [2021-07-13 19:12:42,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793988306] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:42,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594078078] [2021-07-13 19:12:42,746 INFO 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 [2021-07-13 19:12:42,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:42,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:12:42,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:42,970 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:42,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594078078] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:42,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:42,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 19:12:42,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961846139] [2021-07-13 19:12:42,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:12:42,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:42,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:12:42,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:12:42,972 INFO L87 Difference]: Start difference. First operand 75 states and 150 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) 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) [2021-07-13 19:12:43,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:43,356 INFO L93 Difference]: Finished difference Result 126 states and 240 transitions. [2021-07-13 19:12:43,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:12:43,356 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) 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 17 [2021-07-13 19:12:43,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:43,357 INFO L225 Difference]: With dead ends: 126 [2021-07-13 19:12:43,357 INFO L226 Difference]: Without dead ends: 119 [2021-07-13 19:12:43,357 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 402.4ms TimeCoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:12:43,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-07-13 19:12:43,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 74. [2021-07-13 19:12:43,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.0136986301369864) internal successors, (147), 73 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:43,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 147 transitions. [2021-07-13 19:12:43,359 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 147 transitions. Word has length 17 [2021-07-13 19:12:43,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:43,360 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 147 transitions. [2021-07-13 19:12:43,360 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) 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) [2021-07-13 19:12:43,360 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 147 transitions. [2021-07-13 19:12:43,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:12:43,360 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:43,360 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:43,582 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:43,582 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:43,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:43,583 INFO L82 PathProgramCache]: Analyzing trace with hash 164948120, now seen corresponding path program 38 times [2021-07-13 19:12:43,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:43,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316463888] [2021-07-13 19:12:43,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:43,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:43,667 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:43,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:43,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316463888] [2021-07-13 19:12:43,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316463888] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:43,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944301633] [2021-07-13 19:12:43,667 INFO L93 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 [2021-07-13 19:12:43,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:12:43,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:43,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:12:43,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:43,856 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:43,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944301633] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:43,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:43,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-07-13 19:12:43,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692108172] [2021-07-13 19:12:43,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:12:43,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:43,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:12:43,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:12:43,857 INFO L87 Difference]: Start difference. First operand 74 states and 147 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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) [2021-07-13 19:12:44,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:44,366 INFO L93 Difference]: Finished difference Result 140 states and 249 transitions. [2021-07-13 19:12:44,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:12:44,367 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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 17 [2021-07-13 19:12:44,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:44,367 INFO L225 Difference]: With dead ends: 140 [2021-07-13 19:12:44,367 INFO L226 Difference]: Without dead ends: 107 [2021-07-13 19:12:44,368 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 560.0ms TimeCoverageRelationStatistics Valid=176, Invalid=754, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:12:44,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-07-13 19:12:44,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 79. [2021-07-13 19:12:44,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.0128205128205128) internal successors, (157), 78 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:44,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 157 transitions. [2021-07-13 19:12:44,370 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 157 transitions. Word has length 17 [2021-07-13 19:12:44,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:44,370 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 157 transitions. [2021-07-13 19:12:44,370 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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) [2021-07-13 19:12:44,370 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 157 transitions. [2021-07-13 19:12:44,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:12:44,371 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:44,371 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:44,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-07-13 19:12:44,581 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:44,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:44,581 INFO L82 PathProgramCache]: Analyzing trace with hash -217772268, now seen corresponding path program 39 times [2021-07-13 19:12:44,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:44,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009579177] [2021-07-13 19:12:44,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:44,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:44,674 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:44,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:44,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009579177] [2021-07-13 19:12:44,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009579177] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:44,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726227895] [2021-07-13 19:12:44,675 INFO L93 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 [2021-07-13 19:12:44,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:12:44,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:44,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:12:44,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:44,888 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:44,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726227895] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:44,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:44,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-07-13 19:12:44,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913188180] [2021-07-13 19:12:44,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:12:44,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:44,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:12:44,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:12:44,889 INFO L87 Difference]: Start difference. First operand 79 states and 157 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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) [2021-07-13 19:12:45,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:45,263 INFO L93 Difference]: Finished difference Result 111 states and 210 transitions. [2021-07-13 19:12:45,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:12:45,263 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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 17 [2021-07-13 19:12:45,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:45,264 INFO L225 Difference]: With dead ends: 111 [2021-07-13 19:12:45,264 INFO L226 Difference]: Without dead ends: 104 [2021-07-13 19:12:45,264 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 440.4ms TimeCoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:12:45,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-07-13 19:12:45,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 77. [2021-07-13 19:12:45,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.0) internal successors, (152), 76 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:45,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 152 transitions. [2021-07-13 19:12:45,266 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 152 transitions. Word has length 17 [2021-07-13 19:12:45,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:45,266 INFO L482 AbstractCegarLoop]: Abstraction has 77 states and 152 transitions. [2021-07-13 19:12:45,266 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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) [2021-07-13 19:12:45,266 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 152 transitions. [2021-07-13 19:12:45,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:12:45,266 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:45,266 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:45,466 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-07-13 19:12:45,467 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:45,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:45,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1861521560, now seen corresponding path program 40 times [2021-07-13 19:12:45,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:45,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917074261] [2021-07-13 19:12:45,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:45,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:45,550 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:45,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:45,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917074261] [2021-07-13 19:12:45,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917074261] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:45,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405355954] [2021-07-13 19:12:45,551 INFO L93 rtionOrderModulation]: Changing 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 [2021-07-13 19:12:45,571 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:12:45,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:45,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:12:45,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:45,765 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:45,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405355954] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:45,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:45,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-07-13 19:12:45,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035535084] [2021-07-13 19:12:45,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:12:45,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:45,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:12:45,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:12:45,766 INFO L87 Difference]: Start difference. First operand 77 states and 152 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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) [2021-07-13 19:12:46,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:46,394 INFO L93 Difference]: Finished difference Result 182 states and 330 transitions. [2021-07-13 19:12:46,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:12:46,395 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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 17 [2021-07-13 19:12:46,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:46,396 INFO L225 Difference]: With dead ends: 182 [2021-07-13 19:12:46,396 INFO L226 Difference]: Without dead ends: 175 [2021-07-13 19:12:46,396 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 647.2ms TimeCoverageRelationStatistics Valid=206, Invalid=850, Unknown=0, NotChecked=0, Total=1056 [2021-07-13 19:12:46,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-07-13 19:12:46,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 78. [2021-07-13 19:12:46,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.0259740259740258) internal successors, (156), 77 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) [2021-07-13 19:12:46,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 156 transitions. [2021-07-13 19:12:46,399 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 156 transitions. Word has length 17 [2021-07-13 19:12:46,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:46,399 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 156 transitions. [2021-07-13 19:12:46,399 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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) [2021-07-13 19:12:46,399 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 156 transitions. [2021-07-13 19:12:46,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:12:46,399 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:46,399 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:46,609 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-07-13 19:12:46,609 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:46,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:46,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1876982356, now seen corresponding path program 41 times [2021-07-13 19:12:46,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:46,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102933719] [2021-07-13 19:12:46,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:46,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:46,703 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:46,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:46,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102933719] [2021-07-13 19:12:46,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102933719] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:46,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833626932] [2021-07-13 19:12:46,703 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 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 [2021-07-13 19:12:46,725 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:12:46,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:46,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:12:46,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:46,916 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:46,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833626932] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:46,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:46,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-07-13 19:12:46,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254339685] [2021-07-13 19:12:46,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:12:46,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:46,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:12:46,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:12:46,918 INFO L87 Difference]: Start difference. First operand 78 states and 156 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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) [2021-07-13 19:12:47,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:47,596 INFO L93 Difference]: Finished difference Result 174 states and 320 transitions. [2021-07-13 19:12:47,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:12:47,596 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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 17 [2021-07-13 19:12:47,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:47,597 INFO L225 Difference]: With dead ends: 174 [2021-07-13 19:12:47,597 INFO L226 Difference]: Without dead ends: 167 [2021-07-13 19:12:47,597 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 679.5ms TimeCoverageRelationStatistics Valid=203, Invalid=987, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:12:47,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-07-13 19:12:47,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 77. [2021-07-13 19:12:47,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.0) internal successors, (152), 76 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:47,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 152 transitions. [2021-07-13 19:12:47,600 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 152 transitions. Word has length 17 [2021-07-13 19:12:47,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:47,600 INFO L482 AbstractCegarLoop]: Abstraction has 77 states and 152 transitions. [2021-07-13 19:12:47,600 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 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) [2021-07-13 19:12:47,600 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 152 transitions. [2021-07-13 19:12:47,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:12:47,600 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:47,600 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:47,815 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:47,816 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:47,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:47,816 INFO L82 PathProgramCache]: Analyzing trace with hash -1810322992, now seen corresponding path program 42 times [2021-07-13 19:12:47,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:47,816 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456672938] [2021-07-13 19:12:47,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:47,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:47,896 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:47,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:47,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456672938] [2021-07-13 19:12:47,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456672938] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:47,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307462568] [2021-07-13 19:12:47,897 INFO L93 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 [2021-07-13 19:12:47,917 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:12:47,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:47,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:12:47,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:48,098 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:48,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307462568] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:48,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:48,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 19:12:48,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562389513] [2021-07-13 19:12:48,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:12:48,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:48,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:12:48,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:12:48,099 INFO L87 Difference]: Start difference. First operand 77 states and 152 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) 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) [2021-07-13 19:12:48,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:48,405 INFO L93 Difference]: Finished difference Result 127 states and 236 transitions. [2021-07-13 19:12:48,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:12:48,406 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) 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 17 [2021-07-13 19:12:48,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:48,406 INFO L225 Difference]: With dead ends: 127 [2021-07-13 19:12:48,406 INFO L226 Difference]: Without dead ends: 113 [2021-07-13 19:12:48,407 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 342.4ms TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:12:48,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-07-13 19:12:48,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 84. [2021-07-13 19:12:48,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.9879518072289157) internal successors, (165), 83 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) [2021-07-13 19:12:48,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 165 transitions. [2021-07-13 19:12:48,409 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 165 transitions. Word has length 17 [2021-07-13 19:12:48,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:48,409 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 165 transitions. [2021-07-13 19:12:48,409 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) 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) [2021-07-13 19:12:48,409 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 165 transitions. [2021-07-13 19:12:48,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:12:48,409 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:48,409 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:48,634 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-07-13 19:12:48,634 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:48,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:48,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1561329620, now seen corresponding path program 43 times [2021-07-13 19:12:48,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:48,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611369590] [2021-07-13 19:12:48,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:48,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:48,718 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:48,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:48,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611369590] [2021-07-13 19:12:48,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611369590] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:48,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432974509] [2021-07-13 19:12:48,718 INFO 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 [2021-07-13 19:12:48,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:48,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:12:48,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:48,877 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:48,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432974509] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:48,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:48,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:12:48,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108351134] [2021-07-13 19:12:48,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:12:48,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:48,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:12:48,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:12:48,878 INFO L87 Difference]: Start difference. First operand 84 states and 165 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:49,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:49,211 INFO L93 Difference]: Finished difference Result 163 states and 312 transitions. [2021-07-13 19:12:49,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:12:49,212 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have 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 [2021-07-13 19:12:49,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:49,212 INFO L225 Difference]: With dead ends: 163 [2021-07-13 19:12:49,212 INFO L226 Difference]: Without dead ends: 156 [2021-07-13 19:12:49,213 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 341.7ms TimeCoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:12:49,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-07-13 19:12:49,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 87. [2021-07-13 19:12:49,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 2.046511627906977) internal successors, (176), 86 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:49,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 176 transitions. [2021-07-13 19:12:49,215 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 176 transitions. Word has length 17 [2021-07-13 19:12:49,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:49,215 INFO L482 AbstractCegarLoop]: Abstraction has 87 states and 176 transitions. [2021-07-13 19:12:49,215 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:49,216 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 176 transitions. [2021-07-13 19:12:49,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:12:49,216 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:49,216 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:49,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-07-13 19:12:49,425 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:49,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:49,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1576790416, now seen corresponding path program 44 times [2021-07-13 19:12:49,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:49,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489789368] [2021-07-13 19:12:49,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:49,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:49,512 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:49,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:49,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489789368] [2021-07-13 19:12:49,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489789368] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:49,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585877761] [2021-07-13 19:12:49,512 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 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 [2021-07-13 19:12:49,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:12:49,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:49,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:12:49,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:49,708 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:49,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585877761] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:49,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:49,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:12:49,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634856075] [2021-07-13 19:12:49,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:12:49,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:49,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:12:49,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:12:49,709 INFO L87 Difference]: Start difference. First operand 87 states and 176 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:50,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:50,135 INFO L93 Difference]: Finished difference Result 175 states and 333 transitions. [2021-07-13 19:12:50,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:12:50,135 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have 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 [2021-07-13 19:12:50,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:50,136 INFO L225 Difference]: With dead ends: 175 [2021-07-13 19:12:50,136 INFO L226 Difference]: Without dead ends: 168 [2021-07-13 19:12:50,137 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 433.3ms TimeCoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:12:50,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-07-13 19:12:50,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 86. [2021-07-13 19:12:50,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.023529411764706) internal successors, (172), 85 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:50,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 172 transitions. [2021-07-13 19:12:50,139 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 172 transitions. Word has length 17 [2021-07-13 19:12:50,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:50,139 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 172 transitions. [2021-07-13 19:12:50,139 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:50,139 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 172 transitions. [2021-07-13 19:12:50,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:12:50,140 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:50,140 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:50,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:50,349 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:50,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:50,349 INFO L82 PathProgramCache]: Analyzing trace with hash -2146722074, now seen corresponding path program 45 times [2021-07-13 19:12:50,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:50,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97402001] [2021-07-13 19:12:50,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:50,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:50,465 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:50,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:50,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97402001] [2021-07-13 19:12:50,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97402001] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:50,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720081650] [2021-07-13 19:12:50,466 INFO L93 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 [2021-07-13 19:12:50,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:12:50,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:50,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:12:50,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:50,666 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:50,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720081650] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:50,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:50,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:12:50,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937792093] [2021-07-13 19:12:50,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:12:50,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:50,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:12:50,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:12:50,667 INFO L87 Difference]: Start difference. First operand 86 states and 172 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:51,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:51,088 INFO L93 Difference]: Finished difference Result 138 states and 262 transitions. [2021-07-13 19:12:51,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:12:51,089 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have 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 [2021-07-13 19:12:51,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:51,089 INFO L225 Difference]: With dead ends: 138 [2021-07-13 19:12:51,089 INFO L226 Difference]: Without dead ends: 131 [2021-07-13 19:12:51,090 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 445.5ms TimeCoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:12:51,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-07-13 19:12:51,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 86. [2021-07-13 19:12:51,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.023529411764706) internal successors, (172), 85 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:51,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 172 transitions. [2021-07-13 19:12:51,092 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 172 transitions. Word has length 17 [2021-07-13 19:12:51,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:51,092 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 172 transitions. [2021-07-13 19:12:51,092 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:51,092 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 172 transitions. [2021-07-13 19:12:51,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:12:51,093 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:51,093 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:51,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-07-13 19:12:51,309 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:51,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:51,309 INFO L82 PathProgramCache]: Analyzing trace with hash -709306540, now seen corresponding path program 46 times [2021-07-13 19:12:51,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:51,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243259876] [2021-07-13 19:12:51,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:51,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:51,397 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:51,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:51,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243259876] [2021-07-13 19:12:51,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243259876] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:51,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669574187] [2021-07-13 19:12:51,398 INFO L93 rtionOrderModulation]: Changing 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 [2021-07-13 19:12:51,427 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:12:51,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:51,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:12:51,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:51,566 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:51,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669574187] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:51,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:51,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:12:51,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568226158] [2021-07-13 19:12:51,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:12:51,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:51,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:12:51,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:12:51,567 INFO L87 Difference]: Start difference. First operand 86 states and 172 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:51,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:51,819 INFO L93 Difference]: Finished difference Result 145 states and 268 transitions. [2021-07-13 19:12:51,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:12:51,820 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have 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 [2021-07-13 19:12:51,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:51,821 INFO L225 Difference]: With dead ends: 145 [2021-07-13 19:12:51,821 INFO L226 Difference]: Without dead ends: 131 [2021-07-13 19:12:51,821 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 298.0ms TimeCoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:12:51,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-07-13 19:12:51,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 96. [2021-07-13 19:12:51,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.0526315789473686) internal successors, (195), 95 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:51,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 195 transitions. [2021-07-13 19:12:51,823 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 195 transitions. Word has length 17 [2021-07-13 19:12:51,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:51,823 INFO L482 AbstractCegarLoop]: Abstraction has 96 states and 195 transitions. [2021-07-13 19:12:51,823 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:51,824 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 195 transitions. [2021-07-13 19:12:51,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:12:51,824 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:51,824 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:52,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:52,033 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:52,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:52,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1092026928, now seen corresponding path program 47 times [2021-07-13 19:12:52,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:52,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226285240] [2021-07-13 19:12:52,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:52,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:52,124 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:52,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:52,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226285240] [2021-07-13 19:12:52,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226285240] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:52,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712145674] [2021-07-13 19:12:52,125 INFO L93 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 [2021-07-13 19:12:52,157 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:12:52,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:52,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:12:52,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:52,341 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:52,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712145674] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:52,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:52,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:12:52,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638046388] [2021-07-13 19:12:52,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:12:52,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:52,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:12:52,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:12:52,343 INFO L87 Difference]: Start difference. First operand 96 states and 195 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:52,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:52,662 INFO L93 Difference]: Finished difference Result 134 states and 261 transitions. [2021-07-13 19:12:52,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:12:52,663 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have 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 [2021-07-13 19:12:52,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:52,663 INFO L225 Difference]: With dead ends: 134 [2021-07-13 19:12:52,663 INFO L226 Difference]: Without dead ends: 127 [2021-07-13 19:12:52,664 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 354.7ms TimeCoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:12:52,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-07-13 19:12:52,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 97. [2021-07-13 19:12:52,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.0625) internal successors, (198), 96 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:52,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 198 transitions. [2021-07-13 19:12:52,666 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 198 transitions. Word has length 17 [2021-07-13 19:12:52,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:52,666 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 198 transitions. [2021-07-13 19:12:52,666 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:52,666 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 198 transitions. [2021-07-13 19:12:52,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:12:52,667 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:52,667 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:52,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-07-13 19:12:52,881 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:52,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:52,881 INFO L82 PathProgramCache]: Analyzing trace with hash 987266900, now seen corresponding path program 48 times [2021-07-13 19:12:52,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:52,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756291505] [2021-07-13 19:12:52,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:52,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:52,963 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:52,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:52,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756291505] [2021-07-13 19:12:52,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756291505] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:52,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435201791] [2021-07-13 19:12:52,963 INFO L93 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 [2021-07-13 19:12:52,984 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:12:52,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:52,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:12:52,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:53,128 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:53,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435201791] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:53,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:53,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:12:53,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612292910] [2021-07-13 19:12:53,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:12:53,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:53,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:12:53,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:12:53,129 INFO L87 Difference]: Start difference. First operand 97 states and 198 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:53,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:53,522 INFO L93 Difference]: Finished difference Result 175 states and 338 transitions. [2021-07-13 19:12:53,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:12:53,522 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have 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 [2021-07-13 19:12:53,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:53,522 INFO L225 Difference]: With dead ends: 175 [2021-07-13 19:12:53,522 INFO L226 Difference]: Without dead ends: 168 [2021-07-13 19:12:53,523 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 396.9ms TimeCoverageRelationStatistics Valid=123, Invalid=477, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:12:53,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-07-13 19:12:53,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 98. [2021-07-13 19:12:53,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.082474226804124) internal successors, (202), 97 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) [2021-07-13 19:12:53,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 202 transitions. [2021-07-13 19:12:53,524 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 202 transitions. Word has length 17 [2021-07-13 19:12:53,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:53,525 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 202 transitions. [2021-07-13 19:12:53,525 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:53,525 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 202 transitions. [2021-07-13 19:12:53,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:12:53,525 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:53,525 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:53,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-07-13 19:12:53,726 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:53,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:53,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1002727696, now seen corresponding path program 49 times [2021-07-13 19:12:53,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:53,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732286214] [2021-07-13 19:12:53,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:53,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:53,819 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:53,820 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:53,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732286214] [2021-07-13 19:12:53,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732286214] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:53,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412484948] [2021-07-13 19:12:53,820 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:12:53,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:53,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:12:53,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:53,985 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:53,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412484948] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:53,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:53,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:12:53,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333636319] [2021-07-13 19:12:53,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:12:53,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:53,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:12:53,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:12:53,986 INFO L87 Difference]: Start difference. First operand 98 states and 202 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:54,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:54,343 INFO L93 Difference]: Finished difference Result 165 states and 325 transitions. [2021-07-13 19:12:54,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:12:54,343 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have 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 [2021-07-13 19:12:54,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:54,344 INFO L225 Difference]: With dead ends: 165 [2021-07-13 19:12:54,344 INFO L226 Difference]: Without dead ends: 158 [2021-07-13 19:12:54,344 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 333.8ms TimeCoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:12:54,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-07-13 19:12:54,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 96. [2021-07-13 19:12:54,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.0526315789473686) internal successors, (195), 95 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:54,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 195 transitions. [2021-07-13 19:12:54,346 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 195 transitions. Word has length 17 [2021-07-13 19:12:54,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:54,347 INFO L482 AbstractCegarLoop]: Abstraction has 96 states and 195 transitions. [2021-07-13 19:12:54,347 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:54,347 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 195 transitions. [2021-07-13 19:12:54,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:12:54,347 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:54,347 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:54,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:54,561 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:54,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:54,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1610389644, now seen corresponding path program 50 times [2021-07-13 19:12:54,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:54,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258867760] [2021-07-13 19:12:54,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:54,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:54,642 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:54,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:54,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258867760] [2021-07-13 19:12:54,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258867760] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:54,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114276690] [2021-07-13 19:12:54,642 INFO L93 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 [2021-07-13 19:12:54,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:12:54,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:54,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:12:54,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:54,803 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:54,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114276690] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:54,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:54,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:12:54,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34093936] [2021-07-13 19:12:54,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:12:54,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:54,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:12:54,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:12:54,804 INFO L87 Difference]: Start difference. First operand 96 states and 195 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:55,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:55,211 INFO L93 Difference]: Finished difference Result 162 states and 306 transitions. [2021-07-13 19:12:55,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:12:55,211 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have 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 [2021-07-13 19:12:55,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:55,212 INFO L225 Difference]: With dead ends: 162 [2021-07-13 19:12:55,212 INFO L226 Difference]: Without dead ends: 148 [2021-07-13 19:12:55,212 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 423.1ms TimeCoverageRelationStatistics Valid=148, Invalid=608, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:12:55,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-07-13 19:12:55,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 101. [2021-07-13 19:12:55,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.02) internal successors, (202), 100 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) [2021-07-13 19:12:55,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 202 transitions. [2021-07-13 19:12:55,214 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 202 transitions. Word has length 17 [2021-07-13 19:12:55,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:55,215 INFO L482 AbstractCegarLoop]: Abstraction has 101 states and 202 transitions. [2021-07-13 19:12:55,215 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:55,215 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 202 transitions. [2021-07-13 19:12:55,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:12:55,215 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:55,215 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:55,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-07-13 19:12:55,425 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:55,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:55,425 INFO L82 PathProgramCache]: Analyzing trace with hash -79334396, now seen corresponding path program 51 times [2021-07-13 19:12:55,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:55,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097417008] [2021-07-13 19:12:55,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:55,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:55,506 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:55,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:55,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097417008] [2021-07-13 19:12:55,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097417008] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:55,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676633403] [2021-07-13 19:12:55,507 INFO L93 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 [2021-07-13 19:12:55,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:12:55,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:55,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:12:55,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:55,756 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:55,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676633403] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:55,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:55,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:12:55,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735661144] [2021-07-13 19:12:55,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:12:55,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:55,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:12:55,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:12:55,757 INFO L87 Difference]: Start difference. First operand 101 states and 202 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:55,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:55,944 INFO L93 Difference]: Finished difference Result 121 states and 234 transitions. [2021-07-13 19:12:55,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:12:55,945 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have 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 [2021-07-13 19:12:55,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:55,945 INFO L225 Difference]: With dead ends: 121 [2021-07-13 19:12:55,945 INFO L226 Difference]: Without dead ends: 114 [2021-07-13 19:12:55,945 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 299.9ms TimeCoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:12:55,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-07-13 19:12:55,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 97. [2021-07-13 19:12:55,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.0208333333333335) internal successors, (194), 96 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) [2021-07-13 19:12:55,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 194 transitions. [2021-07-13 19:12:55,947 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 194 transitions. Word has length 17 [2021-07-13 19:12:55,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:55,947 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 194 transitions. [2021-07-13 19:12:55,947 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:55,947 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 194 transitions. [2021-07-13 19:12:55,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:12:55,947 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:55,947 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:56,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:56,148 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:56,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:56,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1999959432, now seen corresponding path program 52 times [2021-07-13 19:12:56,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:56,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057964437] [2021-07-13 19:12:56,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:56,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:56,235 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:56,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:56,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057964437] [2021-07-13 19:12:56,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057964437] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:56,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57006723] [2021-07-13 19:12:56,236 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 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 [2021-07-13 19:12:56,259 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:12:56,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:56,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:12:56,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:56,439 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:56,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57006723] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:56,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:56,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:12:56,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530277502] [2021-07-13 19:12:56,440 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:12:56,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:56,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:12:56,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:12:56,440 INFO L87 Difference]: Start difference. First operand 97 states and 194 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:56,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:56,777 INFO L93 Difference]: Finished difference Result 160 states and 307 transitions. [2021-07-13 19:12:56,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:12:56,778 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have 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 [2021-07-13 19:12:56,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:56,778 INFO L225 Difference]: With dead ends: 160 [2021-07-13 19:12:56,778 INFO L226 Difference]: Without dead ends: 153 [2021-07-13 19:12:56,778 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 391.4ms TimeCoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:12:56,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-07-13 19:12:56,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 98. [2021-07-13 19:12:56,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.0412371134020617) internal successors, (198), 97 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:56,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 198 transitions. [2021-07-13 19:12:56,781 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 198 transitions. Word has length 17 [2021-07-13 19:12:56,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:56,781 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 198 transitions. [2021-07-13 19:12:56,781 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:56,781 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 198 transitions. [2021-07-13 19:12:56,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:12:56,781 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:56,781 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:57,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-07-13 19:12:57,005 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:57,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:57,005 INFO L82 PathProgramCache]: Analyzing trace with hash 2015420228, now seen corresponding path program 53 times [2021-07-13 19:12:57,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:57,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846996799] [2021-07-13 19:12:57,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:57,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:57,084 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:57,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:57,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846996799] [2021-07-13 19:12:57,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846996799] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:57,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566201601] [2021-07-13 19:12:57,085 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:12:57,105 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:12:57,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:57,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:12:57,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:57,263 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:57,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566201601] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:57,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:57,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:12:57,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8508890] [2021-07-13 19:12:57,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:12:57,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:57,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:12:57,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:12:57,265 INFO L87 Difference]: Start difference. First operand 98 states and 198 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:57,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:57,556 INFO L93 Difference]: Finished difference Result 152 states and 297 transitions. [2021-07-13 19:12:57,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:12:57,557 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have 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 [2021-07-13 19:12:57,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:57,557 INFO L225 Difference]: With dead ends: 152 [2021-07-13 19:12:57,557 INFO L226 Difference]: Without dead ends: 145 [2021-07-13 19:12:57,558 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 315.2ms TimeCoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:12:57,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-07-13 19:12:57,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 96. [2021-07-13 19:12:57,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.0105263157894737) internal successors, (191), 95 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:57,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 191 transitions. [2021-07-13 19:12:57,563 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 191 transitions. Word has length 17 [2021-07-13 19:12:57,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:57,563 INFO L482 AbstractCegarLoop]: Abstraction has 96 states and 191 transitions. [2021-07-13 19:12:57,563 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:57,563 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 191 transitions. [2021-07-13 19:12:57,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:12:57,564 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:57,564 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:57,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-07-13 19:12:57,777 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:57,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:57,777 INFO L82 PathProgramCache]: Analyzing trace with hash -148837104, now seen corresponding path program 54 times [2021-07-13 19:12:57,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:57,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119253601] [2021-07-13 19:12:57,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:57,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:57,869 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:57,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:57,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119253601] [2021-07-13 19:12:57,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119253601] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:57,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532308304] [2021-07-13 19:12:57,869 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:12:57,889 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:12:57,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:57,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:12:57,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:58,018 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:58,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532308304] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:58,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:58,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:12:58,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069688831] [2021-07-13 19:12:58,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:12:58,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:58,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:12:58,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:12:58,020 INFO L87 Difference]: Start difference. First operand 96 states and 191 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:58,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:58,246 INFO L93 Difference]: Finished difference Result 155 states and 299 transitions. [2021-07-13 19:12:58,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:12:58,246 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have 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 [2021-07-13 19:12:58,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:58,247 INFO L225 Difference]: With dead ends: 155 [2021-07-13 19:12:58,247 INFO L226 Difference]: Without dead ends: 148 [2021-07-13 19:12:58,247 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 258.8ms TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:12:58,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-07-13 19:12:58,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 98. [2021-07-13 19:12:58,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.0412371134020617) internal successors, (198), 97 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:58,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 198 transitions. [2021-07-13 19:12:58,249 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 198 transitions. Word has length 17 [2021-07-13 19:12:58,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:58,249 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 198 transitions. [2021-07-13 19:12:58,249 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:58,249 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 198 transitions. [2021-07-13 19:12:58,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:12:58,249 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:58,249 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:58,450 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:58,450 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:58,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:58,450 INFO L82 PathProgramCache]: Analyzing trace with hash -133376308, now seen corresponding path program 55 times [2021-07-13 19:12:58,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:58,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734871897] [2021-07-13 19:12:58,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:58,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:58,541 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:58,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:58,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734871897] [2021-07-13 19:12:58,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734871897] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:58,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13869728] [2021-07-13 19:12:58,541 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:12:58,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:58,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:12:58,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:58,723 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:58,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13869728] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:58,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:58,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:12:58,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715767315] [2021-07-13 19:12:58,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:12:58,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:58,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:12:58,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:12:58,724 INFO L87 Difference]: Start difference. First operand 98 states and 198 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:59,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:59,000 INFO L93 Difference]: Finished difference Result 167 states and 320 transitions. [2021-07-13 19:12:59,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:12:59,000 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have 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 [2021-07-13 19:12:59,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:59,001 INFO L225 Difference]: With dead ends: 167 [2021-07-13 19:12:59,001 INFO L226 Difference]: Without dead ends: 160 [2021-07-13 19:12:59,001 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 302.8ms TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:12:59,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-07-13 19:12:59,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 97. [2021-07-13 19:12:59,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.0208333333333335) internal successors, (194), 96 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) [2021-07-13 19:12:59,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 194 transitions. [2021-07-13 19:12:59,005 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 194 transitions. Word has length 17 [2021-07-13 19:12:59,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:59,005 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 194 transitions. [2021-07-13 19:12:59,005 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:59,005 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 194 transitions. [2021-07-13 19:12:59,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:12:59,006 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:59,006 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:59,206 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:59,207 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:59,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:59,207 INFO L82 PathProgramCache]: Analyzing trace with hash 438078498, now seen corresponding path program 56 times [2021-07-13 19:12:59,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:59,207 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382789550] [2021-07-13 19:12:59,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:59,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:59,294 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:59,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:59,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382789550] [2021-07-13 19:12:59,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382789550] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:59,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197611083] [2021-07-13 19:12:59,294 INFO L93 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 [2021-07-13 19:12:59,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:12:59,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:59,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:12:59,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:59,485 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:59,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197611083] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:59,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:59,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-07-13 19:12:59,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155926213] [2021-07-13 19:12:59,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:12:59,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:59,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:12:59,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:12:59,486 INFO L87 Difference]: Start difference. First operand 97 states and 194 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:59,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:59,734 INFO L93 Difference]: Finished difference Result 128 states and 247 transitions. [2021-07-13 19:12:59,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:12:59,734 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have 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 [2021-07-13 19:12:59,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:59,735 INFO L225 Difference]: With dead ends: 128 [2021-07-13 19:12:59,735 INFO L226 Difference]: Without dead ends: 121 [2021-07-13 19:12:59,735 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 305.0ms TimeCoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:12:59,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-07-13 19:12:59,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 97. [2021-07-13 19:12:59,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.0208333333333335) internal successors, (194), 96 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) [2021-07-13 19:12:59,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 194 transitions. [2021-07-13 19:12:59,737 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 194 transitions. Word has length 17 [2021-07-13 19:12:59,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:59,737 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 194 transitions. [2021-07-13 19:12:59,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:59,737 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 194 transitions. [2021-07-13 19:12:59,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:12:59,738 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:59,738 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:12:59,961 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:59,961 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:59,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:59,961 INFO L82 PathProgramCache]: Analyzing trace with hash 984287384, now seen corresponding path program 57 times [2021-07-13 19:12:59,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:59,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89334611] [2021-07-13 19:12:59,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:59,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:00,032 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:00,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:00,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89334611] [2021-07-13 19:13:00,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89334611] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:00,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080680246] [2021-07-13 19:13:00,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:13:00,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:13:00,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:00,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:13:00,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:00,207 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:00,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080680246] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:00,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:00,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 19:13:00,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713704099] [2021-07-13 19:13:00,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:13:00,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:00,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:13:00,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:13:00,208 INFO L87 Difference]: Start difference. First operand 97 states and 194 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) 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) [2021-07-13 19:13:00,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:00,477 INFO L93 Difference]: Finished difference Result 163 states and 297 transitions. [2021-07-13 19:13:00,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:13:00,477 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) 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 17 [2021-07-13 19:13:00,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:00,478 INFO L225 Difference]: With dead ends: 163 [2021-07-13 19:13:00,478 INFO L226 Difference]: Without dead ends: 149 [2021-07-13 19:13:00,478 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 308.5ms TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:13:00,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-07-13 19:13:00,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 103. [2021-07-13 19:13:00,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.0294117647058822) internal successors, (207), 102 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) [2021-07-13 19:13:00,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 207 transitions. [2021-07-13 19:13:00,480 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 207 transitions. Word has length 17 [2021-07-13 19:13:00,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:00,480 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 207 transitions. [2021-07-13 19:13:00,480 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) 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) [2021-07-13 19:13:00,480 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 207 transitions. [2021-07-13 19:13:00,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:13:00,481 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:00,481 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:00,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:00,685 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:00,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:00,685 INFO L82 PathProgramCache]: Analyzing trace with hash 601566996, now seen corresponding path program 58 times [2021-07-13 19:13:00,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:00,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272580224] [2021-07-13 19:13:00,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:00,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:00,770 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:00,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:00,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272580224] [2021-07-13 19:13:00,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272580224] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:00,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073198277] [2021-07-13 19:13:00,770 INFO L93 rtionOrderModulation]: Changing 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 [2021-07-13 19:13:00,790 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:13:00,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:00,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:13:00,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:00,966 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:00,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073198277] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:00,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:00,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 19:13:00,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613385631] [2021-07-13 19:13:00,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:13:00,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:00,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:13:00,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:13:00,968 INFO L87 Difference]: Start difference. First operand 103 states and 207 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) 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) [2021-07-13 19:13:01,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:01,307 INFO L93 Difference]: Finished difference Result 144 states and 280 transitions. [2021-07-13 19:13:01,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:13:01,308 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) 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 17 [2021-07-13 19:13:01,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:01,308 INFO L225 Difference]: With dead ends: 144 [2021-07-13 19:13:01,308 INFO L226 Difference]: Without dead ends: 137 [2021-07-13 19:13:01,309 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 394.4ms TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:13:01,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-07-13 19:13:01,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 104. [2021-07-13 19:13:01,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.0388349514563107) internal successors, (210), 103 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) [2021-07-13 19:13:01,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 210 transitions. [2021-07-13 19:13:01,310 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 210 transitions. Word has length 17 [2021-07-13 19:13:01,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:01,310 INFO L482 AbstractCegarLoop]: Abstraction has 104 states and 210 transitions. [2021-07-13 19:13:01,311 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) 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) [2021-07-13 19:13:01,311 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 210 transitions. [2021-07-13 19:13:01,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:13:01,311 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:01,311 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:01,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:01,517 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:01,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:01,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1614106472, now seen corresponding path program 59 times [2021-07-13 19:13:01,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:01,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907977527] [2021-07-13 19:13:01,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:01,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:01,597 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:01,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:01,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907977527] [2021-07-13 19:13:01,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907977527] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:01,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562145581] [2021-07-13 19:13:01,597 INFO L93 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 [2021-07-13 19:13:01,618 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:13:01,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:01,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:13:01,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:01,788 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:01,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562145581] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:01,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:01,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 19:13:01,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422202075] [2021-07-13 19:13:01,789 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:13:01,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:01,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:13:01,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:13:01,789 INFO L87 Difference]: Start difference. First operand 104 states and 210 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) 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) [2021-07-13 19:13:02,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:02,289 INFO L93 Difference]: Finished difference Result 190 states and 368 transitions. [2021-07-13 19:13:02,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:13:02,290 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) 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 17 [2021-07-13 19:13:02,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:02,290 INFO L225 Difference]: With dead ends: 190 [2021-07-13 19:13:02,290 INFO L226 Difference]: Without dead ends: 183 [2021-07-13 19:13:02,291 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 425.2ms TimeCoverageRelationStatistics Valid=134, Invalid=568, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:13:02,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-07-13 19:13:02,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 105. [2021-07-13 19:13:02,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.0576923076923075) internal successors, (214), 104 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) [2021-07-13 19:13:02,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 214 transitions. [2021-07-13 19:13:02,292 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 214 transitions. Word has length 17 [2021-07-13 19:13:02,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:02,293 INFO L482 AbstractCegarLoop]: Abstraction has 105 states and 214 transitions. [2021-07-13 19:13:02,293 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) 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) [2021-07-13 19:13:02,293 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 214 transitions. [2021-07-13 19:13:02,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:13:02,293 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:02,293 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:02,494 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-07-13 19:13:02,494 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:02,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:02,494 INFO L82 PathProgramCache]: Analyzing trace with hash -1598645676, now seen corresponding path program 60 times [2021-07-13 19:13:02,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:02,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784205545] [2021-07-13 19:13:02,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:02,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:02,574 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:02,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:02,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784205545] [2021-07-13 19:13:02,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784205545] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:02,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125317559] [2021-07-13 19:13:02,575 INFO L93 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 [2021-07-13 19:13:02,595 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:13:02,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:02,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:13:02,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:02,748 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:02,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125317559] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:02,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:02,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 19:13:02,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416494082] [2021-07-13 19:13:02,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:13:02,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:02,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:13:02,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:13:02,749 INFO L87 Difference]: Start difference. First operand 105 states and 214 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) 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) [2021-07-13 19:13:03,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:03,195 INFO L93 Difference]: Finished difference Result 178 states and 352 transitions. [2021-07-13 19:13:03,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:13:03,196 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) 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 17 [2021-07-13 19:13:03,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:03,197 INFO L225 Difference]: With dead ends: 178 [2021-07-13 19:13:03,197 INFO L226 Difference]: Without dead ends: 171 [2021-07-13 19:13:03,197 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 377.6ms TimeCoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:13:03,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-07-13 19:13:03,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 102. [2021-07-13 19:13:03,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.00990099009901) internal successors, (203), 101 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) [2021-07-13 19:13:03,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 203 transitions. [2021-07-13 19:13:03,199 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 203 transitions. Word has length 17 [2021-07-13 19:13:03,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:03,199 INFO L482 AbstractCegarLoop]: Abstraction has 102 states and 203 transitions. [2021-07-13 19:13:03,199 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) 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) [2021-07-13 19:13:03,199 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 203 transitions. [2021-07-13 19:13:03,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:13:03,200 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:03,200 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:03,423 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-07-13 19:13:03,424 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:03,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:03,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1614259528, now seen corresponding path program 61 times [2021-07-13 