/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/eca-rers2012/Problem16_label21.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 21:18:13,615 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 21:18:13,621 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 21:18:13,635 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-23 21:18:13,672 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 21:18:13,686 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 21:18:13,687 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 21:18:13,688 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 21:18:13,688 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 21:18:13,688 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 21:18:13,688 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 21:18:13,689 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 21:18:13,689 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 21:18:13,689 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 21:18:13,689 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 21:18:13,689 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 21:18:13,690 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 21:18:13,690 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 21:18:13,690 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 21:18:13,690 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 21:18:13,690 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 21:18:13,690 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 21:18:13,691 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 21:18:13,691 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 21:18:13,691 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 21:18:13,691 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 21:18:13,691 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 21:18:13,692 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 21:18:13,692 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 21:18:13,692 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 21:18:13,692 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 21:18:13,692 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 21:18:13,693 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 21:18:13,693 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 21:18:13,693 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 21:18:13,989 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 21:18:14,004 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 21:18:14,008 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 21:18:14,010 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 21:18:14,010 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 21:18:14,012 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label21.c [2019-11-23 21:18:14,088 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/30ea86a02/95ab4c3b7fa543a59ecccb6b3226755e/FLAG29f5feec3 [2019-11-23 21:18:14,805 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 21:18:14,805 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label21.c [2019-11-23 21:18:14,830 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/30ea86a02/95ab4c3b7fa543a59ecccb6b3226755e/FLAG29f5feec3 [2019-11-23 21:18:15,008 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/30ea86a02/95ab4c3b7fa543a59ecccb6b3226755e [2019-11-23 21:18:15,020 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 21:18:15,022 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 21:18:15,023 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 21:18:15,023 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 21:18:15,026 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 21:18:15,027 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:18:15" (1/1) ... [2019-11-23 21:18:15,030 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7142d6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:18:15, skipping insertion in model container [2019-11-23 21:18:15,030 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:18:15" (1/1) ... [2019-11-23 21:18:15,038 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 21:18:15,118 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 21:18:16,121 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 21:18:16,128 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 21:18:16,381 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 21:18:16,405 INFO L208 MainTranslator]: Completed translation [2019-11-23 21:18:16,406 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:18:16 WrapperNode [2019-11-23 21:18:16,406 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 21:18:16,407 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 21:18:16,407 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 21:18:16,407 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 21:18:16,416 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:18:16" (1/1) ... [2019-11-23 21:18:16,461 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:18:16" (1/1) ... [2019-11-23 21:18:16,613 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 21:18:16,614 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 21:18:16,614 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 21:18:16,614 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 21:18:16,624 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:18:16" (1/1) ... [2019-11-23 21:18:16,625 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:18:16" (1/1) ... [2019-11-23 21:18:16,643 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:18:16" (1/1) ... [2019-11-23 21:18:16,643 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:18:16" (1/1) ... [2019-11-23 21:18:16,720 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:18:16" (1/1) ... [2019-11-23 21:18:16,751 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:18:16" (1/1) ... [2019-11-23 21:18:16,773 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:18:16" (1/1) ... [2019-11-23 21:18:16,796 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 21:18:16,797 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 21:18:16,797 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 21:18:16,797 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 21:18:16,798 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:18:16" (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 21:18:16,914 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 21:18:16,915 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 21:18:19,295 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 21:18:19,295 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-23 21:18:19,297 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:18:19 BoogieIcfgContainer [2019-11-23 21:18:19,297 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 21:18:19,299 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 21:18:19,300 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 21:18:19,303 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 21:18:19,304 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:18:15" (1/3) ... [2019-11-23 21:18:19,305 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cb3eda9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:18:19, skipping insertion in model container [2019-11-23 21:18:19,305 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:18:16" (2/3) ... [2019-11-23 21:18:19,306 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cb3eda9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:18:19, skipping insertion in model container [2019-11-23 21:18:19,306 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:18:19" (3/3) ... [2019-11-23 21:18:19,308 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label21.c [2019-11-23 21:18:19,318 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 21:18:19,327 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 21:18:19,339 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 21:18:19,369 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 21:18:19,369 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 21:18:19,370 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 21:18:19,370 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 21:18:19,370 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 21:18:19,370 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 21:18:19,370 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 21:18:19,370 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 21:18:19,446 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states. [2019-11-23 21:18:19,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-23 21:18:19,454 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:18:19,455 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:18:19,456 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:18:19,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:18:19,463 INFO L82 PathProgramCache]: Analyzing trace with hash 323974986, now seen corresponding path program 1 times [2019-11-23 21:18:19,472 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:18:19,473 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901160447] [2019-11-23 21:18:19,473 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:18:19,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:18:19,978 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 21:18:19,979 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901160447] [2019-11-23 21:18:19,981 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:18:19,981 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-23 21:18:19,984 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115859042] [2019-11-23 21:18:19,989 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 21:18:19,990 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:18:20,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 21:18:20,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-11-23 21:18:20,013 INFO L87 Difference]: Start difference. First operand 396 states. Second operand 7 states. [2019-11-23 21:18:25,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:18:25,821 INFO L93 Difference]: Finished difference Result 1815 states and 3471 transitions. [2019-11-23 21:18:25,822 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 21:18:25,823 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 38 [2019-11-23 21:18:25,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:18:25,862 INFO L225 Difference]: With dead ends: 1815 [2019-11-23 21:18:25,862 INFO L226 Difference]: Without dead ends: 1342 [2019-11-23 21:18:25,875 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2019-11-23 21:18:25,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1342 states. [2019-11-23 21:18:25,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1342 to 991. [2019-11-23 21:18:25,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 991 states. [2019-11-23 21:18:26,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 991 states to 991 states and 1483 transitions. [2019-11-23 21:18:26,004 INFO L78 Accepts]: Start accepts. Automaton has 991 states and 1483 transitions. Word has length 38 [2019-11-23 21:18:26,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:18:26,004 INFO L462 AbstractCegarLoop]: Abstraction has 991 states and 1483 transitions. [2019-11-23 21:18:26,005 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 21:18:26,005 INFO L276 IsEmpty]: Start isEmpty. Operand 991 states and 1483 transitions. [2019-11-23 21:18:26,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2019-11-23 21:18:26,022 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:18:26,022 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:18:26,022 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:18:26,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:18:26,023 INFO L82 PathProgramCache]: Analyzing trace with hash -1339527614, now seen corresponding path program 1 times [2019-11-23 21:18:26,023 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:18:26,024 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029603853] [2019-11-23 21:18:26,024 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:18:26,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:18:26,434 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2019-11-23 21:18:26,435 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029603853] [2019-11-23 21:18:26,435 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:18:26,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:18:26,436 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699215246] [2019-11-23 21:18:26,439 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:18:26,439 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:18:26,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:18:26,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:18:26,440 INFO L87 Difference]: Start difference. First operand 991 states and 1483 transitions. Second operand 4 states. [2019-11-23 21:18:28,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:18:28,680 INFO L93 Difference]: Finished difference Result 2638 states and 4103 transitions. [2019-11-23 21:18:28,683 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:18:28,683 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 228 [2019-11-23 21:18:28,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:18:28,693 INFO L225 Difference]: With dead ends: 2638 [2019-11-23 21:18:28,693 INFO L226 Difference]: Without dead ends: 1649 [2019-11-23 21:18:28,695 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:18:28,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1649 states. [2019-11-23 21:18:28,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1649 to 1649. [2019-11-23 21:18:28,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1649 states. [2019-11-23 21:18:28,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1649 states to 1649 states and 2382 transitions. [2019-11-23 21:18:28,738 INFO L78 Accepts]: Start accepts. Automaton has 1649 states and 2382 transitions. Word has length 228 [2019-11-23 21:18:28,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:18:28,739 INFO L462 AbstractCegarLoop]: Abstraction has 1649 states and 2382 transitions. [2019-11-23 21:18:28,739 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:18:28,739 INFO L276 IsEmpty]: Start isEmpty. Operand 1649 states and 2382 transitions. [2019-11-23 21:18:28,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2019-11-23 21:18:28,744 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:18:28,744 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:18:28,745 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:18:28,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:18:28,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1455088589, now seen corresponding path program 1 times [2019-11-23 21:18:28,745 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:18:28,746 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825283332] [2019-11-23 21:18:28,746 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:18:28,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:18:29,031 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 346 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-23 21:18:29,032 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825283332] [2019-11-23 21:18:29,032 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:18:29,032 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:18:29,033 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863003914] [2019-11-23 21:18:29,037 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:18:29,037 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:18:29,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:18:29,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:18:29,041 INFO L87 Difference]: Start difference. First operand 1649 states and 2382 transitions. Second operand 4 states. [2019-11-23 21:18:31,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:18:31,545 INFO L93 Difference]: Finished difference Result 4612 states and 6546 transitions. [2019-11-23 21:18:31,546 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:18:31,546 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 339 [2019-11-23 21:18:31,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:18:31,560 INFO L225 Difference]: With dead ends: 4612 [2019-11-23 21:18:31,560 INFO L226 Difference]: Without dead ends: 2636 [2019-11-23 21:18:31,563 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:18:31,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2636 states. [2019-11-23 21:18:31,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2636 to 2636. [2019-11-23 21:18:31,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2636 states. [2019-11-23 21:18:31,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2636 states to 2636 states and 2855 transitions. [2019-11-23 21:18:31,618 INFO L78 Accepts]: Start accepts. Automaton has 2636 states and 2855 transitions. Word has length 339 [2019-11-23 21:18:31,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:18:31,619 INFO L462 AbstractCegarLoop]: Abstraction has 2636 states and 2855 transitions. [2019-11-23 21:18:31,619 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:18:31,619 INFO L276 IsEmpty]: Start isEmpty. Operand 2636 states and 2855 transitions. [2019-11-23 21:18:31,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 616 [2019-11-23 21:18:31,632 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:18:31,632 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:18:31,633 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:18:31,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:18:31,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1707840837, now seen corresponding path program 1 times [2019-11-23 21:18:31,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:18:31,634 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836968001] [2019-11-23 21:18:31,634 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:18:31,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:18:32,341 INFO L134 CoverageAnalysis]: Checked inductivity of 805 backedges. 645 proven. 0 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2019-11-23 21:18:32,343 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836968001] [2019-11-23 21:18:32,343 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:18:32,343 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:18:32,343 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587749377] [2019-11-23 21:18:32,345 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:18:32,345 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:18:32,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:18:32,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:18:32,346 INFO L87 Difference]: Start difference. First operand 2636 states and 2855 transitions. Second operand 4 states. [2019-11-23 21:18:34,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:18:34,444 INFO L93 Difference]: Finished difference Result 8231 states and 8981 transitions. [2019-11-23 21:18:34,444 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:18:34,445 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 615 [2019-11-23 21:18:34,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:18:34,471 INFO L225 Difference]: With dead ends: 8231 [2019-11-23 21:18:34,471 INFO L226 Difference]: Without dead ends: 5926 [2019-11-23 21:18:34,475 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:18:34,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5926 states. [2019-11-23 21:18:34,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5926 to 4939. [2019-11-23 21:18:34,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4939 states. [2019-11-23 21:18:34,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4939 states to 4939 states and 5298 transitions. [2019-11-23 21:18:34,610 INFO L78 Accepts]: Start accepts. Automaton has 4939 states and 5298 transitions. Word has length 615 [2019-11-23 21:18:34,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:18:34,611 INFO L462 AbstractCegarLoop]: Abstraction has 4939 states and 5298 transitions. [2019-11-23 21:18:34,611 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:18:34,612 INFO L276 IsEmpty]: Start isEmpty. Operand 4939 states and 5298 transitions. [2019-11-23 21:18:34,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 679 [2019-11-23 21:18:34,633 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:18:34,633 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:18:34,635 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:18:34,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:18:34,635 INFO L82 PathProgramCache]: Analyzing trace with hash -276815383, now seen corresponding path program 1 times [2019-11-23 21:18:34,636 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:18:34,637 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704896258] [2019-11-23 21:18:34,638 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:18:34,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:18:35,238 INFO L134 CoverageAnalysis]: Checked inductivity of 897 backedges. 719 proven. 0 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2019-11-23 21:18:35,239 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704896258] [2019-11-23 21:18:35,239 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:18:35,240 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:18:35,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353717830] [2019-11-23 21:18:35,241 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:18:35,241 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:18:35,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:18:35,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:18:35,242 INFO L87 Difference]: Start difference. First operand 4939 states and 5298 transitions. Second operand 4 states. [2019-11-23 21:18:37,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:18:37,301 INFO L93 Difference]: Finished difference Result 12837 states and 13876 transitions. [2019-11-23 21:18:37,301 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:18:37,302 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 678 [2019-11-23 21:18:37,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:18:37,335 INFO L225 Difference]: With dead ends: 12837 [2019-11-23 21:18:37,335 INFO L226 Difference]: Without dead ends: 8229 [2019-11-23 21:18:37,342 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:18:37,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8229 states. [2019-11-23 21:18:37,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8229 to 8229. [2019-11-23 21:18:37,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8229 states. [2019-11-23 21:18:37,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8229 states to 8229 states and 8759 transitions. [2019-11-23 21:18:37,469 INFO L78 Accepts]: Start accepts. Automaton has 8229 states and 8759 transitions. Word has length 678 [2019-11-23 21:18:37,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:18:37,470 INFO L462 AbstractCegarLoop]: Abstraction has 8229 states and 8759 transitions. [2019-11-23 21:18:37,470 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:18:37,470 INFO L276 IsEmpty]: Start isEmpty. Operand 8229 states and 8759 transitions. [2019-11-23 21:18:37,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 704 [2019-11-23 21:18:37,480 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:18:37,480 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:18:37,481 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:18:37,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:18:37,481 INFO L82 PathProgramCache]: Analyzing trace with hash 340514409, now seen corresponding path program 1 times [2019-11-23 21:18:37,481 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:18:37,482 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302507840] [2019-11-23 21:18:37,482 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:18:37,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:18:38,833 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 321 proven. 243 refuted. 0 times theorem prover too weak. 335 trivial. 0 not checked. [2019-11-23 21:18:38,833 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302507840] [2019-11-23 21:18:38,834 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519640840] [2019-11-23 21:18:38,834 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 21:18:39,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:18:39,052 INFO L255 TraceCheckSpWp]: Trace formula consists of 839 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:18:39,079 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:18:39,415 INFO L134 CoverageAnalysis]: Checked inductivity of 899 backedges. 424 proven. 0 refuted. 0 times theorem prover too weak. 475 trivial. 0 not checked. [2019-11-23 21:18:39,416 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:18:39,416 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2019-11-23 21:18:39,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786787793] [2019-11-23 21:18:39,418 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:18:39,418 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:18:39,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:18:39,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-11-23 21:18:39,419 INFO L87 Difference]: Start difference. First operand 8229 states and 8759 transitions. Second operand 3 states. [2019-11-23 21:18:40,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:18:40,624 INFO L93 Difference]: Finished difference Result 16127 states and 17185 transitions. [2019-11-23 21:18:40,624 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:18:40,625 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 703 [2019-11-23 21:18:40,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:18:40,678 INFO L225 Difference]: With dead ends: 16127 [2019-11-23 21:18:40,678 INFO L226 Difference]: Without dead ends: 8229 [2019-11-23 21:18:40,688 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 712 GetRequests, 703 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-11-23 21:18:40,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8229 states. [2019-11-23 21:18:40,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8229 to 8229. [2019-11-23 21:18:40,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8229 states. [2019-11-23 21:18:40,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8229 states to 8229 states and 8692 transitions. [2019-11-23 21:18:40,838 INFO L78 Accepts]: Start accepts. Automaton has 8229 states and 8692 transitions. Word has length 703 [2019-11-23 21:18:40,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:18:40,839 INFO L462 AbstractCegarLoop]: Abstraction has 8229 states and 8692 transitions. [2019-11-23 21:18:40,839 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:18:40,840 INFO L276 IsEmpty]: Start isEmpty. Operand 8229 states and 8692 transitions. [2019-11-23 21:18:40,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 875 [2019-11-23 21:18:40,859 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:18:40,862 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:18:41,068 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:18:41,070 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:18:41,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:18:41,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1714990728, now seen corresponding path program 1 times [2019-11-23 21:18:41,071 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:18:41,072 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683245359] [2019-11-23 21:18:41,072 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:18:41,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:18:42,377 INFO L134 CoverageAnalysis]: Checked inductivity of 1507 backedges. 751 proven. 0 refuted. 0 times theorem prover too weak. 756 trivial. 0 not checked. [2019-11-23 21:18:42,378 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683245359] [2019-11-23 21:18:42,378 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:18:42,378 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:18:42,379 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426445572] [2019-11-23 21:18:42,380 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:18:42,380 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:18:42,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:18:42,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:18:42,381 INFO L87 Difference]: Start difference. First operand 8229 states and 8692 transitions. Second operand 4 states. [2019-11-23 21:18:44,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:18:44,357 INFO L93 Difference]: Finished difference Result 17772 states and 18743 transitions. [2019-11-23 21:18:44,357 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:18:44,357 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 874 [2019-11-23 21:18:44,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:18:44,382 INFO L225 Difference]: With dead ends: 17772 [2019-11-23 21:18:44,382 INFO L226 Difference]: Without dead ends: 9216 [2019-11-23 21:18:44,392 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:18:44,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9216 states. [2019-11-23 21:18:44,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9216 to 7900. [2019-11-23 21:18:44,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7900 states. [2019-11-23 21:18:44,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7900 states to 7900 states and 8219 transitions. [2019-11-23 21:18:44,501 INFO L78 Accepts]: Start accepts. Automaton has 7900 states and 8219 transitions. Word has length 874 [2019-11-23 21:18:44,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:18:44,502 INFO L462 AbstractCegarLoop]: Abstraction has 7900 states and 8219 transitions. [2019-11-23 21:18:44,502 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:18:44,502 INFO L276 IsEmpty]: Start isEmpty. Operand 7900 states and 8219 transitions. [2019-11-23 21:18:44,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1030 [2019-11-23 21:18:44,521 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:18:44,522 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:18:44,522 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:18:44,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:18:44,522 INFO L82 PathProgramCache]: Analyzing trace with hash -2118622610, now seen corresponding path program 1 times [2019-11-23 21:18:44,523 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:18:44,523 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736940434] [2019-11-23 21:18:44,523 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:18:44,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:18:47,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1599 backedges. 1122 proven. 38 refuted. 0 times theorem prover too weak. 439 trivial. 0 not checked. [2019-11-23 21:18:47,487 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736940434] [2019-11-23 21:18:47,487 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526025194] [2019-11-23 21:18:47,487 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:18:47,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:18:47,736 INFO L255 TraceCheckSpWp]: Trace formula consists of 1196 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 21:18:47,752 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:18:48,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1599 backedges. 964 proven. 83 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2019-11-23 21:18:48,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 21:18:48,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 3] total 11 [2019-11-23 21:18:48,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234232716] [2019-11-23 21:18:48,848 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 21:18:48,849 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:18:48,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 21:18:48,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-11-23 21:18:48,849 INFO L87 Difference]: Start difference. First operand 7900 states and 8219 transitions. Second operand 11 states. [2019-11-23 21:18:59,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:18:59,721 INFO L93 Difference]: Finished difference Result 19469 states and 20307 transitions. [2019-11-23 21:18:59,723 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-11-23 21:18:59,724 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 1029 [2019-11-23 21:18:59,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:18:59,743 INFO L225 Difference]: With dead ends: 19469 [2019-11-23 21:18:59,744 INFO L226 Difference]: Without dead ends: 11900 [2019-11-23 21:18:59,752 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 1080 GetRequests, 1044 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=317, Invalid=1089, Unknown=0, NotChecked=0, Total=1406 [2019-11-23 21:18:59,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11900 states. [2019-11-23 21:18:59,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11900 to 9740. [2019-11-23 21:18:59,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9740 states. [2019-11-23 21:18:59,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9740 states to 9740 states and 10058 transitions. [2019-11-23 21:18:59,920 INFO L78 Accepts]: Start accepts. Automaton has 9740 states and 10058 transitions. Word has length 1029 [2019-11-23 21:18:59,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:18:59,920 INFO L462 AbstractCegarLoop]: Abstraction has 9740 states and 10058 transitions. [2019-11-23 21:18:59,920 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 21:18:59,920 INFO L276 IsEmpty]: Start isEmpty. Operand 9740 states and 10058 transitions. [2019-11-23 21:18:59,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1660 [2019-11-23 21:18:59,952 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:18:59,954 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:19:00,159 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:19:00,159 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:19:00,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:19:00,160 INFO L82 PathProgramCache]: Analyzing trace with hash -1015306804, now seen corresponding path program 1 times [2019-11-23 21:19:00,160 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:19:00,161 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133723433] [2019-11-23 21:19:00,162 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:19:00,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:19:03,397 INFO L134 CoverageAnalysis]: Checked inductivity of 4527 backedges. 1977 proven. 157 refuted. 0 times theorem prover too weak. 2393 trivial. 0 not checked. [2019-11-23 21:19:03,397 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133723433] [2019-11-23 21:19:03,398 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009049636] [2019-11-23 21:19:03,398 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:19:03,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:19:03,840 INFO L255 TraceCheckSpWp]: Trace formula consists of 1890 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 21:19:03,862 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:19:05,958 INFO L134 CoverageAnalysis]: Checked inductivity of 4527 backedges. 2134 proven. 0 refuted. 0 times theorem prover too weak. 2393 trivial. 0 not checked. [2019-11-23 21:19:05,959 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:19:05,960 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2019-11-23 21:19:05,960 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542189246] [2019-11-23 21:19:05,961 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:19:05,961 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:19:05,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:19:05,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-23 21:19:05,962 INFO L87 Difference]: Start difference. First operand 9740 states and 10058 transitions. Second operand 3 states. [2019-11-23 21:19:07,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:19:07,286 INFO L93 Difference]: Finished difference Result 20743 states and 21415 transitions. [2019-11-23 21:19:07,287 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:19:07,287 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1659 [2019-11-23 21:19:07,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:19:07,301 INFO L225 Difference]: With dead ends: 20743 [2019-11-23 21:19:07,301 INFO L226 Difference]: Without dead ends: 11334 [2019-11-23 21:19:07,312 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 1667 GetRequests, 1658 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-23 21:19:07,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11334 states. [2019-11-23 21:19:07,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11334 to 10883. [2019-11-23 21:19:07,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10883 states. [2019-11-23 21:19:07,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10883 states to 10883 states and 11216 transitions. [2019-11-23 21:19:07,443 INFO L78 Accepts]: Start accepts. Automaton has 10883 states and 11216 transitions. Word has length 1659 [2019-11-23 21:19:07,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:19:07,444 INFO L462 AbstractCegarLoop]: Abstraction has 10883 states and 11216 transitions. [2019-11-23 21:19:07,444 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:19:07,444 INFO L276 IsEmpty]: Start isEmpty. Operand 10883 states and 11216 transitions. [2019-11-23 21:19:07,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1829 [2019-11-23 21:19:07,483 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:19:07,486 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:19:07,692 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:19:07,692 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:19:07,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:19:07,693 INFO L82 PathProgramCache]: Analyzing trace with hash 231526824, now seen corresponding path program 1 times [2019-11-23 21:19:07,693 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:19:07,693 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883321299] [2019-11-23 21:19:07,694 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:19:08,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:19:12,330 INFO L134 CoverageAnalysis]: Checked inductivity of 5662 backedges. 4447 proven. 0 refuted. 0 times theorem prover too weak. 1215 trivial. 0 not checked. [2019-11-23 21:19:12,330 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883321299] [2019-11-23 21:19:12,331 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:19:12,331 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2019-11-23 21:19:12,331 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034301931] [2019-11-23 21:19:12,333 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 21:19:12,333 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:19:12,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 21:19:12,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2019-11-23 21:19:12,334 INFO L87 Difference]: Start difference. First operand 10883 states and 11216 transitions. Second operand 9 states. [2019-11-23 21:19:20,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:19:20,277 INFO L93 Difference]: Finished difference Result 29687 states and 30616 transitions. [2019-11-23 21:19:20,278 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 21:19:20,278 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 1828 [2019-11-23 21:19:20,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:19:20,300 INFO L225 Difference]: With dead ends: 29687 [2019-11-23 21:19:20,301 INFO L226 Difference]: Without dead ends: 19135 [2019-11-23 21:19:20,312 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2019-11-23 21:19:20,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19135 states. [2019-11-23 21:19:20,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19135 to 10883. [2019-11-23 21:19:20,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10883 states. [2019-11-23 21:19:20,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10883 states to 10883 states and 11202 transitions. [2019-11-23 21:19:20,463 INFO L78 Accepts]: Start accepts. Automaton has 10883 states and 11202 transitions. Word has length 1828 [2019-11-23 21:19:20,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:19:20,465 INFO L462 AbstractCegarLoop]: Abstraction has 10883 states and 11202 transitions. [2019-11-23 21:19:20,465 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 21:19:20,465 INFO L276 IsEmpty]: Start isEmpty. Operand 10883 states and 11202 transitions. [2019-11-23 21:19:20,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1833 [2019-11-23 21:19:20,500 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:19:20,501 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:19:20,501 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:19:20,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:19:20,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1515186063, now seen corresponding path program 1 times [2019-11-23 21:19:20,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:19:20,503 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915694307] [2019-11-23 21:19:20,503 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:19:20,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:19:22,477 INFO L134 CoverageAnalysis]: Checked inductivity of 6644 backedges. 359 proven. 0 refuted. 0 times theorem prover too weak. 6285 trivial. 0 not checked. [2019-11-23 21:19:22,477 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915694307] [2019-11-23 21:19:22,477 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:19:22,477 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:19:22,478 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844272197] [2019-11-23 21:19:22,479 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:19:22,479 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:19:22,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:19:22,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:19:22,480 INFO L87 Difference]: Start difference. First operand 10883 states and 11202 transitions. Second operand 4 states. [2019-11-23 21:19:24,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:19:24,350 INFO L93 Difference]: Finished difference Result 22093 states and 22731 transitions. [2019-11-23 21:19:24,350 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:19:24,351 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1832 [2019-11-23 21:19:24,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:19:24,364 INFO L225 Difference]: With dead ends: 22093 [2019-11-23 21:19:24,364 INFO L226 Difference]: Without dead ends: 10883 [2019-11-23 21:19:24,374 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 3 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:19:24,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10883 states. [2019-11-23 21:19:24,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10883 to 10883. [2019-11-23 21:19:24,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10883 states. [2019-11-23 21:19:24,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10883 states to 10883 states and 11131 transitions. [2019-11-23 21:19:24,506 INFO L78 Accepts]: Start accepts. Automaton has 10883 states and 11131 transitions. Word has length 1832 [2019-11-23 21:19:24,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:19:24,508 INFO L462 AbstractCegarLoop]: Abstraction has 10883 states and 11131 transitions. [2019-11-23 21:19:24,508 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:19:24,509 INFO L276 IsEmpty]: Start isEmpty. Operand 10883 states and 11131 transitions. [2019-11-23 21:19:24,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1990 [2019-11-23 21:19:24,577 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:19:24,579 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:19:24,579 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:19:24,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:19:24,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1621777748, now seen corresponding path program 1 times [2019-11-23 21:19:24,581 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:19:24,581 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464454725] [2019-11-23 21:19:24,582 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:19:24,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:19:28,073 INFO L134 CoverageAnalysis]: Checked inductivity of 6963 backedges. 4615 proven. 186 refuted. 0 times theorem prover too weak. 2162 trivial. 0 not checked. [2019-11-23 21:19:28,073 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464454725] [2019-11-23 21:19:28,073 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338420738] [2019-11-23 21:19:28,074 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:19:28,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:19:28,593 INFO L255 TraceCheckSpWp]: Trace formula consists of 2268 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 21:19:28,613 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:19:31,350 INFO L134 CoverageAnalysis]: Checked inductivity of 6963 backedges. 4646 proven. 0 refuted. 0 times theorem prover too weak. 2317 trivial. 0 not checked. [2019-11-23 21:19:31,351 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:19:31,351 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 10 [2019-11-23 21:19:31,352 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098076169] [2019-11-23 21:19:31,353 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:19:31,353 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:19:31,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:19:31,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-11-23 21:19:31,354 INFO L87 Difference]: Start difference. First operand 10883 states and 11131 transitions. Second operand 4 states. [2019-11-23 21:19:32,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:19:32,950 INFO L93 Difference]: Finished difference Result 21438 states and 21932 transitions. [2019-11-23 21:19:32,950 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:19:32,951 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1989 [2019-11-23 21:19:32,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:19:32,959 INFO L225 Difference]: With dead ends: 21438 [2019-11-23 21:19:32,959 INFO L226 Difference]: Without dead ends: 10886 [2019-11-23 21:19:32,965 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2003 GetRequests, 1991 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2019-11-23 21:19:32,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10886 states. [2019-11-23 21:19:33,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10886 to 10203. [2019-11-23 21:19:33,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10203 states. [2019-11-23 21:19:33,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10203 states to 10203 states and 10425 transitions. [2019-11-23 21:19:33,074 INFO L78 Accepts]: Start accepts. Automaton has 10203 states and 10425 transitions. Word has length 1989 [2019-11-23 21:19:33,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:19:33,075 INFO L462 AbstractCegarLoop]: Abstraction has 10203 states and 10425 transitions. [2019-11-23 21:19:33,075 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:19:33,075 INFO L276 IsEmpty]: Start isEmpty. Operand 10203 states and 10425 transitions. [2019-11-23 21:19:33,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2076 [2019-11-23 21:19:33,141 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:19:33,143 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:19:33,356 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:19:33,356 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:19:33,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:19:33,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1522743548, now seen corresponding path program 1 times [2019-11-23 21:19:33,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:19:33,357 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826119859] [2019-11-23 21:19:33,357 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:19:33,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat