/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-crafted/xor1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 18:37:01,910 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 18:37:01,912 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 18:37:01,923 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 18:37:01,923 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 18:37:01,924 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 18:37:01,926 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 18:37:01,927 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 18:37:01,929 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 18:37:01,930 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 18:37:01,931 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 18:37:01,932 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 18:37:01,932 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 18:37:01,933 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 18:37:01,934 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 18:37:01,936 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 18:37:01,943 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 18:37:01,945 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 18:37:01,947 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 18:37:01,949 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 18:37:01,950 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 18:37:01,951 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 18:37:01,952 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 18:37:01,953 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 18:37:01,955 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 18:37:01,963 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 18:37:01,964 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 18:37:01,964 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 18:37:01,965 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-06 18:37:01,978 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 18:37:01,979 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 18:37:01,980 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 18:37:01,980 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 18:37:01,980 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 18:37:01,980 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 18:37:01,981 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 18:37:01,981 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 18:37:01,981 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 18:37:01,981 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 18:37:01,981 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 18:37:01,981 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 18:37:01,982 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 18:37:01,982 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 18:37:01,982 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 18:37:01,982 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 18:37:01,982 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 18:37:01,983 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 18:37:01,983 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 18:37:01,983 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 18:37:01,983 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 18:37:01,983 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 18:37:01,984 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 18:37:01,984 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 18:37:01,984 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 18:37:01,984 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 18:37:01,984 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 18:37:01,985 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 18:37:01,985 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 18:37:02,248 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 18:37:02,260 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 18:37:02,263 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 18:37:02,264 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 18:37:02,265 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 18:37:02,265 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/xor1.i [2019-11-06 18:37:02,340 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/043001ce9/88c6ca676ed4475e9232dda2f5150314/FLAG09bb6539d [2019-11-06 18:37:02,822 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 18:37:02,825 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/xor1.i [2019-11-06 18:37:02,832 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/043001ce9/88c6ca676ed4475e9232dda2f5150314/FLAG09bb6539d [2019-11-06 18:37:03,242 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/043001ce9/88c6ca676ed4475e9232dda2f5150314 [2019-11-06 18:37:03,250 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 18:37:03,252 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 18:37:03,253 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 18:37:03,253 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 18:37:03,257 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 18:37:03,258 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:37:03" (1/1) ... [2019-11-06 18:37:03,261 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@672577b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:37:03, skipping insertion in model container [2019-11-06 18:37:03,261 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:37:03" (1/1) ... [2019-11-06 18:37:03,268 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 18:37:03,286 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 18:37:03,485 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:37:03,495 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 18:37:03,516 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:37:03,612 INFO L192 MainTranslator]: Completed translation [2019-11-06 18:37:03,613 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:37:03 WrapperNode [2019-11-06 18:37:03,613 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 18:37:03,614 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 18:37:03,614 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 18:37:03,614 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 18:37:03,628 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:37:03" (1/1) ... [2019-11-06 18:37:03,628 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:37:03" (1/1) ... [2019-11-06 18:37:03,638 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:37:03" (1/1) ... [2019-11-06 18:37:03,638 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:37:03" (1/1) ... [2019-11-06 18:37:03,655 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:37:03" (1/1) ... [2019-11-06 18:37:03,661 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:37:03" (1/1) ... [2019-11-06 18:37:03,662 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:37:03" (1/1) ... [2019-11-06 18:37:03,664 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 18:37:03,665 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 18:37:03,665 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 18:37:03,665 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 18:37:03,666 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:37:03" (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 [2019-11-06 18:37:03,732 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 18:37:03,732 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 18:37:03,732 INFO L138 BoogieDeclarations]: Found implementation of procedure xor [2019-11-06 18:37:03,732 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 18:37:03,732 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 18:37:03,733 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 18:37:03,733 INFO L130 BoogieDeclarations]: Found specification of procedure xor [2019-11-06 18:37:03,733 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-06 18:37:03,733 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 18:37:03,733 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-06 18:37:03,733 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-06 18:37:03,733 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-06 18:37:03,734 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 18:37:03,734 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 18:37:03,974 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 18:37:03,974 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-11-06 18:37:03,976 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:37:03 BoogieIcfgContainer [2019-11-06 18:37:03,976 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 18:37:03,977 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 18:37:03,977 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 18:37:03,980 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 18:37:03,981 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 06:37:03" (1/3) ... [2019-11-06 18:37:03,981 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9387948 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:37:03, skipping insertion in model container [2019-11-06 18:37:03,982 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:37:03" (2/3) ... [2019-11-06 18:37:03,982 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9387948 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:37:03, skipping insertion in model container [2019-11-06 18:37:03,982 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:37:03" (3/3) ... [2019-11-06 18:37:03,984 INFO L109 eAbstractionObserver]: Analyzing ICFG xor1.i [2019-11-06 18:37:03,995 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 18:37:04,003 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 18:37:04,015 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 18:37:04,052 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 18:37:04,053 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 18:37:04,053 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 18:37:04,053 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 18:37:04,053 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 18:37:04,054 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 18:37:04,054 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 18:37:04,054 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 18:37:04,077 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2019-11-06 18:37:04,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-06 18:37:04,085 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:37:04,087 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:37:04,088 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:37:04,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:37:04,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1461178031, now seen corresponding path program 1 times [2019-11-06 18:37:04,105 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:37:04,106 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609325957] [2019-11-06 18:37:04,106 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:37:04,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:04,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:04,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:04,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:04,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:04,333 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-06 18:37:04,334 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609325957] [2019-11-06 18:37:04,335 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:37:04,336 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 18:37:04,336 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816228749] [2019-11-06 18:37:04,341 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 18:37:04,342 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:37:04,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 18:37:04,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:37:04,356 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 3 states. [2019-11-06 18:37:04,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:37:04,477 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2019-11-06 18:37:04,478 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 18:37:04,479 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2019-11-06 18:37:04,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:37:04,489 INFO L225 Difference]: With dead ends: 54 [2019-11-06 18:37:04,493 INFO L226 Difference]: Without dead ends: 26 [2019-11-06 18:37:04,500 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:37:04,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-06 18:37:04,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-11-06 18:37:04,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-06 18:37:04,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2019-11-06 18:37:04,546 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 32 [2019-11-06 18:37:04,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:37:04,547 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2019-11-06 18:37:04,547 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 18:37:04,547 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2019-11-06 18:37:04,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-06 18:37:04,550 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:37:04,550 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:37:04,551 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:37:04,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:37:04,551 INFO L82 PathProgramCache]: Analyzing trace with hash -595992629, now seen corresponding path program 1 times [2019-11-06 18:37:04,552 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:37:04,552 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447490819] [2019-11-06 18:37:04,552 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:37:04,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:04,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:04,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:04,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:04,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:04,733 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-06 18:37:04,734 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447490819] [2019-11-06 18:37:04,735 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295864144] [2019-11-06 18:37:04,736 INFO L94 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 [2019-11-06 18:37:04,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:04,819 INFO L256 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-06 18:37:04,826 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:37:04,860 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-06 18:37:04,861 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:37:04,861 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2019-11-06 18:37:04,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186331039] [2019-11-06 18:37:04,863 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 18:37:04,864 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:37:04,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 18:37:04,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:37:04,865 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 3 states. [2019-11-06 18:37:04,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:37:04,880 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2019-11-06 18:37:04,881 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 18:37:04,881 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2019-11-06 18:37:04,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:37:04,882 INFO L225 Difference]: With dead ends: 46 [2019-11-06 18:37:04,882 INFO L226 Difference]: Without dead ends: 28 [2019-11-06 18:37:04,883 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:37:04,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-06 18:37:04,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2019-11-06 