19:13:03,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:03,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232313201] [2021-07-13 19:13:03,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:03,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:03,512 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:03,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:03,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232313201] [2021-07-13 19:13:03,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232313201] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:03,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996630363] [2021-07-13 19:13:03,513 INFO 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 [2021-07-13 19:13:03,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:03,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:13:03,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:03,736 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:03,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996630363] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:03,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:03,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 19:13:03,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86688402] [2021-07-13 19:13:03,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:13:03,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:03,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:13:03,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:13:03,738 INFO L87 Difference]: Start difference. First operand 102 states and 203 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) 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) [2021-07-13 19:13:03,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:03,988 INFO L93 Difference]: Finished difference Result 130 states and 252 transitions. [2021-07-13 19:13:03,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:13:03,988 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) 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 17 [2021-07-13 19:13:03,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:03,989 INFO L225 Difference]: With dead ends: 130 [2021-07-13 19:13:03,989 INFO L226 Difference]: Without dead ends: 123 [2021-07-13 19:13:03,989 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 336.5ms TimeCoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:13:03,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-07-13 19:13:03,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 104. [2021-07-13 19:13:03,991 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) [2021-07-13 19:13:03,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 208 transitions. [2021-07-13 19:13:03,991 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 208 transitions. Word has length 17 [2021-07-13 19:13:03,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:03,991 INFO L482 AbstractCegarLoop]: Abstraction has 104 states and 208 transitions. [2021-07-13 19:13:03,991 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) 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) [2021-07-13 19:13:03,991 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 208 transitions. [2021-07-13 19:13:03,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:13:03,992 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:03,992 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:04,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:04,201 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:04,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:04,201 INFO L82 PathProgramCache]: Analyzing trace with hash -601413940, now seen corresponding path program 62 times [2021-07-13 19:13:04,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:04,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748754313] [2021-07-13 19:13:04,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:04,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:04,287 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:04,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:04,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748754313] [2021-07-13 19:13:04,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748754313] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:04,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975795445] [2021-07-13 19:13:04,288 INFO L93 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 [2021-07-13 19:13:04,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:13:04,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:04,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:13:04,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:04,516 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:04,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975795445] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:04,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:04,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 19:13:04,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721779831] [2021-07-13 19:13:04,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:13:04,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:04,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:13:04,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:13:04,519 INFO L87 Difference]: Start difference. First operand 104 states and 208 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) 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) [2021-07-13 19:13:04,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:04,871 INFO L93 Difference]: Finished difference Result 174 states and 336 transitions. [2021-07-13 19:13:04,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:13:04,871 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) 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 17 [2021-07-13 19:13:04,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:04,872 INFO L225 Difference]: With dead ends: 174 [2021-07-13 19:13:04,872 INFO L226 Difference]: Without dead ends: 167 [2021-07-13 19:13:04,872 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 417.0ms TimeCoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:13:04,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-07-13 19:13:04,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 105. [2021-07-13 19:13:04,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.0384615384615383) internal successors, (212), 104 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:04,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 212 transitions. [2021-07-13 19:13:04,877 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 212 transitions. Word has length 17 [2021-07-13 19:13:04,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:04,877 INFO L482 AbstractCegarLoop]: Abstraction has 105 states and 212 transitions. [2021-07-13 19:13:04,877 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) 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) [2021-07-13 19:13:04,877 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 212 transitions. [2021-07-13 19:13:04,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:13:04,878 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:04,878 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:05,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-07-13 19:13:05,093 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:05,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:05,093 INFO L82 PathProgramCache]: Analyzing trace with hash -585953144, now seen corresponding path program 63 times [2021-07-13 19:13:05,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:05,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553753976] [2021-07-13 19:13:05,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:05,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:05,173 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:05,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:05,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553753976] [2021-07-13 19:13:05,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553753976] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:05,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186876271] [2021-07-13 19:13:05,173 INFO L93 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 [2021-07-13 19:13:05,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:13:05,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:05,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:13:05,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:05,337 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:05,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186876271] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:05,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:05,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 19:13:05,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632508343] [2021-07-13 19:13:05,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:13:05,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:05,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:13:05,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:13:05,338 INFO L87 Difference]: Start difference. First operand 105 states and 212 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) 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) [2021-07-13 19:13:05,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:05,630 INFO L93 Difference]: Finished difference Result 164 states and 323 transitions. [2021-07-13 19:13:05,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:13:05,630 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) 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 17 [2021-07-13 19:13:05,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:05,631 INFO L225 Difference]: With dead ends: 164 [2021-07-13 19:13:05,631 INFO L226 Difference]: Without dead ends: 157 [2021-07-13 19:13:05,631 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 319.7ms TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:13:05,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-07-13 19:13:05,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 103. [2021-07-13 19:13:05,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.0098039215686274) internal successors, (205), 102 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) [2021-07-13 19:13:05,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 205 transitions. [2021-07-13 19:13:05,633 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 205 transitions. Word has length 17 [2021-07-13 19:13:05,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:05,633 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 205 transitions. [2021-07-13 19:13:05,633 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) 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) [2021-07-13 19:13:05,633 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 205 transitions. [2021-07-13 19:13:05,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:13:05,634 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:05,634 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:05,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-07-13 19:13:05,841 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:05,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:05,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1544756820, now seen corresponding path program 64 times [2021-07-13 19:13:05,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:05,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832913293] [2021-07-13 19:13:05,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:05,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:05,921 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:05,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:05,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832913293] [2021-07-13 19:13:05,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832913293] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:05,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578175247] [2021-07-13 19:13:05,922 INFO L93 rtionOrderModulation]: Changing 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 [2021-07-13 19:13:05,942 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:13:05,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:05,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:13:05,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:06,088 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:06,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578175247] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:06,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:06,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 19:13:06,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647298424] [2021-07-13 19:13:06,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:13:06,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:06,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:13:06,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:13:06,090 INFO L87 Difference]: Start difference. First operand 103 states and 205 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) 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) [2021-07-13 19:13:06,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:06,366 INFO L93 Difference]: Finished difference Result 172 states and 333 transitions. [2021-07-13 19:13:06,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:13:06,366 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) 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 17 [2021-07-13 19:13:06,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:06,367 INFO L225 Difference]: With dead ends: 172 [2021-07-13 19:13:06,367 INFO L226 Difference]: Without dead ends: 165 [2021-07-13 19:13:06,368 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 295.7ms TimeCoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:13:06,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-07-13 19:13:06,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 105. [2021-07-13 19:13:06,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.0384615384615383) internal successors, (212), 104 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:06,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 212 transitions. [2021-07-13 19:13:06,370 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 212 transitions. Word has length 17 [2021-07-13 19:13:06,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:06,370 INFO L482 AbstractCegarLoop]: Abstraction has 105 states and 212 transitions. [2021-07-13 19:13:06,370 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) 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) [2021-07-13 19:13:06,370 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 212 transitions. [2021-07-13 19:13:06,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:13:06,371 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:06,371 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:06,571 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2021-07-13 19:13:06,571 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:06,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:06,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1560217616, now seen corresponding path program 65 times [2021-07-13 19:13:06,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:06,572 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633111720] [2021-07-13 19:13:06,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:06,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:06,657 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:06,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:06,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633111720] [2021-07-13 19:13:06,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633111720] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:06,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752828080] [2021-07-13 19:13:06,657 INFO L93 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 [2021-07-13 19:13:06,679 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:13:06,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:06,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:13:06,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:06,851 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:06,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752828080] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:06,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:06,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 19:13:06,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691316528] [2021-07-13 19:13:06,851 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:13:06,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:06,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:13:06,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:13:06,852 INFO L87 Difference]: Start difference. First operand 105 states and 212 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) 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) [2021-07-13 19:13:07,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:07,115 INFO L93 Difference]: Finished difference Result 186 states and 358 transitions. [2021-07-13 19:13:07,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:13:07,116 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) 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 17 [2021-07-13 19:13:07,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:07,116 INFO L225 Difference]: With dead ends: 186 [2021-07-13 19:13:07,117 INFO L226 Difference]: Without dead ends: 179 [2021-07-13 19:13:07,117 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 302.8ms TimeCoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:13:07,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-07-13 19:13:07,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 104. [2021-07-13 19:13:07,119 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) [2021-07-13 19:13:07,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 208 transitions. [2021-07-13 19:13:07,119 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 208 transitions. Word has length 17 [2021-07-13 19:13:07,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:07,119 INFO L482 AbstractCegarLoop]: Abstraction has 104 states and 208 transitions. [2021-07-13 19:13:07,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) 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) [2021-07-13 19:13:07,119 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 208 transitions. [2021-07-13 19:13:07,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:13:07,119 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:07,120 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:07,325 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:07,325 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:07,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:07,325 INFO L82 PathProgramCache]: Analyzing trace with hash 2131672422, now seen corresponding path program 66 times [2021-07-13 19:13:07,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:07,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933512675] [2021-07-13 19:13:07,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:07,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:07,415 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:07,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:07,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933512675] [2021-07-13 19:13:07,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933512675] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:07,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331870199] [2021-07-13 19:13:07,416 INFO L93 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 [2021-07-13 19:13:07,443 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:13:07,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:07,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:13:07,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:07,610 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:07,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331870199] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:07,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:07,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 19:13:07,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048053232] [2021-07-13 19:13:07,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:13:07,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:07,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:13:07,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:13:07,611 INFO L87 Difference]: Start difference. First operand 104 states and 208 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) 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) [2021-07-13 19:13:07,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:07,869 INFO L93 Difference]: Finished difference Result 143 states and 276 transitions. [2021-07-13 19:13:07,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:13:07,869 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) 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 17 [2021-07-13 19:13:07,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:07,870 INFO L225 Difference]: With dead ends: 143 [2021-07-13 19:13:07,870 INFO L226 Difference]: Without dead ends: 136 [2021-07-13 19:13:07,870 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 321.1ms TimeCoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:13:07,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-07-13 19:13:07,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 101. [2021-07-13 19:13:07,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.0) internal successors, (200), 100 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:07,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 200 transitions. [2021-07-13 19:13:07,872 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 200 transitions. Word has length 17 [2021-07-13 19:13:07,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:07,872 INFO L482 AbstractCegarLoop]: Abstraction has 101 states and 200 transitions. [2021-07-13 19:13:07,872 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) 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) [2021-07-13 19:13:07,872 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 200 transitions. [2021-07-13 19:13:07,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:13:07,873 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:07,873 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:08,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:08,089 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:08,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:08,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1794909488, now seen corresponding path program 67 times [2021-07-13 19:13:08,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:08,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661915740] [2021-07-13 19:13:08,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:08,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:08,173 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:08,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:08,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661915740] [2021-07-13 19:13:08,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661915740] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:08,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471462081] [2021-07-13 19:13:08,173 INFO 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 [2021-07-13 19:13:08,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:08,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:13:08,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:08,349 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:08,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471462081] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:08,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:08,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 19:13:08,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580449981] [2021-07-13 19:13:08,349 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:13:08,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:08,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:13:08,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:13:08,350 INFO L87 Difference]: Start difference. First operand 101 states and 200 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) 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) [2021-07-13 19:13:08,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:08,495 INFO L93 Difference]: Finished difference Result 111 states and 213 transitions. [2021-07-13 19:13:08,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:13:08,496 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) 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 17 [2021-07-13 19:13:08,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:08,496 INFO L225 Difference]: With dead ends: 111 [2021-07-13 19:13:08,496 INFO L226 Difference]: Without dead ends: 104 [2021-07-13 19:13:08,497 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 226.9ms TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:13:08,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-07-13 19:13:08,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 97. [2021-07-13 19:13:08,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.0) internal successors, (192), 96 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) [2021-07-13 19:13:08,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 192 transitions. [2021-07-13 19:13:08,499 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 192 transitions. Word has length 17 [2021-07-13 19:13:08,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:08,499 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 192 transitions. [2021-07-13 19:13:08,499 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) 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) [2021-07-13 19:13:08,499 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 192 transitions. [2021-07-13 19:13:08,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:13:08,500 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:08,500 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:08,723 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:08,723 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:08,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:08,723 INFO L82 PathProgramCache]: Analyzing trace with hash 284384340, now seen corresponding path program 68 times [2021-07-13 19:13:08,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:08,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120738666] [2021-07-13 19:13:08,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:08,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:08,801 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:08,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:08,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120738666] [2021-07-13 19:13:08,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120738666] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:08,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079582789] [2021-07-13 19:13:08,801 INFO L93 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 [2021-07-13 19:13:08,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:13:08,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:08,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:13:08,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:08,975 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:08,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079582789] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:08,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:08,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 19:13:08,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395431280] [2021-07-13 19:13:08,975 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:13:08,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:08,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:13:08,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:13:08,976 INFO L87 Difference]: Start difference. First operand 97 states and 192 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) 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) [2021-07-13 19:13:09,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:09,298 INFO L93 Difference]: Finished difference Result 144 states and 274 transitions. [2021-07-13 19:13:09,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:13:09,298 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) 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 17 [2021-07-13 19:13:09,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:09,299 INFO L225 Difference]: With dead ends: 144 [2021-07-13 19:13:09,299 INFO L226 Difference]: Without dead ends: 137 [2021-07-13 19:13:09,299 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 354.6ms TimeCoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:13:09,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-07-13 19:13:09,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 98. [2021-07-13 19:13:09,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.020618556701031) internal successors, (196), 97 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:09,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 196 transitions. [2021-07-13 19:13:09,301 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 196 transitions. Word has length 17 [2021-07-13 19:13:09,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:09,301 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 196 transitions. [2021-07-13 19:13:09,301 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) 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) [2021-07-13 19:13:09,301 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 196 transitions. [2021-07-13 19:13:09,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:13:09,304 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:09,304 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:09,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-07-13 19:13:09,504 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:09,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:09,505 INFO L82 PathProgramCache]: Analyzing trace with hash 299845136, now seen corresponding path program 69 times [2021-07-13 19:13:09,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:09,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832372353] [2021-07-13 19:13:09,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:09,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:09,583 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:09,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:09,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832372353] [2021-07-13 19:13:09,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832372353] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:09,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893841419] [2021-07-13 19:13:09,583 INFO L93 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 [2021-07-13 19:13:09,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:13:09,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:09,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:13:09,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:09,756 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:09,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893841419] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:09,757 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:09,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 19:13:09,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340444208] [2021-07-13 19:13:09,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:13:09,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:09,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:13:09,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:13:09,757 INFO L87 Difference]: Start difference. First operand 98 states and 196 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) 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) [2021-07-13 19:13:09,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:09,995 INFO L93 Difference]: Finished difference Result 139 states and 270 transitions. [2021-07-13 19:13:09,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:13:09,995 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) 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 17 [2021-07-13 19:13:09,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:09,996 INFO L225 Difference]: With dead ends: 139 [2021-07-13 19:13:09,996 INFO L226 Difference]: Without dead ends: 132 [2021-07-13 19:13:09,996 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 271.8ms TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:13:09,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-07-13 19:13:09,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 96. [2021-07-13 19:13:09,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.9894736842105263) internal successors, (189), 95 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:09,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 189 transitions. [2021-07-13 19:13:09,998 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 189 transitions. Word has length 17 [2021-07-13 19:13:09,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:09,998 INFO L482 AbstractCegarLoop]: Abstraction has 96 states and 189 transitions. [2021-07-13 19:13:09,998 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) 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) [2021-07-13 19:13:09,998 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 189 transitions. [2021-07-13 19:13:09,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:13:09,998 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:09,998 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:10,205 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:10,205 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:10,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:10,205 INFO L82 PathProgramCache]: Analyzing trace with hash -1864412196, now seen corresponding path program 70 times [2021-07-13 19:13:10,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:10,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797412455] [2021-07-13 19:13:10,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:10,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:10,288 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:10,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:10,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797412455] [2021-07-13 19:13:10,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797412455] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:10,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771721827] [2021-07-13 19:13:10,288 INFO L93 rtionOrderModulation]: Changing 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 [2021-07-13 19:13:10,311 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:13:10,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:10,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:13:10,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:10,481 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:10,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771721827] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:10,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:10,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 19:13:10,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366621455] [2021-07-13 19:13:10,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:13:10,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:10,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:13:10,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:13:10,482 INFO L87 Difference]: Start difference. First operand 96 states and 189 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) 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) [2021-07-13 19:13:10,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:10,727 INFO L93 Difference]: Finished difference Result 140 states and 268 transitions. [2021-07-13 19:13:10,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:13:10,728 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) 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 17 [2021-07-13 19:13:10,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:10,728 INFO L225 Difference]: With dead ends: 140 [2021-07-13 19:13:10,728 INFO L226 Difference]: Without dead ends: 133 [2021-07-13 19:13:10,728 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 301.2ms TimeCoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:13:10,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-07-13 19:13:10,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 98. [2021-07-13 19:13:10,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.020618556701031) internal successors, (196), 97 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:10,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 196 transitions. [2021-07-13 19:13:10,730 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 196 transitions. Word has length 17 [2021-07-13 19:13:10,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:10,730 INFO L482 AbstractCegarLoop]: Abstraction has 98 states and 196 transitions. [2021-07-13 19:13:10,730 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) 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) [2021-07-13 19:13:10,730 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 196 transitions. [2021-07-13 19:13:10,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:13:10,730 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:10,730 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:10,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:10,931 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:10,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:10,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1848951400, now seen corresponding path program 71 times [2021-07-13 19:13:10,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:10,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137190663] [2021-07-13 19:13:10,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:10,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:11,018 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:11,018 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:11,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137190663] [2021-07-13 19:13:11,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137190663] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:11,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682970557] [2021-07-13 19:13:11,019 INFO L93 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 [2021-07-13 19:13:11,040 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:13:11,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:11,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:13:11,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:11,188 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:11,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682970557] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:11,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:11,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 19:13:11,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188108752] [2021-07-13 19:13:11,189 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:13:11,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:11,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:13:11,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:13:11,189 INFO L87 Difference]: Start difference. First operand 98 states and 196 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) 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) [2021-07-13 19:13:11,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:11,439 INFO L93 Difference]: Finished difference Result 151 states and 289 transitions. [2021-07-13 19:13:11,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:13:11,440 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) 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 17 [2021-07-13 19:13:11,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:11,440 INFO L225 Difference]: With dead ends: 151 [2021-07-13 19:13:11,440 INFO L226 Difference]: Without dead ends: 144 [2021-07-13 19:13:11,440 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 277.1ms TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:13:11,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-07-13 19:13:11,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 97. [2021-07-13 19:13:11,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.0) internal successors, (192), 96 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) [2021-07-13 19:13:11,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 192 transitions. [2021-07-13 19:13:11,442 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 192 transitions. Word has length 17 [2021-07-13 19:13:11,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:11,442 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 192 transitions. [2021-07-13 19:13:11,442 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) 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) [2021-07-13 19:13:11,442 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 192 transitions. [2021-07-13 19:13:11,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:13:11,442 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:11,442 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:11,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-07-13 19:13:11,653 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:11,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:11,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1277496594, now seen corresponding path program 72 times [2021-07-13 19:13:11,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:11,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590967552] [2021-07-13 19:13:11,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:11,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:11,743 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:11,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:11,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590967552] [2021-07-13 19:13:11,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590967552] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:11,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987531166] [2021-07-13 19:13:11,744 INFO L93 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 [2021-07-13 19:13:11,771 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:13:11,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:11,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:13:11,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:11,979 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:11,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987531166] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:11,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:11,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 19:13:11,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126478200] [2021-07-13 19:13:11,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:13:11,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:11,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:13:11,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:13:11,980 INFO L87 Difference]: Start difference. First operand 97 states and 192 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) 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) [2021-07-13 19:13:12,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:12,261 INFO L93 Difference]: Finished difference Result 124 states and 240 transitions. [2021-07-13 19:13:12,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:13:12,262 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) 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 17 [2021-07-13 19:13:12,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:12,262 INFO L225 Difference]: With dead ends: 124 [2021-07-13 19:13:12,262 INFO L226 Difference]: Without dead ends: 117 [2021-07-13 19:13:12,262 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 336.3ms TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:13:12,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-07-13 19:13:12,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 95. [2021-07-13 19:13:12,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.9893617021276595) internal successors, (187), 94 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) [2021-07-13 19:13:12,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 187 transitions. [2021-07-13 19:13:12,264 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 187 transitions. Word has length 17 [2021-07-13 19:13:12,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:12,264 INFO L482 AbstractCegarLoop]: Abstraction has 95 states and 187 transitions. [2021-07-13 19:13:12,264 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) 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) [2021-07-13 19:13:12,264 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 187 transitions. [2021-07-13 19:13:12,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:13:12,264 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:12,265 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:12,469 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-07-13 19:13:12,469 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:12,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:12,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1336463512, now seen corresponding path program 73 times [2021-07-13 19:13:12,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:12,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148800322] [2021-07-13 19:13:12,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:12,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:12,578 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:12,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:12,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148800322] [2021-07-13 19:13:12,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148800322] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:12,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032312878] [2021-07-13 19:13:12,578 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:13:12,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:12,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:13:12,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:12,762 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:12,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032312878] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:12,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:12,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 19:13:12,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899533129] [2021-07-13 19:13:12,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:13:12,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:12,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:13:12,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:13:12,763 INFO L87 Difference]: Start difference. First operand 95 states and 187 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) 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) [2021-07-13 19:13:13,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:13,068 INFO L93 Difference]: Finished difference Result 157 states and 300 transitions. [2021-07-13 19:13:13,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:13:13,069 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) 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 17 [2021-07-13 19:13:13,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:13,069 INFO L225 Difference]: With dead ends: 157 [2021-07-13 19:13:13,069 INFO L226 Difference]: Without dead ends: 150 [2021-07-13 19:13:13,069 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 350.6ms TimeCoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:13:13,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-07-13 19:13:13,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 97. [2021-07-13 19:13:13,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.0208333333333335) internal successors, (194), 96 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) [2021-07-13 19:13:13,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 194 transitions. [2021-07-13 19:13:13,071 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 194 transitions. Word has length 17 [2021-07-13 19:13:13,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:13,071 INFO L482 AbstractCegarLoop]: Abstraction has 97 states and 194 transitions. [2021-07-13 19:13:13,071 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) 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) [2021-07-13 19:13:13,071 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 194 transitions. [2021-07-13 19:13:13,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:13:13,071 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:13,071 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:13,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:13,272 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:13,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:13,272 INFO L82 PathProgramCache]: Analyzing trace with hash 1351924308, now seen corresponding path program 74 times [2021-07-13 19:13:13,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:13,272 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113081746] [2021-07-13 19:13:13,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:13,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:13,358 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:13,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:13,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113081746] [2021-07-13 19:13:13,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113081746] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:13,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929217825] [2021-07-13 19:13:13,359 INFO L93 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 [2021-07-13 19:13:13,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:13:13,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:13,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:13:13,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:13,539 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:13,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929217825] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:13,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:13,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 19:13:13,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362405968] [2021-07-13 19:13:13,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:13:13,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:13,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:13:13,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:13:13,540 INFO L87 Difference]: Start difference. First operand 97 states and 194 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) 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) [2021-07-13 19:13:13,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:13,925 INFO L93 Difference]: Finished difference Result 169 states and 323 transitions. [2021-07-13 19:13:13,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:13:13,926 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) 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 17 [2021-07-13 19:13:13,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:13,926 INFO L225 Difference]: With dead ends: 169 [2021-07-13 19:13:13,926 INFO L226 Difference]: Without dead ends: 162 [2021-07-13 19:13:13,927 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 341.4ms TimeCoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:13:13,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-07-13 19:13:13,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 96. [2021-07-13 19:13:13,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.0) internal successors, (190), 95 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) [2021-07-13 19:13:13,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 190 transitions. [2021-07-13 19:13:13,929 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 190 transitions. Word has length 17 [2021-07-13 19:13:13,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:13,929 INFO L482 AbstractCegarLoop]: Abstraction has 96 states and 190 transitions. [2021-07-13 19:13:13,929 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) 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) [2021-07-13 19:13:13,929 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 190 transitions. [2021-07-13 19:13:13,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:13:13,929 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:13,929 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:14,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:14,145 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:14,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:14,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1923379114, now seen corresponding path program 75 times [2021-07-13 19:13:14,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:14,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097115615] [2021-07-13 19:13:14,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:14,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:14,218 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:14,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:14,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097115615] [2021-07-13 19:13:14,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097115615] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:14,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414470417] [2021-07-13 19:13:14,219 INFO L93 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 [2021-07-13 19:13:14,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:13:14,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:14,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:13:14,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:14,399 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:14,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414470417] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:14,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:14,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 19:13:14,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290479277] [2021-07-13 19:13:14,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:13:14,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:14,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:13:14,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:13:14,400 INFO L87 Difference]: Start difference. First operand 96 states and 190 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) 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) [2021-07-13 19:13:14,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:14,730 INFO L93 Difference]: Finished difference Result 141 states and 270 transitions. [2021-07-13 19:13:14,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:13:14,730 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) 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 17 [2021-07-13 19:13:14,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:14,731 INFO L225 Difference]: With dead ends: 141 [2021-07-13 19:13:14,731 INFO L226 Difference]: Without dead ends: 134 [2021-07-13 19:13:14,731 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 340.2ms TimeCoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:13:14,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-07-13 19:13:14,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 95. [2021-07-13 19:13:14,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.9893617021276595) internal successors, (187), 94 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) [2021-07-13 19:13:14,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 187 transitions. [2021-07-13 19:13:14,732 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 187 transitions. Word has length 17 [2021-07-13 19:13:14,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:14,732 INFO L482 AbstractCegarLoop]: Abstraction has 95 states and 187 transitions. [2021-07-13 19:13:14,733 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) 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) [2021-07-13 19:13:14,733 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 187 transitions. [2021-07-13 19:13:14,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:13:14,733 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:14,733 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:14,933 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:14,933 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:14,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:14,934 INFO L82 PathProgramCache]: Analyzing trace with hash 762400792, now seen corresponding path program 4 times [2021-07-13 19:13:14,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:14,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707811668] [2021-07-13 19:13:14,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:14,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:15,011 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:15,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:15,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707811668] [2021-07-13 19:13:15,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707811668] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:15,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251554969] [2021-07-13 19:13:15,011 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 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 [2021-07-13 19:13:15,032 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:13:15,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:15,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:13:15,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:15,104 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:15,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251554969] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:15,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:15,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-07-13 19:13:15,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261075714] [2021-07-13 19:13:15,105 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:13:15,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:15,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:13:15,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:13:15,105 INFO L87 Difference]: Start difference. First operand 95 states and 187 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:15,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:15,265 INFO L93 Difference]: Finished difference Result 130 states and 253 transitions. [2021-07-13 19:13:15,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:13:15,265 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have 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 [2021-07-13 19:13:15,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:15,266 INFO L225 Difference]: With dead ends: 130 [2021-07-13 19:13:15,266 INFO L226 Difference]: Without dead ends: 119 [2021-07-13 19:13:15,266 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 210.0ms TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:13:15,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-07-13 19:13:15,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 99. [2021-07-13 19:13:15,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.010204081632653) internal successors, (197), 98 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) [2021-07-13 19:13:15,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 197 transitions. [2021-07-13 19:13:15,268 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 197 transitions. Word has length 17 [2021-07-13 19:13:15,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:15,268 INFO L482 AbstractCegarLoop]: Abstraction has 99 states and 197 transitions. [2021-07-13 19:13:15,268 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:15,268 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 197 transitions. [2021-07-13 19:13:15,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-13 19:13:15,268 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:15,268 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:15,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:15,481 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:15,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:15,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1385523536, now seen corresponding path program 76 times [2021-07-13 19:13:15,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:15,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455710080] [2021-07-13 19:13:15,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:15,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:15,556 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:15,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:15,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455710080] [2021-07-13 19:13:15,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455710080] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:15,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802433807] [2021-07-13 19:13:15,556 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2021-07-13 19:13:15,578 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:13:15,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:15,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-13 19:13:15,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:15,753 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:15,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802433807] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:15,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:15,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-13 19:13:15,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211815242] [2021-07-13 19:13:15,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-13 19:13:15,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:15,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-13 19:13:15,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:13:15,754 INFO L87 Difference]: Start difference. First operand 99 states and 197 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) 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) [2021-07-13 19:13:16,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:16,145 INFO L93 Difference]: Finished difference Result 153 states and 289 transitions. [2021-07-13 19:13:16,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:13:16,145 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) 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 17 [2021-07-13 19:13:16,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:16,146 INFO L225 Difference]: With dead ends: 153 [2021-07-13 19:13:16,146 INFO L226 Difference]: Without dead ends: 139 [2021-07-13 19:13:16,146 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 410.9ms TimeCoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:13:16,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-07-13 19:13:16,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 100. [2021-07-13 19:13:16,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.9898989898989898) internal successors, (197), 99 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) [2021-07-13 19:13:16,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 197 transitions. [2021-07-13 19:13:16,148 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 197 transitions. Word has length 17 [2021-07-13 19:13:16,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:16,148 INFO L482 AbstractCegarLoop]: Abstraction has 100 states and 197 transitions. [2021-07-13 19:13:16,148 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) 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) [2021-07-13 19:13:16,148 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 197 transitions. [2021-07-13 19:13:16,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:13:16,148 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:16,148 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:16,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:16,369 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:16,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:16,369 INFO L82 PathProgramCache]: Analyzing trace with hash 255431194, now seen corresponding path program 4 times [2021-07-13 19:13:16,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:16,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134558416] [2021-07-13 19:13:16,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:16,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:16,465 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:16,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:16,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134558416] [2021-07-13 19:13:16,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134558416] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:16,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501170282] [2021-07-13 19:13:16,465 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:16,493 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:13:16,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:16,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:13:16,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:16,590 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:16,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501170282] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:16,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:16,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-13 19:13:16,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421732499] [2021-07-13 19:13:16,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:13:16,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:16,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:13:16,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:13:16,591 INFO L87 Difference]: Start difference. First operand 100 states and 197 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 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) [2021-07-13 19:13:16,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:16,801 INFO L93 Difference]: Finished difference Result 132 states and 257 transitions. [2021-07-13 19:13:16,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:13:16,802 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:13:16,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:16,802 INFO L225 Difference]: With dead ends: 132 [2021-07-13 19:13:16,802 INFO L226 Difference]: Without dead ends: 119 [2021-07-13 19:13:16,802 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 272.7ms TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:13:16,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-07-13 19:13:16,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 102. [2021-07-13 19:13:16,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.0) internal successors, (202), 101 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) [2021-07-13 19:13:16,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 202 transitions. [2021-07-13 19:13:16,804 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 202 transitions. Word has length 19 [2021-07-13 19:13:16,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:16,804 INFO L482 AbstractCegarLoop]: Abstraction has 102 states and 202 transitions. [2021-07-13 19:13:16,804 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 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) [2021-07-13 19:13:16,804 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 202 transitions. [2021-07-13 19:13:16,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:13:16,805 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:16,805 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:17,009 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-07-13 19:13:17,009 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:17,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:17,009 INFO L82 PathProgramCache]: Analyzing trace with hash -2015204966, now seen corresponding path program 77 times [2021-07-13 19:13:17,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:17,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759367568] [2021-07-13 19:13:17,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:17,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:17,132 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:17,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:17,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759367568] [2021-07-13 19:13:17,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759367568] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:17,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425570598] [2021-07-13 19:13:17,133 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:13:17,155 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:13:17,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:17,156 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 19:13:17,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:17,327 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:17,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425570598] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:17,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:17,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:13:17,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760184993] [2021-07-13 19:13:17,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:13:17,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:17,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:13:17,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:13:17,328 INFO L87 Difference]: Start difference. First operand 102 states and 202 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:13:17,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:17,646 INFO L93 Difference]: Finished difference Result 136 states and 260 transitions. [2021-07-13 19:13:17,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:13:17,646 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:13:17,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:17,646 INFO L225 Difference]: With dead ends: 136 [2021-07-13 19:13:17,647 INFO L226 Difference]: Without dead ends: 129 [2021-07-13 19:13:17,647 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 400.9ms TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:13:17,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-07-13 19:13:17,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 102. [2021-07-13 19:13:17,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.0) internal successors, (202), 101 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) [2021-07-13 19:13:17,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 202 transitions. [2021-07-13 19:13:17,649 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 202 transitions. Word has length 19 [2021-07-13 19:13:17,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:17,649 INFO L482 AbstractCegarLoop]: Abstraction has 102 states and 202 transitions. [2021-07-13 19:13:17,649 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:13:17,649 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 202 transitions. [2021-07-13 19:13:17,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:13:17,649 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:17,649 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:17,850 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:17,850 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:17,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:17,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1897041942, now seen corresponding path program 78 times [2021-07-13 19:13:17,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:17,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364188745] [2021-07-13 19:13:17,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:17,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:17,950 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:17,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:17,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364188745] [2021-07-13 19:13:17,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364188745] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:17,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542596673] [2021-07-13 19:13:17,950 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:17,971 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:13:17,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:17,972 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 19:13:17,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:18,148 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:18,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542596673] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:18,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:18,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:13:18,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454888993] [2021-07-13 19:13:18,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:13:18,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:18,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:13:18,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:13:18,149 INFO L87 Difference]: Start difference. First operand 102 states and 202 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:13:18,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:18,507 INFO L93 Difference]: Finished difference Result 141 states and 270 transitions. [2021-07-13 19:13:18,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:13:18,508 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:13:18,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:18,508 INFO L225 Difference]: With dead ends: 141 [2021-07-13 19:13:18,508 INFO L226 Difference]: Without dead ends: 134 [2021-07-13 19:13:18,508 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 366.2ms TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:13:18,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-07-13 19:13:18,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 104. [2021-07-13 19:13:18,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.0097087378640777) internal successors, (207), 103 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) [2021-07-13 19:13:18,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 207 transitions. [2021-07-13 19:13:18,510 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 207 transitions. Word has length 19 [2021-07-13 19:13:18,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:18,510 INFO L482 AbstractCegarLoop]: Abstraction has 104 states and 207 transitions. [2021-07-13 19:13:18,510 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:13:18,510 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 207 transitions. [2021-07-13 19:13:18,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:13:18,511 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:18,511 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:18,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-07-13 19:13:18,745 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:18,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:18,745 INFO L82 PathProgramCache]: Analyzing trace with hash -318631526, now seen corresponding path program 79 times [2021-07-13 19:13:18,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:18,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707214954] [2021-07-13 19:13:18,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:18,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:18,867 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:18,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:18,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707214954] [2021-07-13 19:13:18,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707214954] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:18,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733156922] [2021-07-13 19:13:18,867 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:18,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:18,888 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 19:13:18,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:19,054 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:19,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733156922] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:19,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:19,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:13:19,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395690275] [2021-07-13 19:13:19,054 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:13:19,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:19,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:13:19,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:13:19,055 INFO L87 Difference]: Start difference. First operand 104 states and 207 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:13:19,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:19,402 INFO L93 Difference]: Finished difference Result 167 states and 318 transitions. [2021-07-13 19:13:19,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:13:19,403 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:13:19,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:19,403 INFO L225 Difference]: With dead ends: 167 [2021-07-13 19:13:19,403 INFO L226 Difference]: Without dead ends: 160 [2021-07-13 19:13:19,404 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 404.0ms TimeCoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:13:19,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-07-13 19:13:19,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 105. [2021-07-13 19:13:19,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.0288461538461537) internal successors, (211), 104 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) [2021-07-13 19:13:19,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 211 transitions. [2021-07-13 19:13:19,405 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 211 transitions. Word has length 19 [2021-07-13 19:13:19,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:19,405 INFO L482 AbstractCegarLoop]: Abstraction has 105 states and 211 transitions. [2021-07-13 19:13:19,405 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:13:19,405 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 211 transitions. [2021-07-13 19:13:19,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:13:19,406 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:19,406 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:19,606 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-07-13 19:13:19,606 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:19,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:19,607 INFO L82 PathProgramCache]: Analyzing trace with hash -303170730, now seen corresponding path program 80 times [2021-07-13 19:13:19,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:19,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083576366] [2021-07-13 19:13:19,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:19,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:19,713 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:19,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:19,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083576366] [2021-07-13 19:13:19,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083576366] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:19,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839029128] [2021-07-13 19:13:19,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:19,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:13:19,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:19,735 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 19:13:19,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:19,975 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:19,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839029128] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:19,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:19,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:13:19,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728712650] [2021-07-13 19:13:19,975 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:13:19,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:19,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:13:19,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:13:19,976 INFO L87 Difference]: Start difference. First operand 105 states and 211 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:13:20,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:20,350 INFO L93 Difference]: Finished difference Result 150 states and 292 transitions. [2021-07-13 19:13:20,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:13:20,350 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:13:20,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:20,351 INFO L225 Difference]: With dead ends: 150 [2021-07-13 19:13:20,351 INFO L226 Difference]: Without dead ends: 143 [2021-07-13 19:13:20,351 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 429.1ms TimeCoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:13:20,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-07-13 19:13:20,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 103. [2021-07-13 19:13:20,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.0) internal successors, (204), 102 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) [2021-07-13 19:13:20,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 204 transitions. [2021-07-13 19:13:20,352 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 204 transitions. Word has length 19 [2021-07-13 19:13:20,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:20,353 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 204 transitions. [2021-07-13 19:13:20,353 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:13:20,353 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 204 transitions. [2021-07-13 19:13:20,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:13:20,353 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:20,353 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:20,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:20,554 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:20,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:20,554 INFO L82 PathProgramCache]: Analyzing trace with hash -1454735530, now seen corresponding path program 81 times [2021-07-13 19:13:20,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:20,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128588465] [2021-07-13 19:13:20,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:20,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:20,655 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:20,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:20,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128588465] [2021-07-13 19:13:20,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128588465] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:20,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233646162] [2021-07-13 19:13:20,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:13:20,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:13:20,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:20,677 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 19:13:20,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:20,858 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:20,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233646162] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:20,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:20,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:13:20,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55742415] [2021-07-13 19:13:20,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:13:20,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:20,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:13:20,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:13:20,859 INFO L87 Difference]: Start difference. First operand 103 states and 204 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:13:21,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:21,181 INFO L93 Difference]: Finished difference Result 158 states and 304 transitions. [2021-07-13 19:13:21,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:13:21,182 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:13:21,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:21,182 INFO L225 Difference]: With dead ends: 158 [2021-07-13 19:13:21,182 INFO L226 Difference]: Without dead ends: 151 [2021-07-13 19:13:21,182 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 359.2ms TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:13:21,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-07-13 19:13:21,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 105. [2021-07-13 19:13:21,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.0288461538461537) internal successors, (211), 104 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) [2021-07-13 19:13:21,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 211 transitions. [2021-07-13 19:13:21,185 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 211 transitions. Word has length 19 [2021-07-13 19:13:21,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:21,185 INFO L482 AbstractCegarLoop]: Abstraction has 105 states and 211 transitions. [2021-07-13 19:13:21,185 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:13:21,185 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 211 transitions. [2021-07-13 19:13:21,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:13:21,185 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:21,185 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:21,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:21,401 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:21,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:21,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1439274734, now seen corresponding path program 82 times [2021-07-13 19:13:21,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:21,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705681489] [2021-07-13 19:13:21,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:21,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:21,492 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:21,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:21,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705681489] [2021-07-13 19:13:21,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705681489] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:21,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307751827] [2021-07-13 19:13:21,493 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:21,513 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:13:21,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:21,514 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 19:13:21,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:21,707 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:21,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307751827] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:21,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:21,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:13:21,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64246207] [2021-07-13 19:13:21,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:13:21,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:21,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:13:21,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:13:21,708 INFO L87 Difference]: Start difference. First operand 105 states and 211 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:13:22,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:22,027 INFO L93 Difference]: Finished difference Result 160 states and 307 transitions. [2021-07-13 19:13:22,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:13:22,028 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:13:22,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:22,028 INFO L225 Difference]: With dead ends: 160 [2021-07-13 19:13:22,028 INFO L226 Difference]: Without dead ends: 153 [2021-07-13 19:13:22,029 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 364.8ms TimeCoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:13:22,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-07-13 19:13:22,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 104. [2021-07-13 19:13:22,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.0097087378640777) internal successors, (207), 103 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) [2021-07-13 19:13:22,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 207 transitions. [2021-07-13 19:13:22,030 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 207 transitions. Word has length 19 [2021-07-13 19:13:22,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:22,030 INFO L482 AbstractCegarLoop]: Abstraction has 104 states and 207 transitions. [2021-07-13 19:13:22,030 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:13:22,030 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 