/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/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/standard_two_index_04.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:35:22,301 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:35:22,304 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:35:22,324 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:35:22,324 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:35:22,326 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:35:22,328 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:35:22,340 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:35:22,343 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:35:22,344 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:35:22,347 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:35:22,349 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:35:22,349 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:35:22,353 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:35:22,356 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:35:22,357 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:35:22,359 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:35:22,361 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:35:22,362 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:35:22,367 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:35:22,372 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:35:22,375 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:35:22,377 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:35:22,378 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:35:22,381 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 20:35:22,393 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:35:22,395 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:35:22,396 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:35:22,397 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 [2019-11-23 20:35:22,416 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:35:22,416 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:35:22,418 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:35:22,419 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:35:22,419 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:35:22,420 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:35:22,420 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:35:22,420 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:35:22,420 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:35:22,420 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:35:22,422 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:35:22,422 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:35:22,422 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:35:22,422 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:35:22,423 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:35:22,423 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:35:22,423 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:35:22,423 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:35:22,424 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:35:22,424 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:35:22,424 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:35:22,424 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:35:22,424 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:35:22,425 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:35:22,425 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:35:22,425 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:35:22,425 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:35:22,425 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:35:22,426 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:35:22,426 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:35:22,692 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:35:22,706 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:35:22,709 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:35:22,711 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:35:22,711 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:35:22,712 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_two_index_04.i [2019-11-23 20:35:22,780 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aaf3191d4/5ac50b83b744471490d4390e97a96757/FLAGbd7252537 [2019-11-23 20:35:23,218 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:35:23,219 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_two_index_04.i [2019-11-23 20:35:23,225 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aaf3191d4/5ac50b83b744471490d4390e97a96757/FLAGbd7252537 [2019-11-23 20:35:23,655 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aaf3191d4/5ac50b83b744471490d4390e97a96757 [2019-11-23 20:35:23,666 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:35:23,668 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:35:23,672 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:35:23,672 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:35:23,676 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:35:23,677 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:35:23" (1/1) ... [2019-11-23 20:35:23,680 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18c1a41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:23, skipping insertion in model container [2019-11-23 20:35:23,680 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:35:23" (1/1) ... [2019-11-23 20:35:23,689 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:35:23,710 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:35:23,898 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:35:23,902 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:35:23,931 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:35:23,949 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:35:23,950 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:23 WrapperNode [2019-11-23 20:35:23,950 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:35:23,951 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:35:23,951 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:35:23,951 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:35:23,958 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:23" (1/1) ... [2019-11-23 20:35:24,046 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:23" (1/1) ... [2019-11-23 20:35:24,068 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:35:24,068 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:35:24,068 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:35:24,069 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:35:24,078 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:23" (1/1) ... [2019-11-23 20:35:24,078 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:23" (1/1) ... [2019-11-23 20:35:24,080 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:23" (1/1) ... [2019-11-23 20:35:24,080 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:23" (1/1) ... [2019-11-23 20:35:24,086 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:23" (1/1) ... [2019-11-23 20:35:24,091 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:23" (1/1) ... [2019-11-23 20:35:24,092 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:23" (1/1) ... [2019-11-23 20:35:24,094 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:35:24,095 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:35:24,095 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:35:24,095 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:35:24,098 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:23" (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 [2019-11-23 20:35:24,161 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:35:24,162 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:35:24,162 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:35:24,162 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:35:24,162 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:35:24,163 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:35:24,415 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:35:24,415 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-23 20:35:24,417 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:35:24 BoogieIcfgContainer [2019-11-23 20:35:24,417 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:35:24,423 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:35:24,423 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:35:24,431 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:35:24,431 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:35:23" (1/3) ... [2019-11-23 20:35:24,434 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18c778ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:35:24, skipping insertion in model container [2019-11-23 20:35:24,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:23" (2/3) ... [2019-11-23 