18:37:04,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-06 18:37:04,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2019-11-06 18:37:04,895 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 32 [2019-11-06 18:37:04,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:37:04,898 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2019-11-06 18:37:04,899 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 18:37:04,899 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2019-11-06 18:37:04,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-06 18:37:04,902 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:37:04,902 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:37:05,105 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:37:05,111 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:37:05,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:37:05,112 INFO L82 PathProgramCache]: Analyzing trace with hash 169606189, now seen corresponding path program 1 times [2019-11-06 18:37:05,112 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:37:05,112 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995629844] [2019-11-06 18:37:05,112 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:37:05,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:05,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:05,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:05,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:05,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:05,230 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-06 18:37:05,231 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995629844] [2019-11-06 18:37:05,231 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416365443] [2019-11-06 18:37:05,231 INFO L94 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 [2019-11-06 18:37:05,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:05,295 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-06 18:37:05,298 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:37:05,304 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-06 18:37:05,305 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:37:05,305 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2019-11-06 18:37:05,305 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186973896] [2019-11-06 18:37:05,306 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 18:37:05,306 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:37:05,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 18:37:05,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:37:05,307 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 3 states. [2019-11-06 18:37:05,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:37:05,322 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2019-11-06 18:37:05,323 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 18:37:05,323 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 34 [2019-11-06 18:37:05,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:37:05,324 INFO L225 Difference]: With dead ends: 46 [2019-11-06 18:37:05,324 INFO L226 Difference]: Without dead ends: 29 [2019-11-06 18:37:05,325 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:37:05,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-06 18:37:05,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-11-06 18:37:05,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-06 18:37:05,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2019-11-06 18:37:05,332 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 34 [2019-11-06 18:37:05,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:37:05,332 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2019-11-06 18:37:05,333 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 18:37:05,333 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2019-11-06 18:37:05,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-11-06 18:37:05,334 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:37:05,334 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:37:05,538 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:37:05,538 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:37:05,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:37:05,539 INFO L82 PathProgramCache]: Analyzing trace with hash -1462689141, now seen corresponding path program 1 times [2019-11-06 18:37:05,539 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:37:05,539 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129305722] [2019-11-06 18:37:05,540 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:37:05,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:05,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:05,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:05,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:05,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:05,686 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-06 18:37:05,688 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129305722] [2019-11-06 18:37:05,688 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534564873] [2019-11-06 18:37:05,688 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-11-06 18:37:05,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:05,775 INFO L256 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-06 18:37:05,782 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:37:05,801 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-11-06 18:37:05,805 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:37:05,805 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-11-06 18:37:05,806 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463577439] [2019-11-06 18:37:05,806 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 18:37:05,806 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:37:05,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 18:37:05,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:37:05,807 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 3 states. [2019-11-06 18:37:05,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:37:05,828 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2019-11-06 18:37:05,830 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 18:37:05,830 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 40 [2019-11-06 18:37:05,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:37:05,832 INFO L225 Difference]: With dead ends: 43 [2019-11-06 18:37:05,832 INFO L226 Difference]: Without dead ends: 30 [2019-11-06 18:37:05,833 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:37:05,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-06 18:37:05,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2019-11-06 18:37:05,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-06 18:37:05,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2019-11-06 18:37:05,843 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 40 [2019-11-06 18:37:05,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:37:05,847 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2019-11-06 18:37:05,847 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 18:37:05,848 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2019-11-06 18:37:05,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-11-06 18:37:05,851 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:37:05,852 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:37:06,055 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:37:06,055 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:37:06,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:37:06,056 INFO L82 PathProgramCache]: Analyzing trace with hash -233991671, now seen corresponding path program 1 times [2019-11-06 18:37:06,056 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:37:06,056 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732617649] [2019-11-06 18:37:06,057 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:37:06,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:06,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:06,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:06,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:06,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:06,197 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-06 18:37:06,197 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732617649] [2019-11-06 18:37:06,198 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502798446] [2019-11-06 18:37:06,198 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-11-06 18:37:06,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:06,251 INFO L256 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 18:37:06,254 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:37:06,277 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-11-06 18:37:06,277 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:37:06,277 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 8 [2019-11-06 18:37:06,278 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256165472] [2019-11-06 18:37:06,278 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 18:37:06,279 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:37:06,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 18:37:06,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-06 18:37:06,279 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 8 states. [2019-11-06 18:37:06,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:37:06,431 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2019-11-06 18:37:06,434 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 18:37:06,435 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 42 [2019-11-06 18:37:06,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:37:06,436 INFO L225 Difference]: With dead ends: 55 [2019-11-06 18:37:06,436 INFO L226 Difference]: Without dead ends: 35 [2019-11-06 18:37:06,436 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2019-11-06 18:37:06,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-06 18:37:06,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2019-11-06 18:37:06,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-06 18:37:06,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2019-11-06 18:37:06,447 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 42 [2019-11-06 18:37:06,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:37:06,449 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2019-11-06 18:37:06,450 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 18:37:06,450 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2019-11-06 18:37:06,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-11-06 18:37:06,456 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:37:06,456 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:37:06,656 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:37:06,657 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:37:06,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:37:06,657 INFO L82 PathProgramCache]: Analyzing trace with hash -52274487, now seen corresponding path program 2 times [2019-11-06 18:37:06,658 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:37:06,658 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612832474] [2019-11-06 18:37:06,658 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:37:06,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:06,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:06,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:06,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:06,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:06,761 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-06 18:37:06,761 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612832474] [2019-11-06 18:37:06,761 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670698621] [2019-11-06 18:37:06,762 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:37:06,836 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:37:06,836 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:37:06,838 INFO L256 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 18:37:06,852 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:37:06,877 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-06 18:37:06,877 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:37:06,878 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-11-06 18:37:06,878 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725519816] [2019-11-06 18:37:06,879 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 18:37:06,880 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:37:06,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 18:37:06,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:37:06,881 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 7 states. [2019-11-06 18:37:06,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:37:06,986 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2019-11-06 18:37:06,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 18:37:06,987 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 50 [2019-11-06 18:37:06,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:37:06,988 INFO L225 Difference]: With dead ends: 58 [2019-11-06 18:37:06,988 INFO L226 Difference]: Without dead ends: 36 [2019-11-06 18:37:06,988 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:37:06,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-06 18:37:06,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2019-11-06 18:37:07,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-06 18:37:07,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2019-11-06 18:37:07,002 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 50 [2019-11-06 18:37:07,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:37:07,004 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2019-11-06 18:37:07,004 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 18:37:07,004 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2019-11-06 18:37:07,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-11-06 18:37:07,008 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:37:07,008 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:37:07,216 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:37:07,216 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:37:07,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:37:07,217 INFO L82 PathProgramCache]: Analyzing trace with hash 602858155, now seen corresponding path program 3 times [2019-11-06 18:37:07,218 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:37:07,218 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717854187] [2019-11-06 18:37:07,218 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:37:07,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:07,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:07,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:07,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:07,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:07,344 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-06 18:37:07,344 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717854187] [2019-11-06 18:37:07,345 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301246491] [2019-11-06 18:37:07,359 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2019-11-06 18:37:07,423 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-06 18:37:07,423 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:37:07,424 INFO L256 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 18:37:07,432 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:37:07,463 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 34 proven. 1 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-11-06 18:37:07,463 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:37:07,463 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 9 [2019-11-06 18:37:07,464 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633366643] [2019-11-06 18:37:07,464 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 18:37:07,464 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:37:07,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 18:37:07,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-06 18:37:07,465 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 9 states. [2019-11-06 18:37:07,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:37:07,583 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2019-11-06 18:37:07,583 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 18:37:07,583 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 52 [2019-11-06 18:37:07,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:37:07,584 INFO L225 Difference]: With dead ends: 63 [2019-11-06 18:37:07,585 INFO L226 Difference]: Without dead ends: 41 [2019-11-06 18:37:07,585 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-06 18:37:07,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-06 18:37:07,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2019-11-06 18:37:07,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-06 18:37:07,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2019-11-06 18:37:07,594 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 52 [2019-11-06 18:37:07,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:37:07,595 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2019-11-06 18:37:07,595 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 18:37:07,595 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2019-11-06 18:37:07,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-11-06 18:37:07,596 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:37:07,596 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:37:07,801 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:37:07,801 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:37:07,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:37:07,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1804278027, now seen corresponding path program 4 times [2019-11-06 18:37:07,802 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:37:07,802 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389657436] [2019-11-06 18:37:07,802 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:37:07,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:07,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:07,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:07,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:07,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:07,921 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-11-06 18:37:07,922 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389657436] [2019-11-06 18:37:07,922 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311387699] [2019-11-06 18:37:07,922 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2019-11-06 18:37:07,990 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:37:07,990 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:37:07,991 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 18:37:07,999 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:37:08,021 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-11-06 18:37:08,024 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:37:08,024 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-11-06 18:37:08,025 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298643500] [2019-11-06 18:37:08,025 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 18:37:08,026 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:37:08,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 18:37:08,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-11-06 18:37:08,027 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 9 states. [2019-11-06 18:37:08,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:37:08,148 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2019-11-06 18:37:08,148 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 18:37:08,148 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 56 [2019-11-06 18:37:08,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:37:08,149 INFO L225 Difference]: With dead ends: 66 [2019-11-06 18:37:08,149 INFO L226 Difference]: Without dead ends: 42 [2019-11-06 18:37:08,150 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-11-06 18:37:08,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-11-06 18:37:08,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2019-11-06 18:37:08,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-06 18:37:08,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2019-11-06 18:37:08,156 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 56 [2019-11-06 18:37:08,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:37:08,156 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2019-11-06 18:37:08,156 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 18:37:08,156 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2019-11-06 18:37:08,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-11-06 18:37:08,157 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:37:08,157 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:37:08,361 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:37:08,362 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:37:08,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:37:08,363 INFO L82 PathProgramCache]: Analyzing trace with hash 907456365, now seen corresponding path program 5 times [2019-11-06 18:37:08,363 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:37:08,364 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666943698] [2019-11-06 18:37:08,364 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:37:08,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:08,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:08,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:08,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:08,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:08,501 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-11-06 18:37:08,502 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666943698] [2019-11-06 18:37:08,502 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462422056] [2019-11-06 18:37:08,502 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:37:08,599 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-06 18:37:08,599 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:37:08,600 INFO L256 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 18:37:08,603 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:37:08,637 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 28 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-11-06 18:37:08,638 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:37:08,638 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2019-11-06 18:37:08,638 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31177940] [2019-11-06 18:37:08,639 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 18:37:08,639 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:37:08,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 18:37:08,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-11-06 18:37:08,640 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 12 states. [2019-11-06 18:37:08,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:37:08,810 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2019-11-06 18:37:08,811 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 18:37:08,811 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 58 [2019-11-06 18:37:08,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:37:08,812 INFO L225 Difference]: With dead ends: 71 [2019-11-06 18:37:08,812 INFO L226 Difference]: Without dead ends: 47 [2019-11-06 18:37:08,813 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2019-11-06 18:37:08,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-11-06 18:37:08,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2019-11-06 18:37:08,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-11-06 18:37:08,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2019-11-06 18:37:08,818 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 58 [2019-11-06 18:37:08,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:37:08,819 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2019-11-06 18:37:08,819 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 18:37:08,819 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2019-11-06 18:37:08,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-11-06 18:37:08,820 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:37:08,820 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:37:09,025 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:37:09,025 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:37:09,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:37:09,026 INFO L82 PathProgramCache]: Analyzing trace with hash -1617233875, now seen corresponding path program 6 times [2019-11-06 18:37:09,027 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:37:09,027 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533569980] [2019-11-06 18:37:09,028 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:37:09,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:09,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:09,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:09,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:09,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:09,143 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2019-11-06 18:37:09,143 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533569980] [2019-11-06 18:37:09,144 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944896552] [2019-11-06 18:37:09,144 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2019-11-06 18:37:09,222 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-06 18:37:09,223 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:37:09,224 INFO L256 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-06 18:37:09,226 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:37:09,281 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 56 proven. 9 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2019-11-06 18:37:09,282 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:37:09,282 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 14 [2019-11-06 18:37:09,282 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918853522] [2019-11-06 18:37:09,283 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-06 18:37:09,283 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:37:09,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-06 18:37:09,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-11-06 18:37:09,284 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 14 states. [2019-11-06 18:37:09,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:37:09,471 INFO L93 Difference]: Finished difference Result 77 states and 89 transitions. [2019-11-06 18:37:09,471 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-06 18:37:09,471 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 66 [2019-11-06 18:37:09,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:37:09,472 INFO L225 Difference]: With dead ends: 77 [2019-11-06 18:37:09,472 INFO L226 Difference]: Without dead ends: 51 [2019-11-06 18:37:09,473 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2019-11-06 18:37:09,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-11-06 18:37:09,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2019-11-06 18:37:09,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-11-06 18:37:09,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2019-11-06 18:37:09,483 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 66 [2019-11-06 18:37:09,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:37:09,483 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2019-11-06 18:37:09,483 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-06 18:37:09,483 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2019-11-06 18:37:09,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2019-11-06 18:37:09,484 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:37:09,484 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 7, 7, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:37:09,685 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:37:09,686 INFO L410 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:37:09,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:37:09,686 INFO L82 PathProgramCache]: Analyzing trace with hash 592539373, now seen corresponding path program 7 times [2019-11-06 18:37:09,686 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:37:09,686 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922009614] [2019-11-06 18:37:09,687 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:37:09,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:09,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:09,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:09,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:09,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:09,797 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-11-06 18:37:09,798 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922009614] [2019-11-06 18:37:09,798 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045347571] [2019-11-06 18:37:09,798 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:37:09,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:09,866 INFO L256 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-06 18:37:09,868 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:37:09,908 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-11-06 18:37:09,909 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:37:09,909 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-11-06 18:37:09,911 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252166482] [2019-11-06 18:37:09,912 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 18:37:09,912 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:37:09,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 18:37:09,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-11-06 18:37:09,913 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 12 states. [2019-11-06 18:37:09,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:37:09,997 INFO L93 Difference]: Finished difference Result 80 states and 88 transitions. [2019-11-06 18:37:09,997 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 18:37:09,998 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 74 [2019-11-06 18:37:09,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:37:09,999 INFO L225 Difference]: With dead ends: 80 [2019-11-06 18:37:09,999 INFO L226 Difference]: Without dead ends: 52 [2019-11-06 18:37:10,000 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-11-06 18:37:10,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-11-06 18:37:10,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2019-11-06 18:37:10,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-11-06 18:37:10,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2019-11-06 18:37:10,016 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 74 [2019-11-06 18:37:10,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:37:10,016 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2019-11-06 18:37:10,016 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 18:37:10,016 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2019-11-06 18:37:10,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-11-06 18:37:10,017 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:37:10,017 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 8, 8, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:37:10,223 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:37:10,223 INFO L410 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:37:10,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:37:10,223 INFO L82 PathProgramCache]: Analyzing trace with hash 295497935, now seen corresponding path program 8 times [2019-11-06 18:37:10,224 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:37:10,224 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086328055] [2019-11-06 18:37:10,224 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:37:10,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:10,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:10,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:10,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:10,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:10,353 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-11-06 18:37:10,353 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086328055] [2019-11-06 18:37:10,353 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672897001] [2019-11-06 18:37:10,354 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:37:10,412 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:37:10,413 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:37:10,414 INFO L256 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-06 18:37:10,416 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:37:10,436 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-11-06 18:37:10,436 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:37:10,436 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-11-06 18:37:10,437 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878359743] [2019-11-06 18:37:10,437 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-06 18:37:10,437 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:37:10,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-06 18:37:10,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-11-06 18:37:10,439 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 13 states. [2019-11-06 18:37:10,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:37:10,544 INFO L93 Difference]: Finished difference Result 82 states and 90 transitions. [2019-11-06 18:37:10,544 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 18:37:10,544 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 76 [2019-11-06 18:37:10,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:37:10,545 INFO L225 Difference]: With dead ends: 82 [2019-11-06 18:37:10,545 INFO L226 Difference]: Without dead ends: 54 [2019-11-06 18:37:10,546 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-11-06 18:37:10,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-06 18:37:10,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2019-11-06 18:37:10,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-11-06 18:37:10,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2019-11-06 18:37:10,551 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 76 [2019-11-06 18:37:10,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:37:10,552 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2019-11-06 18:37:10,552 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-06 18:37:10,552 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2019-11-06 18:37:10,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-11-06 18:37:10,553 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:37:10,553 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 9, 9, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:37:10,756 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:37:10,756 INFO L410 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:37:10,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:37:10,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1693482447, now seen corresponding path program 9 times [2019-11-06 18:37:10,757 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:37:10,758 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917806746] [2019-11-06 18:37:10,758 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:37:10,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:10,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:10,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:10,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:10,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:10,892 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-11-06 18:37:10,893 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917806746] [2019-11-06 18:37:10,893 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404323975] [2019-11-06 18:37:10,893 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2019-11-06 18:37:10,971 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-06 18:37:10,972 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:37:10,972 INFO L256 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 18:37:10,975 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:37:11,031 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 90 proven. 4 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2019-11-06 18:37:11,031 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:37:11,032 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5] total 16 [2019-11-06 18:37:11,032 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683148603] [2019-11-06 18:37:11,032 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-06 18:37:11,033 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:37:11,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-06 18:37:11,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2019-11-06 18:37:11,034 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand 16 states. [2019-11-06 18:37:11,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:37:11,214 INFO L93 Difference]: Finished difference Result 87 states and 96 transitions. [2019-11-06 18:37:11,215 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-06 18:37:11,215 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 78 [2019-11-06 18:37:11,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:37:11,216 INFO L225 Difference]: With dead ends: 87 [2019-11-06 18:37:11,216 INFO L226 Difference]: Without dead ends: 59 [2019-11-06 18:37:11,217 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2019-11-06 18:37:11,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-11-06 18:37:11,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 57. [2019-11-06 18:37:11,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-11-06 18:37:11,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2019-11-06 18:37:11,224 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 78 [2019-11-06 18:37:11,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:37:11,225 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2019-11-06 18:37:11,225 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-06 18:37:11,225 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2019-11-06 18:37:11,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-11-06 18:37:11,226 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:37:11,226 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 10, 10, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:37:11,441 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:37:11,441 INFO L410 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:37:11,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:37:11,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1088178321, now seen corresponding path program 10 times [2019-11-06 18:37:11,442 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:37:11,442 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171079927] [2019-11-06 18:37:11,442 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:37:11,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:11,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:11,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:11,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:11,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:11,614 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2019-11-06 18:37:11,614 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171079927] [2019-11-06 18:37:11,614 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527255249] [2019-11-06 18:37:11,615 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2019-11-06 18:37:11,686 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:37:11,687 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:37:11,688 INFO L256 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 18:37:11,690 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:37:11,765 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 88 proven. 16 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2019-11-06 18:37:11,766 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:37:11,766 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7] total 19 [2019-11-06 18:37:11,766 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300858927] [2019-11-06 18:37:11,767 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-06 18:37:11,767 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:37:11,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-06 18:37:11,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2019-11-06 18:37:11,768 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand 19 states. [2019-11-06 18:37:12,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:37:12,034 INFO L93 Difference]: Finished difference Result 93 states and 105 transitions. [2019-11-06 18:37:12,035 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-06 18:37:12,035 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 82 [2019-11-06 18:37:12,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:37:12,036 INFO L225 Difference]: With dead ends: 93 [2019-11-06 18:37:12,037 INFO L226 Difference]: Without dead ends: 63 [2019-11-06 18:37:12,039 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=140, Invalid=412, Unknown=0, NotChecked=0, Total=552 [2019-11-06 18:37:12,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-11-06 18:37:12,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2019-11-06 18:37:12,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-11-06 18:37:12,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2019-11-06 18:37:12,049 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 82 [2019-11-06 18:37:12,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:37:12,049 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2019-11-06 18:37:12,049 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-06 18:37:12,049 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2019-11-06 18:37:12,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-11-06 18:37:12,050 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:37:12,050 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 11, 11, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:37:12,251 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:37:12,251 INFO L410 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:37:12,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:37:12,252 INFO L82 PathProgramCache]: Analyzing trace with hash -1682227375, now seen corresponding path program 11 times [2019-11-06 18:37:12,252 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:37:12,252 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989602393] [2019-11-06 18:37:12,252 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:37:12,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:12,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:12,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:12,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:12,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:12,391 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2019-11-06 18:37:12,392 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989602393] [2019-11-06 18:37:12,392 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630587050] [2019-11-06 18:37:12,392 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:37:12,773 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-11-06 18:37:12,773 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:37:12,775 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 18:37:12,777 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:37:12,867 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 124 proven. 25 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2019-11-06 18:37:12,867 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:37:12,867 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8] total 21 [2019-11-06 18:37:12,868 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266560439] [2019-11-06 18:37:12,868 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-06 18:37:12,869 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:37:12,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-06 18:37:12,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2019-11-06 18:37:12,869 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand 21 states. [2019-11-06 18:37:13,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:37:13,114 INFO L93 Difference]: Finished difference Result 99 states and 111 transitions. [2019-11-06 18:37:13,114 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-06 18:37:13,115 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 90 [2019-11-06 18:37:13,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:37:13,116 INFO L225 Difference]: With dead ends: 99 [2019-11-06 18:37:13,116 INFO L226 Difference]: Without dead ends: 67 [2019-11-06 18:37:13,117 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=528, Unknown=0, NotChecked=0, Total=702 [2019-11-06 18:37:13,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-11-06 18:37:13,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2019-11-06 18:37:13,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-11-06 18:37:13,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2019-11-06 18:37:13,123 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 90 [2019-11-06 18:37:13,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:37:13,123 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2019-11-06 18:37:13,123 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-06 18:37:13,123 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2019-11-06 18:37:13,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-11-06 18:37:13,125 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:37:13,125 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 12, 12, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:37:13,329 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:37:13,330 INFO L410 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:37:13,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:37:13,330 INFO L82 PathProgramCache]: Analyzing trace with hash -204807151, now seen corresponding path program 12 times [2019-11-06 18:37:13,331 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:37:13,331 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977893526] [2019-11-06 18:37:13,331 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:37:13,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:13,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:13,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:13,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:13,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:13,503 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2019-11-06 18:37:13,504 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977893526] [2019-11-06 18:37:13,504 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666554331] [2019-11-06 18:37:13,504 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2019-11-06 18:37:13,608 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-11-06 18:37:13,609 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:37:13,610 INFO L256 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-06 18:37:13,611 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:37:13,681 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 178 proven. 9 refuted. 0 times theorem prover too weak. 341 trivial. 0 not checked. [2019-11-06 18:37:13,681 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:37:13,681 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 6] total 20 [2019-11-06 18:37:13,682 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56048203] [2019-11-06 18:37:13,682 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-06 18:37:13,682 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:37:13,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-06 18:37:13,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2019-11-06 18:37:13,683 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand 20 states. [2019-11-06 18:37:13,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:37:13,875 INFO L93 Difference]: Finished difference Result 105 states and 114 transitions. [2019-11-06 18:37:13,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-06 18:37:13,875 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 98 [2019-11-06 18:37:13,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:37:13,876 INFO L225 Difference]: With dead ends: 105 [2019-11-06 18:37:13,877 INFO L226 Difference]: Without dead ends: 71 [2019-11-06 18:37:13,878 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2019-11-06 18:37:13,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-11-06 18:37:13,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69. [2019-11-06 18:37:13,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-11-06 18:37:13,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 73 transitions. [2019-11-06 18:37:13,885 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 73 transitions. Word has length 98 [2019-11-06 18:37:13,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:37:13,886 INFO L462 AbstractCegarLoop]: Abstraction has 69 states and 73 transitions. [2019-11-06 18:37:13,886 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-06 18:37:13,886 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 73 transitions. [2019-11-06 18:37:13,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-11-06 18:37:13,887 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:37:13,887 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 13, 13, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:37:14,097 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:37:14,098 INFO L410 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:37:14,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:37:14,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1908818575, now seen corresponding path program 13 times [2019-11-06 18:37:14,099 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:37:14,099 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407354041] [2019-11-06 18:37:14,099 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:37:14,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:14,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:14,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:14,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:14,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:14,284 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-11-06 18:37:14,285 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407354041] [2019-11-06 18:37:14,285 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236819082] [2019-11-06 18:37:14,285 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2019-11-06 18:37:14,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:14,360 INFO L256 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-06 18:37:14,362 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:37:14,397 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-11-06 18:37:14,397 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:37:14,398 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2019-11-06 18:37:14,398 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142175152] [2019-11-06 18:37:14,398 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-06 18:37:14,399 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:37:14,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-06 18:37:14,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-11-06 18:37:14,399 INFO L87 Difference]: Start difference. First operand 69 states and 73 transitions. Second operand 18 states. [2019-11-06 18:37:14,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:37:14,498 INFO L93 Difference]: Finished difference Result 108 states and 116 transitions. [2019-11-06 18:37:14,498 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-06 18:37:14,499 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 102 [2019-11-06 18:37:14,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:37:14,500 INFO L225 Difference]: With dead ends: 108 [2019-11-06 18:37:14,500 INFO L226 Difference]: Without dead ends: 72 [2019-11-06 18:37:14,500 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-11-06 18:37:14,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-11-06 18:37:14,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2019-11-06 18:37:14,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-11-06 18:37:14,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2019-11-06 18:37:14,505 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 102 [2019-11-06 18:37:14,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:37:14,506 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2019-11-06 18:37:14,506 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-06 18:37:14,506 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2019-11-06 18:37:14,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-11-06 18:37:14,507 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:37:14,507 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 14, 14, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:37:14,715 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:37:14,715 INFO L410 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:37:14,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:37:14,716 INFO L82 PathProgramCache]: Analyzing trace with hash 682719315, now seen corresponding path program 14 times [2019-11-06 18:37:14,716 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:37:14,716 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137545216] [2019-11-06 18:37:14,717 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:37:14,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:14,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:14,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:14,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:14,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:14,932 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-11-06 18:37:14,933 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137545216] [2019-11-06 18:37:14,933 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573932292] [2019-11-06 18:37:14,933 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:37:15,013 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:37:15,014 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:37:15,015 INFO L256 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-06 18:37:15,019 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:37:15,047 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-11-06 18:37:15,048 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:37:15,048 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2019-11-06 18:37:15,048 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426829804] [2019-11-06 18:37:15,048 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-06 18:37:15,049 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:37:15,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-06 18:37:15,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-11-06 18:37:15,050 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand 19 states. [2019-11-06 18:37:15,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:37:15,179 INFO L93 Difference]: Finished difference Result 110 states and 118 transitions. [2019-11-06 18:37:15,179 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-06 18:37:15,179 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 104 [2019-11-06 18:37:15,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:37:15,180 INFO L225 Difference]: With dead ends: 110 [2019-11-06 18:37:15,180 INFO L226 Difference]: Without dead ends: 74 [2019-11-06 18:37:15,181 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-11-06 18:37:15,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-11-06 18:37:15,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2019-11-06 18:37:15,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-11-06 18:37:15,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2019-11-06 18:37:15,186 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 104 [2019-11-06 18:37:15,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:37:15,186 INFO L462 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2019-11-06 18:37:15,187 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-06 18:37:15,187 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2019-11-06 18:37:15,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2019-11-06 18:37:15,188 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:37:15,188 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 15, 15, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:37:15,391 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:37:15,391 INFO L410 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:37:15,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:37:15,392 INFO L82 PathProgramCache]: Analyzing trace with hash 69599925, now seen corresponding path program 15 times [2019-11-06 18:37:15,392 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:37:15,392 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395167983] [2019-11-06 18:37:15,392 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:37:15,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:15,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:15,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:15,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:15,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:15,599 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-11-06 18:37:15,599 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395167983] [2019-11-06 18:37:15,599 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794244352] [2019-11-06 18:37:15,599 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2019-11-06 18:37:15,685 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-06 18:37:15,686 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:37:15,687 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 18:37:15,688 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:37:15,815 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 178 proven. 16 refuted. 0 times theorem prover too weak. 422 trivial. 0 not checked. [2019-11-06 18:37:15,816 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:37:15,816 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 7] total 24 [2019-11-06 18:37:15,816 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107425835] [2019-11-06 18:37:15,817 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-06 18:37:15,817 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:37:15,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-06 18:37:15,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=377, Unknown=0, NotChecked=0, Total=552 [2019-11-06 18:37:15,818 INFO L87 Difference]: Start difference. First operand 73 states and 77 transitions. Second operand 24 states. [2019-11-06 18:37:16,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:37:16,081 INFO L93 Difference]: Finished difference Result 115 states and 124 transitions. [2019-11-06 18:37:16,082 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-06 18:37:16,082 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 106 [2019-11-06 18:37:16,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:37:16,084 INFO L225 Difference]: With dead ends: 115 [2019-11-06 18:37:16,084 INFO L226 Difference]: Without dead ends: 79 [2019-11-06 18:37:16,085 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=175, Invalid=377, Unknown=0, NotChecked=0, Total=552 [2019-11-06 18:37:16,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-11-06 18:37:16,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2019-11-06 18:37:16,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-11-06 18:37:16,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2019-11-06 18:37:16,091 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 106 [2019-11-06 18:37:16,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:37:16,092 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2019-11-06 18:37:16,092 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-06 18:37:16,092 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2019-11-06 18:37:16,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-11-06 18:37:16,094 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:37:16,094 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 16, 16, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:37:16,299 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:37:16,300 INFO L410 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:37:16,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:37:16,300 INFO L82 PathProgramCache]: Analyzing trace with hash -901824235, now seen corresponding path program 16 times [2019-11-06 18:37:16,300 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:37:16,300 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408071393] [2019-11-06 18:37:16,301 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:37:16,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:16,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:16,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:16,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:16,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:16,664 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-11-06 18:37:16,667 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408071393] [2019-11-06 18:37:16,667 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074952731] [2019-11-06 18:37:16,668 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2019-11-06 18:37:16,827 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:37:16,827 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:37:16,830 INFO L256 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-06 18:37:16,833 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:37:16,880 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-11-06 18:37:16,881 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:37:16,881 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2019-11-06 18:37:16,882 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883819886] [2019-11-06 18:37:16,883 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-06 18:37:16,883 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:37:16,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-06 18:37:16,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-11-06 18:37:16,884 INFO L87 Difference]: Start difference. First operand 77 states and 81 transitions. Second operand 21 states. [2019-11-06 18:37:17,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:37:17,053 INFO L93 Difference]: Finished difference Result 118 states and 126 transitions. [2019-11-06 18:37:17,054 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-06 18:37:17,054 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 110 [2019-11-06 18:37:17,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:37:17,055 INFO L225 Difference]: With dead ends: 118 [2019-11-06 18:37:17,056 INFO L226 Difference]: Without dead ends: 80 [2019-11-06 18:37:17,056 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-11-06 18:37:17,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-11-06 18:37:17,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2019-11-06 18:37:17,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-11-06 18:37:17,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2019-11-06 18:37:17,062 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 110 [2019-11-06 18:37:17,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:37:17,063 INFO L462 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2019-11-06 18:37:17,063 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-06 18:37:17,063 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2019-11-06 18:37:17,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-11-06 18:37:17,064 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:37:17,064 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:37:17,268 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:37:17,268 INFO L410 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:37:17,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:37:17,269 INFO L82 PathProgramCache]: Analyzing trace with hash -1698235913, now seen corresponding path program 17 times [2019-11-06 18:37:17,269 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:37:17,270 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348808627] [2019-11-06 18:37:17,270 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:37:17,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:17,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:17,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:17,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:17,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:17,522 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-11-06 18:37:17,522 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348808627] [2019-11-06 18:37:17,523 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502674498] [2019-11-06 18:37:17,523 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:37:18,310 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2019-11-06 18:37:18,310 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:37:18,313 INFO L256 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-06 18:37:18,316 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:37:18,428 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 172 proven. 36 refuted. 0 times theorem prover too weak. 481 trivial. 0 not checked. [2019-11-06 18:37:18,428 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:37:18,428 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 9] total 28 [2019-11-06 18:37:18,428 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506285141] [2019-11-06 18:37:18,430 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-06 18:37:18,430 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:37:18,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-06 18:37:18,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=529, Unknown=0, NotChecked=0, Total=756 [2019-11-06 18:37:18,431 INFO L87 Difference]: Start difference. First operand 79 states and 83 transitions. Second operand 28 states. [2019-11-06 18:37:18,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:37:18,800 INFO L93 Difference]: Finished difference Result 123 states and 135 transitions. [2019-11-06 18:37:18,801 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-06 18:37:18,801 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 112 [2019-11-06 18:37:18,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:37:18,802 INFO L225 Difference]: With dead ends: 123 [2019-11-06 18:37:18,802 INFO L226 Difference]: Without dead ends: 85 [2019-11-06 18:37:18,803 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=297, Invalid=893, Unknown=0, NotChecked=0, Total=1190 [2019-11-06 18:37:18,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-11-06 18:37:18,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 83. [2019-11-06 18:37:18,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-11-06 18:37:18,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 87 transitions. [2019-11-06 18:37:18,810 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 87 transitions. Word has length 112 [2019-11-06 18:37:18,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:37:18,813 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 87 transitions. [2019-11-06 18:37:18,813 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-06 18:37:18,813 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 87 transitions. [2019-11-06 18:37:18,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-11-06 18:37:18,814 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:37:18,814 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 18, 18, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:37:19,024 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:37:19,025 INFO L410 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:37:19,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:37:19,025 INFO L82 PathProgramCache]: Analyzing trace with hash 112259767, now seen corresponding path program 18 times [2019-11-06 18:37:19,025 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:37:19,026 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965913323] [2019-11-06 18:37:19,026 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:37:19,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:19,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:19,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:19,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:19,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:19,326 INFO L134 CoverageAnalysis]: Checked inductivity of 847 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 523 trivial. 0 not checked. [2019-11-06 18:37:19,327 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965913323] [2019-11-06 18:37:19,327 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722029561] [2019-11-06 18:37:19,327 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2019-11-06 18:37:19,964 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-11-06 18:37:19,964 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:37:19,967 INFO L256 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 18:37:19,969 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:37:20,052 INFO L134 CoverageAnalysis]: Checked inductivity of 847 backedges. 234 proven. 25 refuted. 0 times theorem prover too weak. 588 trivial. 0 not checked. [2019-11-06 18:37:20,053 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:37:20,053 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 8] total 28 [2019-11-06 18:37:20,053 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859092084] [2019-11-06 18:37:20,054 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-06 18:37:20,054 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:37:20,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-06 18:37:20,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=517, Unknown=0, NotChecked=0, Total=756 [2019-11-06 18:37:20,055 INFO L87 Difference]: Start difference. First operand 83 states and 87 transitions. Second operand 28 states. [2019-11-06 18:37:20,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:37:20,313 INFO L93 Difference]: Finished difference Result 129 states and 138 transitions. [2019-11-06 18:37:20,316 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-06 18:37:20,316 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 120 [2019-11-06 18:37:20,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:37:20,317 INFO L225 Difference]: With dead ends: 129 [2019-11-06 18:37:20,318 INFO L226 Difference]: Without dead ends: 89 [2019-11-06 18:37:20,319 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=239, Invalid=517, Unknown=0, NotChecked=0, Total=756 [2019-11-06 18:37:20,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-11-06 18:37:20,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 87. [2019-11-06 18:37:20,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-11-06 18:37:20,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 91 transitions. [2019-11-06 18:37:20,328 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 91 transitions. Word has length 120 [2019-11-06 18:37:20,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:37:20,329 INFO L462 AbstractCegarLoop]: Abstraction has 87 states and 91 transitions. [2019-11-06 18:37:20,329 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-06 18:37:20,329 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 91 transitions. [2019-11-06 18:37:20,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-11-06 18:37:20,331 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:37:20,331 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 19, 19, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:37:20,536 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:37:20,536 INFO L410 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:37:20,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:37:20,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1045212439, now seen corresponding path program 19 times [2019-11-06 18:37:20,537 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:37:20,537 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222502769] [2019-11-06 18:37:20,537 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:37:20,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:20,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:20,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:20,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:20,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:20,843 INFO L134 CoverageAnalysis]: Checked inductivity of 895 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2019-11-06 18:37:20,843 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222502769] [2019-11-06 18:37:20,844 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742093153] [2019-11-06 18:37:20,844 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2019-11-06 18:37:20,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:20,932 INFO L256 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-06 18:37:20,934 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:37:20,961 INFO L134 CoverageAnalysis]: Checked inductivity of 895 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2019-11-06 18:37:20,962 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:37:20,962 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 24 [2019-11-06 18:37:20,962 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409027541] [2019-11-06 18:37:20,963 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-06 18:37:20,963 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:37:20,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-06 18:37:20,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2019-11-06 18:37:20,963 INFO L87 Difference]: Start difference. First operand 87 states and 91 transitions. Second operand 24 states. [2019-11-06 18:37:21,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:37:21,108 INFO L93 Difference]: Finished difference Result 132 states and 140 transitions. [2019-11-06 18:37:21,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-06 18:37:21,108 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 124 [2019-11-06 18:37:21,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:37:21,109 INFO L225 Difference]: With dead ends: 132 [2019-11-06 18:37:21,109 INFO L226 Difference]: Without dead ends: 90 [2019-11-06 18:37:21,109 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2019-11-06 18:37:21,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-11-06 18:37:21,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2019-11-06 18:37:21,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-11-06 18:37:21,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 93 transitions. [2019-11-06 18:37:21,113 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 93 transitions. Word has length 124 [2019-11-06 18:37:21,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:37:21,114 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 93 transitions. [2019-11-06 18:37:21,114 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-06 18:37:21,114 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 93 transitions. [2019-11-06 18:37:21,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-11-06 18:37:21,115 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:37:21,115 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:37:21,318 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:37:21,318 INFO L410 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:37:21,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:37:21,319 INFO L82 PathProgramCache]: Analyzing trace with hash 514208377, now seen corresponding path program 20 times [2019-11-06 18:37:21,319 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:37:21,320 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934079330] [2019-11-06 18:37:21,320 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:37:21,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:21,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:21,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:21,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:21,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:21,679 INFO L134 CoverageAnalysis]: Checked inductivity of 934 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2019-11-06 18:37:21,679 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934079330] [2019-11-06 18:37:21,679 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381865895] [2019-11-06 18:37:21,680 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:37:21,811 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:37:21,812 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:37:21,814 INFO L256 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-06 18:37:21,818 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:37:21,871 INFO L134 CoverageAnalysis]: Checked inductivity of 934 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2019-11-06 18:37:21,871 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:37:21,871 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2019-11-06 18:37:21,872 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120399013] [2019-11-06 18:37:21,872 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-06 18:37:21,873 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:37:21,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-06 18:37:21,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2019-11-06 18:37:21,874 INFO L87 Difference]: Start difference. First operand 89 states and 93 transitions. Second operand 25 states. [2019-11-06 18:37:22,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:37:22,075 INFO L93 Difference]: Finished difference Result 134 states and 142 transitions. [2019-11-06 18:37:22,076 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-06 18:37:22,076 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 126 [2019-11-06 18:37:22,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:37:22,076 INFO L225 Difference]: With dead ends: 134 [2019-11-06 18:37:22,077 INFO L226 Difference]: Without dead ends: 92 [2019-11-06 18:37:22,077 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2019-11-06 18:37:22,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-11-06 18:37:22,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2019-11-06 18:37:22,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-11-06 18:37:22,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 95 transitions. [2019-11-06 18:37:22,082 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 95 transitions. Word has length 126 [2019-11-06 18:37:22,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:37:22,082 INFO L462 AbstractCegarLoop]: Abstraction has 91 states and 95 transitions. [2019-11-06 18:37:22,082 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-06 18:37:22,082 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 95 transitions. [2019-11-06 18:37:22,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2019-11-06 18:37:22,083 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:37:22,083 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:37:22,287 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:37:22,287 INFO L410 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:37:22,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:37:22,288 INFO L82 PathProgramCache]: Analyzing trace with hash 1320413019, now seen corresponding path program 21 times [2019-11-06 18:37:22,288 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:37:22,288 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531298552] [2019-11-06 18:37:22,288 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:37:22,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:22,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:22,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:22,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:22,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:22,621 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2019-11-06 18:37:22,622 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531298552] [2019-11-06 18:37:22,622 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103902116] [2019-11-06 18:37:22,622 INFO L92 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 [2019-11-06 18:37:22,808 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-11-06 18:37:22,809 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:37:22,810 INFO L256 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-06 18:37:22,812 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:37:22,948 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 234 proven. 36 refuted. 0 times theorem prover too weak. 705 trivial. 0 not checked. [2019-11-06 18:37:22,948 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:37:22,948 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 9] total 32 [2019-11-06 18:37:22,949 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470020523] [2019-11-06 18:37:22,950 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-11-06 18:37:22,950 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:37:22,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-11-06 18:37:22,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=679, Unknown=0, NotChecked=0, Total=992 [2019-11-06 18:37:22,951 INFO L87 Difference]: Start difference. First operand 91 states and 95 transitions. Second operand 32 states. [2019-11-06 18:37:23,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:37:23,261 INFO L93 Difference]: Finished difference Result 139 states and 148 transitions. [2019-11-06 18:37:23,262 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-11-06 18:37:23,262 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 128 [2019-11-06 18:37:23,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:37:23,262 INFO L225 Difference]: With dead ends: 139 [2019-11-06 18:37:23,263 INFO L226 Difference]: Without dead ends: 97 [2019-11-06 18:37:23,263 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=313, Invalid=679, Unknown=0, NotChecked=0, Total=992 [2019-11-06 18:37:23,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-11-06 18:37:23,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2019-11-06 18:37:23,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2019-11-06 18:37:23,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 99 transitions. [2019-11-06 18:37:23,268 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 99 transitions. Word has length 128 [2019-11-06 18:37:23,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:37:23,269 INFO L462 AbstractCegarLoop]: Abstraction has 95 states and 99 transitions. [2019-11-06 18:37:23,269 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-11-06 18:37:23,269 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 99 transitions. [2019-11-06 18:37:23,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-11-06 18:37:23,270 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:37:23,270 INFO L410 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:37:23,473 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:37:23,473 INFO L410 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:37:23,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:37:23,474 INFO L82 PathProgramCache]: Analyzing trace with hash -309721413, now seen corresponding path program 22 times [2019-11-06 18:37:23,474 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:37:23,474 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134347217] [2019-11-06 18:37:23,474 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:37:23,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:23,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:23,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:23,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:23,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:23,841 INFO L134 CoverageAnalysis]: Checked inductivity of 1031 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 547 trivial. 0 not checked. [2019-11-06 18:37:23,841 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134347217] [2019-11-06 18:37:23,842 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684767662] [2019-11-06 18:37:23,842 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2019-11-06 18:37:23,966 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:37:23,966 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:37:23,969 INFO L256 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-06 18:37:23,973 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:37:24,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1031 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 547 trivial. 0 not checked. [2019-11-06 18:37:24,023 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:37:24,024 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 27 [2019-11-06 18:37:24,024 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144709375] [2019-11-06 18:37:24,024 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-06 18:37:24,025 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:37:24,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-06 18:37:24,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2019-11-06 18:37:24,026 INFO L87 Difference]: Start difference. First operand 95 states and 99 transitions. Second operand 27 states. [2019-11-06 18:37:24,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:37:24,269 INFO L93 Difference]: Finished difference Result 142 states and 150 transitions. [2019-11-06 18:37:24,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-11-06 18:37:24,269 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 132 [2019-11-06 18:37:24,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:37:24,270 INFO L225 Difference]: With dead ends: 142 [2019-11-06 18:37:24,270 INFO L226 Difference]: Without dead ends: 98 [2019-11-06 18:37:24,271 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2019-11-06 18:37:24,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-11-06 18:37:24,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2019-11-06 18:37:24,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-11-06 18:37:24,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 101 transitions. [2019-11-06 18:37:24,275 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 101 transitions. Word has length 132 [2019-11-06 18:37:24,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:37:24,276 INFO L462 AbstractCegarLoop]: Abstraction has 97 states and 101 transitions. [2019-11-06 18:37:24,276 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-06 18:37:24,276 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 101 transitions. [2019-11-06 18:37:24,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-11-06 18:37:24,277 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:37:24,277 INFO L410 BasicCegarLoop]: trace histogram [23, 23, 21, 21, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:37:24,481 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:37:24,481 INFO L410 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:37:24,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:37:24,482 INFO L82 PathProgramCache]: Analyzing trace with hash -1262417379, now seen corresponding path program 23 times [2019-11-06 18:37:24,482 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:37:24,482 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118859612] [2019-11-06 18:37:24,483 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:37:24,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:24,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:24,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:24,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:24,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:24,999 INFO L134 CoverageAnalysis]: Checked inductivity of 1076 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 547 trivial. 0 not checked. [2019-11-06 18:37:24,999 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118859612] [2019-11-06 18:37:24,999 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720498344] [2019-11-06 18:37:25,000 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:37:27,575 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2019-11-06 18:37:27,575 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:37:27,581 INFO L256 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-06 18:37:27,583 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:37:27,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1076 backedges. 228 proven. 49 refuted. 0 times theorem prover too weak. 799 trivial. 0 not checked. [2019-11-06 18:37:27,791 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:37:27,791 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 10] total 35 [2019-11-06 18:37:27,792 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287276969] [2019-11-06 18:37:27,792 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-06 18:37:27,792 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:37:27,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-06 18:37:27,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=819, Unknown=0, NotChecked=0, Total=1190 [2019-11-06 18:37:27,794 INFO L87 Difference]: Start difference. First operand 97 states and 101 transitions. Second operand 35 states. [2019-11-06 18:37:28,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:37:28,355 INFO L93 Difference]: Finished difference Result 147 states and 159 transitions. [2019-11-06 18:37:28,356 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-11-06 18:37:28,356 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 134 [2019-11-06 18:37:28,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:37:28,357 INFO L225 Difference]: With dead ends: 147 [2019-11-06 18:37:28,357 INFO L226 Difference]: Without dead ends: 103 [2019-11-06 18:37:28,359 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=459, Invalid=1347, Unknown=0, NotChecked=0, Total=1806 [2019-11-06 18:37:28,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-11-06 18:37:28,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 101. [2019-11-06 18:37:28,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-11-06 18:37:28,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 105 transitions. [2019-11-06 18:37:28,365 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 105 transitions. Word has length 134 [2019-11-06 18:37:28,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:37:28,366 INFO L462 AbstractCegarLoop]: Abstraction has 101 states and 105 transitions. [2019-11-06 18:37:28,366 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-11-06 18:37:28,366 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 105 transitions. [2019-11-06 18:37:28,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-11-06 18:37:28,370 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:37:28,371 INFO L410 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:37:28,578 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:37:28,579 INFO L410 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:37:28,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:37:28,579 INFO L82 PathProgramCache]: Analyzing trace with hash -1174350115, now seen corresponding path program 24 times [2019-11-06 18:37:28,580 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:37:28,580 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919211632] [2019-11-06 18:37:28,580 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:37:28,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:28,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:28,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:28,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:28,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:29,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2019-11-06 18:37:29,013 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919211632] [2019-11-06 18:37:29,014 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199106172] [2019-11-06 18:37:29,014 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2019-11-06 18:37:30,141 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2019-11-06 18:37:30,142 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:37:30,144 INFO L256 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-06 18:37:30,146 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:37:30,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 298 proven. 49 refuted. 0 times theorem prover too weak. 917 trivial. 0 not checked. [2019-11-06 18:37:30,290 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:37:30,290 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 10] total 36 [2019-11-06 18:37:30,290 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460608508] [2019-11-06 18:37:30,290 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-11-06 18:37:30,290 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:37:30,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-11-06 18:37:30,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=397, Invalid=863, Unknown=0, NotChecked=0, Total=1260 [2019-11-06 18:37:30,291 INFO L87 Difference]: Start difference. First operand 101 states and 105 transitions. Second operand 36 states. [2019-11-06 18:37:30,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:37:30,608 INFO L93 Difference]: Finished difference Result 153 states and 162 transitions. [2019-11-06 18:37:30,608 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-11-06 18:37:30,609 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 142 [2019-11-06 18:37:30,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:37:30,610 INFO L225 Difference]: With dead ends: 153 [2019-11-06 18:37:30,610 INFO L226 Difference]: Without dead ends: 107 [2019-11-06 18:37:30,612 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=397, Invalid=863, Unknown=0, NotChecked=0, Total=1260 [2019-11-06 18:37:30,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-11-06 18:37:30,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 105. [2019-11-06 18:37:30,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2019-11-06 18:37:30,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 109 transitions. [2019-11-06 18:37:30,617 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 109 transitions. Word has length 142 [2019-11-06 18:37:30,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:37:30,617 INFO L462 AbstractCegarLoop]: Abstraction has 105 states and 109 transitions. [2019-11-06 18:37:30,617 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-11-06 18:37:30,617 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 109 transitions. [2019-11-06 18:37:30,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-11-06 18:37:30,618 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:37:30,618 INFO L410 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:37:30,823 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:37:30,824 INFO L410 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:37:30,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:37:30,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1716964803, now seen corresponding path program 25 times [2019-11-06 18:37:30,825 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:37:30,825 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831803583] [2019-11-06 18:37:30,826 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:37:30,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:31,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:31,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:31,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:31,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:31,219 INFO L134 CoverageAnalysis]: Checked inductivity of 1328 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2019-11-06 18:37:31,220 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831803583] [2019-11-06 18:37:31,220 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356212931] [2019-11-06 18:37:31,220 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2019-11-06 18:37:31,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:31,333 INFO L256 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 27 conjunts are in the unsatisfiable core [2019-11-06 18:37:31,335 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:37:31,364 INFO L134 CoverageAnalysis]: Checked inductivity of 1328 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2019-11-06 18:37:31,364 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:37:31,365 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 30 [2019-11-06 18:37:31,365 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880524607] [2019-11-06 18:37:31,365 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-11-06 18:37:31,365 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:37:31,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-11-06 18:37:31,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2019-11-06 18:37:31,366 INFO L87 Difference]: Start difference. First operand 105 states and 109 transitions. Second operand 30 states. [2019-11-06 18:37:31,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:37:31,582 INFO L93 Difference]: Finished difference Result 156 states and 164 transitions. [2019-11-06 18:37:31,582 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-11-06 18:37:31,582 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 146 [2019-11-06 18:37:31,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:37:31,583 INFO L225 Difference]: With dead ends: 156 [2019-11-06 18:37:31,584 INFO L226 Difference]: Without dead ends: 108 [2019-11-06 18:37:31,585 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2019-11-06 18:37:31,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2019-11-06 18:37:31,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2019-11-06 18:37:31,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2019-11-06 18:37:31,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 111 transitions. [2019-11-06 18:37:31,590 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 111 transitions. Word has length 146 [2019-11-06 18:37:31,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:37:31,590 INFO L462 AbstractCegarLoop]: Abstraction has 107 states and 111 transitions. [2019-11-06 18:37:31,590 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-11-06 18:37:31,590 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 111 transitions. [2019-11-06 18:37:31,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2019-11-06 18:37:31,591 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:37:31,592 INFO L410 BasicCegarLoop]: trace histogram [26, 26, 24, 24, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:37:31,795 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:37:31,795 INFO L410 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:37:31,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:37:31,796 INFO L82 PathProgramCache]: Analyzing trace with hash -321019361, now seen corresponding path program 26 times [2019-11-06 18:37:31,796 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:37:31,796 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546131190] [2019-11-06 18:37:31,797 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:37:31,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:32,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:32,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:32,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:32,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:32,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1379 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2019-11-06 18:37:32,206 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546131190] [2019-11-06 18:37:32,207 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761924490] [2019-11-06 18:37:32,207 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_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 [2019-11-06 18:37:32,353 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:37:32,354 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:37:32,355 INFO L256 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-06 18:37:32,359 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:37:32,400 INFO L134 CoverageAnalysis]: Checked inductivity of 1379 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2019-11-06 18:37:32,401 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:37:32,401 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 31 [2019-11-06 18:37:32,402 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103766760] [2019-11-06 18:37:32,402 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-11-06 18:37:32,402 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:37:32,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-11-06 18:37:32,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2019-11-06 18:37:32,403 INFO L87 Difference]: Start difference. First operand 107 states and 111 transitions. Second operand 31 states. [2019-11-06 18:37:32,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:37:32,601 INFO L93 Difference]: Finished difference Result 158 states and 166 transitions. [2019-11-06 18:37:32,601 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-11-06 18:37:32,601 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 148 [2019-11-06 18:37:32,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:37:32,603 INFO L225 Difference]: With dead ends: 158 [2019-11-06 18:37:32,603 INFO L226 Difference]: Without dead ends: 110 [2019-11-06 18:37:32,604 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2019-11-06 18:37:32,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2019-11-06 18:37:32,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2019-11-06 18:37:32,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2019-11-06 18:37:32,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 113 transitions. [2019-11-06 18:37:32,613 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 113 transitions. Word has length 148 [2019-11-06 18:37:32,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:37:32,613 INFO L462 AbstractCegarLoop]: Abstraction has 109 states and 113 transitions. [2019-11-06 18:37:32,614 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-11-06 18:37:32,614 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 113 transitions. [2019-11-06 18:37:32,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2019-11-06 18:37:32,615 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:37:32,615 INFO L410 BasicCegarLoop]: trace histogram [27, 27, 24, 24, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:37:32,820 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:37:32,820 INFO L410 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:37:32,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:37:32,820 INFO L82 PathProgramCache]: Analyzing trace with hash 1152754049, now seen corresponding path program 27 times [2019-11-06 18:37:32,821 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:37:32,821 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999068359] [2019-11-06 18:37:32,821 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:37:32,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:33,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:33,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:33,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:33,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:33,238 INFO L134 CoverageAnalysis]: Checked inductivity of 1432 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2019-11-06 18:37:33,238 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999068359] [2019-11-06 18:37:33,238 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504425292] [2019-11-06 18:37:33,239 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2019-11-06 18:37:33,469 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-11-06 18:37:33,469 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:37:33,471 INFO L256 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-06 18:37:33,475 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:37:33,817 INFO L134 CoverageAnalysis]: Checked inductivity of 1432 backedges. 296 proven. 64 refuted. 0 times theorem prover too weak. 1072 trivial. 0 not checked. [2019-11-06 18:37:33,817 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:37:33,817 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 11] total 40 [2019-11-06 18:37:33,818 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594113662] [2019-11-06 18:37:33,819 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-11-06 18:37:33,819 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:37:33,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-11-06 18:37:33,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=491, Invalid=1069, Unknown=0, NotChecked=0, Total=1560 [2019-11-06 18:37:33,821 INFO L87 Difference]: Start difference. First operand 109 states and 113 transitions. Second operand 40 states. [2019-11-06 18:37:34,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:37:34,493 INFO L93 Difference]: Finished difference Result 163 states and 175 transitions. [2019-11-06 18:37:34,493 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-11-06 18:37:34,493 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 150 [2019-11-06 18:37:34,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:37:34,494 INFO L225 Difference]: With dead ends: 163 [2019-11-06 18:37:34,494 INFO L226 Difference]: Without dead ends: 115 [2019-11-06 18:37:34,495 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=599, Invalid=1753, Unknown=0, NotChecked=0, Total=2352 [2019-11-06 18:37:34,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-11-06 18:37:34,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 113. [2019-11-06 18:37:34,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-11-06 18:37:34,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 117 transitions. [2019-11-06 18:37:34,499 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 117 transitions. Word has length 150 [2019-11-06 18:37:34,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:37:34,499 INFO L462 AbstractCegarLoop]: Abstraction has 113 states and 117 transitions. [2019-11-06 18:37:34,499 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-11-06 18:37:34,500 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 117 transitions. [2019-11-06 18:37:34,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2019-11-06 18:37:34,501 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:37:34,501 INFO L410 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:37:34,705 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:37:34,705 INFO L410 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:37:34,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:37:34,706 INFO L82 PathProgramCache]: Analyzing trace with hash -1824133567, now seen corresponding path program 28 times [2019-11-06 18:37:34,707 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:37:34,707 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942042193] [2019-11-06 18:37:34,707 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:37:34,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:35,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:35,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:35,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:35,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:35,253 INFO L134 CoverageAnalysis]: Checked inductivity of 1646 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 862 trivial. 0 not checked. [2019-11-06 18:37:35,254 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942042193] [2019-11-06 18:37:35,254 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396664908] [2019-11-06 18:37:35,254 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2019-11-06 18:37:35,379 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:37:35,380 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:37:35,381 INFO L256 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-06 18:37:35,384 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:37:35,703 INFO L134 CoverageAnalysis]: Checked inductivity of 1646 backedges. 368 proven. 81 refuted. 0 times theorem prover too weak. 1197 trivial. 0 not checked. [2019-11-06 18:37:35,704 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:37:35,704 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 12] total 42 [2019-11-06 18:37:35,705 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181633434] [2019-11-06 18:37:35,705 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-11-06 18:37:35,706 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:37:35,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-11-06 18:37:35,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=532, Invalid=1190, Unknown=0, NotChecked=0, Total=1722 [2019-11-06 18:37:35,708 INFO L87 Difference]: Start difference. First operand 113 states and 117 transitions. Second operand 42 states. [2019-11-06 18:37:36,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:37:36,383 INFO L93 Difference]: Finished difference Result 169 states and 181 transitions. [2019-11-06 18:37:36,384 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-11-06 18:37:36,384 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 158 [2019-11-06 18:37:36,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:37:36,385 INFO L225 Difference]: With dead ends: 169 [2019-11-06 18:37:36,385 INFO L226 Difference]: Without dead ends: 119 [2019-11-06 18:37:36,387 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=662, Invalid=1990, Unknown=0, NotChecked=0, Total=2652 [2019-11-06 18:37:36,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2019-11-06 18:37:36,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 117. [2019-11-06 18:37:36,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-11-06 18:37:36,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 121 transitions. [2019-11-06 18:37:36,397 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 121 transitions. Word has length 158 [2019-11-06 18:37:36,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:37:36,398 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 121 transitions. [2019-11-06 18:37:36,398 INFO L463 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-11-06 18:37:36,398 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 121 transitions. [2019-11-06 18:37:36,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-11-06 18:37:36,399 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:37:36,400 INFO L410 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:37:36,604 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:37:36,604 INFO L410 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:37:36,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:37:36,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1177458431, now seen corresponding path program 29 times [2019-11-06 18:37:36,605 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:37:36,605 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504355404] [2019-11-06 18:37:36,605 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:37:36,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:37,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:37,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:37,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:37,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:37:37,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1880 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 1039 trivial. 0 not checked. [2019-11-06 18:37:37,074 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504355404] [2019-11-06 18:37:37,074 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832640234] [2019-11-06 18:37:37,075 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_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