207 transitions. [2021-07-13 19:13:22,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:13:22,031 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:22,031 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:22,231 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:22,231 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:22,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:22,232 INFO L82 PathProgramCache]: Analyzing trace with hash -867819928, now seen corresponding path program 83 times [2021-07-13 19:13:22,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:22,232 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672434518] [2021-07-13 19:13:22,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:22,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:22,321 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:22,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:22,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672434518] [2021-07-13 19:13:22,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672434518] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:22,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662874553] [2021-07-13 19:13:22,321 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:13:22,342 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:13:22,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:22,343 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 19:13:22,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:22,527 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:22,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662874553] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:22,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:22,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:13:22,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394213996] [2021-07-13 19:13:22,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:13:22,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:22,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:13:22,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:13:22,528 INFO L87 Difference]: Start difference. First operand 104 states and 207 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:13:22,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:22,695 INFO L93 Difference]: Finished difference Result 127 states and 246 transitions. [2021-07-13 19:13:22,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:13:22,695 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:13:22,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:22,696 INFO L225 Difference]: With dead ends: 127 [2021-07-13 19:13:22,696 INFO L226 Difference]: Without dead ends: 120 [2021-07-13 19:13:22,696 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 264.5ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:13:22,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-07-13 19:13:22,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 104. [2021-07-13 19:13:22,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.0097087378640777) internal successors, (207), 103 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) [2021-07-13 19:13:22,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 207 transitions. [2021-07-13 19:13:22,698 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 207 transitions. Word has length 19 [2021-07-13 19:13:22,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:22,698 INFO L482 AbstractCegarLoop]: Abstraction has 104 states and 207 transitions. [2021-07-13 19:13:22,698 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:13:22,698 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 207 transitions. [2021-07-13 19:13:22,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:13:22,698 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:22,698 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:22,898 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,92 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:22,899 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:22,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:22,899 INFO L82 PathProgramCache]: Analyzing trace with hash 2041798938, now seen corresponding path program 84 times [2021-07-13 19:13:22,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:22,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465405373] [2021-07-13 19:13:22,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:22,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:22,990 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:22,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:22,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465405373] [2021-07-13 19:13:22,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465405373] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:22,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843661753] [2021-07-13 19:13:22,990 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:23,011 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:13:23,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:23,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:13:23,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:23,263 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:23,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843661753] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:23,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:23,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:13:23,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451514139] [2021-07-13 19:13:23,263 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:13:23,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:23,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:13:23,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:13:23,264 INFO L87 Difference]: Start difference. First operand 104 states and 207 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:13:23,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:23,424 INFO L93 Difference]: Finished difference Result 125 states and 240 transitions. [2021-07-13 19:13:23,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:13:23,424 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:13:23,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:23,424 INFO L225 Difference]: With dead ends: 125 [2021-07-13 19:13:23,424 INFO L226 Difference]: Without dead ends: 118 [2021-07-13 19:13:23,425 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 298.7ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:13:23,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-07-13 19:13:23,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 103. [2021-07-13 19:13:23,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.0098039215686274) internal successors, (205), 102 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) [2021-07-13 19:13:23,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 205 transitions. [2021-07-13 19:13:23,426 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 205 transitions. Word has length 19 [2021-07-13 19:13:23,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:23,427 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 205 transitions. [2021-07-13 19:13:23,427 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:13:23,427 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 205 transitions. [2021-07-13 19:13:23,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:13:23,427 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:23,427 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:23,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:23,628 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:23,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:23,628 INFO L82 PathProgramCache]: Analyzing trace with hash -499434542, now seen corresponding path program 85 times [2021-07-13 19:13:23,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:23,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036688527] [2021-07-13 19:13:23,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:23,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:23,721 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:23,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:23,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036688527] [2021-07-13 19:13:23,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036688527] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:23,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493927121] [2021-07-13 19:13:23,722 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:13:23,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:23,743 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 19:13:23,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:23,918 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:23,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493927121] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:23,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:23,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:13:23,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121539160] [2021-07-13 19:13:23,918 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:13:23,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:23,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:13:23,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:13:23,919 INFO L87 Difference]: Start difference. First operand 103 states and 205 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:13:24,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:24,304 INFO L93 Difference]: Finished difference Result 137 states and 265 transitions. [2021-07-13 19:13:24,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:13:24,304 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:13:24,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:24,305 INFO L225 Difference]: With dead ends: 137 [2021-07-13 19:13:24,305 INFO L226 Difference]: Without dead ends: 130 [2021-07-13 19:13:24,305 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 418.4ms TimeCoverageRelationStatistics Valid=129, Invalid=627, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:13:24,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-07-13 19:13:24,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 107. [2021-07-13 19:13:24,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0283018867924527) internal successors, (215), 106 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) [2021-07-13 19:13:24,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 215 transitions. [2021-07-13 19:13:24,307 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 215 transitions. Word has length 19 [2021-07-13 19:13:24,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:24,307 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 215 transitions. [2021-07-13 19:13:24,307 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:13:24,307 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 215 transitions. [2021-07-13 19:13:24,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:13:24,307 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:24,307 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:24,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:24,508 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:24,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:24,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1579859286, now seen corresponding path program 86 times [2021-07-13 19:13:24,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:24,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881535804] [2021-07-13 19:13:24,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:24,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:24,612 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:24,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:24,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881535804] [2021-07-13 19:13:24,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881535804] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:24,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638919647] [2021-07-13 19:13:24,612 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:24,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:13:24,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:24,634 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 19:13:24,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:24,824 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:24,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638919647] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:24,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:24,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:13:24,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58000507] [2021-07-13 19:13:24,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:13:24,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:24,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:13:24,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:13:24,825 INFO L87 Difference]: Start difference. First operand 107 states and 215 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:13:25,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:25,278 INFO L93 Difference]: Finished difference Result 192 states and 369 transitions. [2021-07-13 19:13:25,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:13:25,279 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:13:25,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:25,279 INFO L225 Difference]: With dead ends: 192 [2021-07-13 19:13:25,279 INFO L226 Difference]: Without dead ends: 185 [2021-07-13 19:13:25,280 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 450.4ms TimeCoverageRelationStatistics Valid=134, Invalid=568, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:13:25,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-07-13 19:13:25,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 108. [2021-07-13 19:13:25,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.046728971962617) internal successors, (219), 107 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:25,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 219 transitions. [2021-07-13 19:13:25,282 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 219 transitions. Word has length 19 [2021-07-13 19:13:25,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:25,282 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 219 transitions. [2021-07-13 19:13:25,282 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:13:25,282 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 219 transitions. [2021-07-13 19:13:25,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:13:25,282 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:25,282 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:25,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:25,501 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:25,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:25,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1595320082, now seen corresponding path program 87 times [2021-07-13 19:13:25,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:25,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480133971] [2021-07-13 19:13:25,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:25,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:25,597 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:25,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:25,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480133971] [2021-07-13 19:13:25,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480133971] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:25,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490336572] [2021-07-13 19:13:25,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:25,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:13:25,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:25,620 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 19:13:25,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:25,819 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:25,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490336572] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:25,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:25,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:13:25,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769812656] [2021-07-13 19:13:25,819 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:13:25,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:25,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:13:25,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:13:25,820 INFO L87 Difference]: Start difference. First operand 108 states and 219 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:13:26,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:26,299 INFO L93 Difference]: Finished difference Result 176 states and 346 transitions. [2021-07-13 19:13:26,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:13:26,300 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:13:26,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:26,300 INFO L225 Difference]: With dead ends: 176 [2021-07-13 19:13:26,300 INFO L226 Difference]: Without dead ends: 169 [2021-07-13 19:13:26,300 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 446.5ms TimeCoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:13:26,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-07-13 19:13:26,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 106. [2021-07-13 19:13:26,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.019047619047619) internal successors, (212), 105 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:26,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 212 transitions. [2021-07-13 19:13:26,302 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 212 transitions. Word has length 19 [2021-07-13 19:13:26,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:26,302 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 212 transitions. [2021-07-13 19:13:26,302 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:13:26,302 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 212 transitions. [2021-07-13 19:13:26,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:13:26,303 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:26,303 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:26,503 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:26,503 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:26,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:26,504 INFO L82 PathProgramCache]: Analyzing trace with hash -568937250, now seen corresponding path program 88 times [2021-07-13 19:13:26,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:26,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929684860] [2021-07-13 19:13:26,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:26,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:26,604 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:26,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:26,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929684860] [2021-07-13 19:13:26,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929684860] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:26,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895352761] [2021-07-13 19:13:26,604 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:26,625 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:13:26,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:26,626 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 19:13:26,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:26,795 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:26,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895352761] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:26,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:26,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:13:26,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112232885] [2021-07-13 19:13:26,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:13:26,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:26,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:13:26,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:13:26,796 INFO L87 Difference]: Start difference. First operand 106 states and 212 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:13:27,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:27,250 INFO L93 Difference]: Finished difference Result 198 states and 383 transitions. [2021-07-13 19:13:27,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:13:27,250 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:13:27,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:27,251 INFO L225 Difference]: With dead ends: 198 [2021-07-13 19:13:27,251 INFO L226 Difference]: Without dead ends: 191 [2021-07-13 19:13:27,251 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 429.4ms TimeCoverageRelationStatistics Valid=143, Invalid=613, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:13:27,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-07-13 19:13:27,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 108. [2021-07-13 19:13:27,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.046728971962617) internal successors, (219), 107 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:27,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 219 transitions. [2021-07-13 19:13:27,253 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 219 transitions. Word has length 19 [2021-07-13 19:13:27,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:27,253 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 219 transitions. [2021-07-13 19:13:27,253 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:13:27,253 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 219 transitions. [2021-07-13 19:13:27,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:13:27,253 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:27,253 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:27,461 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-07-13 19:13:27,461 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:27,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:27,461 INFO L82 PathProgramCache]: Analyzing trace with hash -553476454, now seen corresponding path program 89 times [2021-07-13 19:13:27,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:27,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29811658] [2021-07-13 19:13:27,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:27,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:27,559 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:27,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:27,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29811658] [2021-07-13 19:13:27,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29811658] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:27,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697519667] [2021-07-13 19:13:27,560 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:27,588 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:13:27,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:27,589 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 19:13:27,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:27,776 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:27,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697519667] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:27,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:27,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:13:27,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887808850] [2021-07-13 19:13:27,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:13:27,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:27,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:13:27,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:13:27,777 INFO L87 Difference]: Start difference. First operand 108 states and 219 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:13:28,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:28,268 INFO L93 Difference]: Finished difference Result 209 states and 402 transitions. [2021-07-13 19:13:28,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:13:28,268 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:13:28,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:28,269 INFO L225 Difference]: With dead ends: 209 [2021-07-13 19:13:28,269 INFO L226 Difference]: Without dead ends: 202 [2021-07-13 19:13:28,269 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 503.6ms TimeCoverageRelationStatistics Valid=152, Invalid=718, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:13:28,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-07-13 19:13:28,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 107. [2021-07-13 19:13:28,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0283018867924527) internal successors, (215), 106 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) [2021-07-13 19:13:28,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 215 transitions. [2021-07-13 19:13:28,271 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 215 transitions. Word has length 19 [2021-07-13 19:13:28,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:28,271 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 215 transitions. [2021-07-13 19:13:28,271 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:13:28,272 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 215 transitions. [2021-07-13 19:13:28,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:13:28,272 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:28,272 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:28,495 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:28,496 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:28,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:28,496 INFO L82 PathProgramCache]: Analyzing trace with hash 17978352, now seen corresponding path program 90 times [2021-07-13 19:13:28,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:28,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121009970] [2021-07-13 19:13:28,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:28,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:28,598 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:28,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:28,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121009970] [2021-07-13 19:13:28,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121009970] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:28,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047125382] [2021-07-13 19:13:28,599 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:28,632 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:13:28,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:28,633 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 19:13:28,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:28,874 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:28,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047125382] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:28,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:28,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:13:28,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077641482] [2021-07-13 19:13:28,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:13:28,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:28,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:13:28,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:13:28,875 INFO L87 Difference]: Start difference. First operand 107 states and 215 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:13:29,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:29,398 INFO L93 Difference]: Finished difference Result 156 states and 301 transitions. [2021-07-13 19:13:29,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:13:29,399 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:13:29,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:29,399 INFO L225 Difference]: With dead ends: 156 [2021-07-13 19:13:29,399 INFO L226 Difference]: Without dead ends: 149 [2021-07-13 19:13:29,400 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 520.6ms TimeCoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:13:29,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-07-13 19:13:29,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 105. [2021-07-13 19:13:29,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.019230769230769) internal successors, (210), 104 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) [2021-07-13 19:13:29,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 210 transitions. [2021-07-13 19:13:29,402 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 210 transitions. Word has length 19 [2021-07-13 19:13:29,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:29,402 INFO L482 AbstractCegarLoop]: Abstraction has 105 states and 210 transitions. [2021-07-13 19:13:29,402 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:13:29,402 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 210 transitions. [2021-07-13 19:13:29,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:13:29,402 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:29,402 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:29,626 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:29,627 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:29,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:29,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1663028838, now seen corresponding path program 91 times [2021-07-13 19:13:29,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:29,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095841462] [2021-07-13 19:13:29,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:29,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:29,722 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:29,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:29,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095841462] [2021-07-13 19:13:29,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095841462] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:29,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440469978] [2021-07-13 19:13:29,723 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 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 [2021-07-13 19:13:29,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:29,744 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 19:13:29,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:29,923 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:29,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440469978] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:29,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:29,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:13:29,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075598906] [2021-07-13 19:13:29,924 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:13:29,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:29,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:13:29,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:13:29,924 INFO L87 Difference]: Start difference. First operand 105 states and 210 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:13:30,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:30,485 INFO L93 Difference]: Finished difference Result 231 states and 445 transitions. [2021-07-13 19:13:30,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:13:30,485 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:13:30,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:30,486 INFO L225 Difference]: With dead ends: 231 [2021-07-13 19:13:30,486 INFO L226 Difference]: Without dead ends: 224 [2021-07-13 19:13:30,486 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 449.7ms TimeCoverageRelationStatistics Valid=138, Invalid=674, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:13:30,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-07-13 19:13:30,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 108. [2021-07-13 19:13:30,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.0654205607476634) internal successors, (221), 107 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) [2021-07-13 19:13:30,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 221 transitions. [2021-07-13 19:13:30,489 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 221 transitions. Word has length 19 [2021-07-13 19:13:30,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:30,489 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 221 transitions. [2021-07-13 19:13:30,489 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:13:30,489 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 221 transitions. [2021-07-13 19:13:30,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:13:30,490 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:30,490 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:30,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-07-13 19:13:30,697 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:30,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:30,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1647568042, now seen corresponding path program 92 times [2021-07-13 19:13:30,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:30,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120517811] [2021-07-13 19:13:30,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:30,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:30,801 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:30,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:30,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120517811] [2021-07-13 19:13:30,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120517811] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:30,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109097370] [2021-07-13 19:13:30,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:30,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:13:30,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:30,822 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 19:13:30,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:30,994 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:30,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109097370] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:30,994 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:30,994 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:13:30,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773472616] [2021-07-13 19:13:30,994 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:13:30,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:30,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:13:30,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:13:30,995 INFO L87 Difference]: Start difference. First operand 108 states and 221 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:13:31,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:31,588 INFO L93 Difference]: Finished difference Result 245 states and 469 transitions. [2021-07-13 19:13:31,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:13:31,588 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:13:31,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:31,589 INFO L225 Difference]: With dead ends: 245 [2021-07-13 19:13:31,589 INFO L226 Difference]: Without dead ends: 238 [2021-07-13 19:13:31,589 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 487.4ms TimeCoverageRelationStatistics Valid=153, Invalid=777, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:13:31,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-07-13 19:13:31,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 107. [2021-07-13 19:13:31,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.047169811320755) internal successors, (217), 106 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) [2021-07-13 19:13:31,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 217 transitions. [2021-07-13 19:13:31,592 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 217 transitions. Word has length 19 [2021-07-13 19:13:31,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:31,592 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 217 transitions. [2021-07-13 19:13:31,592 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:13:31,592 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 217 transitions. [2021-07-13 19:13:31,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:13:31,592 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:31,592 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:31,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-07-13 19:13:31,797 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:31,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:31,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1076113236, now seen corresponding path program 93 times [2021-07-13 19:13:31,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:31,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372667477] [2021-07-13 19:13:31,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:31,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:31,890 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:31,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:31,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372667477] [2021-07-13 19:13:31,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372667477] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:31,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782655986] [2021-07-13 19:13:31,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:31,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:13:31,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:31,911 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 19:13:31,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:32,120 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:32,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782655986] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:32,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:32,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:13:32,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49097951] [2021-07-13 19:13:32,121 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:13:32,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:32,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:13:32,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:13:32,121 INFO L87 Difference]: Start difference. First operand 107 states and 217 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:13:32,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:32,699 INFO L93 Difference]: Finished difference Result 193 states and 368 transitions. [2021-07-13 19:13:32,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:13:32,700 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:13:32,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:32,700 INFO L225 Difference]: With dead ends: 193 [2021-07-13 19:13:32,700 INFO L226 Difference]: Without dead ends: 186 [2021-07-13 19:13:32,700 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 491.0ms TimeCoverageRelationStatistics Valid=138, Invalid=792, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:13:32,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-07-13 19:13:32,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 106. [2021-07-13 19:13:32,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.038095238095238) internal successors, (214), 105 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) [2021-07-13 19:13:32,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 214 transitions. [2021-07-13 19:13:32,703 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 214 transitions. Word has length 19 [2021-07-13 19:13:32,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:32,703 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 214 transitions. [2021-07-13 19:13:32,703 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:13:32,703 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 214 transitions. [2021-07-13 19:13:32,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:13:32,703 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:32,703 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:32,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-07-13 19:13:32,927 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:32,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:32,927 INFO L82 PathProgramCache]: Analyzing trace with hash 361302298, now seen corresponding path program 94 times [2021-07-13 19:13:32,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:32,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502707738] [2021-07-13 19:13:32,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:32,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:33,014 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:33,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:33,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502707738] [2021-07-13 19:13:33,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502707738] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:33,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775702862] [2021-07-13 19:13:33,015 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:33,036 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:13:33,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:33,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:13:33,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:33,259 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:33,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775702862] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:33,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:33,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:13:33,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699961644] [2021-07-13 19:13:33,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:13:33,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:33,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:13:33,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:13:33,260 INFO L87 Difference]: Start difference. First operand 106 states and 214 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:13:33,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:33,494 INFO L93 Difference]: Finished difference Result 142 states and 271 transitions. [2021-07-13 19:13:33,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:13:33,494 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:13:33,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:33,494 INFO L225 Difference]: With dead ends: 142 [2021-07-13 19:13:33,494 INFO L226 Difference]: Without dead ends: 135 [2021-07-13 19:13:33,495 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 289.0ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:13:33,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-07-13 19:13:33,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 106. [2021-07-13 19:13:33,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.038095238095238) internal successors, (214), 105 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) [2021-07-13 19:13:33,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 214 transitions. [2021-07-13 19:13:33,496 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 214 transitions. Word has length 19 [2021-07-13 19:13:33,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:33,496 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 214 transitions. [2021-07-13 19:13:33,496 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:13:33,496 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 214 transitions. [2021-07-13 19:13:33,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:13:33,497 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:33,497 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:33,697 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-07-13 19:13:33,697 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:33,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:33,698 INFO L82 PathProgramCache]: Analyzing trace with hash -21418090, now seen corresponding path program 95 times [2021-07-13 19:13:33,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:33,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75523860] [2021-07-13 19:13:33,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:33,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:33,808 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:33,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:33,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75523860] [2021-07-13 19:13:33,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75523860] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:33,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198217462] [2021-07-13 19:13:33,808 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 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 [2021-07-13 19:13:33,829 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:13:33,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:33,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:13:33,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:34,047 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:34,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198217462] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:34,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:34,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:13:34,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293687183] [2021-07-13 19:13:34,048 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:13:34,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:34,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:13:34,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:13:34,048 INFO L87 Difference]: Start difference. First operand 106 states and 214 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:13:34,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:34,336 INFO L93 Difference]: Finished difference Result 139 states and 267 transitions. [2021-07-13 19:13:34,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:13:34,336 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:13:34,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:34,336 INFO L225 Difference]: With dead ends: 139 [2021-07-13 19:13:34,336 INFO L226 Difference]: Without dead ends: 132 [2021-07-13 19:13:34,336 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 316.0ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:13:34,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-07-13 19:13:34,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 107. [2021-07-13 19:13:34,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.047169811320755) internal successors, (217), 106 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) [2021-07-13 19:13:34,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 217 transitions. [2021-07-13 19:13:34,338 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 217 transitions. Word has length 19 [2021-07-13 19:13:34,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:34,338 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 217 transitions. [2021-07-13 19:13:34,338 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:13:34,338 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 217 transitions. [2021-07-13 19:13:34,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:13:34,338 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:34,338 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:34,539 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-07-13 19:13:34,539 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:34,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:34,540 INFO L82 PathProgramCache]: Analyzing trace with hash 2057875738, now seen corresponding path program 96 times [2021-07-13 19:13:34,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:34,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565889008] [2021-07-13 19:13:34,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:34,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:34,665 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:34,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:34,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565889008] [2021-07-13 19:13:34,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565889008] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:34,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177347245] [2021-07-13 19:13:34,666 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:34,693 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:13:34,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:34,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:13:34,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:34,961 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:34,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177347245] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:34,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:34,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:13:34,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238551623] [2021-07-13 19:13:34,962 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:13:34,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:34,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:13:34,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:13:34,963 INFO L87 Difference]: Start difference. First operand 107 states and 217 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:13:35,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:35,278 INFO L93 Difference]: Finished difference Result 165 states and 315 transitions. [2021-07-13 19:13:35,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:13:35,279 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:13:35,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:35,279 INFO L225 Difference]: With dead ends: 165 [2021-07-13 19:13:35,280 INFO L226 Difference]: Without dead ends: 158 [2021-07-13 19:13:35,280 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 416.1ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:13:35,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-07-13 19:13:35,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 108. [2021-07-13 19:13:35,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.0654205607476634) internal successors, (221), 107 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) [2021-07-13 19:13:35,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 221 transitions. [2021-07-13 19:13:35,282 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 221 transitions. Word has length 19 [2021-07-13 19:13:35,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:35,282 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 221 transitions. [2021-07-13 19:13:35,282 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:13:35,282 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 221 transitions. [2021-07-13 19:13:35,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:13:35,282 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:35,282 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:35,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-07-13 19:13:35,493 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:35,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:35,493 INFO L82 PathProgramCache]: Analyzing trace with hash 2073336534, now seen corresponding path program 97 times [2021-07-13 19:13:35,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:35,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108601742] [2021-07-13 19:13:35,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:35,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:35,593 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:35,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:35,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108601742] [2021-07-13 19:13:35,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108601742] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:35,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849960653] [2021-07-13 19:13:35,594 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:35,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:35,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:13:35,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:35,825 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:35,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849960653] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:35,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:35,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:13:35,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215361583] [2021-07-13 19:13:35,825 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:13:35,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:35,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:13:35,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:13:35,826 INFO L87 Difference]: Start difference. First operand 108 states and 221 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:13:36,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:36,112 INFO L93 Difference]: Finished difference Result 152 states and 297 transitions. [2021-07-13 19:13:36,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:13:36,112 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:13:36,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:36,113 INFO L225 Difference]: With dead ends: 152 [2021-07-13 19:13:36,113 INFO L226 Difference]: Without dead ends: 145 [2021-07-13 19:13:36,113 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 316.3ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:13:36,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-07-13 19:13:36,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 106. [2021-07-13 19:13:36,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.038095238095238) internal successors, (214), 105 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) [2021-07-13 19:13:36,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 214 transitions. [2021-07-13 19:13:36,115 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 214 transitions. Word has length 19 [2021-07-13 19:13:36,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:36,115 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 214 transitions. [2021-07-13 19:13:36,115 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:13:36,115 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 214 transitions. [2021-07-13 19:13:36,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:13:36,115 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:36,116 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:36,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-07-13 19:13:36,325 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:36,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:36,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1613968814, now seen corresponding path program 98 times [2021-07-13 19:13:36,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:36,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968827226] [2021-07-13 19:13:36,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:36,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:36,412 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:36,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:36,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968827226] [2021-07-13 19:13:36,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968827226] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:36,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448890532] [2021-07-13 19:13:36,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:13:36,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:13:36,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:36,435 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 19:13:36,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:36,622 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:36,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448890532] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:36,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:36,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:13:36,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647150477] [2021-07-13 19:13:36,622 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:13:36,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:36,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:13:36,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:13:36,623 INFO L87 Difference]: Start difference. First operand 106 states and 214 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:13:37,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:37,013 INFO L93 Difference]: Finished difference Result 186 states and 349 transitions. [2021-07-13 19:13:37,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:13:37,013 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:13:37,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:37,014 INFO L225 Difference]: With dead ends: 186 [2021-07-13 19:13:37,014 INFO L226 Difference]: Without dead ends: 172 [2021-07-13 19:13:37,014 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 394.5ms TimeCoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:13:37,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-07-13 19:13:37,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 105. [2021-07-13 19:13:37,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.0288461538461537) internal successors, (211), 104 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) [2021-07-13 19:13:37,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 211 transitions. [2021-07-13 19:13:37,016 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 211 transitions. Word has length 19 [2021-07-13 19:13:37,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:37,016 INFO L482 AbstractCegarLoop]: Abstraction has 105 states and 211 transitions. [2021-07-13 19:13:37,016 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:13:37,016 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 211 transitions. [2021-07-13 19:13:37,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:13:37,016 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:37,016 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:37,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:37,217 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:37,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:37,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1757683798, now seen corresponding path program 99 times [2021-07-13 19:13:37,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:37,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868342798] [2021-07-13 19:13:37,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:37,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:37,315 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:37,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:37,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868342798] [2021-07-13 19:13:37,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868342798] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:37,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734934003] [2021-07-13 19:13:37,315 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:37,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:13:37,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:37,339 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 19:13:37,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:37,512 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:37,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734934003] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:37,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:37,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:13:37,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242310488] [2021-07-13 19:13:37,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:13:37,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:37,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:13:37,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:13:37,513 INFO L87 Difference]: Start difference. First operand 105 states and 211 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:13:38,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:38,464 INFO L93 Difference]: Finished difference Result 286 states and 540 transitions. [2021-07-13 19:13:38,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 19:13:38,464 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:13:38,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:38,465 INFO L225 Difference]: With dead ends: 286 [2021-07-13 19:13:38,465 INFO L226 Difference]: Without dead ends: 279 [2021-07-13 19:13:38,466 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 769.8ms TimeCoverageRelationStatistics Valid=265, Invalid=1541, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 19:13:38,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-07-13 19:13:38,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 109. [2021-07-13 19:13:38,468 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) [2021-07-13 19:13:38,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 225 transitions. [2021-07-13 19:13:38,468 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 225 transitions. Word has length 19 [2021-07-13 19:13:38,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:38,468 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 225 transitions. [2021-07-13 19:13:38,468 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:13:38,469 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 225 transitions. [2021-07-13 19:13:38,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:13:38,469 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:38,469 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:38,687 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-07-13 19:13:38,687 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:38,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:38,688 INFO L82 PathProgramCache]: Analyzing trace with hash 1773144594, now seen corresponding path program 100 times [2021-07-13 19:13:38,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:38,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912032320] [2021-07-13 19:13:38,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:38,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:38,784 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:38,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:38,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912032320] [2021-07-13 19:13:38,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912032320] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:38,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508171199] [2021-07-13 19:13:38,784 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:13:38,807 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:13:38,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:38,808 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 19:13:38,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:39,010 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:39,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508171199] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:39,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:39,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:13:39,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419618404] [2021-07-13 19:13:39,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:13:39,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:39,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:13:39,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:13:39,011 INFO L87 Difference]: Start difference. First operand 109 states and 225 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:13:39,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:39,995 INFO L93 Difference]: Finished difference Result 295 states and 558 transitions. [2021-07-13 19:13:39,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 19:13:39,995 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:13:39,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:39,996 INFO L225 Difference]: With dead ends: 295 [2021-07-13 19:13:39,996 INFO L226 Difference]: Without dead ends: 288 [2021-07-13 19:13:39,996 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 802.3ms TimeCoverageRelationStatistics Valid=314, Invalid=1578, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 19:13:39,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2021-07-13 19:13:39,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 108. [2021-07-13 19:13:39,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.0654205607476634) internal successors, (221), 107 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) [2021-07-13 19:13:39,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 221 transitions. [2021-07-13 19:13:39,999 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 221 transitions. Word has length 19 [2021-07-13 19:13:39,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:39,999 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 221 transitions. [2021-07-13 19:13:39,999 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:13:39,999 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 221 transitions. [2021-07-13 19:13:39,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:13:40,000 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:40,000 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:40,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:40,209 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:40,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:40,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1950367896, now seen corresponding path program 101 times [2021-07-13 19:13:40,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:40,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312106475] [2021-07-13 19:13:40,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:40,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:40,300 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:40,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:40,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312106475] [2021-07-13 19:13:40,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312106475] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:40,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540029086] [2021-07-13 19:13:40,300 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:40,324 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:13:40,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:40,325 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 19:13:40,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:40,518 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:40,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540029086] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:40,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:40,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:13:40,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863237862] [2021-07-13 19:13:40,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:13:40,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:40,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:13:40,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:13:40,519 INFO L87 Difference]: Start difference. First operand 108 states and 221 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:13:41,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:41,373 INFO L93 Difference]: Finished difference Result 223 states and 419 transitions. [2021-07-13 19:13:41,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 19:13:41,373 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:13:41,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:41,374 INFO L225 Difference]: With dead ends: 223 [2021-07-13 19:13:41,374 INFO L226 Difference]: Without dead ends: 216 [2021-07-13 19:13:41,374 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 729.0ms TimeCoverageRelationStatistics Valid=233, Invalid=1249, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 19:13:41,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-07-13 19:13:41,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 108. [2021-07-13 19:13:41,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.0654205607476634) internal successors, (221), 107 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) [2021-07-13 19:13:41,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 221 transitions. [2021-07-13 19:13:41,376 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 221 transitions. Word has length 19 [2021-07-13 19:13:41,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:41,376 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 221 transitions. [2021-07-13 19:13:41,377 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:13:41,377 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 221 transitions. [2021-07-13 19:13:41,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:13:41,377 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:41,377 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:41,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2021-07-13 19:13:41,578 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:41,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:41,578 INFO L82 PathProgramCache]: Analyzing trace with hash -512952362, now seen corresponding path program 102 times [2021-07-13 19:13:41,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:41,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692610847] [2021-07-13 19:13:41,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:41,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:41,677 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:41,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:41,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692610847] [2021-07-13 19:13:41,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692610847] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:41,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228339262] [2021-07-13 19:13:41,677 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:41,703 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:13:41,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:41,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:13:41,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:41,962 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:41,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228339262] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:41,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:41,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:13:41,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91958988] [2021-07-13 19:13:41,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:13:41,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:41,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:13:41,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:13:41,964 INFO L87 Difference]: Start difference. First operand 108 states and 221 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:13:42,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:42,199 INFO L93 Difference]: Finished difference Result 146 states and 288 transitions. [2021-07-13 19:13:42,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:13:42,199 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:13:42,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:42,200 INFO L225 Difference]: With dead ends: 146 [2021-07-13 19:13:42,200 INFO L226 Difference]: Without dead ends: 139 [2021-07-13 19:13:42,200 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 347.2ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:13:42,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-07-13 19:13:42,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 110. [2021-07-13 19:13:42,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.091743119266055) internal successors, (228), 109 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) [2021-07-13 19:13:42,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 228 transitions. [2021-07-13 19:13:42,202 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 228 transitions. Word has length 19 [2021-07-13 19:13:42,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:42,202 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 228 transitions. [2021-07-13 19:13:42,202 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:13:42,202 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 228 transitions. [2021-07-13 19:13:42,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:13:42,203 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:42,203 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:42,403 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:42,403 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:42,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:42,404 INFO L82 PathProgramCache]: Analyzing trace with hash -895672750, now seen corresponding path program 103 times [2021-07-13 19:13:42,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:42,404 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117215272] [2021-07-13 19:13:42,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:42,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:42,505 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:42,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:42,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117215272] [2021-07-13 19:13:42,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117215272] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:42,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025204728] [2021-07-13 19:13:42,506 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:42,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:42,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:13:42,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:42,825 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:42,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025204728] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:42,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:42,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:13:42,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656354669] [2021-07-13 19:13:42,825 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:13:42,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:42,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:13:42,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:13:42,826 INFO L87 Difference]: Start difference. First operand 110 states and 228 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:13:43,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:43,083 INFO L93 Difference]: Finished difference Result 151 states and 298 transitions. [2021-07-13 19:13:43,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:13:43,083 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:13:43,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:43,083 INFO L225 Difference]: With dead ends: 151 [2021-07-13 19:13:43,083 INFO L226 Difference]: Without dead ends: 144 [2021-07-13 19:13:43,084 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 360.9ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:13:43,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-07-13 19:13:43,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 111. [2021-07-13 19:13:43,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.1) internal successors, (231), 110 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:43,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 231 transitions. [2021-07-13 19:13:43,085 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 231 transitions. Word has length 19 [2021-07-13 19:13:43,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:43,085 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 231 transitions. [2021-07-13 19:13:43,085 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:13:43,085 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 231 transitions. [2021-07-13 19:13:43,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:13:43,085 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:43,085 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:43,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-07-13 19:13:43,287 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:43,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:43,287 INFO L82 PathProgramCache]: Analyzing trace with hash 1183621078, now seen corresponding path program 104 times [2021-07-13 19:13:43,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:43,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109228628] [2021-07-13 19:13:43,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:43,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:43,388 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:43,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:43,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109228628] [2021-07-13 19:13:43,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109228628] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:43,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873570710] [2021-07-13 19:13:43,388 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:43,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:13:43,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:43,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:13:43,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:43,649 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:43,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873570710] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:43,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:43,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:13:43,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589186986] [2021-07-13 19:13:43,650 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:13:43,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:43,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:13:43,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:13:43,650 INFO L87 Difference]: Start difference. First operand 111 states and 231 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:13:43,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:43,937 INFO L93 Difference]: Finished difference Result 176 states and 344 transitions. [2021-07-13 19:13:43,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:13:43,937 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:13:43,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:43,938 INFO L225 Difference]: With dead ends: 176 [2021-07-13 19:13:43,938 INFO L226 Difference]: Without dead ends: 169 [2021-07-13 19:13:43,938 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 358.0ms TimeCoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:13:43,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-07-13 19:13:43,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 112. [2021-07-13 19:13:43,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.1171171171171173) internal successors, (235), 111 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) [2021-07-13 19:13:43,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 235 transitions. [2021-07-13 19:13:43,939 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 235 transitions. Word has length 19 [2021-07-13 19:13:43,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:43,939 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 235 transitions. [2021-07-13 19:13:43,940 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:13:43,940 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 235 transitions. [2021-07-13 19:13:43,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:13:43,940 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:43,940 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:44,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-07-13 19:13:44,145 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:44,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:44,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1199081874, now seen corresponding path program 105 times [2021-07-13 19:13:44,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:44,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630169614] [2021-07-13 19:13:44,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:44,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:44,236 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:44,236 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:44,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630169614] [2021-07-13 19:13:44,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630169614] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:44,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932903760] [2021-07-13 19:13:44,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:44,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:13:44,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:44,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:13:44,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:44,461 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:44,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932903760] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:44,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:44,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:13:44,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255318007] [2021-07-13 19:13:44,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:13:44,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:44,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:13:44,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:13:44,462 INFO L87 Difference]: Start difference. First operand 112 states and 235 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:13:44,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:44,793 INFO L93 Difference]: Finished difference Result 163 states and 326 transitions. [2021-07-13 19:13:44,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:13:44,793 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:13:44,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:44,793 INFO L225 Difference]: With dead ends: 163 [2021-07-13 19:13:44,793 INFO L226 Difference]: Without dead ends: 156 [2021-07-13 19:13:44,794 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 360.6ms TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:13:44,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-07-13 19:13:44,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 110. [2021-07-13 19:13:44,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.091743119266055) internal successors, (228), 109 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) [2021-07-13 19:13:44,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 228 transitions. [2021-07-13 19:13:44,795 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 228 transitions. Word has length 19 [2021-07-13 19:13:44,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:44,795 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 228 transitions. [2021-07-13 19:13:44,795 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:13:44,795 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 228 transitions. [2021-07-13 19:13:44,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:13:44,795 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:44,795 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:44,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-07-13 19:13:44,996 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:44,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:44,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1806743822, now seen corresponding path program 106 times [2021-07-13 19:13:44,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:44,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704248019] [2021-07-13 19:13:44,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:44,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:45,082 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:45,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:45,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704248019] [2021-07-13 19:13:45,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704248019] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:45,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63886019] [2021-07-13 19:13:45,083 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:45,103 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:13:45,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:45,103 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 19:13:45,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:45,283 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:45,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63886019] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:45,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:45,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:13:45,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059657496] [2021-07-13 19:13:45,283 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:13:45,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:45,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:13:45,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:13:45,284 INFO L87 Difference]: Start difference. First operand 110 states and 228 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:13:45,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:45,962 INFO L93 Difference]: Finished difference Result 236 states and 440 transitions. [2021-07-13 19:13:45,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 19:13:45,962 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:13:45,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:45,962 INFO L225 Difference]: With dead ends: 236 [2021-07-13 19:13:45,963 INFO L226 Difference]: Without dead ends: 176 [2021-07-13 19:13:45,963 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 689.5ms TimeCoverageRelationStatistics Valid=254, Invalid=1152, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 19:13:45,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-07-13 19:13:45,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 109. [2021-07-13 19:13:45,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.037037037037037) internal successors, (220), 108 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) [2021-07-13 19:13:45,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 220 transitions. [2021-07-13 19:13:45,964 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 220 transitions. Word has length 19 [2021-07-13 19:13:45,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:45,964 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 220 transitions. [2021-07-13 19:13:45,964 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:13:45,964 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 220 transitions. [2021-07-13 19:13:45,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:13:45,965 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:45,965 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:46,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:46,165 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:46,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:46,166 INFO L82 PathProgramCache]: Analyzing trace with hash 117019782, now seen corresponding path program 107 times [2021-07-13 19:13:46,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:46,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220141983] [2021-07-13 19:13:46,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:46,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:46,263 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:46,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:46,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220141983] [2021-07-13 19:13:46,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220141983] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:46,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814424653] [2021-07-13 19:13:46,264 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:46,297 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:13:46,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:46,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:13:46,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:46,513 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:46,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814424653] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:46,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:46,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:13:46,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531217584] [2021-07-13 19:13:46,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:13:46,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:46,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:13:46,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:13:46,515 INFO L87 Difference]: Start difference. First operand 109 states and 220 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:13:46,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:46,762 INFO L93 Difference]: Finished difference Result 126 states and 248 transitions. [2021-07-13 19:13:46,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:13:46,763 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:13:46,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:46,763 INFO L225 Difference]: With dead ends: 126 [2021-07-13 19:13:46,763 INFO L226 Difference]: Without dead ends: 119 [2021-07-13 19:13:46,764 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 322.0ms TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:13:46,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-07-13 19:13:46,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 111. [2021-07-13 19:13:46,765 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) [2021-07-13 19:13:46,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 225 transitions. [2021-07-13 19:13:46,766 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 225 transitions. Word has length 19 [2021-07-13 19:13:46,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:46,766 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 225 transitions. [2021-07-13 19:13:46,766 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:13:46,766 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 225 transitions. [2021-07-13 19:13:46,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:13:46,766 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:46,766 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:46,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-07-13 19:13:46,977 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:46,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:46,977 INFO L82 PathProgramCache]: Analyzing trace with hash -2098653686, now seen corresponding path program 108 times [2021-07-13 19:13:46,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:46,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107376875] [2021-07-13 19:13:46,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:46,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:47,079 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:47,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:47,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107376875] [2021-07-13 19:13:47,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107376875] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:47,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337498209] [2021-07-13 19:13:47,079 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:47,100 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:13:47,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:47,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:13:47,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:47,308 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:47,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337498209] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:47,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:47,308 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:13:47,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696794359] [2021-07-13 19:13:47,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:13:47,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:47,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:13:47,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:13:47,309 INFO L87 Difference]: Start difference. First operand 111 states and 225 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:13:47,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:47,577 INFO L93 Difference]: Finished difference Result 150 states and 291 transitions. [2021-07-13 19:13:47,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:13:47,578 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:13:47,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:47,578 INFO L225 Difference]: With dead ends: 150 [2021-07-13 19:13:47,578 INFO L226 Difference]: Without dead ends: 143 [2021-07-13 19:13:47,578 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 348.0ms TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:13:47,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-07-13 19:13:47,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 112. [2021-07-13 19:13:47,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.063063063063063) internal successors, (229), 111 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) [2021-07-13 19:13:47,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 229 transitions. [2021-07-13 19:13:47,580 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 229 transitions. Word has length 19 [2021-07-13 19:13:47,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:47,580 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 229 transitions. [2021-07-13 19:13:47,580 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:13:47,580 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 229 transitions. [2021-07-13 19:13:47,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:13:47,580 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:47,580 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:47,781 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:47,781 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:47,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:47,781 INFO L82 PathProgramCache]: Analyzing trace with hash -2083192890, now seen corresponding path program 109 times [2021-07-13 19:13:47,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:47,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434419802] [2021-07-13 19:13:47,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:47,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:47,873 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:47,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:47,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434419802] [2021-07-13 19:13:47,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434419802] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:47,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510154163] [2021-07-13 19:13:47,874 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:47,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:47,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:13:47,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:48,106 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:48,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510154163] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:48,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:48,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:13:48,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240759582] [2021-07-13 19:13:48,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:13:48,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:48,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:13:48,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:13:48,107 INFO L87 Difference]: Start difference. First operand 112 states and 229 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:13:48,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:48,408 INFO L93 Difference]: Finished difference Result 137 states and 273 transitions. [2021-07-13 19:13:48,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:13:48,408 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:13:48,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:48,408 INFO L225 Difference]: With dead ends: 137 [2021-07-13 19:13:48,408 INFO L226 Difference]: Without dead ends: 130 [2021-07-13 19:13:48,408 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 349.7ms TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:13:48,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-07-13 19:13:48,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 110. [2021-07-13 19:13:48,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.036697247706422) internal successors, (222), 109 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:48,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 222 transitions. [2021-07-13 19:13:48,410 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 222 transitions. Word has length 19 [2021-07-13 19:13:48,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:48,410 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 222 transitions. [2021-07-13 19:13:48,410 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:13:48,410 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 222 transitions. [2021-07-13 19:13:48,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:13:48,410 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:48,411 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:48,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:48,625 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:48,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:48,625 INFO L82 PathProgramCache]: Analyzing trace with hash 47517074, now seen corresponding path program 110 times [2021-07-13 19:13:48,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:48,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105518377] [2021-07-13 19:13:48,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:48,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:48,716 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:48,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:48,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105518377] [2021-07-13 19:13:48,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105518377] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:48,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350997632] [2021-07-13 19:13:48,717 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:48,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:13:48,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:48,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:13:48,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:48,966 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:48,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350997632] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:48,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:48,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:13:48,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078106640] [2021-07-13 19:13:48,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:13:48,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:48,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:13:48,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:13:48,967 INFO L87 Difference]: Start difference. First operand 110 states and 222 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:13:49,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:49,199 INFO L93 Difference]: Finished difference Result 145 states and 283 transitions. [2021-07-13 19:13:49,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:13:49,199 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:13:49,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:49,200 INFO L225 Difference]: With dead ends: 145 [2021-07-13 19:13:49,200 INFO L226 Difference]: Without dead ends: 138 [2021-07-13 19:13:49,200 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 318.1ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:13:49,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-07-13 19:13:49,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 112. [2021-07-13 19:13:49,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.063063063063063) internal successors, (229), 111 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) [2021-07-13 19:13:49,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 229 transitions. [2021-07-13 19:13:49,201 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 229 transitions. Word has length 19 [2021-07-13 19:13:49,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:49,201 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 229 transitions. [2021-07-13 19:13:49,201 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:13:49,201 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 229 transitions. [2021-07-13 19:13:49,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:13:49,202 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:49,202 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:49,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-07-13 19:13:49,405 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:49,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:49,405 INFO L82 PathProgramCache]: Analyzing trace with hash 62977870, now seen corresponding path program 111 times [2021-07-13 19:13:49,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:49,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059010430] [2021-07-13 19:13:49,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:49,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:49,500 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:49,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:49,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059010430] [2021-07-13 19:13:49,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059010430] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:49,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66695328] [2021-07-13 19:13:49,500 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 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 [2021-07-13 19:13:49,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:13:49,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:49,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:13:49,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:49,723 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:49,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66695328] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:49,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:49,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:13:49,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141969836] [2021-07-13 19:13:49,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:13:49,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:49,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:13:49,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:13:49,724 INFO L87 Difference]: Start difference. First operand 112 states and 229 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:13:49,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:49,914 INFO L93 Difference]: Finished difference Result 151 states and 294 transitions. [2021-07-13 19:13:49,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:13:49,914 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:13:49,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:49,914 INFO L225 Difference]: With dead ends: 151 [2021-07-13 19:13:49,915 INFO L226 Difference]: Without dead ends: 144 [2021-07-13 19:13:49,915 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 300.3ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:13:49,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-07-13 19:13:49,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 111. [2021-07-13 19:13:49,916 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) [2021-07-13 19:13:49,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 225 transitions. [2021-07-13 19:13:49,916 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 225 transitions. Word has length 19 [2021-07-13 19:13:49,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:49,916 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 225 transitions. [2021-07-13 19:13:49,916 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:13:49,916 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 225 transitions. [2021-07-13 19:13:49,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:13:49,916 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:49,917 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:50,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:50,117 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:50,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:50,117 INFO L82 PathProgramCache]: Analyzing trace with hash 634432676, now seen corresponding path program 112 times [2021-07-13 19:13:50,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:50,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999776241] [2021-07-13 19:13:50,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:50,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:50,209 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:50,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:50,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999776241] [2021-07-13 19:13:50,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999776241] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:50,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15518843] [2021-07-13 19:13:50,209 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:50,230 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:13:50,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:50,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:13:50,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:50,455 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:50,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15518843] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:50,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:50,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:13:50,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760981204] [2021-07-13 19:13:50,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:13:50,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:50,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:13:50,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:13:50,456 INFO L87 Difference]: Start difference. First operand 111 states and 225 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:13:50,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:50,655 INFO L93 Difference]: Finished difference Result 128 states and 253 transitions. [2021-07-13 19:13:50,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:13:50,656 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:13:50,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:50,656 INFO L225 Difference]: With dead ends: 128 [2021-07-13 19:13:50,656 INFO L226 Difference]: Without dead ends: 121 [2021-07-13 19:13:50,656 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 276.7ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:13:50,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-07-13 19:13:50,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 111. [2021-07-13 19:13:50,658 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) [2021-07-13 19:13:50,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 225 transitions. [2021-07-13 19:13:50,658 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 225 transitions. Word has length 19 [2021-07-13 19:13:50,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:50,658 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 225 transitions. [2021-07-13 19:13:50,658 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:13:50,658 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 225 transitions. [2021-07-13 19:13:50,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:13:50,659 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:50,659 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:50,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:50,873 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:50,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:50,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1180641562, now seen corresponding path program 113 times [2021-07-13 19:13:50,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:50,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443661304] [2021-07-13 19:13:50,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:50,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:50,958 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:50,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:50,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443661304] [2021-07-13 19:13:50,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443661304] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:50,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494325792] [2021-07-13 19:13:50,958 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:50,979 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:13:50,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:50,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:13:50,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:51,237 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:51,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494325792] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:51,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:51,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:13:51,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845605295] [2021-07-13 19:13:51,238 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:13:51,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:51,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:13:51,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:13:51,238 INFO L87 Difference]: Start difference. First operand 111 states and 225 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:13:51,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:51,454 INFO L93 Difference]: Finished difference Result 138 states and 271 transitions. [2021-07-13 19:13:51,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:13:51,454 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:13:51,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:51,455 INFO L225 Difference]: With dead ends: 138 [2021-07-13 19:13:51,455 INFO L226 Difference]: Without dead ends: 131 [2021-07-13 19:13:51,455 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 328.1ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:13:51,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-07-13 19:13:51,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 111. [2021-07-13 19:13:51,456 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) [2021-07-13 19:13:51,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 225 transitions. [2021-07-13 19:13:51,456 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 225 transitions. Word has length 19 [2021-07-13 19:13:51,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:51,457 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 225 transitions. [2021-07-13 19:13:51,457 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:13:51,457 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 225 transitions. [2021-07-13 19:13:51,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:13:51,457 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:51,457 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:51,657 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:51,658 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:51,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:51,658 INFO L82 PathProgramCache]: Analyzing trace with hash 797921174, now seen corresponding path program 114 times [2021-07-13 19:13:51,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:51,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508284194] [2021-07-13 19:13:51,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:51,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:51,744 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:51,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:51,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508284194] [2021-07-13 19:13:51,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508284194] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:51,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523360076] [2021-07-13 19:13:51,744 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:51,765 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:13:51,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:51,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:13:51,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:51,977 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:51,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523360076] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:51,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:51,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:13:51,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116286976] [2021-07-13 19:13:51,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:13:51,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:51,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:13:51,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:13:51,977 INFO L87 Difference]: Start difference. First operand 111 states and 225 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:13:52,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:52,172 INFO L93 Difference]: Finished difference Result 142 states and 279 transitions. [2021-07-13 19:13:52,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:13:52,172 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:13:52,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:52,173 INFO L225 Difference]: With dead ends: 142 [2021-07-13 19:13:52,173 INFO L226 Difference]: Without dead ends: 135 [2021-07-13 19:13:52,173 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 276.3ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:13:52,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-07-13 19:13:52,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 112. [2021-07-13 19:13:52,174 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) [2021-07-13 19:13:52,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 228 transitions. [2021-07-13 19:13:52,174 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 228 transitions. Word has length 19 [2021-07-13 19:13:52,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:52,174 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 228 transitions. [2021-07-13 19:13:52,175 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:13:52,175 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 228 transitions. [2021-07-13 19:13:52,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:13:52,175 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:52,175 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:52,375 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:52,375 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:52,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:52,376 INFO L82 PathProgramCache]: Analyzing trace with hash -1417752294, now seen corresponding path program 115 times [2021-07-13 19:13:52,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:52,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522305265] [2021-07-13 19:13:52,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:52,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:52,481 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:52,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:52,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522305265] [2021-07-13 19:13:52,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522305265] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:52,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304602024] [2021-07-13 19:13:52,482 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:52,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:52,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:13:52,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:52,773 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:52,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304602024] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:52,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:52,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:13:52,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206690167] [2021-07-13 19:13:52,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:13:52,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:52,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:13:52,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:13:52,774 INFO L87 Difference]: Start difference. First operand 112 states and 228 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:13:53,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:53,072 INFO L93 Difference]: Finished difference Result 164 states and 319 transitions. [2021-07-13 19:13:53,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:13:53,072 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:13:53,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:53,073 INFO L225 Difference]: With dead ends: 164 [2021-07-13 19:13:53,073 INFO L226 Difference]: Without dead ends: 157 [2021-07-13 19:13:53,073 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 386.5ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:13:53,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-07-13 19:13:53,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 113. [2021-07-13 19:13:53,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0714285714285716) internal successors, (232), 112 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:53,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 232 transitions. [2021-07-13 19:13:53,074 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 232 transitions. Word has length 19 [2021-07-13 19:13:53,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:53,074 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 232 transitions. [2021-07-13 19:13:53,074 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:13:53,074 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 232 transitions. [2021-07-13 19:13:53,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:13:53,075 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:53,075 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:53,275 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-07-13 19:13:53,275 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:53,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:53,276 INFO L82 PathProgramCache]: Analyzing trace with hash -1402291498, now seen corresponding path program 116 times [2021-07-13 19:13:53,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:53,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52264369] [2021-07-13 19:13:53,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:53,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:53,376 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:53,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:53,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52264369] [2021-07-13 19:13:53,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52264369] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:53,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759706929] [2021-07-13 19:13:53,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:53,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:13:53,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:53,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:13:53,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:53,604 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:53,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759706929] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:53,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:53,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:13:53,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409052480] [2021-07-13 19:13:53,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:13:53,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:53,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:13:53,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:13:53,605 INFO L87 Difference]: Start difference. First operand 113 states and 232 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:13:53,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:53,941 INFO L93 Difference]: Finished difference Result 151 states and 301 transitions. [2021-07-13 19:13:53,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:13:53,942 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:13:53,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:53,942 INFO L225 Difference]: With dead ends: 151 [2021-07-13 19:13:53,942 INFO L226 Difference]: Without dead ends: 144 [2021-07-13 19:13:53,942 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 324.5ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:13:53,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-07-13 19:13:53,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 110. [2021-07-13 19:13:53,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.036697247706422) internal successors, (222), 109 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:53,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 222 transitions. [2021-07-13 19:13:53,944 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 222 transitions. Word has length 19 [2021-07-13 19:13:53,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:53,944 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 222 transitions. [2021-07-13 19:13:53,944 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:13:53,944 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 222 transitions. [2021-07-13 19:13:53,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:13:53,944 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:53,944 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:54,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-07-13 19:13:54,145 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:54,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:54,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1810613706, now seen corresponding path program 117 times [2021-07-13 19:13:54,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:54,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966525690] [2021-07-13 19:13:54,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:54,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:54,230 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:54,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:54,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966525690] [2021-07-13 19:13:54,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966525690] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:54,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073826068] [2021-07-13 19:13:54,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:54,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:13:54,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:54,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:13:54,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:54,465 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:54,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073826068] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:54,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:54,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:13:54,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498260156] [2021-07-13 19:13:54,465 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:13:54,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:54,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:13:54,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:13:54,466 INFO L87 Difference]: Start difference. First operand 110 states and 222 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:13:54,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:54,673 INFO L93 Difference]: Finished difference Result 130 states and 256 transitions. [2021-07-13 19:13:54,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:13:54,673 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:13:54,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:54,674 INFO L225 Difference]: With dead ends: 130 [2021-07-13 19:13:54,674 INFO L226 Difference]: Without dead ends: 123 [2021-07-13 19:13:54,674 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 274.8ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:13:54,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-07-13 19:13:54,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 112. [2021-07-13 19:13:54,675 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) [2021-07-13 19:13:54,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 227 transitions. [2021-07-13 19:13:54,675 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 227 transitions. Word has length 19 [2021-07-13 19:13:54,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:54,675 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 227 transitions. [2021-07-13 19:13:54,675 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:13:54,675 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 227 transitions. [2021-07-13 19:13:54,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:13:54,676 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:54,676 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:54,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-07-13 19:13:54,877 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:54,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:54,877 INFO L82 PathProgramCache]: Analyzing trace with hash -405059762, now seen corresponding path program 118 times [2021-07-13 19:13:54,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:54,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188239936] [2021-07-13 19:13:54,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:54,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:54,968 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:54,968 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:54,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188239936] [2021-07-13 19:13:54,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188239936] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:54,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349798776] [2021-07-13 19:13:54,968 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:54,989 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:13:54,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:54,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:13:54,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:55,199 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:55,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349798776] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:55,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:55,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:13:55,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834538065] [2021-07-13 19:13:55,200 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:13:55,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:55,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:13:55,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:13:55,201 INFO L87 Difference]: Start difference. First operand 112 states and 227 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:13:55,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:55,437 INFO L93 Difference]: Finished difference Result 153 states and 297 transitions. [2021-07-13 19:13:55,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:13:55,437 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:13:55,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:55,438 INFO L225 Difference]: With dead ends: 153 [2021-07-13 19:13:55,438 INFO L226 Difference]: Without dead ends: 146 [2021-07-13 19:13:55,438 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 295.7ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:13:55,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-07-13 19:13:55,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 113. [2021-07-13 19:13:55,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0625) internal successors, (231), 112 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) [2021-07-13 19:13:55,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 231 transitions. [2021-07-13 19:13:55,439 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 231 transitions. Word has length 19 [2021-07-13 19:13:55,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:55,439 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 231 transitions. [2021-07-13 19:13:55,439 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:13:55,440 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 231 transitions. [2021-07-13 19:13:55,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:13:55,440 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:55,440 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:55,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:55,645 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:55,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:55,645 INFO L82 PathProgramCache]: Analyzing trace with hash -389598966, now seen corresponding path program 119 times [2021-07-13 19:13:55,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:55,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525534272] [2021-07-13 19:13:55,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:55,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:55,744 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:55,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:55,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525534272] [2021-07-13 19:13:55,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525534272] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:55,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798616421] [2021-07-13 19:13:55,744 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 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 [2021-07-13 19:13:55,770 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:13:55,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:55,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:13:55,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:56,003 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:56,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798616421] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:56,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:56,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:13:56,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934707531] [2021-07-13 19:13:56,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:13:56,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:56,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:13:56,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:13:56,008 INFO L87 Difference]: Start difference. First operand 113 states and 231 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:13:56,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:56,229 INFO L93 Difference]: Finished difference Result 140 states and 279 transitions. [2021-07-13 19:13:56,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:13:56,229 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:13:56,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:56,230 INFO L225 Difference]: With dead ends: 140 [2021-07-13 19:13:56,230 INFO L226 Difference]: Without dead ends: 133 [2021-07-13 19:13:56,230 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 302.3ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:13:56,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-07-13 19:13:56,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 111. [2021-07-13 19:13:56,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.036363636363636) internal successors, (224), 110 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:56,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 224 transitions. [2021-07-13 19:13:56,232 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 224 transitions. Word has length 19 [2021-07-13 19:13:56,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:56,232 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 224 transitions. [2021-07-13 19:13:56,232 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:13:56,232 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 224 transitions. [2021-07-13 19:13:56,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:13:56,232 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:56,232 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:56,446 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-07-13 19:13:56,446 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:56,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:56,447 INFO L82 PathProgramCache]: Analyzing trace with hash 1741110998, now seen corresponding path program 120 times [2021-07-13 19:13:56,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:56,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055833879] [2021-07-13 19:13:56,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:56,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:56,539 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:56,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:56,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055833879] [2021-07-13 19:13:56,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055833879] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:56,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820797039] [2021-07-13 19:13:56,540 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:56,566 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:13:56,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:56,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:13:56,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:56,776 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:56,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820797039] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:56,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:56,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:13:56,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215593026] [2021-07-13 19:13:56,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:13:56,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:56,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:13:56,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:13:56,777 INFO L87 Difference]: Start difference. First operand 111 states and 224 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:13:57,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:57,046 INFO L93 Difference]: Finished difference Result 150 states and 293 transitions. [2021-07-13 19:13:57,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:13:57,047 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:13:57,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:57,047 INFO L225 Difference]: With dead ends: 150 [2021-07-13 19:13:57,047 INFO L226 Difference]: Without dead ends: 143 [2021-07-13 19:13:57,048 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 301.1ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:13:57,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-07-13 19:13:57,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 113. [2021-07-13 19:13:57,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0625) internal successors, (231), 112 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) [2021-07-13 19:13:57,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 231 transitions. [2021-07-13 19:13:57,060 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 231 transitions. Word has length 19 [2021-07-13 19:13:57,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:57,061 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 231 transitions. [2021-07-13 19:13:57,061 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:13:57,061 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 231 transitions. [2021-07-13 19:13:57,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:13:57,061 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:57,061 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:57,285 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-07-13 19:13:57,285 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:57,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:57,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1756571794, now seen corresponding path program 121 times [2021-07-13 19:13:57,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:57,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267654176] [2021-07-13 19:13:57,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:57,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:57,395 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:57,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:57,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267654176] [2021-07-13 19:13:57,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267654176] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:57,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186462956] [2021-07-13 19:13:57,396 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:57,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:57,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:13:57,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:57,677 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:57,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186462956] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:57,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:57,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:13:57,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568725802] [2021-07-13 19:13:57,678 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:13:57,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:57,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:13:57,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:13:57,678 INFO L87 Difference]: Start difference. First operand 113 states and 231 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:13:57,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:57,970 INFO L93 Difference]: Finished difference Result 156 states and 304 transitions. [2021-07-13 19:13:57,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:13:57,970 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:13:57,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:57,971 INFO L225 Difference]: With dead ends: 156 [2021-07-13 19:13:57,971 INFO L226 Difference]: Without dead ends: 149 [2021-07-13 19:13:57,971 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 370.7ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:13:57,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-07-13 19:13:57,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 112. [2021-07-13 19:13:57,973 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) [2021-07-13 19:13:57,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 227 transitions. [2021-07-13 19:13:57,973 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 227 transitions. Word has length 19 [2021-07-13 19:13:57,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:57,973 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 227 transitions. [2021-07-13 19:13:57,973 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:13:57,973 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 227 transitions. [2021-07-13 19:13:57,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:13:57,974 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:57,974 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:58,174 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-07-13 19:13:58,174 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:58,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:58,175 INFO L82 PathProgramCache]: Analyzing trace with hash -1966940696, now seen corresponding path program 122 times [2021-07-13 19:13:58,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:58,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196070948] [2021-07-13 19:13:58,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:58,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:58,266 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:58,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:58,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196070948] [2021-07-13 19:13:58,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196070948] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:58,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228782931] [2021-07-13 19:13:58,266 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:58,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:13:58,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:58,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:13:58,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:58,497 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:58,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228782931] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:58,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:58,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:13:58,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399049320] [2021-07-13 19:13:58,497 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:13:58,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:58,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:13:58,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:13:58,498 INFO L87 Difference]: Start difference. First operand 112 states and 227 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:13:58,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:58,692 INFO L93 Difference]: Finished difference Result 133 states and 263 transitions. [2021-07-13 19:13:58,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:13:58,693 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:13:58,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:58,693 INFO L225 Difference]: With dead ends: 133 [2021-07-13 19:13:58,693 INFO L226 Difference]: Without dead ends: 126 [2021-07-13 19:13:58,693 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 274.3ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:13:58,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-07-13 19:13:58,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 109. [2021-07-13 19:13:58,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.037037037037037) internal successors, (220), 108 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) [2021-07-13 19:13:58,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 220 transitions. [2021-07-13 19:13:58,695 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 220 transitions. Word has length 19 [2021-07-13 19:13:58,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:58,695 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 220 transitions. [2021-07-13 19:13:58,695 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:13:58,695 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 220 transitions. [2021-07-13 19:13:58,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:13:58,695 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:58,696 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:58,913 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:58,913 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:58,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:58,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1598555310, now seen corresponding path program 123 times [2021-07-13 19:13:58,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:58,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344467618] [2021-07-13 19:13:58,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:58,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:59,013 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:59,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:59,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344467618] [2021-07-13 19:13:59,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344467618] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:59,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453073067] [2021-07-13 19:13:59,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:59,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:13:59,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:59,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:13:59,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:59,266 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:59,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453073067] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:59,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:59,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:13:59,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448888716] [2021-07-13 19:13:59,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:13:59,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:59,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:13:59,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:13:59,267 INFO L87 Difference]: Start difference. First operand 109 states and 220 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:13:59,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:59,496 INFO L93 Difference]: Finished difference Result 128 states and 252 transitions. [2021-07-13 19:13:59,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:13:59,496 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:13:59,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:59,496 INFO L225 Difference]: With dead ends: 128 [2021-07-13 19:13:59,496 INFO L226 Difference]: Without dead ends: 121 [2021-07-13 19:13:59,496 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 287.6ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:13:59,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-07-13 19:13:59,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 112. [2021-07-13 19:13:59,498 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) [2021-07-13 19:13:59,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 228 transitions. [2021-07-13 19:13:59,498 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 228 transitions. Word has length 19 [2021-07-13 19:13:59,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:59,498 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 228 transitions. [2021-07-13 19:13:59,498 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:13:59,498 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 228 transitions. [2021-07-13 19:13:59,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:13:59,498 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:59,498 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:13:59,698 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:59,699 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:59,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:59,699 INFO L82 PathProgramCache]: Analyzing trace with hash 480738518, now seen corresponding path program 124 times [2021-07-13 19:13:59,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:59,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346470103] [2021-07-13 19:13:59,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:59,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:59,790 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:59,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:59,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346470103] [2021-07-13 19:13:59,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346470103] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:59,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494410266] [2021-07-13 19:13:59,790 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 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 [2021-07-13 19:13:59,810 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:13:59,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:59,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:13:59,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:00,019 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:00,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494410266] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:00,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:00,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:14:00,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284275085] [2021-07-13 19:14:00,020 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:14:00,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:00,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:14:00,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:14:00,020 INFO L87 Difference]: Start difference. First operand 112 states and 228 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:14:00,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:00,269 INFO L93 Difference]: Finished difference Result 151 states and 293 transitions. [2021-07-13 19:14:00,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:14:00,269 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:14:00,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:00,270 INFO L225 Difference]: With dead ends: 151 [2021-07-13 19:14:00,270 INFO L226 Difference]: Without dead ends: 144 [2021-07-13 19:14:00,270 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 301.8ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:14:00,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-07-13 19:14:00,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 113. [2021-07-13 19:14:00,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0714285714285716) internal successors, (232), 112 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:00,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 232 transitions. [2021-07-13 19:14:00,271 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 232 transitions. Word has length 19 [2021-07-13 19:14:00,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:00,272 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 232 transitions. [2021-07-13 19:14:00,272 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:14:00,272 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 232 transitions. [2021-07-13 19:14:00,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:14:00,272 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:00,272 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:00,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable132 [2021-07-13 19:14:00,472 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:00,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:00,473 INFO L82 PathProgramCache]: Analyzing trace with hash 496199314, now seen corresponding path program 125 times [2021-07-13 19:14:00,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:00,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492910940] [2021-07-13 19:14:00,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:00,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:00,567 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:00,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:00,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492910940] [2021-07-13 19:14:00,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492910940] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:00,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016154887] [2021-07-13 19:14:00,567 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:00,589 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:14:00,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:00,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:14:00,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:00,796 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:00,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016154887] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:00,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:00,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:14:00,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952275897] [2021-07-13 19:14:00,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:14:00,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:00,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:14:00,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:14:00,798 INFO L87 Difference]: Start difference. First operand 113 states and 232 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:14:01,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:01,047 INFO L93 Difference]: Finished difference Result 138 states and 275 transitions. [2021-07-13 19:14:01,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:14:01,048 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:14:01,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:01,048 INFO L225 Difference]: With dead ends: 138 [2021-07-13 19:14:01,048 INFO L226 Difference]: Without dead ends: 131 [2021-07-13 19:14:01,048 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 296.0ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:14:01,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-07-13 19:14:01,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 111. [2021-07-13 19:14:01,049 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) [2021-07-13 19:14:01,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 225 transitions. [2021-07-13 19:14:01,049 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 225 transitions. Word has length 19 [2021-07-13 19:14:01,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:01,050 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 225 transitions. [2021-07-13 19:14:01,050 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:14:01,050 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 225 transitions. [2021-07-13 19:14:01,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:14:01,050 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:01,050 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:01,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-07-13 19:14:01,269 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:01,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:01,269 INFO L82 PathProgramCache]: Analyzing trace with hash -1668058018, now seen corresponding path program 126 times [2021-07-13 19:14:01,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:01,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347708489] [2021-07-13 19:14:01,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:01,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:01,364 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:01,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:01,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347708489] [2021-07-13 19:14:01,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347708489] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:01,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936401789] [2021-07-13 19:14:01,364 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:01,385 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:14:01,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:01,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:14:01,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:01,589 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:01,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936401789] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:01,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:01,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:14:01,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261718190] [2021-07-13 19:14:01,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:14:01,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:01,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:14:01,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:14:01,590 INFO L87 Difference]: Start difference. First operand 111 states and 225 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:14:01,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:01,847 INFO L93 Difference]: Finished difference Result 148 states and 289 transitions. [2021-07-13 19:14:01,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:14:01,847 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:14:01,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:01,848 INFO L225 Difference]: With dead ends: 148 [2021-07-13 19:14:01,848 INFO L226 Difference]: Without dead ends: 141 [2021-07-13 19:14:01,848 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 302.4ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:14:01,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-07-13 19:14:01,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 113. [2021-07-13 19:14:01,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0714285714285716) internal successors, (232), 112 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:01,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 232 transitions. [2021-07-13 19:14:01,849 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 232 transitions. Word has length 19 [2021-07-13 19:14:01,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:01,849 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 232 transitions. [2021-07-13 19:14:01,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:14:01,849 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 232 transitions. [2021-07-13 19:14:01,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:14:01,850 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:01,850 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:02,050 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-07-13 19:14:02,050 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:02,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:02,050 INFO L82 PathProgramCache]: Analyzing trace with hash -1652597222, now seen corresponding path program 127 times [2021-07-13 19:14:02,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:02,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40391829] [2021-07-13 19:14:02,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:02,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:02,147 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:02,147 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:02,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40391829] [2021-07-13 19:14:02,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40391829] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:02,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23321101] [2021-07-13 19:14:02,147 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 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 [2021-07-13 19:14:02,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:02,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:14:02,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:02,367 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:02,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23321101] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:02,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:02,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:14:02,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239529325] [2021-07-13 19:14:02,368 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:14:02,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:02,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:14:02,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:14:02,368 INFO L87 Difference]: Start difference. First operand 113 states and 232 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:14:02,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:02,611 INFO L93 Difference]: Finished difference Result 154 states and 300 transitions. [2021-07-13 19:14:02,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:14:02,611 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:14:02,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:02,612 INFO L225 Difference]: With dead ends: 154 [2021-07-13 19:14:02,612 INFO L226 Difference]: Without dead ends: 147 [2021-07-13 19:14:02,612 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 297.7ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:14:02,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-07-13 19:14:02,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 112. [2021-07-13 19:14:02,614 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) [2021-07-13 19:14:02,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 228 transitions. [2021-07-13 19:14:02,614 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 228 transitions. Word has length 19 [2021-07-13 19:14:02,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:02,614 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 228 transitions. [2021-07-13 19:14:02,614 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:14:02,614 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 228 transitions. [2021-07-13 19:14:02,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:14:02,614 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:02,614 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:02,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-07-13 19:14:02,817 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:02,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:02,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1081142416, now seen corresponding path program 128 times [2021-07-13 19:14:02,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:02,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586153779] [2021-07-13 19:14:02,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:02,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:02,905 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:02,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:02,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586153779] [2021-07-13 19:14:02,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586153779] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:02,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575175890] [2021-07-13 19:14:02,906 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:02,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:14:02,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:02,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:14:02,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:03,130 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:03,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575175890] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:03,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:03,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:14:03,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697531178] [2021-07-13 19:14:03,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:14:03,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:03,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:14:03,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:14:03,131 INFO L87 Difference]: Start difference. First operand 112 states and 228 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:14:03,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:03,314 INFO L93 Difference]: Finished difference Result 131 states and 259 transitions. [2021-07-13 19:14:03,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:14:03,314 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:14:03,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:03,314 INFO L225 Difference]: With dead ends: 131 [2021-07-13 19:14:03,314 INFO L226 Difference]: Without dead ends: 124 [2021-07-13 19:14:03,315 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 273.6ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:14:03,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-07-13 19:14:03,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 110. [2021-07-13 19:14:03,316 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) [2021-07-13 19:14:03,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 223 transitions. [2021-07-13 19:14:03,316 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 223 transitions. Word has length 19 [2021-07-13 19:14:03,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:03,316 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 223 transitions. [2021-07-13 19:14:03,316 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:14:03,316 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 223 transitions. [2021-07-13 19:14:03,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:14:03,316 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:03,316 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:03,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-07-13 19:14:03,517 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:03,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:03,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1532817690, now seen corresponding path program 129 times [2021-07-13 19:14:03,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:03,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158536483] [2021-07-13 19:14:03,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:03,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:03,610 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:03,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:03,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158536483] [2021-07-13 19:14:03,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158536483] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:03,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384559152] [2021-07-13 19:14:03,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:03,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:14:03,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:03,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:14:03,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:03,865 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:03,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384559152] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:03,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:03,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:14:03,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958731701] [2021-07-13 19:14:03,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:14:03,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:03,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:14:03,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:14:03,866 INFO L87 Difference]: Start difference. First operand 110 states and 223 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:14:04,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:04,162 INFO L93 Difference]: Finished difference Result 165 states and 320 transitions. [2021-07-13 19:14:04,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:14:04,163 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:14:04,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:04,163 INFO L225 Difference]: With dead ends: 165 [2021-07-13 19:14:04,163 INFO L226 Difference]: Without dead ends: 158 [2021-07-13 19:14:04,163 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 331.6ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:14:04,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-07-13 19:14:04,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 113. [2021-07-13 19:14:04,164 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) [2021-07-13 19:14:04,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 234 transitions. [2021-07-13 19:14:04,165 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 234 transitions. Word has length 19 [2021-07-13 19:14:04,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:04,165 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 234 transitions. [2021-07-13 19:14:04,165 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:14:04,165 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 234 transitions. [2021-07-13 19:14:04,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:14:04,165 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:04,165 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:04,365 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2021-07-13 19:14:04,366 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:04,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:04,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1548278486, now seen corresponding path program 130 times [2021-07-13 19:14:04,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:04,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149429761] [2021-07-13 19:14:04,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:04,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:04,456 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:04,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:04,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149429761] [2021-07-13 19:14:04,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149429761] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:04,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452721464] [2021-07-13 19:14:04,457 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 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 [2021-07-13 19:14:04,478 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:14:04,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:04,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:14:04,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:04,687 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:04,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452721464] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:04,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:04,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:14:04,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28068491] [2021-07-13 19:14:04,688 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:14:04,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:04,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:14:04,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:14:04,689 INFO L87 Difference]: Start difference. First operand 113 states and 234 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:14:04,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:04,965 INFO L93 Difference]: Finished difference Result 171 states and 331 transitions. [2021-07-13 19:14:04,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:14:04,966 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:14:04,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:04,966 INFO L225 Difference]: With dead ends: 171 [2021-07-13 19:14:04,966 INFO L226 Difference]: Without dead ends: 164 [2021-07-13 19:14:04,966 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 323.5ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:14:04,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-07-13 19:14:04,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 112. [2021-07-13 19:14:04,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.0720720720720722) internal successors, (230), 111 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) [2021-07-13 19:14:04,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 230 transitions. [2021-07-13 19:14:04,968 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 230 transitions. Word has length 19 [2021-07-13 19:14:04,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:04,968 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 230 transitions. [2021-07-13 19:14:04,968 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:14:04,968 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 230 transitions. [2021-07-13 19:14:04,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:14:04,968 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:04,968 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:05,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-07-13 19:14:05,169 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:05,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:05,169 INFO L82 PathProgramCache]: Analyzing trace with hash 2119733292, now seen corresponding path program 131 times [2021-07-13 19:14:05,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:05,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669565127] [2021-07-13 19:14:05,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:05,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:05,258 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:05,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:05,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669565127] [2021-07-13 19:14:05,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669565127] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:05,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520483337] [2021-07-13 19:14:05,259 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:05,281 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:14:05,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:05,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:14:05,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:05,485 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:05,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520483337] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:05,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:05,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:14:05,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070382623] [2021-07-13 19:14:05,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:14:05,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:05,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:14:05,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:14:05,486 INFO L87 Difference]: Start difference. First operand 112 states and 230 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:14:05,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:05,702 INFO L93 Difference]: Finished difference Result 150 states and 293 transitions. [2021-07-13 19:14:05,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:14:05,702 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:14:05,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:05,703 INFO L225 Difference]: With dead ends: 150 [2021-07-13 19:14:05,703 INFO L226 Difference]: Without dead ends: 143 [2021-07-13 19:14:05,703 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 271.4ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:14:05,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-07-13 19:14:05,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 111. [2021-07-13 19:14:05,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.0636363636363635) internal successors, (227), 110 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) [2021-07-13 19:14:05,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 227 transitions. [2021-07-13 19:14:05,704 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 227 transitions. Word has length 19 [2021-07-13 19:14:05,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:05,704 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 227 transitions. [2021-07-13 19:14:05,704 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:14:05,704 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 227 transitions. [2021-07-13 19:14:05,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:14:05,705 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:05,705 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:05,905 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-07-13 19:14:05,905 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:05,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:05,906 INFO L82 PathProgramCache]: Analyzing trace with hash -737818470, now seen corresponding path program 132 times [2021-07-13 19:14:05,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:05,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087120712] [2021-07-13 19:14:05,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:05,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:05,987 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:05,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:05,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087120712] [2021-07-13 19:14:05,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087120712] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:05,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316413827] [2021-07-13 19:14:05,987 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:06,013 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:14:06,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:06,013 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 19:14:06,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:06,216 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:06,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316413827] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:06,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:06,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-07-13 19:14:06,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845893282] [2021-07-13 19:14:06,217 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:14:06,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:06,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:14:06,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:14:06,217 INFO L87 Difference]: Start difference. First operand 111 states and 227 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:06,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:06,853 INFO L93 Difference]: Finished difference Result 197 states and 356 transitions. [2021-07-13 19:14:06,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:14:06,854 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:14:06,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:06,854 INFO L225 Difference]: With dead ends: 197 [2021-07-13 19:14:06,854 INFO L226 Difference]: Without dead ends: 156 [2021-07-13 19:14:06,854 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 676.0ms TimeCoverageRelationStatistics Valid=204, Invalid=918, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:14:06,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-07-13 19:14:06,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 116. [2021-07-13 19:14:06,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.0521739130434784) internal successors, (236), 115 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) [2021-07-13 19:14:06,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 236 transitions. [2021-07-13 19:14:06,856 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 236 transitions. Word has length 19 [2021-07-13 19:14:06,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:06,856 