20:35:24,435 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18c778ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:35:24, skipping insertion in model container [2019-11-23 20:35:24,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:35:24" (3/3) ... [2019-11-23 20:35:24,441 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_two_index_04.i [2019-11-23 20:35:24,463 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:35:24,471 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:35:24,482 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:35:24,505 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:35:24,505 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:35:24,505 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:35:24,506 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:35:24,506 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:35:24,506 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:35:24,506 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:35:24,506 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:35:24,518 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2019-11-23 20:35:24,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-23 20:35:24,525 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:24,526 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:24,526 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:24,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:24,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1157635880, now seen corresponding path program 1 times [2019-11-23 20:35:24,540 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:24,540 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778103080] [2019-11-23 20:35:24,541 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:24,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:24,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:35:24,704 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778103080] [2019-11-23 20:35:24,705 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:35:24,705 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:35:24,706 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730187246] [2019-11-23 20:35:24,711 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:35:24,711 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:24,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:35:24,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:35:24,724 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 3 states. [2019-11-23 20:35:24,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:24,773 INFO L93 Difference]: Finished difference Result 28 states and 40 transitions. [2019-11-23 20:35:24,774 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:35:24,775 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2019-11-23 20:35:24,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:24,785 INFO L225 Difference]: With dead ends: 28 [2019-11-23 20:35:24,785 INFO L226 Difference]: Without dead ends: 12 [2019-11-23 20:35:24,788 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:35:24,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-11-23 20:35:24,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-11-23 20:35:24,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-11-23 20:35:24,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2019-11-23 20:35:24,821 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 9 [2019-11-23 20:35:24,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:24,822 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2019-11-23 20:35:24,822 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:35:24,822 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2019-11-23 20:35:24,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-23 20:35:24,823 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:24,823 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:24,824 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:24,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:24,824 INFO L82 PathProgramCache]: Analyzing trace with hash 722375763, now seen corresponding path program 1 times [2019-11-23 20:35:24,825 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:24,825 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062295019] [2019-11-23 20:35:24,825 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:24,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:24,875 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:35:24,876 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062295019] [2019-11-23 20:35:24,876 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:35:24,876 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:35:24,877 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476622718] [2019-11-23 20:35:24,878 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:35:24,879 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:24,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:35:24,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:35:24,880 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand 3 states. [2019-11-23 20:35:24,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:24,926 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2019-11-23 20:35:24,927 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:35:24,927 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-11-23 20:35:24,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:24,928 INFO L225 Difference]: With dead ends: 24 [2019-11-23 20:35:24,928 INFO L226 Difference]: Without dead ends: 18 [2019-11-23 20:35:24,929 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:35:24,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-23 20:35:24,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 13. [2019-11-23 20:35:24,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-11-23 20:35:24,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2019-11-23 20:35:24,934 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 10 [2019-11-23 20:35:24,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:24,934 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2019-11-23 20:35:24,934 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:35:24,934 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2019-11-23 20:35:24,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-23 20:35:24,935 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:24,935 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:24,936 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:24,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:24,936 INFO L82 PathProgramCache]: Analyzing trace with hash 970258327, now seen corresponding path program 1 times [2019-11-23 20:35:24,936 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:24,937 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237152323] [2019-11-23 20:35:24,937 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:24,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:25,021 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:35:25,021 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237152323] [2019-11-23 20:35:25,023 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877883210] [2019-11-23 20:35:25,023 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 [2019-11-23 20:35:25,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:25,085 INFO L255 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:35:25,091 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:25,124 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:35:25,125 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:25,125 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2019-11-23 20:35:25,126 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369996769] [2019-11-23 20:35:25,126 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 20:35:25,126 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:25,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 20:35:25,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:35:25,127 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand 6 states. [2019-11-23 20:35:25,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:25,206 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2019-11-23 20:35:25,206 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 20:35:25,207 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2019-11-23 20:35:25,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:25,208 INFO L225 Difference]: With dead ends: 35 [2019-11-23 20:35:25,208 INFO L226 Difference]: Without dead ends: 26 [2019-11-23 20:35:25,208 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:35:25,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-23 20:35:25,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 16. [2019-11-23 20:35:25,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-11-23 20:35:25,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2019-11-23 20:35:25,214 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 11 [2019-11-23 20:35:25,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:25,214 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2019-11-23 20:35:25,214 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 20:35:25,215 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2019-11-23 20:35:25,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-23 20:35:25,215 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:25,215 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:25,419 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:25,419 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:25,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:25,420 INFO L82 PathProgramCache]: Analyzing trace with hash -588918413, now seen corresponding path program 2 times [2019-11-23 20:35:25,420 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:25,420 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029253185] [2019-11-23 20:35:25,420 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:25,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:25,501 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-23 20:35:25,503 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029253185] [2019-11-23 20:35:25,503 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67084765] [2019-11-23 20:35:25,503 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 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 [2019-11-23 20:35:25,549 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:35:25,549 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:25,550 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:35:25,551 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:25,600 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-23 20:35:25,601 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:25,601 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2019-11-23 20:35:25,602 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247770497] [2019-11-23 20:35:25,602 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 20:35:25,602 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:25,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 20:35:25,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=37, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:35:25,603 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 9 states. [2019-11-23 20:35:25,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:25,690 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2019-11-23 20:35:25,690 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 20:35:25,690 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2019-11-23 20:35:25,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:25,691 INFO L225 Difference]: With dead ends: 45 [2019-11-23 20:35:25,693 INFO L226 Difference]: Without dead ends: 35 [2019-11-23 20:35:25,694 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=37, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:35:25,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-23 20:35:25,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 20. [2019-11-23 20:35:25,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-23 20:35:25,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2019-11-23 20:35:25,706 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 14 [2019-11-23 20:35:25,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:25,706 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2019-11-23 20:35:25,707 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 20:35:25,710 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2019-11-23 20:35:25,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-23 20:35:25,711 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:25,711 INFO L410 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:25,913 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:25,914 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:25,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:25,915 INFO L82 PathProgramCache]: Analyzing trace with hash -825242030, now seen corresponding path program 3 times [2019-11-23 20:35:25,915 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:25,916 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380941007] [2019-11-23 20:35:25,916 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:25,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:26,065 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-23 20:35:26,066 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380941007] [2019-11-23 20:35:26,066 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941171759] [2019-11-23 20:35:26,067 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 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 [2019-11-23 20:35:26,124 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-23 20:35:26,125 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:26,125 INFO L255 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:35:26,126 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:26,138 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-23 20:35:26,138 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:26,138 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-11-23 20:35:26,139 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081614029] [2019-11-23 20:35:26,139 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 20:35:26,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:26,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 20:35:26,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:35:26,140 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 7 states. [2019-11-23 20:35:26,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:26,196 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2019-11-23 20:35:26,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 20:35:26,197 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2019-11-23 20:35:26,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:26,198 INFO L225 Difference]: With dead ends: 47 [2019-11-23 20:35:26,198 INFO L226 Difference]: Without dead ends: 41 [2019-11-23 20:35:26,199 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:35:26,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-23 20:35:26,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 21. [2019-11-23 20:35:26,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-23 20:35:26,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2019-11-23 20:35:26,205 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 18 [2019-11-23 20:35:26,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:26,205 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2019-11-23 20:35:26,205 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 20:35:26,206 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2019-11-23 20:35:26,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-23 20:35:26,206 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:26,206 INFO L410 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:26,410 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:26,410 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:26,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:26,411 INFO L82 PathProgramCache]: Analyzing trace with hash 238747000, now seen corresponding path program 4 times [2019-11-23 20:35:26,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:26,412 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378849842] [2019-11-23 20:35:26,413 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:26,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:26,496 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-23 20:35:26,497 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378849842] [2019-11-23 20:35:26,497 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214781327] [2019-11-23 20:35:26,498 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 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 [2019-11-23 20:35:26,539 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:35:26,539 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:26,540 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:35:26,543 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:26,614 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-23 20:35:26,615 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:26,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 13 [2019-11-23 20:35:26,616 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067450844] [2019-11-23 20:35:26,616 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 20:35:26,617 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:26,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 20:35:26,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=79, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:35:26,617 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 13 states. [2019-11-23 20:35:26,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:26,725 INFO L93 Difference]: Finished difference Result 63 states and 71 transitions. [2019-11-23 20:35:26,726 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 20:35:26,726 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 19 [2019-11-23 20:35:26,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:26,727 INFO L225 Difference]: With dead ends: 63 [2019-11-23 20:35:26,727 INFO L226 Difference]: Without dead ends: 51 [2019-11-23 20:35:26,728 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=77, Invalid=79, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:35:26,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-11-23 20:35:26,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 26. [2019-11-23 20:35:26,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-23 20:35:26,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2019-11-23 20:35:26,741 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 19 [2019-11-23 20:35:26,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:26,741 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2019-11-23 20:35:26,741 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 20:35:26,741 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2019-11-23 20:35:26,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-23 20:35:26,743 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:26,744 INFO L410 BasicCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:26,953 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:26,954 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:26,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:26,954 INFO L82 PathProgramCache]: Analyzing trace with hash 1232303186, now seen corresponding path program 5 times [2019-11-23 20:35:26,954 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:26,955 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396837697] [2019-11-23 20:35:26,955 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:26,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:27,086 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-11-23 20:35:27,087 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396837697] [2019-11-23 20:35:27,087 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240221206] [2019-11-23 20:35:27,087 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 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 [2019-11-23 20:35:27,247 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-23 20:35:27,247 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:27,250 INFO L255 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 20:35:27,252 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:27,332 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-23 20:35:27,333 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:27,333 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 13] total 17 [2019-11-23 20:35:27,333 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044335116] [2019-11-23 20:35:27,334 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-23 20:35:27,334 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:27,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-23 20:35:27,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=137, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:35:27,335 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 17 states. [2019-11-23 20:35:27,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:27,474 INFO L93 Difference]: Finished difference Result 74 states and 82 transitions. [2019-11-23 20:35:27,475 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-23 20:35:27,475 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 24 [2019-11-23 20:35:27,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:27,476 INFO L225 Difference]: With dead ends: 74 [2019-11-23 20:35:27,476 INFO L226 Difference]: Without dead ends: 61 [2019-11-23 20:35:27,477 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=137, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:35:27,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-11-23 20:35:27,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 31. [2019-11-23 20:35:27,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-11-23 20:35:27,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2019-11-23 20:35:27,484 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 24 [2019-11-23 20:35:27,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:27,484 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2019-11-23 20:35:27,484 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-23 20:35:27,485 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2019-11-23 20:35:27,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-23 20:35:27,486 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:27,486 INFO L410 BasicCegarLoop]: trace histogram [14, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:27,690 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:27,690 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:27,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:27,691 INFO L82 PathProgramCache]: Analyzing trace with hash -579527112, now seen corresponding path program 6 times [2019-11-23 20:35:27,691 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:27,691 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826932913] [2019-11-23 20:35:27,691 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:27,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:27,847 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2019-11-23 20:35:27,847 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826932913] [2019-11-23 20:35:27,848 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107911802] [2019-11-23 20:35:27,848 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 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 [2019-11-23 20:35:28,214 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-23 20:35:28,214 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:28,216 INFO L255 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:35:28,217 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:28,233 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2019-11-23 20:35:28,233 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:28,233 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-11-23 20:35:28,234 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449899522] [2019-11-23 20:35:28,234 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 20:35:28,234 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:28,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 20:35:28,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:35:28,235 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 10 states. [2019-11-23 20:35:28,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:28,316 INFO L93 Difference]: Finished difference Result 73 states and 76 transitions. [2019-11-23 20:35:28,317 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 20:35:28,317 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 29 [2019-11-23 20:35:28,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:28,318 INFO L225 Difference]: With dead ends: 73 [2019-11-23 20:35:28,318 INFO L226 Difference]: Without dead ends: 67 [2019-11-23 20:35:28,318 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:35:28,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-11-23 20:35:28,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 32. [2019-11-23 20:35:28,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-23 20:35:28,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2019-11-23 20:35:28,328 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 29 [2019-11-23 20:35:28,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:28,329 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2019-11-23 20:35:28,329 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 20:35:28,329 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2019-11-23 20:35:28,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-23 20:35:28,330 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:28,330 INFO L410 BasicCegarLoop]: trace histogram [14, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:28,531 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:28,531 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:28,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:28,532 INFO L82 PathProgramCache]: Analyzing trace with hash -734025134, now seen corresponding path program 7 times [2019-11-23 20:35:28,532 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:28,532 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879203637] [2019-11-23 20:35:28,532 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:28,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:28,629 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2019-11-23 20:35:28,630 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879203637] [2019-11-23 20:35:28,630 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739568526] [2019-11-23 20:35:28,630 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 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 [2019-11-23 20:35:28,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:28,687 INFO L255 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-23 20:35:28,690 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:28,806 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-23 20:35:28,807 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:28,807 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 17] total 22 [2019-11-23 20:35:28,807 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938813877] [2019-11-23 20:35:28,808 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-23 20:35:28,808 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:28,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-23 20:35:28,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=232, Unknown=0, NotChecked=0, Total=462 [2019-11-23 20:35:28,809 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 22 states. [2019-11-23 20:35:28,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:28,922 INFO L93 Difference]: Finished difference Result 93 states and 102 transitions. [2019-11-23 20:35:28,922 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-23 20:35:28,922 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 30 [2019-11-23 20:35:28,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:28,923 INFO L225 Difference]: With dead ends: 93 [2019-11-23 20:35:28,923 INFO L226 Difference]: Without dead ends: 78 [2019-11-23 20:35:28,924 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=230, Invalid=232, Unknown=0, NotChecked=0, Total=462 [2019-11-23 20:35:28,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-11-23 20:35:28,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 38. [2019-11-23 20:35:28,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-23 20:35:28,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2019-11-23 20:35:28,930 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 30 [2019-11-23 20:35:28,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:28,931 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2019-11-23 20:35:28,931 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-23 20:35:28,931 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2019-11-23 20:35:28,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-11-23 20:35:28,932 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:28,932 INFO L410 BasicCegarLoop]: trace histogram [19, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:29,135 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:29,136 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:29,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:29,137 INFO L82 PathProgramCache]: Analyzing trace with hash -558393357, now seen corresponding path program 8 times [2019-11-23 20:35:29,137 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:29,137 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601384091] [2019-11-23 20:35:29,137 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:29,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:29,281 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2019-11-23 20:35:29,282 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601384091] [2019-11-23 20:35:29,282 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729973487] [2019-11-23 20:35:29,282 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 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 [2019-11-23 20:35:29,343 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:35:29,343 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:29,344 INFO L255 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-23 20:35:29,346 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:29,484 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-23 20:35:29,485 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:29,485 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 22] total 27 [2019-11-23 20:35:29,485 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193468440] [2019-11-23 20:35:29,486 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-23 20:35:29,486 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:29,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-23 20:35:29,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=350, Invalid=352, Unknown=0, NotChecked=0, Total=702 [2019-11-23 20:35:29,487 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 27 states. [2019-11-23 20:35:29,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:29,642 INFO L93 Difference]: Finished difference Result 105 states and 114 transitions. [2019-11-23 20:35:29,642 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-11-23 20:35:29,642 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 36 [2019-11-23 20:35:29,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:29,643 INFO L225 Difference]: With dead ends: 105 [2019-11-23 20:35:29,645 INFO L226 Difference]: Without dead ends: 89 [2019-11-23 20:35:29,646 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=350, Invalid=352, Unknown=0, NotChecked=0, Total=702 [2019-11-23 20:35:29,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-11-23 20:35:29,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 44. [2019-11-23 20:35:29,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-23 20:35:29,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2019-11-23 20:35:29,658 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 36 [2019-11-23 20:35:29,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:29,658 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2019-11-23 20:35:29,658 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-23 20:35:29,658 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2019-11-23 20:35:29,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-11-23 20:35:29,659 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:29,659 INFO L410 BasicCegarLoop]: trace histogram [24, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:29,860 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:29,861 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:29,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:29,861 INFO L82 PathProgramCache]: Analyzing trace with hash 382424626, now seen corresponding path program 9 times [2019-11-23 20:35:29,862 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:29,862 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031728109] [2019-11-23 20:35:29,863 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:29,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:29,983 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2019-11-23 20:35:29,984 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031728109] [2019-11-23 20:35:29,984 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984843854] [2019-11-23 20:35:29,984 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 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 [2019-11-23 20:35:30,327 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-23 20:35:30,327 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:30,329 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-23 20:35:30,332 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:30,351 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2019-11-23 20:35:30,351 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:30,352 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-11-23 20:35:30,352 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410636707] [2019-11-23 20:35:30,352 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 20:35:30,353 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:30,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 20:35:30,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:35:30,353 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 13 states. [2019-11-23 20:35:30,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:30,443 INFO L93 Difference]: Finished difference Result 101 states and 104 transitions. [2019-11-23 20:35:30,444 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 20:35:30,444 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 42 [2019-11-23 20:35:30,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:30,445 INFO L225 Difference]: With dead ends: 101 [2019-11-23 20:35:30,445 INFO L226 Difference]: Without dead ends: 95 [2019-11-23 20:35:30,445 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:35:30,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2019-11-23 20:35:30,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 45. [2019-11-23 20:35:30,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-11-23 20:35:30,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2019-11-23 20:35:30,452 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 42 [2019-11-23 20:35:30,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:30,453 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2019-11-23 20:35:30,453 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 20:35:30,453 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2019-11-23 20:35:30,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-11-23 20:35:30,454 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:30,454 INFO L410 BasicCegarLoop]: trace histogram [24, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:30,666 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:30,666 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:30,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:30,667 INFO L82 PathProgramCache]: Analyzing trace with hash -978292328, now seen corresponding path program 10 times [2019-11-23 20:35:30,667 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:30,667 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823644972] [2019-11-23 20:35:30,668 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:30,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:30,845 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2019-11-23 20:35:30,846 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823644972] [2019-11-23 20:35:30,846 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195578961] [2019-11-23 20:35:30,846 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 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 [2019-11-23 20:35:30,924 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:35:30,925 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:35:30,927 INFO L255 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-23 20:35:30,938 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:35:31,124 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-11-23 20:35:31,125 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:35:31,125 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 27] total 33 [2019-11-23 20:35:31,126 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293083687] [2019-11-23 20:35:31,128 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-11-23 20:35:31,128 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:35:31,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-11-23 20:35:31,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=527, Invalid=529, Unknown=0, NotChecked=0, Total=1056 [2019-11-23 20:35:31,131 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 33 states. [2019-11-23 20:35:31,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:35:31,329 INFO L93 Difference]: Finished difference Result 125 states and 135 transitions. [2019-11-23 20:35:31,330 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-11-23 20:35:31,330 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 43 [2019-11-23 20:35:31,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:35:31,331 INFO L225 Difference]: With dead ends: 125 [2019-11-23 20:35:31,331 INFO L226 Difference]: Without dead ends: 107 [2019-11-23 20:35:31,333 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=527, Invalid=529, Unknown=0, NotChecked=0, Total=1056 [2019-11-23 20:35:31,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-11-23 20:35:31,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 52. [2019-11-23 20:35:31,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-11-23 20:35:31,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2019-11-23 20:35:31,345 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 43 [2019-11-23 20:35:31,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:35:31,345 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2019-11-23 20:35:31,345 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-11-23 20:35:31,345 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2019-11-23 20:35:31,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-11-23 20:35:31,347 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:35:31,347 INFO L410 BasicCegarLoop]: trace histogram [30, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:35:31,551 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:35:31,551 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:35:31,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:35:31,552 INFO L82 PathProgramCache]: Analyzing trace with hash 803326162, now seen corresponding path program 11 times [2019-11-23 20:35:31,552 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:35:31,552 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46427259] [2019-11-23 20:35:31,553 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:35:31,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:35:31,719 INFO L134 CoverageAnalysis]: Checked inductivity of 531 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2019-11-23 20:35:31,720 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46427259] [2019-11-23 20:35:31,720 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685910755] [2019-11-23 20:35:31,720 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 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 [2019-11-23 20:36:04,715 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2019-11-23 20:36:04,715 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:36:04,732 INFO L255 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 20:36:04,736 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:36:04,758 INFO L134 CoverageAnalysis]: Checked inductivity of 531 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2019-11-23 20:36:04,758 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:36:04,759 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-11-23 20:36:04,759 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381724816] [2019-11-23 20:36:04,759 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-23 20:36:04,760 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:36:04,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-23 20:36:04,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-11-23 20:36:04,760 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 15 states. [2019-11-23 20:36:04,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:36:04,875 INFO L93 Difference]: Finished difference Result 119 states and 122 transitions. [2019-11-23 20:36:04,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-23 20:36:04,875 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 50 [2019-11-23 20:36:04,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:36:04,876 INFO L225 Difference]: With dead ends: 119 [2019-11-23 20:36:04,876 INFO L226 Difference]: Without dead ends: 113 [2019-11-23 20:36:04,876 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-11-23 20:36:04,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2019-11-23 20:36:04,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 53. [2019-11-23 20:36:04,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-11-23 20:36:04,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2019-11-23 20:36:04,885 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 50 [2019-11-23 20:36:04,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:36:04,886 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2019-11-23 20:36:04,886 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-23 20:36:04,886 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2019-11-23 20:36:04,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-23 20:36:04,890 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:36:04,890 INFO L410 BasicCegarLoop]: trace histogram [30, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:36:05,091 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:36:05,091 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:36:05,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:36:05,092 INFO L82 PathProgramCache]: Analyzing trace with hash -815246600, now seen corresponding path program 12 times [2019-11-23 20:36:05,092 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:36:05,093 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895274300] [2019-11-23 20:36:05,093 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:36:05,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:36:05,274 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2019-11-23 20:36:05,275 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895274300] [2019-11-23 20:36:05,275 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121588754] [2019-11-23 20:36:05,275 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 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 [2019-11-23 20:36:10,945 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-11-23 20:36:10,945 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:36:10,950 INFO L255 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-23 20:36:10,952 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:36:10,989 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2019-11-23 20:36:10,990 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:36:10,990 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-11-23 20:36:10,990 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542551974] [2019-11-23 20:36:10,991 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-23 20:36:10,991 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:36:10,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-23 20:36:10,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:36:10,992 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand 16 states. [2019-11-23 20:36:11,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:36:11,097 INFO L93 Difference]: Finished difference Result 125 states and 128 transitions. [2019-11-23 20:36:11,098 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 20:36:11,098 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 51 [2019-11-23 20:36:11,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:36:11,099 INFO L225 Difference]: With dead ends: 125 [2019-11-23 20:36:11,100 INFO L226 Difference]: Without dead ends: 119 [2019-11-23 20:36:11,100 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:36:11,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2019-11-23 20:36:11,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 54. [2019-11-23 20:36:11,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-11-23 20:36:11,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2019-11-23 20:36:11,108 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 51 [2019-11-23 20:36:11,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:36:11,110 INFO L462 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2019-11-23 20:36:11,110 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-23 20:36:11,110 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2019-11-23 20:36:11,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-11-23 20:36:11,111 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:36:11,112 INFO L410 BasicCegarLoop]: trace histogram [30, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:36:11,317 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:36:11,317 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:36:11,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:36:11,318 INFO L82 PathProgramCache]: Analyzing trace with hash 548605330, now seen corresponding path program 13 times [2019-11-23 20:36:11,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:36:11,319 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30383716] [2019-11-23 20:36:11,319 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:36:11,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:36:11,488 INFO L134 CoverageAnalysis]: Checked inductivity of 556 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2019-11-23 20:36:11,488 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30383716] [2019-11-23 20:36:11,489 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031830346] [2019-11-23 20:36:11,489 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 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 [2019-11-23 20:36:11,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:36:11,558 INFO L255 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 32 conjunts are in the unsatisfiable core [2019-11-23 20:36:11,560 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:36:11,814 INFO L134 CoverageAnalysis]: Checked inductivity of 556 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2019-11-23 20:36:11,815 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:36:11,815 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 33] total 40 [2019-11-23 20:36:11,816 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434999712] [2019-11-23 20:36:11,816 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-11-23 20:36:11,816 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:36:11,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-11-23 20:36:11,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=779, Invalid=781, Unknown=0, NotChecked=0, Total=1560 [2019-11-23 20:36:11,818 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand 40 states. [2019-11-23 20:36:12,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:36:12,041 INFO L93 Difference]: Finished difference Result 153 states and 164 transitions. [2019-11-23 20:36:12,042 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-11-23 20:36:12,042 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 52 [2019-11-23 20:36:12,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:36:12,043 INFO L225 Difference]: With dead ends: 153 [2019-11-23 20:36:12,043 INFO L226 Difference]: Without dead ends: 132 [2019-11-23 20:36:12,044 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 933 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=779, Invalid=781, Unknown=0, NotChecked=0, Total=1560 [2019-11-23 20:36:12,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2019-11-23 20:36:12,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 62. [2019-11-23 20:36:12,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-11-23 20:36:12,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2019-11-23 20:36:12,058 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 52 [2019-11-23 20:36:12,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:36:12,059 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2019-11-23 20:36:12,060 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-11-23 20:36:12,060 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2019-11-23 20:36:12,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-11-23 20:36:12,064 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:36:12,064 INFO L410 BasicCegarLoop]: trace histogram [37, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:36:12,265 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:36:12,265 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:36:12,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:36:12,266 INFO L82 PathProgramCache]: Analyzing trace with hash 123239187, now seen corresponding path program 14 times [2019-11-23 20:36:12,266 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:36:12,267 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730373258] [2019-11-23 20:36:12,267 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:36:12,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:36:12,470 INFO L134 CoverageAnalysis]: Checked inductivity of 808 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2019-11-23 20:36:12,470 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730373258] [2019-11-23 20:36:12,470 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473862175] [2019-11-23 20:36:12,470 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 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 [2019-11-23 20:36:12,546 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:36:12,546 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:36:12,548 INFO L255 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 39 conjunts are in the unsatisfiable core [2019-11-23 20:36:12,550 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:36:12,832 INFO L134 CoverageAnalysis]: Checked inductivity of 808 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2019-11-23 20:36:12,832 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:36:12,832 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 40] total 46 [2019-11-23 20:36:12,833 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877708298] [2019-11-23 20:36:12,833 INFO L442 AbstractCegarLoop]: Interpolant automaton has 46 states [2019-11-23 20:36:12,833 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:36:12,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2019-11-23 20:36:12,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1034, Invalid=1036, Unknown=0, NotChecked=0, Total=2070 [2019-11-23 20:36:12,835 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 46 states. [2019-11-23 20:36:13,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:36:13,084 INFO L93 Difference]: Finished difference Result 166 states and 176 transitions. [2019-11-23 20:36:13,085 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2019-11-23 20:36:13,085 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 60 [2019-11-23 20:36:13,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:36:13,086 INFO L225 Difference]: With dead ends: 166 [2019-11-23 20:36:13,086 INFO L226 Difference]: Without dead ends: 144 [2019-11-23 20:36:13,087 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1283 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=1034, Invalid=1036, Unknown=0, NotChecked=0, Total=2070 [2019-11-23 20:36:13,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2019-11-23 20:36:13,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 69. [2019-11-23 20:36:13,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-11-23 20:36:13,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2019-11-23 20:36:13,094 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 60 [2019-11-23 20:36:13,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:36:13,094 INFO L462 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2019-11-23 20:36:13,094 INFO L463 AbstractCegarLoop]: Interpolant automaton has 46 states. [2019-11-23 20:36:13,094 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2019-11-23 20:36:13,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-11-23 20:36:13,095 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:36:13,095 INFO L410 BasicCegarLoop]: trace histogram [43, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:36:13,305 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:36:13,306 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:36:13,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:36:13,306 INFO L82 PathProgramCache]: Analyzing trace with hash -1748672777, now seen corresponding path program 15 times [2019-11-23 20:36:13,307 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:36:13,307 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153478283] [2019-11-23 20:36:13,308 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:36:13,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:36:13,508 INFO L134 CoverageAnalysis]: Checked inductivity of 1066 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 946 trivial. 0 not checked. [2019-11-23 20:36:13,508 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153478283] [2019-11-23 20:36:13,508 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931637085] [2019-11-23 20:36:13,509 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 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 [2019-11-23 20:36:21,117 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-11-23 20:36:21,118 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:36:21,124 INFO L255 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-23 20:36:21,126 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:36:21,142 INFO L134 CoverageAnalysis]: Checked inductivity of 1066 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 946 trivial. 0 not checked. [2019-11-23 20:36:21,142 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:36:21,143 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-11-23 20:36:21,143 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876637464] [2019-11-23 20:36:21,143 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-23 20:36:21,144 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:36:21,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-23 20:36:21,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:36:21,144 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand 19 states. [2019-11-23 20:36:21,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:36:21,293 INFO L93 Difference]: Finished difference Result 156 states and 159 transitions. [2019-11-23 20:36:21,293 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-23 20:36:21,293 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 67 [2019-11-23 20:36:21,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:36:21,294 INFO L225 Difference]: With dead ends: 156 [2019-11-23 20:36:21,294 INFO L226 Difference]: Without dead ends: 150 [2019-11-23 20:36:21,295 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:36:21,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2019-11-23 20:36:21,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 70. [2019-11-23 20:36:21,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-11-23 20:36:21,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2019-11-23 20:36:21,303 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 67 [2019-11-23 20:36:21,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:36:21,304 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2019-11-23 20:36:21,304 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-23 20:36:21,304 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2019-11-23 20:36:21,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-11-23 20:36:21,305 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:36:21,305 INFO L410 BasicCegarLoop]: trace histogram [43, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:36:21,511 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:36:21,511 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:36:21,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:36:21,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1677164915, now seen corresponding path program 16 times [2019-11-23 20:36:21,512 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:36:21,513 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089653783] [2019-11-23 20:36:21,513 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:36:21,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:36:21,726 INFO L134 CoverageAnalysis]: Checked inductivity of 1082 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 946 trivial. 0 not checked. [2019-11-23 20:36:21,727 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089653783] [2019-11-23 20:36:21,727 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877910323] [2019-11-23 20:36:21,727 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 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 [2019-11-23 20:36:21,813 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:36:21,813 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:36:21,815 INFO L255 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 45 conjunts are in the unsatisfiable core [2019-11-23 20:36:21,816 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:36:22,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1082 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2019-11-23 20:36:22,148 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:36:22,149 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 46] total 53 [2019-11-23 20:36:22,149 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61310115] [2019-11-23 20:36:22,149 INFO L442 AbstractCegarLoop]: Interpolant automaton has 53 states [2019-11-23 20:36:22,150 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:36:22,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2019-11-23 20:36:22,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1377, Invalid=1379, Unknown=0, NotChecked=0, Total=2756 [2019-11-23 20:36:22,151 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 53 states. [2019-11-23 20:36:22,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:36:22,463 INFO L93 Difference]: Finished difference Result 187 states and 198 transitions. [2019-11-23 20:36:22,464 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2019-11-23 20:36:22,464 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 68 [2019-11-23 20:36:22,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:36:22,465 INFO L225 Difference]: With dead ends: 187 [2019-11-23 20:36:22,465 INFO L226 Difference]: Without dead ends: 163 [2019-11-23 20:36:22,466 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1757 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1377, Invalid=1379, Unknown=0, NotChecked=0, Total=2756 [2019-11-23 20:36:22,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2019-11-23 20:36:22,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 78. [2019-11-23 20:36:22,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-11-23 20:36:22,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2019-11-23 20:36:22,472 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 68 [2019-11-23 20:36:22,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:36:22,472 INFO L462 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2019-11-23 20:36:22,472 INFO L463 AbstractCegarLoop]: Interpolant automaton has 53 states. [2019-11-23 20:36:22,472 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2019-11-23 20:36:22,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-11-23 20:36:22,473 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:36:22,473 INFO L410 BasicCegarLoop]: trace histogram [50, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:36:22,678 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:36:22,678 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:36:22,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:36:22,679 INFO L82 PathProgramCache]: Analyzing trace with hash -1446285998, now seen corresponding path program 17 times [2019-11-23 20:36:22,679 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:36:22,680 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743457659] [2019-11-23 20:36:22,680 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:36:22,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:36:22,984 INFO L134 CoverageAnalysis]: Checked inductivity of 1428 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 1275 trivial. 0 not checked. [2019-11-23 20:36:22,985 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743457659] [2019-11-23 20:36:22,985 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319896243] [2019-11-23 20:36:22,985 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 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