/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/Problem18_label44.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 21:24:14,519 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 21:24:14,525 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 21:24:14,540 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-23 21:24:14,574 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 21:24:14,592 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 21:24:14,592 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 21:24:14,594 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 21:24:14,595 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 21:24:14,595 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 21:24:14,595 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 21:24:14,596 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 21:24:14,596 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 21:24:14,596 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 21:24:14,596 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 21:24:14,597 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 21:24:14,597 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 21:24:14,597 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 21:24:14,598 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 21:24:14,598 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 21:24:14,598 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 21:24:14,598 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 21:24:14,598 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 21:24:14,598 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 21:24:14,599 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 21:24:14,599 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 21:24:14,599 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 21:24:14,599 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 21:24:14,599 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 21:24:14,600 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 21:24:14,600 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 21:24:14,600 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 21:24:14,600 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 21:24:14,600 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 21:24:14,601 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 21:24:14,884 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 21:24:14,901 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 21:24:14,905 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 21:24:14,906 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 21:24:14,907 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 21:24:14,908 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label44.c [2019-11-23 21:24:14,981 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c2cdf099/27c3d21d09d04728a015909c31ac0160/FLAGe450178eb [2019-11-23 21:24:15,708 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 21:24:15,709 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label44.c [2019-11-23 21:24:15,731 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c2cdf099/27c3d21d09d04728a015909c31ac0160/FLAGe450178eb [2019-11-23 21:24:15,863 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c2cdf099/27c3d21d09d04728a015909c31ac0160 [2019-11-23 21:24:15,875 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 21:24:15,877 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 21:24:15,880 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 21:24:15,880 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 21:24:15,884 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 21:24:15,885 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:24:15" (1/1) ... [2019-11-23 21:24:15,888 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ce8710b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:15, skipping insertion in model container [2019-11-23 21:24:15,888 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:24:15" (1/1) ... [2019-11-23 21:24:15,897 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 21:24:16,015 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 21:24:17,448 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 21:24:17,455 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 21:24:18,046 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 21:24:18,075 INFO L208 MainTranslator]: Completed translation [2019-11-23 21:24:18,076 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:18 WrapperNode [2019-11-23 21:24:18,076 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 21:24:18,078 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 21:24:18,078 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 21:24:18,078 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 21:24:18,087 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:18" (1/1) ... [2019-11-23 21:24:18,134 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:18" (1/1) ... [2019-11-23 21:24:18,311 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 21:24:18,311 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 21:24:18,312 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 21:24:18,312 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 21:24:18,322 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:18" (1/1) ... [2019-11-23 21:24:18,322 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:18" (1/1) ... [2019-11-23 21:24:18,362 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:18" (1/1) ... [2019-11-23 21:24:18,362 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:18" (1/1) ... [2019-11-23 21:24:18,473 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:18" (1/1) ... [2019-11-23 21:24:18,502 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:18" (1/1) ... [2019-11-23 21:24:18,554 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:18" (1/1) ... [2019-11-23 21:24:18,597 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 21:24:18,598 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 21:24:18,598 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 21:24:18,598 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 21:24:18,599 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:18" (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 21:24:18,667 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 21:24:18,667 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 21:24:22,782 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 21:24:22,782 INFO L284 CfgBuilder]: Removed 11 assume(true) statements. [2019-11-23 21:24:22,784 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:24:22 BoogieIcfgContainer [2019-11-23 21:24:22,784 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 21:24:22,785 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 21:24:22,785 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 21:24:22,789 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 21:24:22,789 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:24:15" (1/3) ... [2019-11-23 21:24:22,790 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25e6341 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:24:22, skipping insertion in model container [2019-11-23 21:24:22,790 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:24:18" (2/3) ... [2019-11-23 21:24:22,791 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25e6341 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:24:22, skipping insertion in model container [2019-11-23 21:24:22,791 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:24:22" (3/3) ... [2019-11-23 21:24:22,793 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem18_label44.c [2019-11-23 21:24:22,804 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 21:24:22,813 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 21:24:22,826 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 21:24:22,865 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 21:24:22,865 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 21:24:22,865 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 21:24:22,865 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 21:24:22,865 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 21:24:22,866 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 21:24:22,866 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 21:24:22,866 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 21:24:22,898 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states. [2019-11-23 21:24:22,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-23 21:24:22,909 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:24:22,910 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] [2019-11-23 21:24:22,910 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:24:22,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:24:22,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1317301102, now seen corresponding path program 1 times [2019-11-23 21:24:22,926 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:24:22,926 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108654200] [2019-11-23 21:24:22,926 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:24:23,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:24:23,182 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 21:24:23,183 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108654200] [2019-11-23 21:24:23,184 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:24:23,184 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:24:23,186 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849585126] [2019-11-23 21:24:23,191 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:24:23,192 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:24:23,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:24:23,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:24:23,210 INFO L87 Difference]: Start difference. First operand 757 states. Second operand 4 states. [2019-11-23 21:24:30,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:24:30,292 INFO L93 Difference]: Finished difference Result 2898 states and 5646 transitions. [2019-11-23 21:24:30,293 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:24:30,294 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2019-11-23 21:24:30,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:24:30,330 INFO L225 Difference]: With dead ends: 2898 [2019-11-23 21:24:30,330 INFO L226 Difference]: Without dead ends: 2074 [2019-11-23 21:24:30,338 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 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 21:24:30,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2074 states. [2019-11-23 21:24:30,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2074 to 2074. [2019-11-23 21:24:30,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2074 states. [2019-11-23 21:24:30,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2074 states to 2074 states and 3550 transitions. [2019-11-23 21:24:30,489 INFO L78 Accepts]: Start accepts. Automaton has 2074 states and 3550 transitions. Word has length 32 [2019-11-23 21:24:30,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:24:30,490 INFO L462 AbstractCegarLoop]: Abstraction has 2074 states and 3550 transitions. [2019-11-23 21:24:30,490 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:24:30,490 INFO L276 IsEmpty]: Start isEmpty. Operand 2074 states and 3550 transitions. [2019-11-23 21:24:30,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2019-11-23 21:24:30,494 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:24:30,494 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-23 21:24:30,495 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:24:30,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:24:30,495 INFO L82 PathProgramCache]: Analyzing trace with hash 636578754, now seen corresponding path program 1 times [2019-11-23 21:24:30,495 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:24:30,496 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837896220] [2019-11-23 21:24:30,496 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:24:30,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:24:30,697 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:24:30,697 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837896220] [2019-11-23 21:24:30,697 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:24:30,698 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:24:30,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521685359] [2019-11-23 21:24:30,700 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:24:30,700 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:24:30,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:24:30,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:24:30,701 INFO L87 Difference]: Start difference. First operand 2074 states and 3550 transitions. Second operand 4 states. [2019-11-23 21:24:35,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:24:35,150 INFO L93 Difference]: Finished difference Result 6216 states and 10645 transitions. [2019-11-23 21:24:35,152 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:24:35,152 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 97 [2019-11-23 21:24:35,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:24:35,173 INFO L225 Difference]: With dead ends: 6216 [2019-11-23 21:24:35,173 INFO L226 Difference]: Without dead ends: 4144 [2019-11-23 21:24:35,178 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 21:24:35,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4144 states. [2019-11-23 21:24:35,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4144 to 4144. [2019-11-23 21:24:35,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4144 states. [2019-11-23 21:24:35,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4144 states to 4144 states and 5879 transitions. [2019-11-23 21:24:35,254 INFO L78 Accepts]: Start accepts. Automaton has 4144 states and 5879 transitions. Word has length 97 [2019-11-23 21:24:35,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:24:35,255 INFO L462 AbstractCegarLoop]: Abstraction has 4144 states and 5879 transitions. [2019-11-23 21:24:35,255 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:24:35,255 INFO L276 IsEmpty]: Start isEmpty. Operand 4144 states and 5879 transitions. [2019-11-23 21:24:35,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-11-23 21:24:35,258 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:24:35,258 INFO L410 BasicCegarLoop]: trace histogram [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] [2019-11-23 21:24:35,258 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:24:35,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:24:35,259 INFO L82 PathProgramCache]: Analyzing trace with hash -820991434, now seen corresponding path program 1 times [2019-11-23 21:24:35,259 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:24:35,259 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601749987] [2019-11-23 21:24:35,259 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:24:35,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:24:35,381 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:24:35,381 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601749987] [2019-11-23 21:24:35,381 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:24:35,382 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:24:35,382 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627454863] [2019-11-23 21:24:35,383 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:24:35,383 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:24:35,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:24:35,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:24:35,384 INFO L87 Difference]: Start difference. First operand 4144 states and 5879 transitions. Second operand 4 states. [2019-11-23 21:24:41,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:24:41,429 INFO L93 Difference]: Finished difference Result 15876 states and 22770 transitions. [2019-11-23 21:24:41,430 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:24:41,430 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 100 [2019-11-23 21:24:41,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:24:41,475 INFO L225 Difference]: With dead ends: 15876 [2019-11-23 21:24:41,475 INFO L226 Difference]: Without dead ends: 11734 [2019-11-23 21:24:41,482 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 21:24:41,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11734 states. [2019-11-23 21:24:41,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11734 to 7594. [2019-11-23 21:24:41,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7594 states. [2019-11-23 21:24:41,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7594 states to 7594 states and 9833 transitions. [2019-11-23 21:24:41,648 INFO L78 Accepts]: Start accepts. Automaton has 7594 states and 9833 transitions. Word has length 100 [2019-11-23 21:24:41,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:24:41,648 INFO L462 AbstractCegarLoop]: Abstraction has 7594 states and 9833 transitions. [2019-11-23 21:24:41,649 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:24:41,655 INFO L276 IsEmpty]: Start isEmpty. Operand 7594 states and 9833 transitions. [2019-11-23 21:24:41,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2019-11-23 21:24:41,668 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:24:41,669 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, 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] [2019-11-23 21:24:41,669 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:24:41,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:24:41,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1245884635, now seen corresponding path program 1 times [2019-11-23 21:24:41,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:24:41,671 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475162183] [2019-11-23 21:24:41,671 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:24:41,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:24:42,185 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-11-23 21:24:42,186 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475162183] [2019-11-23 21:24:42,186 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:24:42,186 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:24:42,186 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210236128] [2019-11-23 21:24:42,187 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 21:24:42,187 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:24:42,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 21:24:42,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-23 21:24:42,188 INFO L87 Difference]: Start difference. First operand 7594 states and 9833 transitions. Second operand 5 states. [2019-11-23 21:24:48,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:24:48,760 INFO L93 Difference]: Finished difference Result 20706 states and 26450 transitions. [2019-11-23 21:24:48,760 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:24:48,760 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 215 [2019-11-23 21:24:48,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:24:48,806 INFO L225 Difference]: With dead ends: 20706 [2019-11-23 21:24:48,806 INFO L226 Difference]: Without dead ends: 13114 [2019-11-23 21:24:48,815 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:24:48,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13114 states. [2019-11-23 21:24:48,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13114 to 12424. [2019-11-23 21:24:48,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12424 states. [2019-11-23 21:24:49,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12424 states to 12424 states and 14969 transitions. [2019-11-23 21:24:49,022 INFO L78 Accepts]: Start accepts. Automaton has 12424 states and 14969 transitions. Word has length 215 [2019-11-23 21:24:49,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:24:49,024 INFO L462 AbstractCegarLoop]: Abstraction has 12424 states and 14969 transitions. [2019-11-23 21:24:49,024 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 21:24:49,024 INFO L276 IsEmpty]: Start isEmpty. Operand 12424 states and 14969 transitions. [2019-11-23 21:24:49,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 398 [2019-11-23 21:24:49,030 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:24:49,031 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, 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, 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 21:24:49,031 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:24:49,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:24:49,032 INFO L82 PathProgramCache]: Analyzing trace with hash -1555086892, now seen corresponding path program 1 times [2019-11-23 21:24:49,032 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:24:49,032 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173568692] [2019-11-23 21:24:49,032 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:24:49,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:24:49,556 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 288 proven. 3 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2019-11-23 21:24:49,556 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173568692] [2019-11-23 21:24:49,556 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363466636] [2019-11-23 21:24:49,557 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 21:24:49,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:24:49,680 INFO L255 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:24:49,695 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:24:49,841 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 218 proven. 0 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2019-11-23 21:24:49,842 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:24:49,842 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2019-11-23 21:24:49,843 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137861253] [2019-11-23 21:24:49,844 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:24:49,844 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:24:49,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:24:49,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:24:49,845 INFO L87 Difference]: Start difference. First operand 12424 states and 14969 transitions. Second operand 3 states. [2019-11-23 21:24:53,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:24:53,674 INFO L93 Difference]: Finished difference Result 29676 states and 36867 transitions. [2019-11-23 21:24:53,674 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:24:53,674 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 397 [2019-11-23 21:24:53,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:24:53,715 INFO L225 Difference]: With dead ends: 29676 [2019-11-23 21:24:53,716 INFO L226 Difference]: Without dead ends: 17944 [2019-11-23 21:24:53,727 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 396 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:24:53,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17944 states. [2019-11-23 21:24:54,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17944 to 17944. [2019-11-23 21:24:54,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17944 states. [2019-11-23 21:24:54,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17944 states to 17944 states and 21900 transitions. [2019-11-23 21:24:54,053 INFO L78 Accepts]: Start accepts. Automaton has 17944 states and 21900 transitions. Word has length 397 [2019-11-23 21:24:54,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:24:54,056 INFO L462 AbstractCegarLoop]: Abstraction has 17944 states and 21900 transitions. [2019-11-23 21:24:54,056 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:24:54,056 INFO L276 IsEmpty]: Start isEmpty. Operand 17944 states and 21900 transitions. [2019-11-23 21:24:54,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 466 [2019-11-23 21:24:54,071 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:24:54,072 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:24:54,276 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:24:54,276 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:24:54,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:24:54,277 INFO L82 PathProgramCache]: Analyzing trace with hash 994754858, now seen corresponding path program 1 times [2019-11-23 21:24:54,277 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:24:54,277 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478595548] [2019-11-23 21:24:54,277 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:24:54,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:24:55,070 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 356 proven. 3 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2019-11-23 21:24:55,071 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478595548] [2019-11-23 21:24:55,071 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826761105] [2019-11-23 21:24:55,071 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 21:24:55,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:24:55,207 INFO L255 TraceCheckSpWp]: Trace formula consists of 573 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:24:55,219 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:24:55,357 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2019-11-23 21:24:55,357 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:24:55,358 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2019-11-23 21:24:55,359 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527195482] [2019-11-23 21:24:55,360 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:24:55,360 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:24:55,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:24:55,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:24:55,361 INFO L87 Difference]: Start difference. First operand 17944 states and 21900 transitions. Second operand 3 states. [2019-11-23 21:24:58,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:24:58,856 INFO L93 Difference]: Finished difference Result 35196 states and 43102 transitions. [2019-11-23 21:24:58,856 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:24:58,856 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 465 [2019-11-23 21:24:58,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:24:58,892 INFO L225 Difference]: With dead ends: 35196 [2019-11-23 21:24:58,893 INFO L226 Difference]: Without dead ends: 17944 [2019-11-23 21:24:58,910 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 469 GetRequests, 464 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:24:58,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17944 states. [2019-11-23 21:24:59,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17944 to 17254. [2019-11-23 21:24:59,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17254 states. [2019-11-23 21:24:59,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17254 states to 17254 states and 19721 transitions. [2019-11-23 21:24:59,157 INFO L78 Accepts]: Start accepts. Automaton has 17254 states and 19721 transitions. Word has length 465 [2019-11-23 21:24:59,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:24:59,158 INFO L462 AbstractCegarLoop]: Abstraction has 17254 states and 19721 transitions. [2019-11-23 21:24:59,158 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:24:59,158 INFO L276 IsEmpty]: Start isEmpty. Operand 17254 states and 19721 transitions. [2019-11-23 21:24:59,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 467 [2019-11-23 21:24:59,167 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:24:59,168 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, 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, 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] [2019-11-23 21:24:59,383 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:24:59,383 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:24:59,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:24:59,384 INFO L82 PathProgramCache]: Analyzing trace with hash 1982211466, now seen corresponding path program 1 times [2019-11-23 21:24:59,384 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:24:59,384 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745707147] [2019-11-23 21:24:59,385 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:24:59,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:24:59,864 INFO L134 CoverageAnalysis]: Checked inductivity of 567 backedges. 407 proven. 3 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2019-11-23 21:24:59,865 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745707147] [2019-11-23 21:24:59,865 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424825389] [2019-11-23 21:24:59,865 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 21:24:59,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:24:59,997 INFO L255 TraceCheckSpWp]: Trace formula consists of 601 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:25:00,007 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:25:00,148 INFO L134 CoverageAnalysis]: Checked inductivity of 567 backedges. 420 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2019-11-23 21:25:00,148 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:25:00,149 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2019-11-23 21:25:00,150 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193953830] [2019-11-23 21:25:00,150 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:25:00,151 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:25:00,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:25:00,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:25:00,153 INFO L87 Difference]: Start difference. First operand 17254 states and 19721 transitions. Second operand 3 states. [2019-11-23 21:25:03,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:25:03,712 INFO L93 Difference]: Finished difference Result 42096 states and 49000 transitions. [2019-11-23 21:25:03,712 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:25:03,713 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 466 [2019-11-23 21:25:03,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:25:03,741 INFO L225 Difference]: With dead ends: 42096 [2019-11-23 21:25:03,741 INFO L226 Difference]: Without dead ends: 22774 [2019-11-23 21:25:03,760 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 465 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:25:03,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22774 states. [2019-11-23 21:25:03,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22774 to 22774. [2019-11-23 21:25:03,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22774 states. [2019-11-23 21:25:04,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22774 states to 22774 states and 24045 transitions. [2019-11-23 21:25:04,017 INFO L78 Accepts]: Start accepts. Automaton has 22774 states and 24045 transitions. Word has length 466 [2019-11-23 21:25:04,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:25:04,018 INFO L462 AbstractCegarLoop]: Abstraction has 22774 states and 24045 transitions. [2019-11-23 21:25:04,018 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:25:04,018 INFO L276 IsEmpty]: Start isEmpty. Operand 22774 states and 24045 transitions. [2019-11-23 21:25:04,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1145 [2019-11-23 21:25:04,122 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:25:04,124 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:25:04,337 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:25:04,337 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:25:04,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:25:04,338 INFO L82 PathProgramCache]: Analyzing trace with hash -217245603, now seen corresponding path program 1 times [2019-11-23 21:25:04,338 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:25:04,338 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86193874] [2019-11-23 21:25:04,339 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:25:04,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:25:06,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1083 backedges. 756 proven. 0 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2019-11-23 21:25:06,044 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86193874] [2019-11-23 21:25:06,050 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:25:06,050 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:25:06,051 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676209237] [2019-11-23 21:25:06,054 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:25:06,054 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:25:06,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:25:06,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:25:06,055 INFO L87 Difference]: Start difference. First operand 22774 states and 24045 transitions. Second operand 4 states. [2019-11-23 21:25:10,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:25:10,402 INFO L93 Difference]: Finished difference Result 55206 states and 58323 transitions. [2019-11-23 21:25:10,402 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:25:10,402 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 1144 [2019-11-23 21:25:10,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:25:10,441 INFO L225 Difference]: With dead ends: 55206 [2019-11-23 21:25:10,441 INFO L226 Difference]: Without dead ends: 33124 [2019-11-23 21:25:10,460 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 21:25:10,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33124 states. [2019-11-23 21:25:10,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33124 to 32434. [2019-11-23 21:25:10,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32434 states. [2019-11-23 21:25:10,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32434 states to 32434 states and 33863 transitions. [2019-11-23 21:25:10,907 INFO L78 Accepts]: Start accepts. Automaton has 32434 states and 33863 transitions. Word has length 1144 [2019-11-23 21:25:10,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:25:10,908 INFO L462 AbstractCegarLoop]: Abstraction has 32434 states and 33863 transitions. [2019-11-23 21:25:10,908 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:25:10,908 INFO L276 IsEmpty]: Start isEmpty. Operand 32434 states and 33863 transitions. [2019-11-23 21:25:10,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1159 [2019-11-23 21:25:10,929 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:25:10,931 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:25:10,932 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:25:10,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:25:10,932 INFO L82 PathProgramCache]: Analyzing trace with hash 893272154, now seen corresponding path program 1 times [2019-11-23 21:25:10,932 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:25:10,933 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961316844] [2019-11-23 21:25:10,933 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:25:11,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:25:14,207 INFO L134 CoverageAnalysis]: Checked inductivity of 1125 backedges. 90 proven. 636 refuted. 0 times theorem prover too weak. 399 trivial. 0 not checked. [2019-11-23 21:25:14,207 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961316844] [2019-11-23 21:25:14,207 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611186822] [2019-11-23 21:25:14,207 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 21:25:14,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:25:14,497 INFO L255 TraceCheckSpWp]: Trace formula consists of 1312 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:25:14,509 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:25:15,116 INFO L134 CoverageAnalysis]: Checked inductivity of 1125 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 1006 trivial. 0 not checked. [2019-11-23 21:25:15,116 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:25:15,117 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 10 [2019-11-23 21:25:15,117 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550182054] [2019-11-23 21:25:15,118 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:25:15,118 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:25:15,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:25:15,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2019-11-23 21:25:15,118 INFO L87 Difference]: Start difference. First operand 32434 states and 33863 transitions. Second operand 3 states. [2019-11-23 21:25:17,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:25:17,602 INFO L93 Difference]: Finished difference Result 64176 states and 67033 transitions. [2019-11-23 21:25:17,602 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:25:17,602 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1158 [2019-11-23 21:25:17,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:25:17,645 INFO L225 Difference]: With dead ends: 64176 [2019-11-23 21:25:17,645 INFO L226 Difference]: Without dead ends: 32434 [2019-11-23 21:25:17,665 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 1168 GetRequests, 1159 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2019-11-23 21:25:17,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32434 states. [2019-11-23 21:25:17,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32434 to 32434. [2019-11-23 21:25:17,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32434 states. [2019-11-23 21:25:18,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32434 states to 32434 states and 33723 transitions. [2019-11-23 21:25:18,187 INFO L78 Accepts]: Start accepts. Automaton has 32434 states and 33723 transitions. Word has length 1158 [2019-11-23 21:25:18,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:25:18,187 INFO L462 AbstractCegarLoop]: Abstraction has 32434 states and 33723 transitions. [2019-11-23 21:25:18,187 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:25:18,187 INFO L276 IsEmpty]: Start isEmpty. Operand 32434 states and 33723 transitions. [2019-11-23 21:25:18,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1165 [2019-11-23 21:25:18,205 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:25:18,207 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, 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, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:25:18,410 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:25:18,410 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:25:18,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:25:18,414 INFO L82 PathProgramCache]: Analyzing trace with hash 241423515, now seen corresponding path program 1 times [2019-11-23 21:25:18,414 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:25:18,415 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837872929] [2019-11-23 21:25:18,416 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:25:18,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:25:20,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1003 backedges. 62 proven. 642 refuted. 0 times theorem prover too weak. 299 trivial. 0 not checked. [2019-11-23 21:25:20,694 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837872929] [2019-11-23 21:25:20,694 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878542402] [2019-11-23 21:25:20,694 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:25:21,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:25:21,737 INFO L255 TraceCheckSpWp]: Trace formula consists of 1299 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:25:21,748 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:25:22,215 INFO L134 CoverageAnalysis]: Checked inductivity of 1003 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 912 trivial. 0 not checked. [2019-11-23 21:25:22,216 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:25:22,216 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2019-11-23 21:25:22,216 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341098561] [2019-11-23 21:25:22,217 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:25:22,217 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:25:22,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:25:22,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-23 21:25:22,218 INFO L87 Difference]: Start difference. First operand 32434 states and 33723 transitions. Second operand 3 states. [2019-11-23 21:25:24,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:25:24,741 INFO L93 Difference]: Finished difference Result 70386 states and 73435 transitions. [2019-11-23 21:25:24,742 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:25:24,742 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1164 [2019-11-23 21:25:24,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:25:24,780 INFO L225 Difference]: With dead ends: 70386 [2019-11-23 21:25:24,781 INFO L226 Difference]: Without dead ends: 38644 [2019-11-23 21:25:24,802 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 1173 GetRequests, 1166 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-23 21:25:24,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38644 states. [2019-11-23 21:25:25,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38644 to 38644. [2019-11-23 21:25:25,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38644 states. [2019-11-23 21:25:25,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38644 states to 38644 states and 40057 transitions. [2019-11-23 21:25:25,155 INFO L78 Accepts]: Start accepts. Automaton has 38644 states and 40057 transitions. Word has length 1164 [2019-11-23 21:25:25,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:25:25,156 INFO L462 AbstractCegarLoop]: Abstraction has 38644 states and 40057 transitions. [2019-11-23 21:25:25,156 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:25:25,156 INFO L276 IsEmpty]: Start isEmpty. Operand 38644 states and 40057 transitions. [2019-11-23 21:25:25,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1198 [2019-11-23 21:25:25,172 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:25:25,173 INFO L410 BasicCegarLoop]: trace histogram [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, 6, 6, 6, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:25:25,377 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:25:25,377 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:25:25,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:25:25,378 INFO L82 PathProgramCache]: Analyzing trace with hash 900019768, now seen corresponding path program 1 times [2019-11-23 21:25:25,379 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:25:25,379 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771490153] [2019-11-23 21:25:25,379 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:25:25,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:25:26,534 INFO L134 CoverageAnalysis]: Checked inductivity of 1590 backedges. 179 proven. 0 refuted. 0 times theorem prover too weak. 1411 trivial. 0 not checked. [2019-11-23 21:25:26,534 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771490153] [2019-11-23 21:25:26,534 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:25:26,534 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:25:26,534 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419864605] [2019-11-23 21:25:26,537 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:25:26,538 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:25:26,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:25:26,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 21:25:26,538 INFO L87 Difference]: Start difference. First operand 38644 states and 40057 transitions. Second operand 3 states. [2019-11-23 21:25:29,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:25:29,220 INFO L93 Difference]: Finished difference Result 86946 states and 90642 transitions. [2019-11-23 21:25:29,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:25:29,221 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 1197 [2019-11-23 21:25:29,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:25:29,271 INFO L225 Difference]: With dead ends: 86946 [2019-11-23 21:25:29,272 INFO L226 Difference]: Without dead ends: 48994 [2019-11-23 21:25:29,296 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 3 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 21:25:29,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48994 states. [2019-11-23 21:25:29,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48994 to 46924. [2019-11-23 21:25:29,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46924 states. [2019-11-23 21:25:29,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46924 states to 46924 states and 48957 transitions. [2019-11-23 21:25:29,657 INFO L78 Accepts]: Start accepts. Automaton has 46924 states and 48957 transitions. Word has length 1197 [2019-11-23 21:25:29,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:25:29,658 INFO L462 AbstractCegarLoop]: Abstraction has 46924 states and 48957 transitions. [2019-11-23 21:25:29,659 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:25:29,659 INFO L276 IsEmpty]: Start isEmpty. Operand 46924 states and 48957 transitions. [2019-11-23 21:25:29,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1558 [2019-11-23 21:25:29,699 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:25:29,700 INFO L410 BasicCegarLoop]: trace histogram [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, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 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, 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, 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, 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, 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, 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] [2019-11-23 21:25:29,700 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:25:29,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:25:29,701 INFO L82 PathProgramCache]: Analyzing trace with hash -1066010055, now seen corresponding path program 1 times [2019-11-23 21:25:29,701 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:25:29,701 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864162911] [2019-11-23 21:25:29,701 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:25:29,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:25:32,131 INFO L134 CoverageAnalysis]: Checked inductivity of 2293 backedges. 1658 proven. 0 refuted. 0 times theorem prover too weak. 635 trivial. 0 not checked. [2019-11-23 21:25:32,131 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864162911] [2019-11-23 21:25:32,132 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:25:32,132 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:25:32,132 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060243345] [2019-11-23 21:25:32,133 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:25:32,134 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:25:32,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:25:32,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:25:32,134 INFO L87 Difference]: Start difference. First operand 46924 states and 48957 transitions. Second operand 4 states.