INFO L482 AbstractCegarLoop]: Abstraction has 116 states and 236 transitions. [2021-07-13 19:14:06,856 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:06,856 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 236 transitions. [2021-07-13 19:14:06,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:14:06,856 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:06,856 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:07,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:07,057 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:07,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:07,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1120538858, now seen corresponding path program 133 times [2021-07-13 19:14:07,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:07,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458270788] [2021-07-13 19:14:07,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:07,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:07,141 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:07,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:07,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458270788] [2021-07-13 19:14:07,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458270788] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:07,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241619251] [2021-07-13 19:14:07,141 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:07,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:07,163 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 19:14:07,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:07,369 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:07,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241619251] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:07,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:07,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-07-13 19:14:07,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838425721] [2021-07-13 19:14:07,370 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:14:07,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:07,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:14:07,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:14:07,370 INFO L87 Difference]: Start difference. First operand 116 states and 236 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:07,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:07,862 INFO L93 Difference]: Finished difference Result 160 states and 304 transitions. [2021-07-13 19:14:07,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:14:07,862 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:14:07,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:07,863 INFO L225 Difference]: With dead ends: 160 [2021-07-13 19:14:07,863 INFO L226 Difference]: Without dead ends: 153 [2021-07-13 19:14:07,863 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 498.6ms TimeCoverageRelationStatistics Valid=153, Invalid=717, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:14:07,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-07-13 19:14:07,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 112. [2021-07-13 19:14:07,864 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) [2021-07-13 19:14:07,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 228 transitions. [2021-07-13 19:14:07,864 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 228 transitions. Word has length 19 [2021-07-13 19:14:07,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:07,864 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 228 transitions. [2021-07-13 19:14:07,865 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:07,865 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 228 transitions. [2021-07-13 19:14:07,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:14:07,865 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:07,865 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:08,065 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:08,065 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:08,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:08,066 INFO L82 PathProgramCache]: Analyzing trace with hash 958754970, now seen corresponding path program 134 times [2021-07-13 19:14:08,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:08,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917527635] [2021-07-13 19:14:08,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:08,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:08,151 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:08,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:08,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917527635] [2021-07-13 19:14:08,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917527635] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:08,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133103399] [2021-07-13 19:14:08,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:08,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:14:08,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:08,174 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 19:14:08,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:08,418 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:08,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133103399] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:08,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:08,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-07-13 19:14:08,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828006113] [2021-07-13 19:14:08,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:14:08,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:08,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:14:08,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:14:08,419 INFO L87 Difference]: Start difference. First operand 112 states and 228 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:09,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:09,356 INFO L93 Difference]: Finished difference Result 223 states and 409 transitions. [2021-07-13 19:14:09,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-13 19:14:09,356 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:14:09,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:09,357 INFO L225 Difference]: With dead ends: 223 [2021-07-13 19:14:09,357 INFO L226 Difference]: Without dead ends: 216 [2021-07-13 19:14:09,357 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 866.6ms TimeCoverageRelationStatistics Valid=270, Invalid=1212, Unknown=0, NotChecked=0, Total=1482 [2021-07-13 19:14:09,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-07-13 19:14:09,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 113. [2021-07-13 19:14:09,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0714285714285716) internal successors, (232), 112 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:09,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 232 transitions. [2021-07-13 19:14:09,359 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 232 transitions. Word has length 19 [2021-07-13 19:14:09,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:09,359 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 232 transitions. [2021-07-13 19:14:09,359 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:09,359 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 232 transitions. [2021-07-13 19:14:09,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:14:09,359 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:09,359 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:09,559 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,143 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:09,560 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:09,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:09,560 INFO L82 PathProgramCache]: Analyzing trace with hash 974215766, now seen corresponding path program 135 times [2021-07-13 19:14:09,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:09,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061055439] [2021-07-13 19:14:09,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:09,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:09,668 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:09,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:09,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061055439] [2021-07-13 19:14:09,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061055439] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:09,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061914853] [2021-07-13 19:14:09,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:09,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:14:09,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:09,691 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 19:14:09,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:09,962 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:09,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061914853] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:09,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:09,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-07-13 19:14:09,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575408293] [2021-07-13 19:14:09,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-13 19:14:09,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:09,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-13 19:14:09,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:14:09,963 INFO L87 Difference]: Start difference. First operand 113 states and 232 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:10,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:10,834 INFO L93 Difference]: Finished difference Result 214 states and 397 transitions. [2021-07-13 19:14:10,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-13 19:14:10,835 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:14:10,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:10,835 INFO L225 Difference]: With dead ends: 214 [2021-07-13 19:14:10,835 INFO L226 Difference]: Without dead ends: 207 [2021-07-13 19:14:10,835 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 844.7ms TimeCoverageRelationStatistics Valid=272, Invalid=1450, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 19:14:10,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-07-13 19:14:10,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 111. [2021-07-13 19:14:10,837 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) [2021-07-13 19:14:10,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 225 transitions. [2021-07-13 19:14:10,837 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 225 transitions. Word has length 19 [2021-07-13 19:14:10,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:10,837 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 225 transitions. [2021-07-13 19:14:10,837 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:10,837 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 225 transitions. [2021-07-13 19:14:10,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:14:10,837 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:10,837 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:11,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:11,045 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:11,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:11,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1581877714, now seen corresponding path program 136 times [2021-07-13 19:14:11,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:11,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751457693] [2021-07-13 19:14:11,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:11,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:11,134 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:11,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:11,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751457693] [2021-07-13 19:14:11,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751457693] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:11,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166645391] [2021-07-13 19:14:11,135 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:11,156 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:14:11,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:11,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:14:11,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:11,369 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:11,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166645391] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:11,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:11,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:14:11,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755510639] [2021-07-13 19:14:11,369 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:14:11,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:11,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:14:11,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:14:11,370 INFO L87 Difference]: Start difference. First operand 111 states and 225 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:14:11,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:11,568 INFO L93 Difference]: Finished difference Result 137 states and 269 transitions. [2021-07-13 19:14:11,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:14:11,569 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:14:11,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:11,569 INFO L225 Difference]: With dead ends: 137 [2021-07-13 19:14:11,569 INFO L226 Difference]: Without dead ends: 130 [2021-07-13 19:14:11,569 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 291.8ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:14:11,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-07-13 19:14:11,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 111. [2021-07-13 19:14:11,570 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) [2021-07-13 19:14:11,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 225 transitions. [2021-07-13 19:14:11,571 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 225 transitions. Word has length 19 [2021-07-13 19:14:11,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:11,571 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 225 transitions. [2021-07-13 19:14:11,571 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:14:11,571 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 225 transitions. [2021-07-13 19:14:11,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:14:11,571 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:11,571 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:11,771 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-07-13 19:14:11,771 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:11,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:11,772 INFO L82 PathProgramCache]: Analyzing trace with hash 811172182, now seen corresponding path program 137 times [2021-07-13 19:14:11,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:11,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694187597] [2021-07-13 19:14:11,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:11,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:11,859 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:11,859 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:11,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694187597] [2021-07-13 19:14:11,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694187597] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:11,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769269] [2021-07-13 19:14:11,860 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:11,881 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:14:11,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:11,881 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 19:14:11,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:12,043 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:12,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769269] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:12,043 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:12,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:14:12,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109447423] [2021-07-13 19:14:12,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:14:12,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:12,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:14:12,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:14:12,044 INFO L87 Difference]: Start difference. First operand 111 states and 225 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:12,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:12,692 INFO L93 Difference]: Finished difference Result 235 states and 445 transitions. [2021-07-13 19:14:12,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:14:12,693 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:14:12,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:12,696 INFO L225 Difference]: With dead ends: 235 [2021-07-13 19:14:12,696 INFO L226 Difference]: Without dead ends: 228 [2021-07-13 19:14:12,696 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 598.8ms TimeCoverageRelationStatistics Valid=177, Invalid=945, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:14:12,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-07-13 19:14:12,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 115. [2021-07-13 19:14:12,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.0964912280701755) internal successors, (239), 114 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:12,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 239 transitions. [2021-07-13 19:14:12,698 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 239 transitions. Word has length 19 [2021-07-13 19:14:12,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:12,698 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 239 transitions. [2021-07-13 19:14:12,698 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:12,698 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 239 transitions. [2021-07-13 19:14:12,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:14:12,698 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:12,698 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:12,899 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-07-13 19:14:12,899 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:12,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:12,899 INFO L82 PathProgramCache]: Analyzing trace with hash 826632978, now seen corresponding path program 138 times [2021-07-13 19:14:12,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:12,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705704338] [2021-07-13 19:14:12,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:12,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:12,987 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:12,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:12,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705704338] [2021-07-13 19:14:12,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705704338] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:12,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321647793] [2021-07-13 19:14:12,987 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:13,010 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:14:13,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:13,010 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 19:14:13,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:13,172 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:13,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321647793] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:13,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:13,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:14:13,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189206253] [2021-07-13 19:14:13,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:14:13,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:13,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:14:13,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:14:13,173 INFO L87 Difference]: Start difference. First operand 115 states and 239 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:13,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:13,835 INFO L93 Difference]: Finished difference Result 235 states and 448 transitions. [2021-07-13 19:14:13,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:14:13,836 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:14:13,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:13,836 INFO L225 Difference]: With dead ends: 235 [2021-07-13 19:14:13,836 INFO L226 Difference]: Without dead ends: 228 [2021-07-13 19:14:13,836 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 603.0ms TimeCoverageRelationStatistics Valid=193, Invalid=929, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:14:13,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-07-13 19:14:13,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 114. [2021-07-13 19:14:13,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.079646017699115) internal successors, (235), 113 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) [2021-07-13 19:14:13,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 235 transitions. [2021-07-13 19:14:13,838 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 235 transitions. Word has length 19 [2021-07-13 19:14:13,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:13,838 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 235 transitions. [2021-07-13 19:14:13,838 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:13,838 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 235 transitions. [2021-07-13 19:14:13,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:14:13,839 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:13,839 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:14,062 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-07-13 19:14:14,062 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:14,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:14,062 INFO L82 PathProgramCache]: Analyzing trace with hash 1398087784, now seen corresponding path program 139 times [2021-07-13 19:14:14,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:14,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196427109] [2021-07-13 19:14:14,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:14,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:14,148 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:14,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:14,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196427109] [2021-07-13 19:14:14,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196427109] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:14,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315258740] [2021-07-13 19:14:14,148 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:14,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:14,169 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 19:14:14,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:14,342 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:14,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315258740] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:14,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:14,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:14:14,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329564778] [2021-07-13 19:14:14,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:14:14,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:14,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:14:14,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:14:14,343 INFO L87 Difference]: Start difference. First operand 114 states and 235 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:15,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:15,079 INFO L93 Difference]: Finished difference Result 201 states and 382 transitions. [2021-07-13 19:14:15,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-13 19:14:15,079 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:14:15,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:15,080 INFO L225 Difference]: With dead ends: 201 [2021-07-13 19:14:15,080 INFO L226 Difference]: Without dead ends: 194 [2021-07-13 19:14:15,080 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 686.8ms TimeCoverageRelationStatistics Valid=187, Invalid=935, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:14:15,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-07-13 19:14:15,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 113. [2021-07-13 19:14:15,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0714285714285716) internal successors, (232), 112 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:15,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 232 transitions. [2021-07-13 19:14:15,082 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 232 transitions. Word has length 19 [2021-07-13 19:14:15,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:15,082 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 232 transitions. [2021-07-13 19:14:15,082 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:15,082 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 232 transitions. [2021-07-13 19:14:15,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:14:15,083 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:15,083 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:15,283 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-07-13 19:14:15,283 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:15,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:15,284 INFO L82 PathProgramCache]: Analyzing trace with hash -1459463978, now seen corresponding path program 140 times [2021-07-13 19:14:15,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:15,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579094145] [2021-07-13 19:14:15,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:15,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:15,364 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:15,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:15,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579094145] [2021-07-13 19:14:15,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579094145] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:15,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195812855] [2021-07-13 19:14:15,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:15,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:14:15,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:15,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:14:15,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:15,591 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:15,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195812855] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:15,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:15,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:14:15,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018933926] [2021-07-13 19:14:15,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:14:15,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:15,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:14:15,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:14:15,592 INFO L87 Difference]: Start difference. First operand 113 states and 232 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:15,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:15,811 INFO L93 Difference]: Finished difference Result 157 states and 306 transitions. [2021-07-13 19:14:15,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:14:15,812 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:14:15,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:15,812 INFO L225 Difference]: With dead ends: 157 [2021-07-13 19:14:15,812 INFO L226 Difference]: Without dead ends: 150 [2021-07-13 19:14:15,812 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 277.0ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:14:15,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-07-13 19:14:15,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 113. [2021-07-13 19:14:15,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0714285714285716) internal successors, (232), 112 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:15,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 232 transitions. [2021-07-13 19:14:15,814 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 232 transitions. Word has length 19 [2021-07-13 19:14:15,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:15,814 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 232 transitions. [2021-07-13 19:14:15,814 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:15,814 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 232 transitions. [2021-07-13 19:14:15,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:14:15,814 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:15,814 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:16,014 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2021-07-13 19:14:16,015 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:16,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:16,015 INFO L82 PathProgramCache]: Analyzing trace with hash -1842184366, now seen corresponding path program 141 times [2021-07-13 19:14:16,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:16,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707663461] [2021-07-13 19:14:16,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:16,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:16,103 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:16,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:16,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707663461] [2021-07-13 19:14:16,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707663461] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:16,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911582910] [2021-07-13 19:14:16,104 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:14:16,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:14:16,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:16,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:14:16,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:16,333 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:16,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911582910] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:16,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:16,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:14:16,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68191341] [2021-07-13 19:14:16,334 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:14:16,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:16,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:14:16,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:14:16,334 INFO L87 Difference]: Start difference. First operand 113 states and 232 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:16,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:16,530 INFO L93 Difference]: Finished difference Result 161 states and 314 transitions. [2021-07-13 19:14:16,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:14:16,530 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:14:16,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:16,530 INFO L225 Difference]: With dead ends: 161 [2021-07-13 19:14:16,531 INFO L226 Difference]: Without dead ends: 154 [2021-07-13 19:14:16,531 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 276.4ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:14:16,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-07-13 19:14:16,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 114. [2021-07-13 19:14:16,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.079646017699115) internal successors, (235), 113 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) [2021-07-13 19:14:16,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 235 transitions. [2021-07-13 19:14:16,532 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 235 transitions. Word has length 19 [2021-07-13 19:14:16,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:16,532 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 235 transitions. [2021-07-13 19:14:16,532 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:16,532 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 235 transitions. [2021-07-13 19:14:16,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:14:16,533 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:16,533 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:16,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-07-13 19:14:16,737 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:16,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:16,737 INFO L82 PathProgramCache]: Analyzing trace with hash 237109462, now seen corresponding path program 142 times [2021-07-13 19:14:16,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:16,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65644199] [2021-07-13 19:14:16,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:16,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:16,828 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:16,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:16,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65644199] [2021-07-13 19:14:16,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65644199] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:16,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408727903] [2021-07-13 19:14:16,828 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:16,850 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:14:16,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:16,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:14:16,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:17,053 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:17,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408727903] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:17,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:17,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:14:17,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589295929] [2021-07-13 19:14:17,053 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:14:17,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:17,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:14:17,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:14:17,054 INFO L87 Difference]: Start difference. First operand 114 states and 235 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:17,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:17,302 INFO L93 Difference]: Finished difference Result 183 states and 354 transitions. [2021-07-13 19:14:17,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:14:17,303 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:14:17,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:17,303 INFO L225 Difference]: With dead ends: 183 [2021-07-13 19:14:17,303 INFO L226 Difference]: Without dead ends: 176 [2021-07-13 19:14:17,303 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 317.4ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:14:17,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-07-13 19:14:17,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 115. [2021-07-13 19:14:17,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.0964912280701755) internal successors, (239), 114 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:17,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 239 transitions. [2021-07-13 19:14:17,305 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 239 transitions. Word has length 19 [2021-07-13 19:14:17,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:17,306 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 239 transitions. [2021-07-13 19:14:17,306 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:17,306 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 239 transitions. [2021-07-13 19:14:17,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:14:17,306 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:17,306 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:17,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:17,509 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:17,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:17,509 INFO L82 PathProgramCache]: Analyzing trace with hash 252570258, now seen corresponding path program 143 times [2021-07-13 19:14:17,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:17,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254517325] [2021-07-13 19:14:17,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:17,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:17,602 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:17,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:17,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254517325] [2021-07-13 19:14:17,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254517325] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:17,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607830671] [2021-07-13 19:14:17,602 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:17,623 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:14:17,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:17,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:14:17,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:17,822 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:17,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607830671] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:17,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:17,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:14:17,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062483525] [2021-07-13 19:14:17,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:14:17,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:17,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:14:17,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:14:17,823 INFO L87 Difference]: Start difference. First operand 115 states and 239 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:18,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:18,058 INFO L93 Difference]: Finished difference Result 170 states and 336 transitions. [2021-07-13 19:14:18,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:14:18,059 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:14:18,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:18,059 INFO L225 Difference]: With dead ends: 170 [2021-07-13 19:14:18,059 INFO L226 Difference]: Without dead ends: 163 [2021-07-13 19:14:18,059 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 313.3ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:14:18,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-07-13 19:14:18,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 113. [2021-07-13 19:14:18,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0714285714285716) internal successors, (232), 112 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:18,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 232 transitions. [2021-07-13 19:14:18,061 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 232 transitions. Word has length 19 [2021-07-13 19:14:18,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:18,061 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 232 transitions. [2021-07-13 19:14:18,061 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:18,061 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 232 transitions. [2021-07-13 19:14:18,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:14:18,061 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:18,061 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:18,261 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:18,262 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:18,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:18,262 INFO L82 PathProgramCache]: Analyzing trace with hash 860232206, now seen corresponding path program 144 times [2021-07-13 19:14:18,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:18,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534037917] [2021-07-13 19:14:18,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:18,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:18,349 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:18,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:18,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534037917] [2021-07-13 19:14:18,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534037917] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:18,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033575256] [2021-07-13 19:14:18,349 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 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 [2021-07-13 19:14:18,376 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:14:18,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:18,377 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 19:14:18,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:18,549 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:18,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033575256] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:18,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:18,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:14:18,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833607061] [2021-07-13 19:14:18,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:14:18,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:18,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:14:18,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:14:18,554 INFO L87 Difference]: Start difference. First operand 113 states and 232 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:19,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:19,364 INFO L93 Difference]: Finished difference Result 215 states and 406 transitions. [2021-07-13 19:14:19,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:14:19,364 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:14:19,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:19,365 INFO L225 Difference]: With dead ends: 215 [2021-07-13 19:14:19,365 INFO L226 Difference]: Without dead ends: 138 [2021-07-13 19:14:19,365 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 758.2ms TimeCoverageRelationStatistics Valid=260, Invalid=1146, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 19:14:19,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-07-13 19:14:19,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 104. [2021-07-13 19:14:19,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.0388349514563107) internal successors, (210), 103 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) [2021-07-13 19:14:19,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 210 transitions. [2021-07-13 19:14:19,366 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 210 transitions. Word has length 19 [2021-07-13 19:14:19,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:19,366 INFO L482 AbstractCegarLoop]: Abstraction has 104 states and 210 transitions. [2021-07-13 19:14:19,366 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:19,366 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 210 transitions. [2021-07-13 19:14:19,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:14:19,366 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:19,367 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:19,567 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:19,567 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:19,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:19,567 INFO L82 PathProgramCache]: Analyzing trace with hash -829491834, now seen corresponding path program 145 times [2021-07-13 19:14:19,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:19,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623729837] [2021-07-13 19:14:19,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:19,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:19,652 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:19,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:19,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623729837] [2021-07-13 19:14:19,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623729837] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:19,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514448778] [2021-07-13 19:14:19,653 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:19,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:19,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:14:19,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:19,888 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:19,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514448778] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:19,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:19,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:14:19,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282601604] [2021-07-13 19:14:19,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:14:19,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:19,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:14:19,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:14:19,889 INFO L87 Difference]: Start difference. First operand 104 states and 210 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:20,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:20,080 INFO L93 Difference]: Finished difference Result 126 states and 247 transitions. [2021-07-13 19:14:20,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:14:20,080 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:14:20,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:20,080 INFO L225 Difference]: With dead ends: 126 [2021-07-13 19:14:20,081 INFO L226 Difference]: Without dead ends: 119 [2021-07-13 19:14:20,081 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 277.2ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:14:20,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-07-13 19:14:20,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 106. [2021-07-13 19:14:20,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.0476190476190474) internal successors, (215), 105 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:20,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 215 transitions. [2021-07-13 19:14:20,082 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 215 transitions. Word has length 19 [2021-07-13 19:14:20,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:20,082 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 215 transitions. [2021-07-13 19:14:20,082 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:20,082 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 215 transitions. [2021-07-13 19:14:20,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:14:20,082 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:20,082 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:20,283 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:20,283 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:20,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:20,283 INFO L82 PathProgramCache]: Analyzing trace with hash 1249801994, now seen corresponding path program 146 times [2021-07-13 19:14:20,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:20,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123444573] [2021-07-13 19:14:20,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:20,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:20,379 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:20,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:20,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123444573] [2021-07-13 19:14:20,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123444573] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:20,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12849673] [2021-07-13 19:14:20,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:20,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:14:20,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:20,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:14:20,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:20,620 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:20,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12849673] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:20,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:20,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:14:20,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391297941] [2021-07-13 19:14:20,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:14:20,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:20,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:14:20,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:14:20,621 INFO L87 Difference]: Start difference. First operand 106 states and 215 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:20,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:20,890 INFO L93 Difference]: Finished difference Result 149 states and 288 transitions. [2021-07-13 19:14:20,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:14:20,891 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:14:20,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:20,891 INFO L225 Difference]: With dead ends: 149 [2021-07-13 19:14:20,891 INFO L226 Difference]: Without dead ends: 142 [2021-07-13 19:14:20,891 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 303.6ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:14:20,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-07-13 19:14:20,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 107. [2021-07-13 19:14:20,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0660377358490565) internal successors, (219), 106 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) [2021-07-13 19:14:20,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 219 transitions. [2021-07-13 19:14:20,893 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 219 transitions. Word has length 19 [2021-07-13 19:14:20,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:20,893 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 219 transitions. [2021-07-13 19:14:20,893 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:20,893 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 219 transitions. [2021-07-13 19:14:20,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:14:20,893 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:20,893 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:21,093 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,155 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:21,094 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:21,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:21,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1265262790, now seen corresponding path program 147 times [2021-07-13 19:14:21,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:21,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798519173] [2021-07-13 19:14:21,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:21,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:21,181 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:21,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:21,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798519173] [2021-07-13 19:14:21,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798519173] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:21,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167828345] [2021-07-13 19:14:21,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:21,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:14:21,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:21,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:14:21,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:21,412 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:21,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167828345] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:21,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:21,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:14:21,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6228081] [2021-07-13 19:14:21,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:14:21,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:21,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:14:21,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:14:21,413 INFO L87 Difference]: Start difference. First operand 107 states and 219 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:21,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:21,607 INFO L93 Difference]: Finished difference Result 136 states and 270 transitions. [2021-07-13 19:14:21,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:14:21,607 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:14:21,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:21,607 INFO L225 Difference]: With dead ends: 136 [2021-07-13 19:14:21,607 INFO L226 Difference]: Without dead ends: 129 [2021-07-13 19:14:21,607 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 304.8ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:14:21,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-07-13 19:14:21,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 105. [2021-07-13 19:14:21,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.0384615384615383) internal successors, (212), 104 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:21,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 212 transitions. [2021-07-13 19:14:21,609 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 212 transitions. Word has length 19 [2021-07-13 19:14:21,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:21,609 INFO L482 AbstractCegarLoop]: Abstraction has 105 states and 212 transitions. [2021-07-13 19:14:21,609 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:21,609 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 212 transitions. [2021-07-13 19:14:21,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:14:21,609 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:21,609 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:21,810 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:21,810 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:21,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:21,810 INFO L82 PathProgramCache]: Analyzing trace with hash -898994542, now seen corresponding path program 148 times [2021-07-13 19:14:21,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:21,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012421273] [2021-07-13 19:14:21,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:21,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:21,897 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:21,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:21,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012421273] [2021-07-13 19:14:21,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012421273] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:21,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864095578] [2021-07-13 19:14:21,898 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:21,918 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:14:21,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:21,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:14:21,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:22,132 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:22,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864095578] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:22,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:22,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:14:22,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145732974] [2021-07-13 19:14:22,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:14:22,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:22,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:14:22,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:14:22,133 INFO L87 Difference]: Start difference. First operand 105 states and 212 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:22,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:22,380 INFO L93 Difference]: Finished difference Result 146 states and 284 transitions. [2021-07-13 19:14:22,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:14:22,380 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:14:22,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:22,381 INFO L225 Difference]: With dead ends: 146 [2021-07-13 19:14:22,381 INFO L226 Difference]: Without dead ends: 139 [2021-07-13 19:14:22,381 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 299.5ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:14:22,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-07-13 19:14:22,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 107. [2021-07-13 19:14:22,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0660377358490565) internal successors, (219), 106 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) [2021-07-13 19:14:22,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 219 transitions. [2021-07-13 19:14:22,382 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 219 transitions. Word has length 19 [2021-07-13 19:14:22,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:22,382 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 219 transitions. [2021-07-13 19:14:22,382 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:22,382 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 219 transitions. [2021-07-13 19:14:22,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:14:22,383 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:22,383 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:22,583 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-07-13 19:14:22,583 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:22,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:22,584 INFO L82 PathProgramCache]: Analyzing trace with hash -883533746, now seen corresponding path program 149 times [2021-07-13 19:14:22,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:22,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513387046] [2021-07-13 19:14:22,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:22,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:22,680 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:22,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:22,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513387046] [2021-07-13 19:14:22,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513387046] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:22,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321163715] [2021-07-13 19:14:22,680 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:22,702 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:14:22,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:22,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:14:22,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:22,914 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:22,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321163715] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:22,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:22,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:14:22,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474234231] [2021-07-13 19:14:22,915 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:14:22,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:22,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:14:22,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:14:22,915 INFO L87 Difference]: Start difference. First operand 107 states and 219 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:23,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:23,114 INFO L93 Difference]: Finished difference Result 152 states and 295 transitions. [2021-07-13 19:14:23,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:14:23,114 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:14:23,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:23,115 INFO L225 Difference]: With dead ends: 152 [2021-07-13 19:14:23,115 INFO L226 Difference]: Without dead ends: 145 [2021-07-13 19:14:23,115 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 304.7ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:14:23,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-07-13 19:14:23,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 106. [2021-07-13 19:14:23,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.0476190476190474) internal successors, (215), 105 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:23,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 215 transitions. [2021-07-13 19:14:23,117 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 215 transitions. Word has length 19 [2021-07-13 19:14:23,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:23,117 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 215 transitions. [2021-07-13 19:14:23,117 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:23,117 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 215 transitions. [2021-07-13 19:14:23,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:14:23,117 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:23,117 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:23,339 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-07-13 19:14:23,340 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:23,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:23,340 INFO L82 PathProgramCache]: Analyzing trace with hash -312078940, now seen corresponding path program 150 times [2021-07-13 19:14:23,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:23,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105323438] [2021-07-13 19:14:23,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:23,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:23,425 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:23,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:23,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105323438] [2021-07-13 19:14:23,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105323438] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:23,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271831569] [2021-07-13 19:14:23,425 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 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 [2021-07-13 19:14:23,446 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:14:23,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:23,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:14:23,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:23,656 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:23,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271831569] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:23,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:23,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:14:23,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886991766] [2021-07-13 19:14:23,656 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:14:23,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:23,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:14:23,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:14:23,657 INFO L87 Difference]: Start difference. First operand 106 states and 215 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:23,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:23,842 INFO L93 Difference]: Finished difference Result 129 states and 254 transitions. [2021-07-13 19:14:23,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:14:23,843 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:14:23,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:23,843 INFO L225 Difference]: With dead ends: 129 [2021-07-13 19:14:23,843 INFO L226 Difference]: Without dead ends: 122 [2021-07-13 19:14:23,843 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 273.7ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:14:23,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-07-13 19:14:23,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 103. [2021-07-13 19:14:23,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.0392156862745097) internal successors, (208), 102 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) [2021-07-13 19:14:23,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 208 transitions. [2021-07-13 19:14:23,844 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 208 transitions. Word has length 19 [2021-07-13 19:14:23,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:23,845 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 208 transitions. [2021-07-13 19:14:23,845 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:23,845 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 208 transitions. [2021-07-13 19:14:23,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:14:23,845 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:23,845 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:24,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-07-13 19:14:24,045 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:24,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:24,046 INFO L82 PathProgramCache]: Analyzing trace with hash 56306446, now seen corresponding path program 151 times [2021-07-13 19:14:24,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:24,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964853610] [2021-07-13 19:14:24,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:24,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:24,139 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:24,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:24,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964853610] [2021-07-13 19:14:24,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964853610] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:24,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482776015] [2021-07-13 19:14:24,139 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:24,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:24,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:14:24,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:24,366 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:24,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482776015] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:24,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:24,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:14:24,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449971938] [2021-07-13 19:14:24,367 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:14:24,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:24,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:14:24,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:14:24,367 INFO L87 Difference]: Start difference. First operand 103 states and 208 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:24,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:24,540 INFO L93 Difference]: Finished difference Result 130 states and 255 transitions. [2021-07-13 19:14:24,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:14:24,540 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:14:24,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:24,540 INFO L225 Difference]: With dead ends: 130 [2021-07-13 19:14:24,540 INFO L226 Difference]: Without dead ends: 123 [2021-07-13 19:14:24,541 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 271.5ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:14:24,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-07-13 19:14:24,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 106. [2021-07-13 19:14:24,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.057142857142857) internal successors, (216), 105 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) [2021-07-13 19:14:24,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 216 transitions. [2021-07-13 19:14:24,542 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 216 transitions. Word has length 19 [2021-07-13 19:14:24,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:24,542 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 216 transitions. [2021-07-13 19:14:24,542 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:24,542 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 216 transitions. [2021-07-13 19:14:24,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:14:24,542 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:24,542 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:24,742 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:24,743 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:24,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:24,743 INFO L82 PathProgramCache]: Analyzing trace with hash 2135600274, now seen corresponding path program 152 times [2021-07-13 19:14:24,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:24,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325533324] [2021-07-13 19:14:24,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:24,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:24,832 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:24,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:24,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325533324] [2021-07-13 19:14:24,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325533324] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:24,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546961896] [2021-07-13 19:14:24,832 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 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 [2021-07-13 19:14:24,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:14:24,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:24,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:14:24,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:25,056 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:25,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546961896] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:25,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:25,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:14:25,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747892829] [2021-07-13 19:14:25,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:14:25,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:25,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:14:25,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:14:25,057 INFO L87 Difference]: Start difference. First operand 106 states and 216 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:25,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:25,267 INFO L93 Difference]: Finished difference Result 153 states and 296 transitions. [2021-07-13 19:14:25,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:14:25,268 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:14:25,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:25,268 INFO L225 Difference]: With dead ends: 153 [2021-07-13 19:14:25,268 INFO L226 Difference]: Without dead ends: 146 [2021-07-13 19:14:25,268 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 296.6ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:14:25,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-07-13 19:14:25,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 107. [2021-07-13 19:14:25,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0754716981132075) internal successors, (220), 106 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:25,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 220 transitions. [2021-07-13 19:14:25,270 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 220 transitions. Word has length 19 [2021-07-13 19:14:25,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:25,270 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 220 transitions. [2021-07-13 19:14:25,270 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:25,270 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 220 transitions. [2021-07-13 19:14:25,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:14:25,270 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:25,270 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:25,470 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable160 [2021-07-13 19:14:25,471 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:25,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:25,471 INFO L82 PathProgramCache]: Analyzing trace with hash -2143906226, now seen corresponding path program 153 times [2021-07-13 19:14:25,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:25,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587104621] [2021-07-13 19:14:25,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:25,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:25,557 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:25,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:25,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587104621] [2021-07-13 19:14:25,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587104621] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:25,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199636092] [2021-07-13 19:14:25,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:25,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:14:25,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:25,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:14:25,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:25,787 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:25,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199636092] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:25,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:25,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:14:25,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562439523] [2021-07-13 19:14:25,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:14:25,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:25,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:14:25,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:14:25,788 INFO L87 Difference]: Start difference. First operand 107 states and 220 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:26,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:26,061 INFO L93 Difference]: Finished difference Result 140 states and 278 transitions. [2021-07-13 19:14:26,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:14:26,061 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:14:26,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:26,061 INFO L225 Difference]: With dead ends: 140 [2021-07-13 19:14:26,061 INFO L226 Difference]: Without dead ends: 133 [2021-07-13 19:14:26,062 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 303.0ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:14:26,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-07-13 19:14:26,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 105. [2021-07-13 19:14:26,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.048076923076923) internal successors, (213), 104 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) [2021-07-13 19:14:26,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 213 transitions. [2021-07-13 19:14:26,063 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 213 transitions. Word has length 19 [2021-07-13 19:14:26,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:26,063 INFO L482 AbstractCegarLoop]: Abstraction has 105 states and 213 transitions. [2021-07-13 19:14:26,063 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:26,063 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 213 transitions. [2021-07-13 19:14:26,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:14:26,063 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:26,063 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:26,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:26,269 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:26,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:26,269 INFO L82 PathProgramCache]: Analyzing trace with hash -13196262, now seen corresponding path program 154 times [2021-07-13 19:14:26,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:26,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616524550] [2021-07-13 19:14:26,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:26,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:26,369 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:26,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:26,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616524550] [2021-07-13 19:14:26,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616524550] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:26,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677473678] [2021-07-13 19:14:26,369 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:26,390 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:14:26,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:26,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:14:26,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:26,600 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:26,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677473678] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:26,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:26,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:14:26,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124449560] [2021-07-13 19:14:26,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:14:26,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:26,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:14:26,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:14:26,601 INFO L87 Difference]: Start difference. First operand 105 states and 213 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:26,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:26,871 INFO L93 Difference]: Finished difference Result 150 states and 292 transitions. [2021-07-13 19:14:26,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:14:26,872 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:14:26,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:26,872 INFO L225 Difference]: With dead ends: 150 [2021-07-13 19:14:26,872 INFO L226 Difference]: Without dead ends: 143 [2021-07-13 19:14:26,872 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 321.0ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:14:26,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-07-13 19:14:26,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 107. [2021-07-13 19:14:26,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0754716981132075) internal successors, (220), 106 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:26,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 220 transitions. [2021-07-13 19:14:26,874 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 220 transitions. Word has length 19 [2021-07-13 19:14:26,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:26,874 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 220 transitions. [2021-07-13 19:14:26,874 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:26,874 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 220 transitions. [2021-07-13 19:14:26,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:14:26,875 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:26,875 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:27,075 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:27,075 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:27,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:27,076 INFO L82 PathProgramCache]: Analyzing trace with hash 2264534, now seen corresponding path program 155 times [2021-07-13 19:14:27,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:27,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53368028] [2021-07-13 19:14:27,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:27,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:27,163 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:27,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:27,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53368028] [2021-07-13 19:14:27,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53368028] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:27,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227298379] [2021-07-13 19:14:27,163 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:14:27,184 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:14:27,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:27,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:14:27,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:27,393 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:27,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227298379] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:27,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:27,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:14:27,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041138202] [2021-07-13 19:14:27,393 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:14:27,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:27,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:14:27,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:14:27,394 INFO L87 Difference]: Start difference. First operand 107 states and 220 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:27,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:27,665 INFO L93 Difference]: Finished difference Result 156 states and 303 transitions. [2021-07-13 19:14:27,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:14:27,665 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:14:27,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:27,665 INFO L225 Difference]: With dead ends: 156 [2021-07-13 19:14:27,666 INFO L226 Difference]: Without dead ends: 149 [2021-07-13 19:14:27,666 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 306.3ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:14:27,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-07-13 19:14:27,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 106. [2021-07-13 19:14:27,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.057142857142857) internal successors, (216), 105 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) [2021-07-13 19:14:27,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 216 transitions. [2021-07-13 19:14:27,667 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 216 transitions. Word has length 19 [2021-07-13 19:14:27,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:27,667 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 216 transitions. [2021-07-13 19:14:27,667 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:27,667 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 216 transitions. [2021-07-13 19:14:27,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:14:27,667 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:27,667 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:27,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable163 [2021-07-13 19:14:27,868 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:27,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:27,868 INFO L82 PathProgramCache]: Analyzing trace with hash 573719340, now seen corresponding path program 156 times [2021-07-13 19:14:27,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:27,868 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898958015] [2021-07-13 19:14:27,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:27,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:27,971 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:27,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:27,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898958015] [2021-07-13 19:14:27,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898958015] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:27,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299323864] [2021-07-13 19:14:27,971 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:28,002 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:14:28,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:28,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:14:28,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:28,213 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:28,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299323864] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:28,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:28,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:14:28,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131306527] [2021-07-13 19:14:28,214 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:14:28,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:28,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:14:28,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:14:28,214 INFO L87 Difference]: Start difference. First operand 106 states and 216 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:28,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:28,413 INFO L93 Difference]: Finished difference Result 133 states and 262 transitions. [2021-07-13 19:14:28,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:14:28,414 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:14:28,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:28,414 INFO L225 Difference]: With dead ends: 133 [2021-07-13 19:14:28,414 INFO L226 Difference]: Without dead ends: 126 [2021-07-13 19:14:28,414 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 286.1ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:14:28,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-07-13 19:14:28,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 104. [2021-07-13 19:14:28,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.0485436893203883) internal successors, (211), 103 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) [2021-07-13 19:14:28,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 211 transitions. [2021-07-13 19:14:28,415 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 211 transitions. Word has length 19 [2021-07-13 19:14:28,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:28,416 INFO L482 AbstractCegarLoop]: Abstraction has 104 states and 211 transitions. [2021-07-13 19:14:28,416 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:28,416 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 211 transitions. [2021-07-13 19:14:28,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:14:28,416 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:28,416 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:28,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:28,616 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:28,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:28,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1107287850, now seen corresponding path program 157 times [2021-07-13 19:14:28,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:28,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16852819] [2021-07-13 19:14:28,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:28,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:28,704 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:28,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:28,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16852819] [2021-07-13 19:14:28,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16852819] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:28,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203125713] [2021-07-13 19:14:28,705 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:28,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:28,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:14:28,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:28,927 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:28,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203125713] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:28,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:28,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:14:28,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595866288] [2021-07-13 19:14:28,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:14:28,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:28,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:14:28,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:14:28,928 INFO L87 Difference]: Start difference. First operand 104 states and 211 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:29,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:29,209 INFO L93 Difference]: Finished difference Result 168 states and 326 transitions. [2021-07-13 19:14:29,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:14:29,209 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:14:29,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:29,209 INFO L225 Difference]: With dead ends: 168 [2021-07-13 19:14:29,209 INFO L226 Difference]: Without dead ends: 161 [2021-07-13 19:14:29,210 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 317.5ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:14:29,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-07-13 19:14:29,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 107. [2021-07-13 19:14:29,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0943396226415096) internal successors, (222), 106 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:29,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 222 transitions. [2021-07-13 19:14:29,214 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 222 transitions. Word has length 19 [2021-07-13 19:14:29,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:29,214 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 222 transitions. [2021-07-13 19:14:29,214 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:29,214 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 222 transitions. [2021-07-13 19:14:29,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:14:29,214 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:29,214 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:29,414 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:29,415 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:29,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:29,415 INFO L82 PathProgramCache]: Analyzing trace with hash -1091827054, now seen corresponding path program 158 times [2021-07-13 19:14:29,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:29,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770221208] [2021-07-13 19:14:29,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:29,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:29,505 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:29,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:29,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770221208] [2021-07-13 19:14:29,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770221208] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:29,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079911384] [2021-07-13 19:14:29,506 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:29,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:14:29,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:29,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:14:29,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:29,773 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:29,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079911384] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:29,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:29,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:14:29,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528710280] [2021-07-13 19:14:29,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:14:29,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:29,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:14:29,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:14:29,774 INFO L87 Difference]: Start difference. First operand 107 states and 222 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:30,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:30,120 INFO L93 Difference]: Finished difference Result 174 states and 337 transitions. [2021-07-13 19:14:30,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:14:30,120 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:14:30,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:30,121 INFO L225 Difference]: With dead ends: 174 [2021-07-13 19:14:30,121 INFO L226 Difference]: Without dead ends: 167 [2021-07-13 19:14:30,121 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 347.0ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:14:30,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-07-13 19:14:30,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 106. [2021-07-13 19:14:30,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.0761904761904764) internal successors, (218), 105 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) [2021-07-13 19:14:30,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 218 transitions. [2021-07-13 19:14:30,122 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 218 transitions. Word has length 19 [2021-07-13 19:14:30,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:30,122 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 218 transitions. [2021-07-13 19:14:30,122 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:30,123 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 218 transitions. [2021-07-13 19:14:30,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:14:30,123 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:30,123 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:30,323 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-07-13 19:14:30,323 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:30,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:30,324 INFO L82 PathProgramCache]: Analyzing trace with hash -520372248, now seen corresponding path program 159 times [2021-07-13 19:14:30,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:30,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443582633] [2021-07-13 19:14:30,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:30,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:30,411 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:30,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:30,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443582633] [2021-07-13 19:14:30,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443582633] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:30,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921933282] [2021-07-13 19:14:30,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:30,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:14:30,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:30,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:14:30,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:30,639 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:30,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921933282] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:30,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:30,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:14:30,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340614830] [2021-07-13 19:14:30,640 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:14:30,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:30,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:14:30,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:14:30,640 INFO L87 Difference]: Start difference. First operand 106 states and 218 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:30,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:30,827 INFO L93 Difference]: Finished difference Result 153 states and 299 transitions. [2021-07-13 19:14:30,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:14:30,827 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:14:30,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:30,828 INFO L225 Difference]: With dead ends: 153 [2021-07-13 19:14:30,828 INFO L226 Difference]: Without dead ends: 146 [2021-07-13 19:14:30,828 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 271.9ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:14:30,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-07-13 19:14:30,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 105. [2021-07-13 19:14:30,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.0673076923076925) internal successors, (215), 104 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) [2021-07-13 19:14:30,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 215 transitions. [2021-07-13 19:14:30,829 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 215 transitions. Word has length 19 [2021-07-13 19:14:30,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:30,829 INFO L482 AbstractCegarLoop]: Abstraction has 105 states and 215 transitions. [2021-07-13 19:14:30,830 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:30,830 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 215 transitions. [2021-07-13 19:14:30,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:14:30,830 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:30,830 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:31,030 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-07-13 19:14:31,030 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:31,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:31,031 INFO L82 PathProgramCache]: Analyzing trace with hash 917043286, now seen corresponding path program 160 times [2021-07-13 19:14:31,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:31,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956729906] [2021-07-13 19:14:31,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:31,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:31,111 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:31,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:31,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956729906] [2021-07-13 19:14:31,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956729906] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:31,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241599426] [2021-07-13 19:14:31,111 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:31,131 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:14:31,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:31,132 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 19:14:31,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:31,294 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:31,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241599426] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:31,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:31,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:14:31,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078871842] [2021-07-13 19:14:31,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:14:31,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:31,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:14:31,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:14:31,295 INFO L87 Difference]: Start difference. First operand 105 states and 215 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:31,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:31,915 INFO L93 Difference]: Finished difference Result 196 states and 368 transitions. [2021-07-13 19:14:31,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:14:31,916 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:14:31,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:31,916 INFO L225 Difference]: With dead ends: 196 [2021-07-13 19:14:31,916 INFO L226 Difference]: Without dead ends: 149 [2021-07-13 19:14:31,916 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 603.2ms TimeCoverageRelationStatistics Valid=219, Invalid=903, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:14:31,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-07-13 19:14:31,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 117. [2021-07-13 19:14:31,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.086206896551724) internal successors, (242), 116 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) [2021-07-13 19:14:31,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 242 transitions. [2021-07-13 19:14:31,918 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 242 transitions. Word has length 19 [2021-07-13 19:14:31,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:31,918 INFO L482 AbstractCegarLoop]: Abstraction has 117 states and 242 transitions. [2021-07-13 19:14:31,918 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:31,918 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 242 transitions. [2021-07-13 19:14:31,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:14:31,919 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:31,919 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:32,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-07-13 19:14:32,133 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:32,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:32,133 INFO L82 PathProgramCache]: Analyzing trace with hash 534322898, now seen corresponding path program 161 times [2021-07-13 19:14:32,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:32,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036382586] [2021-07-13 19:14:32,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:32,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:32,215 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:32,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:32,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036382586] [2021-07-13 19:14:32,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036382586] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:32,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855505538] [2021-07-13 19:14:32,215 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:14:32,236 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:14:32,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:32,236 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 19:14:32,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:32,555 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:32,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855505538] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:32,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:32,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:14:32,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748266721] [2021-07-13 19:14:32,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:14:32,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:32,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:14:32,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:14:32,556 INFO L87 Difference]: Start difference. First operand 117 states and 242 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:32,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:32,970 INFO L93 Difference]: Finished difference Result 156 states and 310 transitions. [2021-07-13 19:14:32,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:14:32,970 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:14:32,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:32,970 INFO L225 Difference]: With dead ends: 156 [2021-07-13 19:14:32,971 INFO L226 Difference]: Without dead ends: 149 [2021-07-13 19:14:32,971 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 462.9ms TimeCoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:14:32,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-07-13 19:14:32,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 113. [2021-07-13 19:14:32,972 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) [2021-07-13 19:14:32,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 234 transitions. [2021-07-13 19:14:32,972 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 234 transitions. Word has length 19 [2021-07-13 19:14:32,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:32,972 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 234 transitions. [2021-07-13 19:14:32,972 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:32,972 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 234 transitions. [2021-07-13 19:14:32,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:14:32,972 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:32,973 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:33,173 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-07-13 19:14:33,173 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:33,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:33,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1681350570, now seen corresponding path program 162 times [2021-07-13 19:14:33,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:33,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939766167] [2021-07-13 19:14:33,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:33,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:33,268 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:33,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:33,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939766167] [2021-07-13 19:14:33,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939766167] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:33,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895826046] [2021-07-13 19:14:33,268 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:33,290 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:14:33,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:33,290 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 19:14:33,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:33,510 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:33,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895826046] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:33,511 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:33,511 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:14:33,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333462798] [2021-07-13 19:14:33,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:14:33,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:33,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:14:33,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:14:33,511 INFO L87 Difference]: Start difference. First operand 113 states and 234 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:34,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:34,105 INFO L93 Difference]: Finished difference Result 206 states and 402 transitions. [2021-07-13 19:14:34,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 19:14:34,105 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:14:34,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:34,106 INFO L225 Difference]: With dead ends: 206 [2021-07-13 19:14:34,106 INFO L226 Difference]: Without dead ends: 199 [2021-07-13 19:14:34,106 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 616.7ms TimeCoverageRelationStatistics Valid=204, Invalid=986, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:14:34,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-07-13 19:14:34,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 114. [2021-07-13 19:14:34,107 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) [2021-07-13 19:14:34,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 238 transitions. [2021-07-13 19:14:34,107 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 238 transitions. Word has length 19 [2021-07-13 19:14:34,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:34,107 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 238 transitions. [2021-07-13 19:14:34,107 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:34,108 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 238 transitions. [2021-07-13 19:14:34,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:14:34,108 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:34,108 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:34,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable170 [2021-07-13 19:14:34,308 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:34,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:34,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1665889774, now seen corresponding path program 163 times [2021-07-13 19:14:34,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:34,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478077733] [2021-07-13 19:14:34,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:34,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:34,396 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:34,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:34,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478077733] [2021-07-13 19:14:34,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478077733] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:34,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001811574] [2021-07-13 19:14:34,396 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:34,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:34,417 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 19:14:34,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:34,932 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:34,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001811574] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:34,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:34,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:14:34,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013425813] [2021-07-13 19:14:34,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:14:34,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:34,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:14:34,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:14:34,933 INFO L87 Difference]: Start difference. First operand 114 states and 238 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:35,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:35,585 INFO L93 Difference]: Finished difference Result 197 states and 390 transitions. [2021-07-13 19:14:35,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 19:14:35,585 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:14:35,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:35,586 INFO L225 Difference]: With dead ends: 197 [2021-07-13 19:14:35,586 INFO L226 Difference]: Without dead ends: 190 [2021-07-13 19:14:35,586 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 624.4ms TimeCoverageRelationStatistics Valid=204, Invalid=1056, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 19:14:35,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-07-13 19:14:35,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 112. [2021-07-13 19:14:35,587 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) [2021-07-13 19:14:35,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 231 transitions. [2021-07-13 19:14:35,588 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 231 transitions. Word has length 19 [2021-07-13 19:14:35,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:35,588 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 231 transitions. [2021-07-13 19:14:35,588 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:35,588 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 231 transitions. [2021-07-13 19:14:35,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:14:35,588 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:35,588 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:35,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:35,789 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:35,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:35,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1058227826, now seen corresponding path program 164 times [2021-07-13 19:14:35,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:35,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032765282] [2021-07-13 19:14:35,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:35,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:35,871 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:35,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:35,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032765282] [2021-07-13 19:14:35,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032765282] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:35,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718999166] [2021-07-13 19:14:35,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:35,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:14:35,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:35,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:14:35,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:36,090 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:36,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718999166] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:36,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:36,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:14:36,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004331634] [2021-07-13 19:14:36,091 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:14:36,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:36,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:14:36,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:14:36,091 INFO L87 Difference]: Start difference. First operand 112 states and 231 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:36,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:36,286 INFO L93 Difference]: Finished difference Result 158 states and 311 transitions. [2021-07-13 19:14:36,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:14:36,287 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:14:36,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:36,287 INFO L225 Difference]: With dead ends: 158 [2021-07-13 19:14:36,287 INFO L226 Difference]: Without dead ends: 151 [2021-07-13 19:14:36,287 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 276.1ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:14:36,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-07-13 19:14:36,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 109. [2021-07-13 19:14:36,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.074074074074074) internal successors, (224), 108 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:36,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 224 transitions. [2021-07-13 19:14:36,289 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 224 transitions. Word has length 19 [2021-07-13 19:14:36,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:36,289 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 224 transitions. [2021-07-13 19:14:36,289 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:36,289 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 224 transitions. [2021-07-13 19:14:36,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:14:36,289 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:36,289 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:36,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:36,490 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:36,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:36,490 INFO L82 PathProgramCache]: Analyzing trace with hash -1703746494, now seen corresponding path program 165 times [2021-07-13 19:14:36,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:36,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444107512] [2021-07-13 19:14:36,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:36,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:36,592 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:36,593 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:36,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444107512] [2021-07-13 19:14:36,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444107512] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:36,593 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370733589] [2021-07-13 19:14:36,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:36,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:14:36,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:36,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:14:36,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:36,859 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:36,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370733589] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:36,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:36,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:14:36,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669009958] [2021-07-13 19:14:36,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:14:36,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:36,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:14:36,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:14:36,860 INFO L87 Difference]: Start difference. First operand 109 states and 224 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:37,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:37,049 INFO L93 Difference]: Finished difference Result 128 states and 256 transitions. [2021-07-13 19:14:37,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:14:37,049 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:14:37,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:37,049 INFO L225 Difference]: With dead ends: 128 [2021-07-13 19:14:37,049 INFO L226 Difference]: Without dead ends: 121 [2021-07-13 19:14:37,049 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 312.3ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:14:37,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-07-13 19:14:37,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 112. [2021-07-13 19:14:37,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.09009009009009) internal successors, (232), 111 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:37,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 232 transitions. [2021-07-13 19:14:37,051 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 232 transitions. Word has length 19 [2021-07-13 19:14:37,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:37,051 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 232 transitions. [2021-07-13 19:14:37,051 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:37,051 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 232 transitions. [2021-07-13 19:14:37,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:14:37,051 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:37,052 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:37,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:37,273 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:37,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:37,273 INFO L82 PathProgramCache]: Analyzing trace with hash 375547334, now seen corresponding path program 166 times [2021-07-13 19:14:37,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:37,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385808214] [2021-07-13 19:14:37,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:37,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:37,369 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:37,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:37,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385808214] [2021-07-13 19:14:37,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385808214] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:37,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507378924] [2021-07-13 19:14:37,370 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:37,390 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:14:37,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:37,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:14:37,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:37,615 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:37,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507378924] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:37,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:37,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:14:37,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081164143] [2021-07-13 19:14:37,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:14:37,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:37,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:14:37,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:14:37,617 INFO L87 Difference]: Start difference. First operand 112 states and 232 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:37,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:37,846 INFO L93 Difference]: Finished difference Result 151 states and 297 transitions. [2021-07-13 19:14:37,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:14:37,847 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:14:37,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:37,847 INFO L225 Difference]: With dead ends: 151 [2021-07-13 19:14:37,847 INFO L226 Difference]: Without dead ends: 144 [2021-07-13 19:14:37,847 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 312.6ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:14:37,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-07-13 19:14:37,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 113. [2021-07-13 19:14:37,848 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) [2021-07-13 19:14:37,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 236 transitions. [2021-07-13 19:14:37,849 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 236 transitions. Word has length 19 [2021-07-13 19:14:37,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:37,849 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 236 transitions. [2021-07-13 19:14:37,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:37,849 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 236 transitions. [2021-07-13 19:14:37,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:14:37,849 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:37,849 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:38,049 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:38,050 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:38,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:38,050 INFO L82 PathProgramCache]: Analyzing trace with hash 391008130, now seen corresponding path program 167 times [2021-07-13 19:14:38,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:38,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809359947] [2021-07-13 19:14:38,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:38,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:38,140 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:38,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:38,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809359947] [2021-07-13 19:14:38,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809359947] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:38,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856946000] [2021-07-13 19:14:38,140 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 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 [2021-07-13 19:14:38,161 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:14:38,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:38,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:14:38,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:38,366 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:38,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856946000] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:38,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:38,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:14:38,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785911443] [2021-07-13 19:14:38,367 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:14:38,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:38,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:14:38,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:14:38,367 INFO L87 Difference]: Start difference. First operand 113 states and 236 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:38,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:38,617 INFO L93 Difference]: Finished difference Result 138 states and 279 transitions. [2021-07-13 19:14:38,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:14:38,617 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:14:38,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:38,617 INFO L225 Difference]: With dead ends: 138 [2021-07-13 19:14:38,617 INFO L226 Difference]: Without dead ends: 131 [2021-07-13 19:14:38,618 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 305.2ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:14:38,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-07-13 19:14:38,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 111. [2021-07-13 19:14:38,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.081818181818182) internal successors, (229), 110 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:38,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 229 transitions. [2021-07-13 19:14:38,619 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 229 transitions. Word has length 19 [2021-07-13 19:14:38,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:38,619 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 229 transitions. [2021-07-13 19:14:38,619 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:38,619 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 229 transitions. [2021-07-13 19:14:38,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:14:38,619 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:38,619 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:38,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,176 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:38,820 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:38,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:38,820 INFO L82 PathProgramCache]: Analyzing trace with hash -1773249202, now seen corresponding path program 168 times [2021-07-13 19:14:38,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:38,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724693500] [2021-07-13 19:14:38,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:38,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:38,913 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:38,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:38,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724693500] [2021-07-13 19:14:38,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724693500] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:38,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969551121] [2021-07-13 19:14:38,913 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:14:38,935 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:14:38,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:38,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:14:38,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:39,142 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:39,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969551121] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:39,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:39,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:14:39,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924403998] [2021-07-13 19:14:39,143 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:14:39,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:39,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:14:39,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:14:39,143 INFO L87 Difference]: Start difference. First operand 111 states and 229 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:39,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:39,432 INFO L93 Difference]: Finished difference Result 152 states and 301 transitions. [2021-07-13 19:14:39,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:14:39,433 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:14:39,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:39,433 INFO L225 Difference]: With dead ends: 152 [2021-07-13 19:14:39,433 INFO L226 Difference]: Without dead ends: 145 [2021-07-13 19:14:39,433 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 368.6ms TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:14:39,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-07-13 19:14:39,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 113. [2021-07-13 19:14:39,434 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) [2021-07-13 19:14:39,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 236 transitions. [2021-07-13 19:14:39,435 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 236 transitions. Word has length 19 [2021-07-13 19:14:39,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:39,435 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 236 transitions. [2021-07-13 19:14:39,435 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:39,435 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 236 transitions. [2021-07-13 19:14:39,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:14:39,435 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:39,435 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:39,635 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:39,636 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:39,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:39,636 INFO L82 PathProgramCache]: Analyzing trace with hash -1757788406, now seen corresponding path program 169 times [2021-07-13 19:14:39,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:39,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503093290] [2021-07-13 19:14:39,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:39,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:39,731 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:39,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:39,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503093290] [2021-07-13 19:14:39,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503093290] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:39,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775764309] [2021-07-13 19:14:39,731 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:39,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:39,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:14:39,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:39,953 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:39,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775764309] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:39,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:39,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:14:39,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838267214] [2021-07-13 19:14:39,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:14:39,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:39,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:14:39,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:14:39,954 INFO L87 Difference]: Start difference. First operand 113 states and 236 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:40,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:40,281 INFO L93 Difference]: Finished difference Result 158 states and 312 transitions. [2021-07-13 19:14:40,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:14:40,281 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:14:40,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:40,282 INFO L225 Difference]: With dead ends: 158 [2021-07-13 19:14:40,282 INFO L226 Difference]: Without dead ends: 151 [2021-07-13 19:14:40,282 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 351.5ms TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:14:40,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-07-13 19:14:40,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 112. [2021-07-13 19:14:40,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.09009009009009) internal successors, (232), 111 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:40,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 232 transitions. [2021-07-13 19:14:40,284 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 232 transitions. Word has length 19 [2021-07-13 19:14:40,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:40,284 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 232 transitions. [2021-07-13 19:14:40,284 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:40,284 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 232 transitions. [2021-07-13 19:14:40,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:14:40,284 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:40,284 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:40,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-07-13 19:14:40,485 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:40,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:40,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1186333600, now seen corresponding path program 170 times [2021-07-13 19:14:40,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:40,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958467795] [2021-07-13 19:14:40,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:40,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:40,569 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:40,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:40,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958467795] [2021-07-13 19:14:40,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958467795] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:40,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082273] [2021-07-13 19:14:40,569 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 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 [2021-07-13 19:14:40,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:14:40,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:40,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:14:40,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:40,799 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:40,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082273] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:40,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:40,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:14:40,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517889500] [2021-07-13 19:14:40,799 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:14:40,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:40,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:14:40,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:14:40,800 INFO L87 Difference]: Start difference. First operand 112 states and 232 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:41,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:41,010 INFO L93 Difference]: Finished difference Result 132 states and 265 transitions. [2021-07-13 19:14:41,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:14:41,010 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:14:41,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:41,010 INFO L225 Difference]: With dead ends: 132 [2021-07-13 19:14:41,011 INFO L226 Difference]: Without dead ends: 125 [2021-07-13 19:14:41,011 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 293.6ms TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:14:41,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-07-13 19:14:41,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 110. [2021-07-13 19:14:41,012 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) [2021-07-13 19:14:41,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 227 transitions. [2021-07-13 19:14:41,012 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 227 transitions. Word has length 19 [2021-07-13 19:14:41,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:41,012 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 227 transitions. [2021-07-13 19:14:41,012 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:41,012 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 227 transitions. [2021-07-13 19:14:41,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:14:41,012 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:41,012 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:41,213 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-07-13 19:14:41,213 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:41,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:41,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1427626506, now seen corresponding path program 171 times [2021-07-13 19:14:41,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:41,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562259885] [2021-07-13 19:14:41,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:41,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:41,307 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:41,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:41,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562259885] [2021-07-13 19:14:41,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562259885] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:41,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651663120] [2021-07-13 19:14:41,307 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:41,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:14:41,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:41,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:14:41,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:41,540 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:41,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651663120] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:41,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:41,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:14:41,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034920483] [2021-07-13 19:14:41,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:14:41,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:41,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:14:41,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:14:41,541 INFO L87 Difference]: Start difference. First operand 110 states and 227 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:41,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:41,883 INFO L93 Difference]: Finished difference Result 173 states and 341 transitions. [2021-07-13 19:14:41,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:14:41,883 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:14:41,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:41,884 INFO L225 Difference]: With dead ends: 173 [2021-07-13 19:14:41,884 INFO L226 Difference]: Without dead ends: 166 [2021-07-13 19:14:41,884 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 361.8ms TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:14:41,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-07-13 19:14:41,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 113. [2021-07-13 19:14:41,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.125) internal successors, (238), 112 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) [2021-07-13 19:14:41,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 238 transitions. [2021-07-13 19:14:41,885 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 238 transitions. Word has length 19 [2021-07-13 19:14:41,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:41,885 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 238 transitions. [2021-07-13 19:14:41,885 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:41,885 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 238 transitions. [2021-07-13 19:14:41,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:14:41,886 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:41,886 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:42,086 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-07-13 19:14:42,086 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:42,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:42,086 INFO L82 PathProgramCache]: Analyzing trace with hash 1443087302, now seen corresponding path program 172 times [2021-07-13 19:14:42,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:42,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577098191] [2021-07-13 19:14:42,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:42,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:42,174 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:42,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:42,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577098191] [2021-07-13 19:14:42,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577098191] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:42,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505728143] [2021-07-13 19:14:42,175 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 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 [2021-07-13 19:14:42,195 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:14:42,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:42,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:14:42,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:42,398 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:42,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505728143] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:42,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:42,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:14:42,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743148751] [2021-07-13 19:14:42,398 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:14:42,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:42,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:14:42,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:14:42,399 INFO L87 Difference]: Start difference. First operand 113 states and 238 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:42,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:42,732 INFO L93 Difference]: Finished difference Result 179 states and 352 transitions. [2021-07-13 19:14:42,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:14:42,732 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:14:42,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:42,733 INFO L225 Difference]: With dead ends: 179 [2021-07-13 19:14:42,733 INFO L226 Difference]: Without dead ends: 172 [2021-07-13 19:14:42,733 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 333.6ms TimeCoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:14:42,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-07-13 19:14:42,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 112. [2021-07-13 19:14:42,734 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) [2021-07-13 19:14:42,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 234 transitions. [2021-07-13 19:14:42,734 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 234 transitions. Word has length 19 [2021-07-13 19:14:42,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:42,734 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 234 transitions. [2021-07-13 19:14:42,734 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:42,734 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 234 transitions. [2021-07-13 19:14:42,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:14:42,735 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:42,735 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:42,935 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:42,935 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:42,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:42,935 INFO L82 PathProgramCache]: Analyzing trace with hash 2014542108, now seen corresponding path program 173 times [2021-07-13 19:14:42,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:42,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193340297] [2021-07-13 19:14:42,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:42,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:43,027 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:43,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:43,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193340297] [2021-07-13 19:14:43,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193340297] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:43,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768015789] [2021-07-13 19:14:43,027 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:43,048 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:14:43,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:43,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:14:43,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:43,288 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:43,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768015789] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:43,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:43,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:14:43,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541225249] [2021-07-13 19:14:43,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:14:43,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:43,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:14:43,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:14:43,289 INFO L87 Difference]: Start difference. First operand 112 states and 234 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:43,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:43,546 INFO L93 Difference]: Finished difference Result 156 states and 310 transitions. [2021-07-13 19:14:43,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:14:43,546 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:14:43,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:43,547 INFO L225 Difference]: With dead ends: 156 [2021-07-13 19:14:43,547 INFO L226 Difference]: Without dead ends: 149 [2021-07-13 19:14:43,547 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 317.5ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:14:43,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-07-13 19:14:43,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 111. [2021-07-13 19:14:43,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.1) internal successors, (231), 110 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:43,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 231 transitions. [2021-07-13 19:14:43,548 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 231 transitions. Word has length 19 [2021-07-13 19:14:43,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:43,548 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 231 transitions. [2021-07-13 19:14:43,548 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:43,548 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 231 transitions. [2021-07-13 19:14:43,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:14:43,549 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:43,549 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:43,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:43,749 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:43,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:43,750 INFO L82 PathProgramCache]: Analyzing trace with hash 1476686530, now seen corresponding path program 174 times [2021-07-13 19:14:43,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:43,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018238143] [2021-07-13 19:14:43,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:43,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:43,832 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:43,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:43,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018238143] [2021-07-13 19:14:43,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018238143] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:43,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110552903] [2021-07-13 19:14:43,832 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:43,853 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:14:43,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:43,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:14:43,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:44,071 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:44,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110552903] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:44,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:44,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:14:44,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969963972] [2021-07-13 19:14:44,072 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:14:44,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:44,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:14:44,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:14:44,072 INFO L87 Difference]: Start difference. First operand 111 states and 231 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:44,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:44,268 INFO L93 Difference]: Finished difference Result 150 states and 298 transitions. [2021-07-13 19:14:44,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:14:44,268 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:14:44,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:44,268 INFO L225 Difference]: With dead ends: 150 [2021-07-13 19:14:44,268 INFO L226 Difference]: Without dead ends: 143 [2021-07-13 19:14:44,269 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 285.0ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:14:44,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-07-13 19:14:44,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 107. [2021-07-13 19:14:44,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0660377358490565) internal successors, (219), 106 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) [2021-07-13 19:14:44,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 219 transitions. [2021-07-13 19:14:44,270 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 219 transitions. Word has length 19 [2021-07-13 19:14:44,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:44,270 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 219 transitions. [2021-07-13 19:14:44,270 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:44,270 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 219 transitions. [2021-07-13 19:14:44,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:14:44,270 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:44,270 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:44,471 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2021-07-13 19:14:44,471 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:44,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:44,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1981542510, now seen corresponding path program 175 times [2021-07-13 19:14:44,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:44,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974551245] [2021-07-13 19:14:44,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:44,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:44,558 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:44,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:44,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974551245] [2021-07-13 19:14:44,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974551245] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:44,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613971594] [2021-07-13 19:14:44,558 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 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 [2021-07-13 19:14:44,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:44,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:14:44,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:44,783 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:44,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613971594] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:44,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:44,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:14:44,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957192153] [2021-07-13 19:14:44,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:14:44,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:44,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:14:44,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:14:44,783 INFO L87 Difference]: Start difference. First operand 107 states and 219 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:45,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:45,062 INFO L93 Difference]: Finished difference Result 173 states and 338 transitions. [2021-07-13 19:14:45,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:14:45,063 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:14:45,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:45,063 INFO L225 Difference]: With dead ends: 173 [2021-07-13 19:14:45,063 INFO L226 Difference]: Without dead ends: 166 [2021-07-13 19:14:45,063 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 315.0ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:14:45,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-07-13 19:14:45,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 111. [2021-07-13 19:14:45,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.118181818181818) internal successors, (233), 110 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) [2021-07-13 19:14:45,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 233 transitions. [2021-07-13 19:14:45,065 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 233 transitions. Word has length 19 [2021-07-13 19:14:45,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:45,065 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 233 transitions. [2021-07-13 19:14:45,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:45,065 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 233 transitions. [2021-07-13 19:14:45,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:14:45,065 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:45,065 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:45,265 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:45,266 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:45,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:45,266 INFO L82 PathProgramCache]: Analyzing trace with hash -1966081714, now seen corresponding path program 176 times [2021-07-13 19:14:45,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:45,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910778845] [2021-07-13 19:14:45,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:45,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:45,354 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:45,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:45,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910778845] [2021-07-13 19:14:45,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910778845] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:45,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264221000] [2021-07-13 19:14:45,355 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:45,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:14:45,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:45,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:14:45,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:45,575 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:45,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264221000] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:45,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:45,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:14:45,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267715351] [2021-07-13 19:14:45,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:14:45,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:45,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:14:45,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:14:45,577 INFO L87 Difference]: Start difference. First operand 111 states and 233 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:45,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:45,857 INFO L93 Difference]: Finished difference Result 179 states and 349 transitions. [2021-07-13 19:14:45,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:14:45,858 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:14:45,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:45,858 INFO L225 Difference]: With dead ends: 179 [2021-07-13 19:14:45,858 INFO L226 Difference]: Without dead ends: 172 [2021-07-13 19:14:45,858 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 308.0ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:14:45,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-07-13 19:14:45,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 110. [2021-07-13 19:14:45,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.1009174311926606) internal successors, (229), 109 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) [2021-07-13 19:14:45,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 229 transitions. [2021-07-13 19:14:45,860 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 229 transitions. Word has length 19 [2021-07-13 19:14:45,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:45,860 INFO L482 AbstractCegarLoop]: Abstraction has 110 states and 229 transitions. [2021-07-13 19:14:45,860 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:45,860 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 229 transitions. [2021-07-13 19:14:45,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:14:45,860 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:45,860 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:46,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,185 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:46,061 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:46,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:46,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1394626908, now seen corresponding path program 177 times [2021-07-13 19:14:46,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:46,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615923169] [2021-07-13 19:14:46,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:46,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:46,144 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:46,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:46,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615923169] [2021-07-13 19:14:46,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615923169] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:46,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619161011] [2021-07-13 19:14:46,144 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:46,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:14:46,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:46,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:14:46,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:46,366 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:46,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619161011] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:46,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:46,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:14:46,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896211768] [2021-07-13 19:14:46,367 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:14:46,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:46,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:14:46,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:14:46,367 INFO L87 Difference]: Start difference. First operand 110 states and 229 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:46,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:46,600 INFO L93 Difference]: Finished difference Result 152 states and 300 transitions. [2021-07-13 19:14:46,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:14:46,601 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:14:46,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:46,601 INFO L225 Difference]: With dead ends: 152 [2021-07-13 19:14:46,601 INFO L226 Difference]: Without dead ends: 145 [2021-07-13 19:14:46,601 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 286.2ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:14:46,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-07-13 19:14:46,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 109. [2021-07-13 19:14:46,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.0925925925925926) internal successors, (226), 108 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:46,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 226 transitions. [2021-07-13 19:14:46,603 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 226 transitions. Word has length 19 [2021-07-13 19:14:46,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:46,603 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 226 transitions. [2021-07-13 19:14:46,603 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:46,603 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 226 transitions. [2021-07-13 19:14:46,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:14:46,603 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:46,603 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:46,803 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:46,804 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:46,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:46,804 INFO L82 PathProgramCache]: Analyzing trace with hash 42788626, now seen corresponding path program 178 times [2021-07-13 19:14:46,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:46,804 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189721233] [2021-07-13 19:14:46,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:46,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:46,894 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:46,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:46,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189721233] [2021-07-13 19:14:46,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189721233] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:46,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065522637] [2021-07-13 19:14:46,894 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 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 [2021-07-13 19:14:46,928 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:14:46,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:46,928 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 19:14:46,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:47,147 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:47,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065522637] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:47,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:47,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:14:47,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740390947] [2021-07-13 19:14:47,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:14:47,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:47,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:14:47,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:14:47,149 INFO L87 Difference]: Start difference. First operand 109 states and 226 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:47,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:47,449 INFO L93 Difference]: Finished difference Result 175 states and 335 transitions. [2021-07-13 19:14:47,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:14:47,450 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:14:47,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:47,450 INFO L225 Difference]: With dead ends: 175 [2021-07-13 19:14:47,450 INFO L226 Difference]: Without dead ends: 161 [2021-07-13 19:14:47,450 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 353.1ms TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:14:47,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-07-13 19:14:47,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 117. [2021-07-13 19:14:47,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.1206896551724137) internal successors, (246), 116 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:47,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 246 transitions. [2021-07-13 19:14:47,452 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 246 transitions. Word has length 19 [2021-07-13 19:14:47,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:47,452 INFO L482 AbstractCegarLoop]: Abstraction has 117 states and 246 transitions. [2021-07-13 19:14:47,452 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:47,452 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 246 transitions. [2021-07-13 19:14:47,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:14:47,452 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:47,452 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:47,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:47,653 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:47,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:47,653 INFO L82 PathProgramCache]: Analyzing trace with hash -339931762, now seen corresponding path program 179 times [2021-07-13 19:14:47,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:47,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054604106] [2021-07-13 19:14:47,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:47,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:47,733 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:47,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:47,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054604106] [2021-07-13 19:14:47,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054604106] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:47,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516435164] [2021-07-13 19:14:47,733 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:47,753 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:14:47,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:47,754 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 19:14:47,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:47,912 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:47,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516435164] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:47,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:47,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:14:47,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481702588] [2021-07-13 19:14:47,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:14:47,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:47,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:14:47,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:14:47,913 INFO L87 Difference]: Start difference. First operand 117 states and 246 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:48,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:48,269 INFO L93 Difference]: Finished difference Result 163 states and 326 transitions. [2021-07-13 19:14:48,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:14:48,270 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:14:48,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:48,270 INFO L225 Difference]: With dead ends: 163 [2021-07-13 19:14:48,270 INFO L226 Difference]: Without dead ends: 156 [2021-07-13 19:14:48,270 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 376.5ms TimeCoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:14:48,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-07-13 19:14:48,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 118. [2021-07-13 19:14:48,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.128205128205128) internal successors, (249), 117 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:48,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 249 transitions. [2021-07-13 19:14:48,272 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 249 transitions. Word has length 19 [2021-07-13 19:14:48,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:48,272 INFO L482 AbstractCegarLoop]: Abstraction has 118 states and 249 transitions. [2021-07-13 19:14:48,272 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:48,273 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 249 transitions. [2021-07-13 19:14:48,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:14:48,273 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:48,273 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:48,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:48,489 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:48,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:48,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1739362066, now seen corresponding path program 180 times [2021-07-13 19:14:48,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:48,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903085753] [2021-07-13 19:14:48,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:48,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:48,585 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:48,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:48,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903085753] [2021-07-13 19:14:48,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903085753] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:48,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47417821] [2021-07-13 19:14:48,586 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:48,611 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:14:48,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:48,612 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 19:14:48,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:48,971 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:48,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47417821] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:48,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:48,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:14:48,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532817301] [2021-07-13 19:14:48,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:14:48,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:48,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:14:48,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:14:48,972 INFO L87 Difference]: Start difference. First operand 118 states and 249 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:49,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:49,515 INFO L93 Difference]: Finished difference Result 208 states and 411 transitions. [2021-07-13 19:14:49,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:14:49,515 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:14:49,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:49,516 INFO L225 Difference]: With dead ends: 208 [2021-07-13 19:14:49,516 INFO L226 Difference]: Without dead ends: 201 [2021-07-13 19:14:49,516 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 580.7ms TimeCoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:14:49,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-07-13 19:14:49,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 119. [2021-07-13 19:14:49,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.1440677966101696) internal successors, (253), 118 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) [2021-07-13 19:14:49,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 253 transitions. [2021-07-13 19:14:49,518 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 253 transitions. Word has length 19 [2021-07-13 19:14:49,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:49,519 INFO L482 AbstractCegarLoop]: Abstraction has 119 states and 253 transitions. [2021-07-13 19:14:49,519 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:49,519 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 253 transitions. [2021-07-13 19:14:49,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:14:49,519 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:49,519 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:49,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:49,733 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:49,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:49,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1754822862, now seen corresponding path program 181 times [2021-07-13 19:14:49,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:49,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377003563] [2021-07-13 19:14:49,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:49,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:49,817 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:49,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:49,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377003563] [2021-07-13 19:14:49,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377003563] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:49,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974604388] [2021-07-13 19:14:49,818 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:14:49,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:49,838 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 19:14:49,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:50,185 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:50,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974604388] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:50,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:50,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:14:50,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665864139] [2021-07-13 19:14:50,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:14:50,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:50,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:14:50,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:14:50,185 INFO L87 Difference]: Start difference. First operand 119 states and 253 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:50,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:50,558 INFO L93 Difference]: Finished difference Result 198 states and 398 transitions. [2021-07-13 19:14:50,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:14:50,558 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:14:50,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:50,559 INFO L225 Difference]: With dead ends: 198 [2021-07-13 19:14:50,559 INFO L226 Difference]: Without dead ends: 191 [2021-07-13 19:14:50,559 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 375.0ms TimeCoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:14:50,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-07-13 19:14:50,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 117. [2021-07-13 19:14:50,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.1206896551724137) internal successors, (246), 116 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:50,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 246 transitions. [2021-07-13 19:14:50,561 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 246 transitions. Word has length 19 [2021-07-13 19:14:50,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:50,561 INFO L482 AbstractCegarLoop]: Abstraction has 117 states and 246 transitions. [2021-07-13 19:14:50,561 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:50,561 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 246 transitions. [2021-07-13 19:14:50,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:14:50,561 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:50,561 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:50,761 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-07-13 19:14:50,762 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:50,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:50,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1932482486, now seen corresponding path program 182 times [2021-07-13 19:14:50,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:50,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148987903] [2021-07-13 19:14:50,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:50,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:50,847 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:50,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:50,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148987903] [2021-07-13 19:14:50,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148987903] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:50,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891131542] [2021-07-13 19:14:50,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:14:50,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:14:50,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:50,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-13 19:14:50,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:51,082 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:51,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891131542] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:51,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:51,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:14:51,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164792552] [2021-07-13 19:14:51,083 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:14:51,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:51,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:14:51,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:14:51,083 INFO L87 Difference]: Start difference. First operand 117 states and 246 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:51,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:51,313 INFO L93 Difference]: Finished difference Result 164 states and 327 transitions. [2021-07-13 19:14:51,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:14:51,313 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:14:51,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:51,314 INFO L225 Difference]: With dead ends: 164 [2021-07-13 19:14:51,314 INFO L226 Difference]: Without dead ends: 157 [2021-07-13 19:14:51,314 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 283.2ms TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:14:51,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-07-13 19:14:51,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 116. [2021-07-13 19:14:51,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.1043478260869564) internal successors, (242), 115 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) [2021-07-13 19:14:51,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 242 transitions. [2021-07-13 19:14:51,316 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 242 transitions. Word has length 19 [2021-07-13 19:14:51,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:51,316 INFO L482 AbstractCegarLoop]: Abstraction has 116 states and 242 transitions. [2021-07-13 19:14:51,316 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:51,316 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 242 transitions. [2021-07-13 19:14:51,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:14:51,316 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:51,316 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:51,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2021-07-13 19:14:51,521 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:51,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:51,521 INFO L82 PathProgramCache]: Analyzing trace with hash 672760770, now seen corresponding path program 183 times [2021-07-13 19:14:51,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:51,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195159014] [2021-07-13 19:14:51,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:51,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:51,613 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:51,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:51,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195159014] [2021-07-13 19:14:51,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195159014] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:51,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987287484] [2021-07-13 19:14:51,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:14:51,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:14:51,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:51,640 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 19:14:51,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:51,826 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:51,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987287484] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:51,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:51,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:14:51,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769140316] [2021-07-13 19:14:51,827 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:14:51,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:51,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:14:51,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:14:51,827 INFO L87 Difference]: Start difference. First operand 116 states and 242 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:52,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:52,081 INFO L93 Difference]: Finished difference Result 135 states and 272 transitions. [2021-07-13 19:14:52,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:14:52,082 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:14:52,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:52,082 INFO L225 Difference]: With dead ends: 135 [2021-07-13 19:14:52,082 INFO L226 Difference]: Without dead ends: 128 [2021-07-13 19:14:52,082 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 333.4ms TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:14:52,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-07-13 19:14:52,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 112. [2021-07-13 19:14:52,084 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) [2021-07-13 19:14:52,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 234 transitions. [2021-07-13 19:14:52,084 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 234 transitions. Word has length 19 [2021-07-13 19:14:52,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:52,084 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 234 transitions. [2021-07-13 19:14:52,084 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:52,084 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 234 transitions. [2021-07-13 19:14:52,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:14:52,085 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:52,085 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:52,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:52,289 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:52,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:52,289 INFO L82 PathProgramCache]: Analyzing trace with hash -1542912698, now seen corresponding path program 184 times [2021-07-13 19:14:52,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:52,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420980317] [2021-07-13 19:14:52,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:52,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:52,391 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:52,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:52,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420980317] [2021-07-13 19:14:52,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420980317] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:52,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639610274] [2021-07-13 19:14:52,391 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:52,416 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:14:52,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:52,417 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 19:14:52,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:52,584 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:52,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639610274] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:52,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:52,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:14:52,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371351810] [2021-07-13 19:14:52,584 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:14:52,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:52,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:14:52,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:14:52,585 INFO L87 Difference]: Start difference. First operand 112 states and 234 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:52,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:52,986 INFO L93 Difference]: Finished difference Result 178 states and 353 transitions. [2021-07-13 19:14:52,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:14:52,986 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:14:52,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:52,987 INFO L225 Difference]: With dead ends: 178 [2021-07-13 19:14:52,987 INFO L226 Difference]: Without dead ends: 171 [2021-07-13 19:14:52,987 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 437.9ms TimeCoverageRelationStatistics Valid=138, Invalid=564, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:14:52,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-07-13 19:14:52,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 113. [2021-07-13 19:14:52,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.125) internal successors, (238), 112 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) [2021-07-13 19:14:52,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 238 transitions. [2021-07-13 19:14:52,989 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 238 transitions. Word has length 19 [2021-07-13 19:14:52,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:52,989 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 238 transitions. [2021-07-13 19:14:52,989 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:52,989 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 238 transitions. [2021-07-13 19:14:52,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:14:52,989 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:52,989 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:53,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable192 [2021-07-13 19:14:53,190 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:53,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:53,190 INFO L82 PathProgramCache]: Analyzing trace with hash -1527451902, now seen corresponding path program 185 times [2021-07-13 19:14:53,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:53,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394861078] [2021-07-13 19:14:53,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:53,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:53,277 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:53,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:53,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394861078] [2021-07-13 19:14:53,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394861078] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:53,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605707179] [2021-07-13 19:14:53,277 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:53,299 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:14:53,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:53,299 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 19:14:53,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:53,483 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:53,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605707179] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:53,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:53,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:14:53,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133948447] [2021-07-13 19:14:53,483 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:14:53,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:53,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:14:53,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:14:53,484 INFO L87 Difference]: Start difference. First operand 113 states and 238 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:53,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:53,844 INFO L93 Difference]: Finished difference Result 170 states and 343 transitions. [2021-07-13 19:14:53,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:14:53,844 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:14:53,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:53,845 INFO L225 Difference]: With dead ends: 170 [2021-07-13 19:14:53,845 INFO L226 Difference]: Without dead ends: 163 [2021-07-13 19:14:53,845 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 364.4ms TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:14:53,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-07-13 19:14:53,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 111. [2021-07-13 19:14:53,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.1) internal successors, (231), 110 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:53,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 231 transitions. [2021-07-13 19:14:53,846 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 231 transitions. Word has length 19 [2021-07-13 19:14:53,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:53,847 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 231 transitions. [2021-07-13 19:14:53,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:53,847 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 231 transitions. [2021-07-13 19:14:53,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:14:53,847 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:53,847 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:54,047 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:54,047 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:54,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:54,048 INFO L82 PathProgramCache]: Analyzing trace with hash 603258062, now seen corresponding path program 186 times [2021-07-13 19:14:54,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:54,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472763830] [2021-07-13 19:14:54,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:54,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:54,159 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:54,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:54,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472763830] [2021-07-13 19:14:54,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472763830] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:54,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926227081] [2021-07-13 19:14:54,159 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:54,188 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:14:54,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:54,189 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 19:14:54,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:54,420 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:54,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926227081] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:54,420 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:54,420 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:14:54,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556481448] [2021-07-13 19:14:54,420 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:14:54,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:54,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:14:54,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:14:54,421 INFO L87 Difference]: Start difference. First operand 111 states and 231 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:54,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:54,728 INFO L93 Difference]: Finished difference Result 170 states and 337 transitions. [2021-07-13 19:14:54,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:14:54,729 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:14:54,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:54,729 INFO L225 Difference]: With dead ends: 170 [2021-07-13 19:14:54,729 INFO L226 Difference]: Without dead ends: 163 [2021-07-13 19:14:54,729 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 401.8ms TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:14:54,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-07-13 19:14:54,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 113. [2021-07-13 19:14:54,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.125) internal successors, (238), 112 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) [2021-07-13 19:14:54,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 238 transitions. [2021-07-13 19:14:54,731 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 238 transitions. Word has length 19 [2021-07-13 19:14:54,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:54,731 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 238 transitions. [2021-07-13 19:14:54,731 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:54,731 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 238 transitions. [2021-07-13 19:14:54,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:14:54,731 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:54,731 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:54,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable194 [2021-07-13 19:14:54,932 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:54,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:54,932 INFO L82 PathProgramCache]: Analyzing trace with hash 618718858, now seen corresponding path program 187 times [2021-07-13 19:14:54,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:54,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423929963] [2021-07-13 19:14:54,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:54,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:55,028 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:55,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:55,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423929963] [2021-07-13 19:14:55,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423929963] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:55,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906469041] [2021-07-13 19:14:55,028 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:55,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:55,049 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 19:14:55,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:55,522 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:55,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906469041] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:55,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:55,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:14:55,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072342404] [2021-07-13 19:14:55,523 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:14:55,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:55,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:14:55,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:14:55,523 INFO L87 Difference]: Start difference. First operand 113 states and 238 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:55,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:55,845 INFO L93 Difference]: Finished difference Result 182 states and 358 transitions. [2021-07-13 19:14:55,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:14:55,845 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:14:55,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:55,846 INFO L225 Difference]: With dead ends: 182 [2021-07-13 19:14:55,846 INFO L226 Difference]: Without dead ends: 175 [2021-07-13 19:14:55,846 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 354.6ms TimeCoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:14:55,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-07-13 19:14:55,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 112. [2021-07-13 19:14:55,847 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) [2021-07-13 19:14:55,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 234 transitions. [2021-07-13 19:14:55,847 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 234 transitions. Word has length 19 [2021-07-13 19:14:55,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:55,847 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 234 transitions. [2021-07-13 19:14:55,848 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:55,848 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 234 transitions. [2021-07-13 19:14:55,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:14:55,848 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:55,848 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:56,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:56,048 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:56,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:56,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1190173664, now seen corresponding path program 188 times [2021-07-13 19:14:56,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:56,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953912817] [2021-07-13 19:14:56,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:56,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:56,143 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:56,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:56,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953912817] [2021-07-13 19:14:56,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953912817] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:56,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788344850] [2021-07-13 19:14:56,143 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:56,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:14:56,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:56,166 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 19:14:56,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:56,537 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:56,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788344850] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:56,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:56,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-07-13 19:14:56,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730304112] [2021-07-13 19:14:56,538 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:14:56,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:56,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:14:56,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:14:56,538 INFO L87 Difference]: Start difference. First operand 112 states and 234 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:56,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:56,874 INFO L93 Difference]: Finished difference Result 140 states and 281 transitions. [2021-07-13 19:14:56,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:14:56,874 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:14:56,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:56,875 INFO L225 Difference]: With dead ends: 140 [2021-07-13 19:14:56,875 INFO L226 Difference]: Without dead ends: 133 [2021-07-13 19:14:56,875 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 368.5ms TimeCoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:14:56,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-07-13 19:14:56,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 111. [2021-07-13 19:14:56,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.1) internal successors, (231), 110 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:56,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 231 transitions. [2021-07-13 19:14:56,876 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 231 transitions. Word has length 19 [2021-07-13 19:14:56,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:56,876 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 231 transitions. [2021-07-13 19:14:56,876 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:56,876 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 231 transitions. [2021-07-13 19:14:56,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:14:56,876 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:56,877 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:57,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable196 [2021-07-13 19:14:57,077 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:57,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:57,077 INFO L82 PathProgramCache]: Analyzing trace with hash 668199066, now seen corresponding path program 189 times [2021-07-13 19:14:57,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:57,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713323327] [2021-07-13 19:14:57,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:57,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:57,162 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:57,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:57,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713323327] [2021-07-13 19:14:57,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713323327] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:57,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761825072] [2021-07-13 19:14:57,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:57,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:14:57,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:57,183 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 19:14:57,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:57,363 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:57,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761825072] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:57,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:57,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:14:57,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359331412] [2021-07-13 19:14:57,364 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:14:57,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:57,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:14:57,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:14:57,364 INFO L87 Difference]: Start difference. First operand 111 states and 231 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:14:58,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:58,013 INFO L93 Difference]: Finished difference Result 201 states and 375 transitions. [2021-07-13 19:14:58,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:14:58,013 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:14:58,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:58,013 INFO L225 Difference]: With dead ends: 201 [2021-07-13 19:14:58,013 INFO L226 Difference]: Without dead ends: 154 [2021-07-13 19:14:58,014 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 660.6ms TimeCoverageRelationStatistics Valid=226, Invalid=1034, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 19:14:58,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-07-13 19:14:58,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 117. [2021-07-13 19:14:58,015 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) [2021-07-13 19:14:58,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 243 transitions. [2021-07-13 19:14:58,015 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 243 transitions. Word has length 19 [2021-07-13 19:14:58,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:58,015 INFO L482 AbstractCegarLoop]: Abstraction has 117 states and 243 transitions. [2021-07-13 19:14:58,015 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:14:58,015 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 243 transitions. [2021-07-13 19:14:58,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:14:58,015 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:58,015 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:58,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:58,216 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:58,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:58,216 INFO L82 PathProgramCache]: Analyzing trace with hash 285478678, now seen corresponding path program 190 times [2021-07-13 19:14:58,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:58,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132702514] [2021-07-13 19:14:58,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:58,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:58,306 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:58,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:58,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132702514] [2021-07-13 19:14:58,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132702514] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:58,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257285549] [2021-07-13 19:14:58,306 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:58,326 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:14:58,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:58,327 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 19:14:58,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:58,539 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:58,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257285549] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:58,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:58,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:14:58,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822638022] [2021-07-13 19:14:58,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:14:58,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:58,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:14:58,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:14:58,541 INFO L87 Difference]: Start difference. First operand 117 states and 243 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:14:59,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:59,041 INFO L93 Difference]: Finished difference Result 161 states and 321 transitions. [2021-07-13 19:14:59,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:14:59,041 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:14:59,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:59,042 INFO L225 Difference]: With dead ends: 161 [2021-07-13 19:14:59,042 INFO L226 Difference]: Without dead ends: 154 [2021-07-13 19:14:59,042 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 471.2ms TimeCoverageRelationStatistics Valid=141, Invalid=729, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:14:59,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-07-13 19:14:59,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 113. [2021-07-13 19:14:59,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0982142857142856) internal successors, (235), 112 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) [2021-07-13 19:14:59,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 235 transitions. [2021-07-13 19:14:59,043 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 235 transitions. Word has length 19 [2021-07-13 19:14:59,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:59,043 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 235 transitions. [2021-07-13 19:14:59,043 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:14:59,043 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 235 transitions. [2021-07-13 19:14:59,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:14:59,044 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:59,044 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:14:59,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:59,244 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:59,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:59,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1930194790, now seen corresponding path program 191 times [2021-07-13 19:14:59,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:59,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801093900] [2021-07-13 19:14:59,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:59,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:59,356 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:59,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:59,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801093900] [2021-07-13 19:14:59,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801093900] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:59,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083909699] [2021-07-13 19:14:59,356 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:59,382 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:14:59,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:59,383 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 19:14:59,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:59,649 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:59,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083909699] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:59,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:59,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:14:59,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770336530] [2021-07-13 19:14:59,650 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:14:59,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:59,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:14:59,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:14:59,651 INFO L87 Difference]: Start difference. First operand 113 states and 235 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:15:00,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:00,367 INFO L93 Difference]: Finished difference Result 220 states and 436 transitions. [2021-07-13 19:15:00,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 19:15:00,367 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:15:00,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:00,368 INFO L225 Difference]: With dead ends: 220 [2021-07-13 19:15:00,368 INFO L226 Difference]: Without dead ends: 213 [2021-07-13 19:15:00,368 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 710.6ms TimeCoverageRelationStatistics Valid=213, Invalid=1119, Unknown=0, NotChecked=0, Total=1332 [2021-07-13 19:15:00,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-07-13 19:15:00,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 114. [2021-07-13 19:15:00,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.1150442477876106) internal successors, (239), 113 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:00,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 239 transitions. [2021-07-13 19:15:00,370 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 239 transitions. Word has length 19 [2021-07-13 19:15:00,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:00,370 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 239 transitions. [2021-07-13 19:15:00,370 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:15:00,370 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 239 transitions. [2021-07-13 19:15:00,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:15:00,370 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:00,370 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:00,570 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-07-13 19:15:00,571 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:00,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:00,571 INFO L82 PathProgramCache]: Analyzing trace with hash -1914733994, now seen corresponding path program 192 times [2021-07-13 19:15:00,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:00,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492326470] [2021-07-13 19:15:00,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:00,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:00,662 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:00,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:00,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492326470] [2021-07-13 19:15:00,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492326470] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:00,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604340246] [2021-07-13 19:15:00,662 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:00,683 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:15:00,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:00,683 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 19:15:00,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:00,872 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:00,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604340246] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:00,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:00,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:15:00,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525085512] [2021-07-13 19:15:00,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:15:00,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:00,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:15:00,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:15:00,873 INFO L87 Difference]: Start difference. First operand 114 states and 239 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:15:01,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:01,581 INFO L93 Difference]: Finished difference Result 210 states and 423 transitions. [2021-07-13 19:15:01,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-13 19:15:01,582 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:15:01,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:01,582 INFO L225 Difference]: With dead ends: 210 [2021-07-13 19:15:01,582 INFO L226 Difference]: Without dead ends: 203 [2021-07-13 19:15:01,583 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 624.2ms TimeCoverageRelationStatistics Valid=213, Invalid=1193, Unknown=0, NotChecked=0, Total=1406 [2021-07-13 19:15:01,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-07-13 19:15:01,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 109. [2021-07-13 19:15:01,584 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) [2021-07-13 19:15:01,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 225 transitions. [2021-07-13 19:15:01,584 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 225 transitions. Word has length 19 [2021-07-13 19:15:01,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:01,584 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 225 transitions. [2021-07-13 19:15:01,584 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:15:01,584 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 225 transitions. [2021-07-13 19:15:01,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:15:01,584 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:01,584 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:01,785 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2021-07-13 19:15:01,785 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:01,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:01,785 INFO L82 PathProgramCache]: Analyzing trace with hash -206055594, now seen corresponding path program 193 times [2021-07-13 19:15:01,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:01,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779881326] [2021-07-13 19:15:01,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:01,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:01,868 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:01,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:01,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779881326] [2021-07-13 19:15:01,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779881326] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:01,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72332668] [2021-07-13 19:15:01,868 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:01,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:01,893 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 19:15:01,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:02,086 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:02,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72332668] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:02,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:02,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:15:02,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119515918] [2021-07-13 19:15:02,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:15:02,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:02,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:15:02,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:15:02,087 INFO L87 Difference]: Start difference. First operand 109 states and 225 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:15:02,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:02,415 INFO L93 Difference]: Finished difference Result 186 states and 351 transitions. [2021-07-13 19:15:02,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:15:02,415 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:15:02,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:02,416 INFO L225 Difference]: With dead ends: 186 [2021-07-13 19:15:02,416 INFO L226 Difference]: Without dead ends: 172 [2021-07-13 19:15:02,416 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 380.8ms TimeCoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:15:02,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-07-13 19:15:02,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 117. [2021-07-13 19:15:02,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.1120689655172415) internal successors, (245), 116 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:02,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 245 transitions. [2021-07-13 19:15:02,417 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 245 transitions. Word has length 19 [2021-07-13 19:15:02,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:02,417 INFO L482 AbstractCegarLoop]: Abstraction has 117 states and 245 transitions. [2021-07-13 19:15:02,417 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:15:02,417 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 245 transitions. [2021-07-13 19:15:02,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:15:02,418 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:02,418 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:02,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2021-07-13 19:15:02,620 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:02,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:02,621 INFO L82 PathProgramCache]: Analyzing trace with hash -588775982, now seen corresponding path program 194 times [2021-07-13 19:15:02,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:02,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001740887] [2021-07-13 19:15:02,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:02,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:02,701 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:02,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:02,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001740887] [2021-07-13 19:15:02,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001740887] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:02,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140226389] [2021-07-13 19:15:02,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:02,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:15:02,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:02,722 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 19:15:02,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:02,937 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:02,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140226389] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:02,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:02,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:15:02,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686325524] [2021-07-13 19:15:02,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:15:02,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:02,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:15:02,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:15:02,938 INFO L87 Difference]: Start difference. First operand 117 states and 245 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:15:03,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:03,372 INFO L93 Difference]: Finished difference Result 170 states and 340 transitions. [2021-07-13 19:15:03,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:15:03,373 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:15:03,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:03,373 INFO L225 Difference]: With dead ends: 170 [2021-07-13 19:15:03,373 INFO L226 Difference]: Without dead ends: 163 [2021-07-13 19:15:03,373 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 439.7ms TimeCoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:15:03,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-07-13 19:15:03,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 118. [2021-07-13 19:15:03,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.1196581196581197) internal successors, (248), 117 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) [2021-07-13 19:15:03,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 248 transitions. [2021-07-13 19:15:03,375 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 248 transitions. Word has length 19 [2021-07-13 19:15:03,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:03,375 INFO L482 AbstractCegarLoop]: Abstraction has 118 states and 248 transitions. [2021-07-13 19:15:03,375 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:15:03,375 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 248 transitions. [2021-07-13 19:15:03,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:15:03,375 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:03,375 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:03,575 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 203 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-07-13 19:15:03,576 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:03,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:03,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1490517846, now seen corresponding path program 195 times [2021-07-13 19:15:03,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:03,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270433628] [2021-07-13 19:15:03,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:03,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:03,665 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:03,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:03,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270433628] [2021-07-13 19:15:03,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270433628] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:03,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461693419] [2021-07-13 19:15:03,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:03,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:15:03,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:03,687 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 19:15:03,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:03,866 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:03,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461693419] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:03,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:03,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:15:03,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746099543] [2021-07-13 19:15:03,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:15:03,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:03,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:15:03,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:15:03,867 INFO L87 Difference]: Start difference. First operand 118 states and 248 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:15:04,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:04,430 INFO L93 Difference]: Finished difference Result 217 states and 431 transitions. [2021-07-13 19:15:04,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-13 19:15:04,431 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:15:04,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:04,431 INFO L225 Difference]: With dead ends: 217 [2021-07-13 19:15:04,431 INFO L226 Difference]: Without dead ends: 210 [2021-07-13 19:15:04,432 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 498.6ms TimeCoverageRelationStatistics Valid=148, Invalid=722, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:15:04,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-07-13 19:15:04,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 119. [2021-07-13 19:15:04,433 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) [2021-07-13 19:15:04,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 252 transitions. [2021-07-13 19:15:04,434 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 252 transitions. Word has length 19 [2021-07-13 19:15:04,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:04,434 INFO L482 AbstractCegarLoop]: Abstraction has 119 states and 252 transitions. [2021-07-13 19:15:04,434 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:15:04,434 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 252 transitions. [2021-07-13 19:15:04,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:15:04,435 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:04,435 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:04,658 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2021-07-13 19:15:04,658 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:04,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:04,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1505978642, now seen corresponding path program 196 times [2021-07-13 19:15:04,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:04,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802502768] [2021-07-13 19:15:04,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:04,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:04,745 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:04,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:04,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802502768] [2021-07-13 19:15:04,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802502768] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:04,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752288079] [2021-07-13 19:15:04,745 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:04,766 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:15:04,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:04,767 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 19:15:04,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:04,962 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:04,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752288079] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:04,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:04,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:15:04,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717861200] [2021-07-13 19:15:04,962 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:15:04,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:04,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:15:04,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:15:04,963 INFO L87 Difference]: Start difference. First operand 119 states and 252 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:15:05,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:05,366 INFO L93 Difference]: Finished difference Result 206 states and 418 transitions. [2021-07-13 19:15:05,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:15:05,366 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:15:05,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:05,367 INFO L225 Difference]: With dead ends: 206 [2021-07-13 19:15:05,367 INFO L226 Difference]: Without dead ends: 199 [2021-07-13 19:15:05,367 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 416.6ms TimeCoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:15:05,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-07-13 19:15:05,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 116. [2021-07-13 19:15:05,369 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) [2021-07-13 19:15:05,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 241 transitions. [2021-07-13 19:15:05,369 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 241 transitions. Word has length 19 [2021-07-13 19:15:05,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:05,369 INFO L482 AbstractCegarLoop]: Abstraction has 116 states and 241 transitions. [2021-07-13 19:15:05,369 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:15:05,370 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 241 transitions. [2021-07-13 19:15:05,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:15:05,370 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:05,370 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:05,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:05,585 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:05,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:05,585 INFO L82 PathProgramCache]: Analyzing trace with hash 423916550, now seen corresponding path program 197 times [2021-07-13 19:15:05,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:05,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59351856] [2021-07-13 19:15:05,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:05,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:05,676 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:05,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:05,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59351856] [2021-07-13 19:15:05,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59351856] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:05,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637421734] [2021-07-13 19:15:05,677 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:05,698 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:15:05,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:05,698 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 19:15:05,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:05,922 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:05,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637421734] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:05,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:05,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:15:05,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74416374] [2021-07-13 19:15:05,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:15:05,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:05,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:15:05,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:15:05,923 INFO L87 Difference]: Start difference. First operand 116 states and 241 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:15:06,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:06,277 INFO L93 Difference]: Finished difference Result 145 states and 290 transitions. [2021-07-13 19:15:06,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:15:06,277 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:15:06,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:06,277 INFO L225 Difference]: With dead ends: 145 [2021-07-13 19:15:06,277 INFO L226 Difference]: Without dead ends: 138 [2021-07-13 19:15:06,278 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 382.7ms TimeCoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:15:06,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-07-13 19:15:06,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 112. [2021-07-13 19:15:06,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.099099099099099) internal successors, (233), 111 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) [2021-07-13 19:15:06,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 233 transitions. [2021-07-13 19:15:06,283 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 233 transitions. Word has length 19 [2021-07-13 19:15:06,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:06,283 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 233 transitions. [2021-07-13 19:15:06,283 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:15:06,283 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 233 transitions. [2021-07-13 19:15:06,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:15:06,284 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:06,284 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:06,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2021-07-13 19:15:06,501 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:06,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:06,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1791756918, now seen corresponding path program 198 times [2021-07-13 19:15:06,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:06,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127177050] [2021-07-13 19:15:06,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:06,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:06,592 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:06,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:06,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127177050] [2021-07-13 19:15:06,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127177050] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:06,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376356179] [2021-07-13 19:15:06,592 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:06,613 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:15:06,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:06,613 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 19:15:06,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:06,808 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:06,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376356179] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:06,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:06,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:15:06,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789744640] [2021-07-13 19:15:06,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:15:06,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:06,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:15:06,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:15:06,809 INFO L87 Difference]: Start difference. First operand 112 states and 233 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:15:07,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:07,255 INFO L93 Difference]: Finished difference Result 190 states and 377 transitions. [2021-07-13 19:15:07,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:15:07,256 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:15:07,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:07,256 INFO L225 Difference]: With dead ends: 190 [2021-07-13 19:15:07,256 INFO L226 Difference]: Without dead ends: 183 [2021-07-13 19:15:07,256 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 462.8ms TimeCoverageRelationStatistics Valid=149, Invalid=663, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:15:07,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-07-13 19:15:07,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 113. [2021-07-13 19:15:07,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.1160714285714284) internal successors, (237), 112 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:07,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 237 transitions. [2021-07-13 19:15:07,258 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 237 transitions. Word has length 19 [2021-07-13 19:15:07,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:07,259 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 237 transitions. [2021-07-13 19:15:07,259 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:15:07,259 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 237 transitions. [2021-07-13 19:15:07,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:15:07,259 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:07,259 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:07,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2021-07-13 19:15:07,473 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:07,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:07,473 INFO L82 PathProgramCache]: Analyzing trace with hash -1776296122, now seen corresponding path program 199 times [2021-07-13 19:15:07,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:07,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3013773] [2021-07-13 19:15:07,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:07,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:07,562 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:07,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:07,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3013773] [2021-07-13 19:15:07,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3013773] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:07,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991453947] [2021-07-13 19:15:07,562 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:07,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:07,596 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 19:15:07,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:07,934 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:07,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991453947] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:07,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:07,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:15:07,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069009203] [2021-07-13 19:15:07,935 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:15:07,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:07,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:15:07,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:15:07,935 INFO L87 Difference]: Start difference. First operand 113 states and 237 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:15:08,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:08,318 INFO L93 Difference]: Finished difference Result 181 states and 367 transitions. [2021-07-13 19:15:08,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:15:08,318 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:15:08,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:08,319 INFO L225 Difference]: With dead ends: 181 [2021-07-13 19:15:08,319 INFO L226 Difference]: Without dead ends: 174 [2021-07-13 19:15:08,319 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 455.8ms TimeCoverageRelationStatistics Valid=139, Invalid=563, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:15:08,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-07-13 19:15:08,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 111. [2021-07-13 19:15:08,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.090909090909091) internal successors, (230), 110 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) [2021-07-13 19:15:08,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 230 transitions. [2021-07-13 19:15:08,320 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 230 transitions. Word has length 19 [2021-07-13 19:15:08,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:08,320 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 230 transitions. [2021-07-13 19:15:08,321 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:15:08,321 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 230 transitions. [2021-07-13 19:15:08,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:15:08,321 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:08,321 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:08,521 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:08,521 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:08,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:08,522 INFO L82 PathProgramCache]: Analyzing trace with hash 354413842, now seen corresponding path program 200 times [2021-07-13 19:15:08,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:08,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11675098] [2021-07-13 19:15:08,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:08,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:08,609 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:08,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:08,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11675098] [2021-07-13 19:15:08,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11675098] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:08,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260796413] [2021-07-13 19:15:08,610 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:08,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:15:08,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:08,631 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 19:15:08,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:08,826 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:08,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260796413] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:08,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:08,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:15:08,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590821348] [2021-07-13 19:15:08,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:15:08,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:08,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:15:08,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:15:08,827 INFO L87 Difference]: Start difference. First operand 111 states and 230 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:15:09,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:09,180 INFO L93 Difference]: Finished difference Result 186 states and 370 transitions. [2021-07-13 19:15:09,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:15:09,180 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:15:09,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:09,180 INFO L225 Difference]: With dead ends: 186 [2021-07-13 19:15:09,180 INFO L226 Difference]: Without dead ends: 179 [2021-07-13 19:15:09,181 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 383.0ms TimeCoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:15:09,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-07-13 19:15:09,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 113. [2021-07-13 19:15:09,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.1160714285714284) internal successors, (237), 112 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:09,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 237 transitions. [2021-07-13 19:15:09,182 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 237 transitions. Word has length 19 [2021-07-13 19:15:09,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:09,182 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 237 transitions. [2021-07-13 19:15:09,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:15:09,182 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 237 transitions. [2021-07-13 19:15:09,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:15:09,183 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:09,183 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:09,383 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable208 [2021-07-13 19:15:09,383 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:09,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:09,384 INFO L82 PathProgramCache]: Analyzing trace with hash 369874638, now seen corresponding path program 201 times [2021-07-13 19:15:09,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:09,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830819985] [2021-07-13 19:15:09,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:09,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:09,485 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:09,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:09,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830819985] [2021-07-13 19:15:09,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830819985] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:09,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905536750] [2021-07-13 19:15:09,485 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 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 [2021-07-13 19:15:09,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:15:09,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:09,507 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 19:15:09,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:09,698 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:09,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905536750] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:09,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:09,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:15:09,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544031691] [2021-07-13 19:15:09,698 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:15:09,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:09,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:15:09,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:15:09,699 INFO L87 Difference]: Start difference. First operand 113 states and 237 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:15:10,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:10,056 INFO L93 Difference]: Finished difference Result 199 states and 393 transitions. [2021-07-13 19:15:10,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:15:10,057 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:15:10,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:10,057 INFO L225 Difference]: With dead ends: 199 [2021-07-13 19:15:10,057 INFO L226 Difference]: Without dead ends: 192 [2021-07-13 19:15:10,057 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 376.4ms TimeCoverageRelationStatistics Valid=130, Invalid=520, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:15:10,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-07-13 19:15:10,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 112. [2021-07-13 19:15:10,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.099099099099099) internal successors, (233), 111 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) [2021-07-13 19:15:10,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 233 transitions. [2021-07-13 19:15:10,059 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 233 transitions. Word has length 19 [2021-07-13 19:15:10,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:10,059 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 233 transitions. [2021-07-13 19:15:10,059 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:15:10,059 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 233 transitions. [2021-07-13 19:15:10,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:15:10,059 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:10,059 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:10,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable209 [2021-07-13 19:15:10,260 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:10,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:10,260 INFO L82 PathProgramCache]: Analyzing trace with hash 941329444, now seen corresponding path program 202 times [2021-07-13 19:15:10,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:10,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957616780] [2021-07-13 19:15:10,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:10,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:10,344 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:10,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:10,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957616780] [2021-07-13 19:15:10,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957616780] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:10,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278064576] [2021-07-13 19:15:10,345 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:10,365 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:15:10,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:10,366 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 19:15:10,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:10,683 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:10,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278064576] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:10,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:10,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:15:10,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568399003] [2021-07-13 19:15:10,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:15:10,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:10,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:15:10,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:15:10,684 INFO L87 Difference]: Start difference. First operand 112 states and 233 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:15:11,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:11,052 INFO L93 Difference]: Finished difference Result 152 states and 303 transitions. [2021-07-13 19:15:11,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:15:11,052 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:15:11,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:11,053 INFO L225 Difference]: With dead ends: 152 [2021-07-13 19:15:11,053 INFO L226 Difference]: Without dead ends: 145 [2021-07-13 19:15:11,053 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 405.0ms TimeCoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:15:11,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-07-13 19:15:11,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 107. [2021-07-13 19:15:11,054 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) [2021-07-13 19:15:11,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 221 transitions. [2021-07-13 19:15:11,054 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 221 transitions. Word has length 19 [2021-07-13 19:15:11,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:11,054 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 221 transitions. [2021-07-13 19:15:11,054 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:15:11,054 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 221 transitions. [2021-07-13 19:15:11,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:15:11,054 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:11,055 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:11,255 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable210,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:11,255 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:11,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:11,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1487538330, now seen corresponding path program 203 times [2021-07-13 19:15:11,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:11,255 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707228818] [2021-07-13 19:15:11,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:11,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:11,337 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:11,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:11,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707228818] [2021-07-13 19:15:11,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707228818] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:11,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714185937] [2021-07-13 19:15:11,337 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:15:11,358 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:15:11,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:11,359 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 19:15:11,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:11,564 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:11,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714185937] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:11,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:11,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:15:11,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196989690] [2021-07-13 19:15:11,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:15:11,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:11,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:15:11,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:15:11,565 INFO L87 Difference]: Start difference. First operand 107 states and 221 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:15:11,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:11,961 INFO L93 Difference]: Finished difference Result 185 states and 345 transitions. [2021-07-13 19:15:11,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:15:11,962 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:15:11,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:11,962 INFO L225 Difference]: With dead ends: 185 [2021-07-13 19:15:11,962 INFO L226 Difference]: Without dead ends: 171 [2021-07-13 19:15:11,962 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 382.8ms TimeCoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:15:11,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-07-13 19:15:11,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 113. [2021-07-13 19:15:11,963 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) [2021-07-13 19:15:11,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 234 transitions. [2021-07-13 19:15:11,963 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 234 transitions. Word has length 19 [2021-07-13 19:15:11,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:11,964 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 234 transitions. [2021-07-13 19:15:11,964 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:15:11,964 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 234 transitions. [2021-07-13 19:15:11,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:15:11,964 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:11,964 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:12,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-07-13 19:15:12,164 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:12,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:12,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1104817942, now seen corresponding path program 204 times [2021-07-13 19:15:12,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:12,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714463765] [2021-07-13 19:15:12,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:12,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:12,248 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:12,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:12,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714463765] [2021-07-13 19:15:12,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714463765] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:12,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83556596] [2021-07-13 19:15:12,248 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:12,273 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:15:12,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:12,274 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 19:15:12,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:12,468 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:12,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83556596] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:12,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:12,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:15:12,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9193022] [2021-07-13 19:15:12,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:15:12,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:12,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:15:12,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:15:12,469 INFO L87 Difference]: Start difference. First operand 113 states and 234 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:15:12,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:12,954 INFO L93 Difference]: Finished difference Result 170 states and 336 transitions. [2021-07-13 19:15:12,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:15:12,954 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:15:12,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:12,955 INFO L225 Difference]: With dead ends: 170 [2021-07-13 19:15:12,955 INFO L226 Difference]: Without dead ends: 163 [2021-07-13 19:15:12,955 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 436.4ms TimeCoverageRelationStatistics Valid=131, Invalid=739, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:15:12,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-07-13 19:15:12,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 114. [2021-07-13 19:15:12,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.0973451327433628) internal successors, (237), 113 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:12,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 237 transitions. [2021-07-13 19:15:12,956 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 237 transitions. Word has length 19 [2021-07-13 19:15:12,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:12,956 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 237 transitions. [2021-07-13 19:15:12,956 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:15:12,956 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 237 transitions. [2021-07-13 19:15:12,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:15:12,957 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:12,957 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:13,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable212,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:13,157 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:13,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:13,158 INFO L82 PathProgramCache]: Analyzing trace with hash -1110855526, now seen corresponding path program 205 times [2021-07-13 19:15:13,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:13,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133140248] [2021-07-13 19:15:13,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:13,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:13,244 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:13,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:13,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133140248] [2021-07-13 19:15:13,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133140248] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:13,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135930615] [2021-07-13 19:15:13,244 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:13,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:13,265 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 19:15:13,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:13,535 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:13,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135930615] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:13,536 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:13,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:15:13,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075988026] [2021-07-13 19:15:13,536 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:15:13,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:13,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:15:13,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:15:13,536 INFO L87 Difference]: Start difference. First operand 114 states and 237 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:15:14,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:14,105 INFO L93 Difference]: Finished difference Result 217 states and 427 transitions. [2021-07-13 19:15:14,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:15:14,105 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:15:14,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:14,106 INFO L225 Difference]: With dead ends: 217 [2021-07-13 19:15:14,106 INFO L226 Difference]: Without dead ends: 210 [2021-07-13 19:15:14,106 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 562.2ms TimeCoverageRelationStatistics Valid=153, Invalid=777, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:15:14,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-07-13 19:15:14,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 115. [2021-07-13 19:15:14,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.1140350877192984) internal successors, (241), 114 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) [2021-07-13 19:15:14,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 241 transitions. [2021-07-13 19:15:14,108 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 241 transitions. Word has length 19 [2021-07-13 19:15:14,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:14,108 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 241 transitions. [2021-07-13 19:15:14,108 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:15:14,108 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 241 transitions. [2021-07-13 19:15:14,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:15:14,108 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:14,108 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:14,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-07-13 19:15:14,309 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:14,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:14,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1095394730, now seen corresponding path program 206 times [2021-07-13 19:15:14,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:14,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131058141] [2021-07-13 19:15:14,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:14,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:14,397 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:14,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:14,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131058141] [2021-07-13 19:15:14,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131058141] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:14,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669097153] [2021-07-13 19:15:14,397 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:14,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:15:14,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:14,418 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 19:15:14,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:14,607 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:14,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669097153] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:14,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:14,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:15:14,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160716474] [2021-07-13 19:15:14,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:15:14,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:14,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:15:14,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:15:14,608 INFO L87 Difference]: Start difference. First operand 115 states and 241 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:15:15,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:15,104 INFO L93 Difference]: Finished difference Result 206 states and 414 transitions. [2021-07-13 19:15:15,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:15:15,105 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:15:15,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:15,105 INFO L225 Difference]: With dead ends: 206 [2021-07-13 19:15:15,105 INFO L226 Difference]: Without dead ends: 199 [2021-07-13 19:15:15,105 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 425.3ms TimeCoverageRelationStatistics Valid=138, Invalid=674, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:15:15,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-07-13 19:15:15,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 112. [2021-07-13 19:15:15,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 2.0720720720720722) internal successors, (230), 111 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) [2021-07-13 19:15:15,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 230 transitions. [2021-07-13 19:15:15,107 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 230 transitions. Word has length 19 [2021-07-13 19:15:15,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:15,108 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 230 transitions. [2021-07-13 19:15:15,108 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:15:15,108 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 230 transitions. [2021-07-13 19:15:15,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:15:15,108 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:15,108 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:15,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:15,317 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:15,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:15,317 INFO L82 PathProgramCache]: Analyzing trace with hash 2117510474, now seen corresponding path program 207 times [2021-07-13 19:15:15,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:15,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215157623] [2021-07-13 19:15:15,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:15,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:15,400 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:15,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:15,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215157623] [2021-07-13 19:15:15,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215157623] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:15,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96028888] [2021-07-13 19:15:15,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:15,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:15:15,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:15,422 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 19:15:15,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:15,632 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:15,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96028888] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:15,632 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:15,632 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:15:15,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838708598] [2021-07-13 19:15:15,632 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:15:15,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:15,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:15:15,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:15:15,633 INFO L87 Difference]: Start difference. First operand 112 states and 230 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:15:15,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:15,966 INFO L93 Difference]: Finished difference Result 150 states and 297 transitions. [2021-07-13 19:15:15,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:15:15,967 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:15:15,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:15,967 INFO L225 Difference]: With dead ends: 150 [2021-07-13 19:15:15,967 INFO L226 Difference]: Without dead ends: 143 [2021-07-13 19:15:15,967 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 382.9ms TimeCoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:15:15,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-07-13 19:15:15,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 114. [2021-07-13 19:15:15,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.079646017699115) internal successors, (235), 113 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) [2021-07-13 19:15:15,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 235 transitions. [2021-07-13 19:15:15,969 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 235 transitions. Word has length 19 [2021-07-13 19:15:15,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:15,969 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 235 transitions. [2021-07-13 19:15:15,969 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:15:15,969 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 235 transitions. [2021-07-13 19:15:15,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:15:15,969 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:15,969 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:16,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2021-07-13 19:15:16,170 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:16,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:16,170 INFO L82 PathProgramCache]: Analyzing trace with hash -98162994, now seen corresponding path program 208 times [2021-07-13 19:15:16,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:16,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13191323] [2021-07-13 19:15:16,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:16,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:16,259 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:16,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:16,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13191323] [2021-07-13 19:15:16,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13191323] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:16,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809599711] [2021-07-13 19:15:16,260 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:16,280 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:15:16,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:16,281 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 19:15:16,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:16,484 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:16,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809599711] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:16,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:16,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:15:16,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030517029] [2021-07-13 19:15:16,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:15:16,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:16,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:15:16,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:15:16,485 INFO L87 Difference]: Start difference. First operand 114 states and 235 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:15:16,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:16,944 INFO L93 Difference]: Finished difference Result 195 states and 384 transitions. [2021-07-13 19:15:16,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-13 19:15:16,944 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:15:16,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:16,944 INFO L225 Difference]: With dead ends: 195 [2021-07-13 19:15:16,944 INFO L226 Difference]: Without dead ends: 188 [2021-07-13 19:15:16,945 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 496.4ms TimeCoverageRelationStatistics Valid=153, Invalid=717, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:15:16,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-07-13 19:15:16,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 115. [2021-07-13 19:15:16,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.0964912280701755) internal successors, (239), 114 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:16,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 239 transitions. [2021-07-13 19:15:16,946 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 239 transitions. Word has length 19 [2021-07-13 19:15:16,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:16,946 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 239 transitions. [2021-07-13 19:15:16,946 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:15:16,946 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 239 transitions. [2021-07-13 19:15:16,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:15:16,946 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:16,946 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:17,147 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable216 [2021-07-13 19:15:17,147 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:17,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:17,147 INFO L82 PathProgramCache]: Analyzing trace with hash -82702198, now seen corresponding path program 209 times [2021-07-13 19:15:17,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:17,147 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212797972] [2021-07-13 19:15:17,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:17,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:17,234 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:17,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:17,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212797972] [2021-07-13 19:15:17,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212797972] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:17,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079629541] [2021-07-13 19:15:17,234 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:17,256 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:15:17,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:17,257 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 19:15:17,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:17,448 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:17,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079629541] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:17,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:17,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:15:17,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710097297] [2021-07-13 19:15:17,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:15:17,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:17,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:15:17,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:15:17,449 INFO L87 Difference]: Start difference. First operand 115 states and 239 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:15:17,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:17,851 INFO L93 Difference]: Finished difference Result 186 states and 374 transitions. [2021-07-13 19:15:17,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:15:17,852 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:15:17,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:17,852 INFO L225 Difference]: With dead ends: 186 [2021-07-13 19:15:17,852 INFO L226 Difference]: Without dead ends: 179 [2021-07-13 19:15:17,852 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 412.7ms TimeCoverageRelationStatistics Valid=143, Invalid=613, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:15:17,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-07-13 19:15:17,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 113. [2021-07-13 19:15:17,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.0714285714285716) internal successors, (232), 112 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:17,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 232 transitions. [2021-07-13 19:15:17,855 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 232 transitions. Word has length 19 [2021-07-13 19:15:17,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:17,855 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 232 transitions. [2021-07-13 19:15:17,855 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:15:17,855 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 232 transitions. [2021-07-13 19:15:17,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:15:17,855 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:17,855 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:18,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable217,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:18,069 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:18,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:18,069 INFO L82 PathProgramCache]: Analyzing trace with hash 2048007766, now seen corresponding path program 210 times [2021-07-13 19:15:18,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:18,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037082260] [2021-07-13 19:15:18,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:18,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:18,156 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:18,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:18,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037082260] [2021-07-13 19:15:18,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037082260] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:18,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239590134] [2021-07-13 19:15:18,156 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:18,177 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:15:18,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:18,178 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 19:15:18,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:18,439 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:18,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239590134] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:18,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:18,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:15:18,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319997580] [2021-07-13 19:15:18,440 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:15:18,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:18,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:15:18,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:15:18,440 INFO L87 Difference]: Start difference. First operand 113 states and 232 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:15:18,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:18,954 INFO L93 Difference]: Finished difference Result 195 states and 385 transitions. [2021-07-13 19:15:18,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:15:18,954 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:15:18,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:18,955 INFO L225 Difference]: With dead ends: 195 [2021-07-13 19:15:18,955 INFO L226 Difference]: Without dead ends: 188 [2021-07-13 19:15:18,955 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 482.1ms TimeCoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:15:18,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-07-13 19:15:18,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 115. [2021-07-13 19:15:18,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.0964912280701755) internal successors, (239), 114 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:18,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 239 transitions. [2021-07-13 19:15:18,957 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 239 transitions. Word has length 19 [2021-07-13 19:15:18,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:18,957 INFO L482 AbstractCegarLoop]: Abstraction has 115 states and 239 transitions. [2021-07-13 19:15:18,957 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:15:18,957 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 239 transitions. [2021-07-13 19:15:18,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:15:18,957 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:18,957 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:19,158 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable218 [2021-07-13 19:15:19,158 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:19,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:19,158 INFO L82 PathProgramCache]: Analyzing trace with hash 2063468562, now seen corresponding path program 211 times [2021-07-13 19:15:19,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:19,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601180723] [2021-07-13 19:15:19,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:19,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:19,245 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:19,245 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:19,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601180723] [2021-07-13 19:15:19,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601180723] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:19,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836114079] [2021-07-13 19:15:19,246 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:15:19,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:19,266 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 19:15:19,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:19,583 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:19,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836114079] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:19,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:19,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:15:19,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857196375] [2021-07-13 19:15:19,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:15:19,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:19,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:15:19,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:15:19,584 INFO L87 Difference]: Start difference. First operand 115 states and 239 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:15:20,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:20,002 INFO L93 Difference]: Finished difference Result 209 states and 410 transitions. [2021-07-13 19:15:20,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:15:20,002 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:15:20,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:20,003 INFO L225 Difference]: With dead ends: 209 [2021-07-13 19:15:20,003 INFO L226 Difference]: Without dead ends: 202 [2021-07-13 19:15:20,003 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 425.1ms TimeCoverageRelationStatistics Valid=134, Invalid=568, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:15:20,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-07-13 19:15:20,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 114. [2021-07-13 19:15:20,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 2.079646017699115) internal successors, (235), 113 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) [2021-07-13 19:15:20,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 235 transitions. [2021-07-13 19:15:20,005 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 235 transitions. Word has length 19 [2021-07-13 19:15:20,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:20,006 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 235 transitions. [2021-07-13 19:15:20,006 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:15:20,006 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 235 transitions. [2021-07-13 19:15:20,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:15:20,006 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:20,006 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:20,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,220 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:20,230 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:20,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:20,230 INFO L82 PathProgramCache]: Analyzing trace with hash -1660043928, now seen corresponding path program 212 times [2021-07-13 19:15:20,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:20,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652896490] [2021-07-13 19:15:20,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:20,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:20,314 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:20,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:20,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652896490] [2021-07-13 19:15:20,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652896490] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:20,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580847755] [2021-07-13 19:15:20,315 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:20,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:15:20,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:20,336 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 19:15:20,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:20,653 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:20,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580847755] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:20,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:20,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:15:20,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479118698] [2021-07-13 19:15:20,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:15:20,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:20,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:15:20,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:15:20,653 INFO L87 Difference]: Start difference. First operand 114 states and 235 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:15:21,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:21,063 INFO L93 Difference]: Finished difference Result 162 states and 320 transitions. [2021-07-13 19:15:21,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:15:21,063 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:15:21,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:21,063 INFO L225 Difference]: With dead ends: 162 [2021-07-13 19:15:21,063 INFO L226 Difference]: Without dead ends: 155 [2021-07-13 19:15:21,064 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 431.8ms TimeCoverageRelationStatistics Valid=129, Invalid=627, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:15:21,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-07-13 19:15:21,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 111. [2021-07-13 19:15:21,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.0636363636363635) internal successors, (227), 110 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) [2021-07-13 19:15:21,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 227 transitions. [2021-07-13 19:15:21,065 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 227 transitions. Word has length 19 [2021-07-13 19:15:21,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:21,065 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 227 transitions. [2021-07-13 19:15:21,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:15:21,065 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 227 transitions. [2021-07-13 19:15:21,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:15:21,065 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:21,065 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:21,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:21,269 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:21,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:21,269 INFO L82 PathProgramCache]: Analyzing trace with hash -1291658542, now seen corresponding path program 213 times [2021-07-13 19:15:21,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:21,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530186129] [2021-07-13 19:15:21,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:21,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:21,352 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:21,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:21,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530186129] [2021-07-13 19:15:21,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530186129] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:21,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068985252] [2021-07-13 19:15:21,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:15:21,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:15:21,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:21,374 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 19:15:21,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:21,581 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:21,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068985252] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:21,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:21,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:15:21,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834655787] [2021-07-13 19:15:21,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:15:21,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:21,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:15:21,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:15:21,582 INFO L87 Difference]: Start difference. First operand 111 states and 227 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:15:21,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:21,800 INFO L93 Difference]: Finished difference Result 127 states and 250 transitions. [2021-07-13 19:15:21,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:15:21,800 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:15:21,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:21,801 INFO L225 Difference]: With dead ends: 127 [2021-07-13 19:15:21,801 INFO L226 Difference]: Without dead ends: 120 [2021-07-13 19:15:21,801 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 270.8ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:15:21,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-07-13 19:15:21,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 107. [2021-07-13 19:15:21,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0660377358490565) internal successors, (219), 106 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) [2021-07-13 19:15:21,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 219 transitions. [2021-07-13 19:15:21,803 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 219 transitions. Word has length 19 [2021-07-13 19:15:21,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:21,803 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 219 transitions. [2021-07-13 19:15:21,803 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:15:21,803 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 219 transitions. [2021-07-13 19:15:21,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:15:21,803 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:21,803 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:22,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-07-13 19:15:22,021 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:22,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:22,021 INFO L82 PathProgramCache]: Analyzing trace with hash 787635286, now seen corresponding path program 214 times [2021-07-13 19:15:22,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:22,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848991185] [2021-07-13 19:15:22,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:22,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:22,113 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:22,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:22,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848991185] [2021-07-13 19:15:22,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848991185] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:22,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752008796] [2021-07-13 19:15:22,113 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:22,134 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:15:22,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:22,134 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 19:15:22,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:22,346 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:22,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752008796] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:22,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:22,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:15:22,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620146044] [2021-07-13 19:15:22,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:15:22,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:22,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:15:22,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:15:22,351 INFO L87 Difference]: Start difference. First operand 107 states and 219 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:15:22,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:22,731 INFO L93 Difference]: Finished difference Result 162 states and 315 transitions. [2021-07-13 19:15:22,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:15:22,731 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:15:22,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:22,732 INFO L225 Difference]: With dead ends: 162 [2021-07-13 19:15:22,732 INFO L226 Difference]: Without dead ends: 155 [2021-07-13 19:15:22,732 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 421.2ms TimeCoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:15:22,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-07-13 19:15:22,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 108. [2021-07-13 19:15:22,733 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) [2021-07-13 19:15:22,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 223 transitions. [2021-07-13 19:15:22,733 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 223 transitions. Word has length 19 [2021-07-13 19:15:22,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:22,733 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 223 transitions. [2021-07-13 19:15:22,733 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:15:22,734 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 223 transitions. [2021-07-13 19:15:22,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:15:22,734 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:22,734 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:22,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable222,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:22,934 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:22,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:22,935 INFO L82 PathProgramCache]: Analyzing trace with hash 803096082, now seen corresponding path program 215 times [2021-07-13 19:15:22,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:22,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37822270] [2021-07-13 19:15:22,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:22,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:23,058 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:23,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:23,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37822270] [2021-07-13 19:15:23,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37822270] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:23,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20713841] [2021-07-13 19:15:23,059 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:23,083 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:15:23,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:23,084 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 19:15:23,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:23,279 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:23,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20713841] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:23,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:23,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:15:23,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112071162] [2021-07-13 19:15:23,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:15:23,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:23,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:15:23,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:15:23,280 INFO L87 Difference]: Start difference. First operand 108 states and 223 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:15:23,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:23,645 INFO L93 Difference]: Finished difference Result 158 states and 313 transitions. [2021-07-13 19:15:23,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:15:23,646 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:15:23,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:23,646 INFO L225 Difference]: With dead ends: 158 [2021-07-13 19:15:23,646 INFO L226 Difference]: Without dead ends: 151 [2021-07-13 19:15:23,646 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 371.6ms TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:15:23,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-07-13 19:15:23,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 106. [2021-07-13 19:15:23,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.057142857142857) internal successors, (216), 105 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) [2021-07-13 19:15:23,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 216 transitions. [2021-07-13 19:15:23,648 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 216 transitions. Word has length 19 [2021-07-13 19:15:23,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:23,648 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 216 transitions. [2021-07-13 19:15:23,648 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:15:23,648 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 216 transitions. [2021-07-13 19:15:23,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:15:23,648 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:23,648 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:23,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2021-07-13 19:15:23,849 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:23,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:23,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1361161250, now seen corresponding path program 216 times [2021-07-13 19:15:23,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:23,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819399261] [2021-07-13 19:15:23,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:23,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:23,938 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:23,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:23,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819399261] [2021-07-13 19:15:23,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819399261] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:23,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373940875] [2021-07-13 19:15:23,938 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:23,959 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:15:23,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:23,960 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 19:15:23,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:24,151 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:24,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373940875] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:24,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:24,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:15:24,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132056978] [2021-07-13 19:15:24,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:15:24,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:24,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:15:24,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:15:24,152 INFO L87 Difference]: Start difference. First operand 106 states and 216 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:15:24,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:24,482 INFO L93 Difference]: Finished difference Result 158 states and 309 transitions. [2021-07-13 19:15:24,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:15:24,482 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:15:24,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:24,482 INFO L225 Difference]: With dead ends: 158 [2021-07-13 19:15:24,482 INFO L226 Difference]: Without dead ends: 151 [2021-07-13 19:15:24,482 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 340.3ms TimeCoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:15:24,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-07-13 19:15:24,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 108. [2021-07-13 19:15:24,484 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) [2021-07-13 19:15:24,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 223 transitions. [2021-07-13 19:15:24,484 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 223 transitions. Word has length 19 [2021-07-13 19:15:24,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:24,484 INFO L482 AbstractCegarLoop]: Abstraction has 108 states and 223 transitions. [2021-07-13 19:15:24,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:15:24,484 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 223 transitions. [2021-07-13 19:15:24,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:15:24,484 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:24,484 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:24,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 225 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2021-07-13 19:15:24,685 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:24,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:24,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1345700454, now seen corresponding path program 217 times [2021-07-13 19:15:24,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:24,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085848496] [2021-07-13 19:15:24,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:24,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:24,772 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:24,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:24,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085848496] [2021-07-13 19:15:24,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085848496] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:24,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224288743] [2021-07-13 19:15:24,773 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:24,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:24,793 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 19:15:24,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:24,985 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:24,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224288743] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:24,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:24,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:15:24,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774941760] [2021-07-13 19:15:24,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:15:24,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:24,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:15:24,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:15:24,986 INFO L87 Difference]: Start difference. First operand 108 states and 223 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:15:25,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:25,297 INFO L93 Difference]: Finished difference Result 169 states and 330 transitions. [2021-07-13 19:15:25,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-13 19:15:25,298 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:15:25,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:25,298 INFO L225 Difference]: With dead ends: 169 [2021-07-13 19:15:25,298 INFO L226 Difference]: Without dead ends: 162 [2021-07-13 19:15:25,298 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 324.6ms TimeCoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:15:25,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-07-13 19:15:25,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 107. [2021-07-13 19:15:25,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.0660377358490565) internal successors, (219), 106 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) [2021-07-13 19:15:25,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 219 transitions. [2021-07-13 19:15:25,299 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 219 transitions. Word has length 19 [2021-07-13 19:15:25,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:25,300 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 219 transitions. [2021-07-13 19:15:25,300 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:15:25,300 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 219 transitions. [2021-07-13 19:15:25,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:15:25,300 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:25,300 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:25,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2021-07-13 19:15:25,500 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:25,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:25,501 INFO L82 PathProgramCache]: Analyzing trace with hash -774245648, now seen corresponding path program 218 times [2021-07-13 19:15:25,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:25,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878355089] [2021-07-13 19:15:25,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:25,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:25,583 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:25,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:25,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878355089] [2021-07-13 19:15:25,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878355089] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:25,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386454104] [2021-07-13 19:15:25,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:25,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:15:25,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:25,605 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 19:15:25,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:25,794 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:25,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386454104] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:25,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:25,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:15:25,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108032567] [2021-07-13 19:15:25,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:15:25,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:25,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:15:25,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:15:25,797 INFO L87 Difference]: Start difference. First operand 107 states and 219 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:15:26,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:26,068 INFO L93 Difference]: Finished difference Result 142 states and 281 transitions. [2021-07-13 19:15:26,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:15:26,068 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:15:26,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:26,069 INFO L225 Difference]: With dead ends: 142 [2021-07-13 19:15:26,069 INFO L226 Difference]: Without dead ends: 135 [2021-07-13 19:15:26,069 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 298.7ms TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:15:26,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-07-13 19:15:26,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 105. [2021-07-13 19:15:26,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.0576923076923075) internal successors, (214), 104 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) [2021-07-13 19:15:26,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 214 transitions. [2021-07-13 19:15:26,070 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 214 transitions. Word has length 19 [2021-07-13 19:15:26,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:26,070 INFO L482 AbstractCegarLoop]: Abstraction has 105 states and 214 transitions. [2021-07-13 19:15:26,070 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:15:26,070 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 214 transitions. [2021-07-13 19:15:26,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:15:26,070 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:26,071 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:26,271 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:26,271 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:26,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:26,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1839714458, now seen corresponding path program 219 times [2021-07-13 19:15:26,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:26,272 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143591539] [2021-07-13 19:15:26,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:26,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:26,358 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:26,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:26,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143591539] [2021-07-13 19:15:26,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143591539] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:26,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024465084] [2021-07-13 19:15:26,359 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:15:26,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:15:26,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:26,380 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 19:15:26,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:26,575 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:26,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024465084] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:26,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:26,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:15:26,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501675969] [2021-07-13 19:15:26,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:15:26,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:26,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:15:26,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:15:26,576 INFO L87 Difference]: Start difference. First operand 105 states and 214 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:15:26,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:26,919 INFO L93 Difference]: Finished difference Result 176 states and 344 transitions. [2021-07-13 19:15:26,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:15:26,919 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:15:26,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:26,919 INFO L225 Difference]: With dead ends: 176 [2021-07-13 19:15:26,919 INFO L226 Difference]: Without dead ends: 169 [2021-07-13 19:15:26,920 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 361.4ms TimeCoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:15:26,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-07-13 19:15:26,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 107. [2021-07-13 19:15:26,921 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) [2021-07-13 19:15:26,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 221 transitions. [2021-07-13 19:15:26,921 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 221 transitions. Word has length 19 [2021-07-13 19:15:26,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:26,921 INFO L482 AbstractCegarLoop]: Abstraction has 107 states and 221 transitions. [2021-07-13 19:15:26,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:15:26,921 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 221 transitions. [2021-07-13 19:15:26,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:15:26,922 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:26,922 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:27,122 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:27,122 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:27,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:27,122 INFO L82 PathProgramCache]: Analyzing trace with hash 1855175254, now seen corresponding path program 220 times [2021-07-13 19:15:27,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:27,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981820472] [2021-07-13 19:15:27,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:27,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:27,214 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:27,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:27,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981820472] [2021-07-13 19:15:27,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981820472] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:27,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145892204] [2021-07-13 19:15:27,214 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:27,234 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:15:27,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:27,235 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 19:15:27,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:27,425 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:27,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145892204] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:27,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:27,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:15:27,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163165264] [2021-07-13 19:15:27,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:15:27,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:27,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:15:27,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:15:27,426 INFO L87 Difference]: Start difference. First operand 107 states and 221 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:15:27,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:27,892 INFO L93 Difference]: Finished difference Result 188 states and 367 transitions. [2021-07-13 19:15:27,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:15:27,892 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:15:27,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:27,892 INFO L225 Difference]: With dead ends: 188 [2021-07-13 19:15:27,892 INFO L226 Difference]: Without dead ends: 181 [2021-07-13 19:15:27,893 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 375.9ms TimeCoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:15:27,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-07-13 19:15:27,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 106. [2021-07-13 19:15:27,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.066666666666667) internal successors, (217), 105 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:27,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 217 transitions. [2021-07-13 19:15:27,894 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 217 transitions. Word has length 19 [2021-07-13 19:15:27,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:27,894 INFO L482 AbstractCegarLoop]: Abstraction has 106 states and 217 transitions. [2021-07-13 19:15:27,894 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:15:27,894 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 217 transitions. [2021-07-13 19:15:27,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:15:27,895 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:27,895 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:28,095 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2021-07-13 19:15:28,095 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:28,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:28,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1868337236, now seen corresponding path program 221 times [2021-07-13 19:15:28,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:28,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793269890] [2021-07-13 19:15:28,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:28,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:28,178 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:28,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:28,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793269890] [2021-07-13 19:15:28,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793269890] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:28,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915686615] [2021-07-13 19:15:28,179 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:28,199 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:15:28,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:28,199 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 19:15:28,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:28,393 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:28,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915686615] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:28,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:28,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:15:28,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980935541] [2021-07-13 19:15:28,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:15:28,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:28,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:15:28,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:15:28,394 INFO L87 Difference]: Start difference. First operand 106 states and 217 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:15:28,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:28,792 INFO L93 Difference]: Finished difference Result 160 states and 314 transitions. [2021-07-13 19:15:28,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:15:28,793 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:15:28,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:28,793 INFO L225 Difference]: With dead ends: 160 [2021-07-13 19:15:28,793 INFO L226 Difference]: Without dead ends: 153 [2021-07-13 19:15:28,793 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 390.5ms TimeCoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:15:28,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-07-13 19:15:28,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 105. [2021-07-13 19:15:28,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.0576923076923075) internal successors, (214), 104 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) [2021-07-13 19:15:28,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 214 transitions. [2021-07-13 19:15:28,795 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 214 transitions. Word has length 19 [2021-07-13 19:15:28,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:28,795 INFO L482 AbstractCegarLoop]: Abstraction has 105 states and 214 transitions. [2021-07-13 19:15:28,795 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:15:28,795 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 214 transitions. [2021-07-13 19:15:28,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:15:28,795 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:28,795 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:28,995 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,230 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:28,996 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:28,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:28,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1265651738, now seen corresponding path program 5 times [2021-07-13 19:15:28,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:28,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278347268] [2021-07-13 19:15:28,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:28,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:29,096 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:29,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:29,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278347268] [2021-07-13 19:15:29,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278347268] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:29,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147363260] [2021-07-13 19:15:29,097 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:15:29,123 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:15:29,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:29,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-13 19:15:29,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:29,225 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:29,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147363260] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:29,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:29,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-13 19:15:29,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690142649] [2021-07-13 19:15:29,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:15:29,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:29,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:15:29,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:15:29,226 INFO L87 Difference]: Start difference. First operand 105 states and 214 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 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) [2021-07-13 19:15:29,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:29,445 INFO L93 Difference]: Finished difference Result 147 states and 293 transitions. [2021-07-13 19:15:29,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:15:29,445 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 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 19 [2021-07-13 19:15:29,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:29,445 INFO L225 Difference]: With dead ends: 147 [2021-07-13 19:15:29,445 INFO L226 Difference]: Without dead ends: 136 [2021-07-13 19:15:29,445 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 295.3ms TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:15:29,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-07-13 19:15:29,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 109. [2021-07-13 19:15:29,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.074074074074074) internal successors, (224), 108 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:29,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 224 transitions. [2021-07-13 19:15:29,447 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 224 transitions. Word has length 19 [2021-07-13 19:15:29,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:29,447 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 224 transitions. [2021-07-13 19:15:29,447 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 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) [2021-07-13 19:15:29,447 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 224 transitions. [2021-07-13 19:15:29,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-07-13 19:15:29,447 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:29,447 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:29,647 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable230 [2021-07-13 19:15:29,648 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:29,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:29,648 INFO L82 PathProgramCache]: Analyzing trace with hash 1888774482, now seen corresponding path program 222 times [2021-07-13 19:15:29,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:29,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794598481] [2021-07-13 19:15:29,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:29,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:29,731 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:29,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:29,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794598481] [2021-07-13 19:15:29,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794598481] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:29,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215346630] [2021-07-13 19:15:29,731 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2021-07-13 19:15:29,752 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:15:29,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:29,752 WARN L261 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-13 19:15:29,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:29,939 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:29,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215346630] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:29,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:29,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-07-13 19:15:29,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754425224] [2021-07-13 19:15:29,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:15:29,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:29,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:15:29,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:15:29,940 INFO L87 Difference]: Start difference. First operand 109 states and 224 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:15:30,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:30,369 INFO L93 Difference]: Finished difference Result 172 states and 333 transitions. [2021-07-13 19:15:30,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-13 19:15:30,370 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-07-13 19:15:30,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:30,370 INFO L225 Difference]: With dead ends: 172 [2021-07-13 19:15:30,370 INFO L226 Difference]: Without dead ends: 158 [2021-07-13 19:15:30,370 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 418.4ms TimeCoverageRelationStatistics Valid=143, Invalid=787, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:15:30,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-07-13 19:15:30,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 109. [2021-07-13 19:15:30,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.074074074074074) internal successors, (224), 108 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:30,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 224 transitions. [2021-07-13 19:15:30,371 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 224 transitions. Word has length 19 [2021-07-13 19:15:30,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:30,371 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 224 transitions. [2021-07-13 19:15:30,372 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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) [2021-07-13 19:15:30,372 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 224 transitions. [2021-07-13 19:15:30,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:15:30,372 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:30,372 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:30,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:30,572 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:30,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:30,573 INFO L82 PathProgramCache]: Analyzing trace with hash -26764772, now seen corresponding path program 5 times [2021-07-13 19:15:30,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:30,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832336926] [2021-07-13 19:15:30,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:30,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:30,676 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:30,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:30,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832336926] [2021-07-13 19:15:30,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832336926] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:30,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282688894] [2021-07-13 19:15:30,676 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:15:30,698 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-13 19:15:30,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:30,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:15:30,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:30,809 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:30,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282688894] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:30,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:30,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-07-13 19:15:30,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007116465] [2021-07-13 19:15:30,809 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:15:30,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:30,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:15:30,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:15:30,810 INFO L87 Difference]: Start difference. First operand 109 states and 224 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:31,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:31,092 INFO L93 Difference]: Finished difference Result 146 states and 293 transitions. [2021-07-13 19:15:31,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:15:31,092 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:15:31,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:31,092 INFO L225 Difference]: With dead ends: 146 [2021-07-13 19:15:31,092 INFO L226 Difference]: Without dead ends: 133 [2021-07-13 19:15:31,092 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 340.3ms TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:15:31,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-07-13 19:15:31,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 111. [2021-07-13 19:15:31,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.081818181818182) internal successors, (229), 110 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:31,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 229 transitions. [2021-07-13 19:15:31,094 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 229 transitions. Word has length 21 [2021-07-13 19:15:31,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:31,094 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 229 transitions. [2021-07-13 19:15:31,094 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:31,094 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 229 transitions. [2021-07-13 19:15:31,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:15:31,094 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:31,094 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:31,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2021-07-13 19:15:31,313 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:31,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:31,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1997566364, now seen corresponding path program 223 times [2021-07-13 19:15:31,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:31,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983039449] [2021-07-13 19:15:31,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:31,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:31,420 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:31,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:31,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983039449] [2021-07-13 19:15:31,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983039449] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:31,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746848969] [2021-07-13 19:15:31,420 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2021-07-13 19:15:31,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:31,443 WARN L261 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:15:31,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:32,660 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:32,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746848969] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:32,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:32,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 19:15:32,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796207959] [2021-07-13 19:15:32,660 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:15:32,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:32,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:15:32,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:15:32,661 INFO L87 Difference]: Start difference. First operand 111 states and 229 transitions. Second operand has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:33,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:33,097 INFO L93 Difference]: Finished difference Result 154 states and 304 transitions. [2021-07-13 19:15:33,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:15:33,097 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:15:33,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:33,098 INFO L225 Difference]: With dead ends: 154 [2021-07-13 19:15:33,098 INFO L226 Difference]: Without dead ends: 147 [2021-07-13 19:15:33,098 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 458.4ms TimeCoverageRelationStatistics Valid=118, Invalid=752, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:15:33,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-07-13 19:15:33,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 111. [2021-07-13 19:15:33,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.081818181818182) internal successors, (229), 110 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:33,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 229 transitions. [2021-07-13 19:15:33,099 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 229 transitions. Word has length 21 [2021-07-13 19:15:33,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:33,099 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 229 transitions. [2021-07-13 19:15:33,099 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:33,100 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 229 transitions. [2021-07-13 19:15:33,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:15:33,100 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:33,100 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:33,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 234 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2021-07-13 19:15:33,300 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:33,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:33,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1614845976, now seen corresponding path program 224 times [2021-07-13 19:15:33,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:33,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720977368] [2021-07-13 19:15:33,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:33,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:33,412 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:33,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:33,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720977368] [2021-07-13 19:15:33,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720977368] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:33,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093934765] [2021-07-13 19:15:33,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:15:33,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:15:33,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:33,437 WARN L261 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:15:33,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:33,651 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:33,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093934765] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:33,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:33,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 19:15:33,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907609405] [2021-07-13 19:15:33,652 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:15:33,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:33,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:15:33,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:15:33,652 INFO L87 Difference]: Start difference. First operand 111 states and 229 transitions. Second operand has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:34,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:34,032 INFO L93 Difference]: Finished difference Result 159 states and 314 transitions. [2021-07-13 19:15:34,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:15:34,032 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:15:34,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:34,033 INFO L225 Difference]: With dead ends: 159 [2021-07-13 19:15:34,033 INFO L226 Difference]: Without dead ends: 152 [2021-07-13 19:15:34,033 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 441.3ms TimeCoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:15:34,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-07-13 19:15:34,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 113. [2021-07-13 19:15:34,034 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) [2021-07-13 19:15:34,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 234 transitions. [2021-07-13 19:15:34,034 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 234 transitions. Word has length 21 [2021-07-13 19:15:34,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:34,034 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 234 transitions. [2021-07-13 19:15:34,035 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:34,035 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 234 transitions. [2021-07-13 19:15:34,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:15:34,035 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:34,035 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:34,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2021-07-13 19:15:34,235 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:34,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:34,236 INFO L82 PathProgramCache]: Analyzing trace with hash -600827492, now seen corresponding path program 225 times [2021-07-13 19:15:34,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:34,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357079768] [2021-07-13 19:15:34,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:34,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:34,353 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:34,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:34,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357079768] [2021-07-13 19:15:34,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357079768] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:34,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249649011] [2021-07-13 19:15:34,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-07-13 19:15:34,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:15:34,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:34,376 WARN L261 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:15:34,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:34,587 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:34,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249649011] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:34,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:34,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 19:15:34,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971920623] [2021-07-13 19:15:34,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:15:34,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:34,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:15:34,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:15:34,588 INFO L87 Difference]: Start difference. First operand 113 states and 234 transitions. Second operand has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:35,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:35,032 INFO L93 Difference]: Finished difference Result 185 states and 362 transitions. [2021-07-13 19:15:35,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:15:35,033 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:15:35,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:35,033 INFO L225 Difference]: With dead ends: 185 [2021-07-13 19:15:35,033 INFO L226 Difference]: Without dead ends: 178 [2021-07-13 19:15:35,033 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 457.7ms TimeCoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:15:35,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-07-13 19:15:35,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 114. [2021-07-13 19:15:35,035 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) [2021-07-13 19:15:35,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 238 transitions. [2021-07-13 19:15:35,035 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 238 transitions. Word has length 21 [2021-07-13 19:15:35,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:35,035 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 238 transitions. [2021-07-13 19:15:35,035 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:35,035 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 238 transitions. [2021-07-13 19:15:35,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:15:35,035 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:35,035 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:35,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 236 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-07-13 19:15:35,236 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:35,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:35,236 INFO L82 PathProgramCache]: Analyzing trace with hash -585366696, now seen corresponding path program 226 times [2021-07-13 19:15:35,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:35,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066719969] [2021-07-13 19:15:35,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:35,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:35,349 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:35,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:35,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066719969] [2021-07-13 19:15:35,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066719969] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:35,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472218560] [2021-07-13 19:15:35,350 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2021-07-13 19:15:35,371 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:15:35,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:35,372 WARN L261 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:15:35,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:35,748 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:35,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472218560] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:35,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:35,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 19:15:35,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420944534] [2021-07-13 19:15:35,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:15:35,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:35,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:15:35,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:15:35,749 INFO L87 Difference]: Start difference. First operand 114 states and 238 transitions. Second operand has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:36,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:36,225 INFO L93 Difference]: Finished difference Result 168 states and 336 transitions. [2021-07-13 19:15:36,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:15:36,225 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:15:36,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:36,225 INFO L225 Difference]: With dead ends: 168 [2021-07-13 19:15:36,225 INFO L226 Difference]: Without dead ends: 161 [2021-07-13 19:15:36,226 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 544.7ms TimeCoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:15:36,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-07-13 19:15:36,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 112. [2021-07-13 19:15:36,227 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) [2021-07-13 19:15:36,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 231 transitions. [2021-07-13 19:15:36,227 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 231 transitions. Word has length 21 [2021-07-13 19:15:36,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:36,227 INFO L482 AbstractCegarLoop]: Abstraction has 112 states and 231 transitions. [2021-07-13 19:15:36,227 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:36,228 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 231 transitions. [2021-07-13 19:15:36,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:15:36,228 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:36,228 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:36,451 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2021-07-13 19:15:36,452 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:36,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:36,452 INFO L82 PathProgramCache]: Analyzing trace with hash -1736931496, now seen corresponding path program 227 times [2021-07-13 19:15:36,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:36,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129980554] [2021-07-13 19:15:36,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:36,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:36,560 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:36,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:36,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129980554] [2021-07-13 19:15:36,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129980554] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:36,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314860444] [2021-07-13 19:15:36,560 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2021-07-13 19:15:36,582 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-13 19:15:36,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:36,583 WARN L261 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:15:36,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:37,825 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:37,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314860444] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:37,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:37,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 19:15:37,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237532696] [2021-07-13 19:15:37,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:15:37,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:37,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:15:37,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:15:37,826 INFO L87 Difference]: Start difference. First operand 112 states and 231 transitions. Second operand has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:38,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:38,326 INFO L93 Difference]: Finished difference Result 176 states and 347 transitions. [2021-07-13 19:15:38,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:15:38,327 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:15:38,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:38,327 INFO L225 Difference]: With dead ends: 176 [2021-07-13 19:15:38,327 INFO L226 Difference]: Without dead ends: 169 [2021-07-13 19:15:38,327 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 473.6ms TimeCoverageRelationStatistics Valid=128, Invalid=684, Unknown=0, NotChecked=0, Total=812 [2021-07-13 19:15:38,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-07-13 19:15:38,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 114. [2021-07-13 19:15:38,328 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) [2021-07-13 19:15:38,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 238 transitions. [2021-07-13 19:15:38,329 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 238 transitions. Word has length 21 [2021-07-13 19:15:38,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:38,329 INFO L482 AbstractCegarLoop]: Abstraction has 114 states and 238 transitions. [2021-07-13 19:15:38,329 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:38,329 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 238 transitions. [2021-07-13 19:15:38,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:15:38,329 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:38,329 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:38,529 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable237,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:38,530 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:38,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:38,530 INFO L82 PathProgramCache]: Analyzing trace with hash -1721470700, now seen corresponding path program 228 times [2021-07-13 19:15:38,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:38,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812471817] [2021-07-13 19:15:38,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:38,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:38,638 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:38,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:38,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812471817] [2021-07-13 19:15:38,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812471817] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:38,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107557144] [2021-07-13 19:15:38,639 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:15:38,661 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:15:38,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:38,661 WARN L261 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:15:38,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:38,870 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:38,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107557144] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:38,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:38,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 19:15:38,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871705060] [2021-07-13 19:15:38,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:15:38,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:38,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:15:38,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:15:38,871 INFO L87 Difference]: Start difference. First operand 114 states and 238 transitions. Second operand has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:39,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:39,267 INFO L93 Difference]: Finished difference Result 177 states and 348 transitions. [2021-07-13 19:15:39,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:15:39,267 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:15:39,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:39,268 INFO L225 Difference]: With dead ends: 177 [2021-07-13 19:15:39,268 INFO L226 Difference]: Without dead ends: 170 [2021-07-13 19:15:39,268 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 444.4ms TimeCoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:15:39,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-07-13 19:15:39,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 113. [2021-07-13 19:15:39,269 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) [2021-07-13 19:15:39,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 234 transitions. [2021-07-13 19:15:39,269 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 234 transitions. Word has length 21 [2021-07-13 19:15:39,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:39,269 INFO L482 AbstractCegarLoop]: Abstraction has 113 states and 234 transitions. [2021-07-13 19:15:39,269 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:39,269 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 234 transitions. [2021-07-13 19:15:39,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:15:39,270 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:39,270 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:39,470 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2021-07-13 19:15:39,470 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:39,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:39,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1150015894, now seen corresponding path program 229 times [2021-07-13 19:15:39,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:39,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918458542] [2021-07-13 19:15:39,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:39,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:39,575 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:39,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:39,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918458542] [2021-07-13 19:15:39,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918458542] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:39,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076625425] [2021-07-13 19:15:39,575 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 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 [2021-07-13 19:15:39,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:39,598 WARN L261 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:15:39,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:39,813 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:39,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076625425] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:39,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:39,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-13 19:15:39,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988941282] [2021-07-13 19:15:39,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-13 19:15:39,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:39,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-13 19:15:39,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:15:39,814 INFO L87 Difference]: Start difference. First operand 113 states and 234 transitions. Second operand has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:40,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:40,028 INFO L93 Difference]: Finished difference Result 140 states and 279 transitions. [2021-07-13 19:15:40,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:15:40,028 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-07-13 19:15:40,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:40,029 INFO L225 Difference]: With dead ends: 140 [2021-07-13 19:15:40,029 INFO L226 Difference]: Without dead ends: 133 [2021-07-13 19:15:40,029 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 310.3ms TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:15:40,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-07-13 19:15:40,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 111. [2021-07-13 19:15:40,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.081818181818182) internal successors, (229), 110 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:40,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 229 transitions. [2021-07-13 19:15:40,030 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 229 transitions. Word has length 21 [2021-07-13 19:15:40,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:40,030 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 229 transitions. [2021-07-13 19:15:40,030 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:40,030 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 229 transitions. [2021-07-13 19:15:40,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:15:40,030 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:40,030 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:15:40,231 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2021-07-13 19:15:40,231 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:40,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:40,231 INFO L82 PathProgramCache]: Analyzing trace with hash 1759602972, now seen corresponding path program 230 times [2021-07-13 19:15:40,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:40,232 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929922680] [2021-07-13 19:15:40,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:40,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:40,338 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:40,338 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:40,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929922680] [2021-07-13 19:15:40,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929922680] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:40,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351736355] [2021-07-13 19:15:40,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:15:40,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:15:40,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:40,361 WARN L261 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-13 19:15:40,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown