/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/Problem14_label51.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 21:13:04,516 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 21:13:04,522 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 21:13:04,540 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-23 21:13:04,605 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 21:13:04,624 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 21:13:04,624 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 21:13:04,626 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 21:13:04,627 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 21:13:04,627 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 21:13:04,627 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 21:13:04,627 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 21:13:04,627 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 21:13:04,628 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 21:13:04,628 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 21:13:04,629 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 21:13:04,629 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 21:13:04,629 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 21:13:04,630 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 21:13:04,630 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 21:13:04,630 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 21:13:04,631 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 21:13:04,631 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 21:13:04,631 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 21:13:04,631 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 21:13:04,632 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 21:13:04,632 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 21:13:04,632 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 21:13:04,632 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 21:13:04,632 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 21:13:04,633 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 21:13:04,633 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 21:13:04,633 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 21:13:04,633 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 21:13:04,633 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 21:13:04,889 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 21:13:04,911 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 21:13:04,915 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 21:13:04,917 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 21:13:04,917 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 21:13:04,918 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label51.c [2019-11-23 21:13:04,985 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e4457b9f6/7b9f4f36baf94b0abdd9c44efdfa8487/FLAGbe026d9a8 [2019-11-23 21:13:05,595 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 21:13:05,597 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label51.c [2019-11-23 21:13:05,615 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e4457b9f6/7b9f4f36baf94b0abdd9c44efdfa8487/FLAGbe026d9a8 [2019-11-23 21:13:05,832 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e4457b9f6/7b9f4f36baf94b0abdd9c44efdfa8487 [2019-11-23 21:13:05,840 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 21:13:05,841 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 21:13:05,842 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 21:13:05,842 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 21:13:05,846 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 21:13:05,846 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:13:05" (1/1) ... [2019-11-23 21:13:05,850 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@390d34f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:13:05, skipping insertion in model container [2019-11-23 21:13:05,850 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:13:05" (1/1) ... [2019-11-23 21:13:05,858 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 21:13:05,926 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 21:13:06,513 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 21:13:06,517 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 21:13:06,635 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 21:13:06,655 INFO L208 MainTranslator]: Completed translation [2019-11-23 21:13:06,656 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:13:06 WrapperNode [2019-11-23 21:13:06,656 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 21:13:06,657 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 21:13:06,657 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 21:13:06,657 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 21:13:06,665 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:13:06" (1/1) ... [2019-11-23 21:13:06,688 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:13:06" (1/1) ... [2019-11-23 21:13:06,773 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 21:13:06,773 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 21:13:06,773 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 21:13:06,774 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 21:13:06,784 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:13:06" (1/1) ... [2019-11-23 21:13:06,784 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:13:06" (1/1) ... [2019-11-23 21:13:06,799 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:13:06" (1/1) ... [2019-11-23 21:13:06,799 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:13:06" (1/1) ... [2019-11-23 21:13:06,843 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:13:06" (1/1) ... [2019-11-23 21:13:06,872 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:13:06" (1/1) ... [2019-11-23 21:13:06,887 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:13:06" (1/1) ... [2019-11-23 21:13:06,897 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 21:13:06,898 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 21:13:06,898 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 21:13:06,898 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 21:13:06,899 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:13:06" (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 21:13:06,965 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 21:13:06,966 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 21:13:08,602 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 21:13:08,603 INFO L284 CfgBuilder]: Removed 7 assume(true) statements. [2019-11-23 21:13:08,604 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:13:08 BoogieIcfgContainer [2019-11-23 21:13:08,604 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 21:13:08,606 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 21:13:08,606 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 21:13:08,609 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 21:13:08,609 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:13:05" (1/3) ... [2019-11-23 21:13:08,610 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4683a075 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:13:08, skipping insertion in model container [2019-11-23 21:13:08,610 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:13:06" (2/3) ... [2019-11-23 21:13:08,611 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4683a075 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:13:08, skipping insertion in model container [2019-11-23 21:13:08,611 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:13:08" (3/3) ... [2019-11-23 21:13:08,612 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label51.c [2019-11-23 21:13:08,622 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 21:13:08,629 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 21:13:08,641 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 21:13:08,668 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 21:13:08,668 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 21:13:08,668 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 21:13:08,668 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 21:13:08,669 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 21:13:08,669 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 21:13:08,669 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 21:13:08,669 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 21:13:08,696 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states. [2019-11-23 21:13:08,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-23 21:13:08,706 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:13:08,707 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] [2019-11-23 21:13:08,708 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:13:08,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:13:08,715 INFO L82 PathProgramCache]: Analyzing trace with hash -596708735, now seen corresponding path program 1 times [2019-11-23 21:13:08,725 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:13:08,726 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753951277] [2019-11-23 21:13:08,726 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:13:08,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:13:08,962 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 21:13:08,963 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753951277] [2019-11-23 21:13:08,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:13:08,964 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:13:08,967 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549968673] [2019-11-23 21:13:08,973 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:13:08,973 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:13:08,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:13:08,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:13:08,990 INFO L87 Difference]: Start difference. First operand 245 states. Second operand 4 states. [2019-11-23 21:13:10,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:13:10,789 INFO L93 Difference]: Finished difference Result 866 states and 1574 transitions. [2019-11-23 21:13:10,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:13:10,791 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 35 [2019-11-23 21:13:10,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:13:10,830 INFO L225 Difference]: With dead ends: 866 [2019-11-23 21:13:10,830 INFO L226 Difference]: Without dead ends: 538 [2019-11-23 21:13:10,842 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 21:13:10,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2019-11-23 21:13:10,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 538. [2019-11-23 21:13:10,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 538 states. [2019-11-23 21:13:10,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 754 transitions. [2019-11-23 21:13:10,962 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 754 transitions. Word has length 35 [2019-11-23 21:13:10,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:13:10,962 INFO L462 AbstractCegarLoop]: Abstraction has 538 states and 754 transitions. [2019-11-23 21:13:10,962 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:13:10,963 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 754 transitions. [2019-11-23 21:13:10,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2019-11-23 21:13:10,972 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:13:10,972 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, 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] [2019-11-23 21:13:10,972 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:13:10,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:13:10,973 INFO L82 PathProgramCache]: Analyzing trace with hash -545911462, now seen corresponding path program 1 times [2019-11-23 21:13:10,973 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:13:10,973 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777014133] [2019-11-23 21:13:10,974 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:13:11,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:13:11,545 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:13:11,546 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777014133] [2019-11-23 21:13:11,546 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:13:11,546 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-23 21:13:11,546 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134177822] [2019-11-23 21:13:11,549 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 21:13:11,550 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:13:11,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 21:13:11,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:13:11,551 INFO L87 Difference]: Start difference. First operand 538 states and 754 transitions. Second operand 6 states. [2019-11-23 21:13:13,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:13:13,532 INFO L93 Difference]: Finished difference Result 1964 states and 2764 transitions. [2019-11-23 21:13:13,533 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:13:13,533 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 143 [2019-11-23 21:13:13,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:13:13,542 INFO L225 Difference]: With dead ends: 1964 [2019-11-23 21:13:13,542 INFO L226 Difference]: Without dead ends: 1428 [2019-11-23 21:13:13,544 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-11-23 21:13:13,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1428 states. [2019-11-23 21:13:13,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1428 to 1428. [2019-11-23 21:13:13,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1428 states. [2019-11-23 21:13:13,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1428 states to 1428 states and 1849 transitions. [2019-11-23 21:13:13,584 INFO L78 Accepts]: Start accepts. Automaton has 1428 states and 1849 transitions. Word has length 143 [2019-11-23 21:13:13,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:13:13,585 INFO L462 AbstractCegarLoop]: Abstraction has 1428 states and 1849 transitions. [2019-11-23 21:13:13,585 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 21:13:13,585 INFO L276 IsEmpty]: Start isEmpty. Operand 1428 states and 1849 transitions. [2019-11-23 21:13:13,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2019-11-23 21:13:13,590 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:13:13,590 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 21:13:13,590 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:13:13,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:13:13,591 INFO L82 PathProgramCache]: Analyzing trace with hash 1795619338, now seen corresponding path program 1 times [2019-11-23 21:13:13,591 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:13:13,592 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478658585] [2019-11-23 21:13:13,592 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:13:13,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:13:13,764 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 97 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-11-23 21:13:13,764 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478658585] [2019-11-23 21:13:13,765 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:13:13,766 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:13:13,766 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882549812] [2019-11-23 21:13:13,768 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:13:13,769 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:13:13,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:13:13,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:13:13,771 INFO L87 Difference]: Start difference. First operand 1428 states and 1849 transitions. Second operand 4 states. [2019-11-23 21:13:15,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:13:15,082 INFO L93 Difference]: Finished difference Result 3922 states and 5314 transitions. [2019-11-23 21:13:15,083 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:13:15,083 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 209 [2019-11-23 21:13:15,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:13:15,096 INFO L225 Difference]: With dead ends: 3922 [2019-11-23 21:13:15,096 INFO L226 Difference]: Without dead ends: 2674 [2019-11-23 21:13:15,098 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 21:13:15,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2674 states. [2019-11-23 21:13:15,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2674 to 2318. [2019-11-23 21:13:15,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2318 states. [2019-11-23 21:13:15,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2318 states to 2318 states and 2951 transitions. [2019-11-23 21:13:15,153 INFO L78 Accepts]: Start accepts. Automaton has 2318 states and 2951 transitions. Word has length 209 [2019-11-23 21:13:15,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:13:15,154 INFO L462 AbstractCegarLoop]: Abstraction has 2318 states and 2951 transitions. [2019-11-23 21:13:15,154 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:13:15,154 INFO L276 IsEmpty]: Start isEmpty. Operand 2318 states and 2951 transitions. [2019-11-23 21:13:15,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2019-11-23 21:13:15,158 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:13:15,159 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-23 21:13:15,159 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:13:15,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:13:15,160 INFO L82 PathProgramCache]: Analyzing trace with hash -853230355, now seen corresponding path program 1 times [2019-11-23 21:13:15,160 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:13:15,160 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980862282] [2019-11-23 21:13:15,160 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:13:15,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:13:15,457 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 136 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 21:13:15,458 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980862282] [2019-11-23 21:13:15,458 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618910538] [2019-11-23 21:13:15,459 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 21:13:15,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:13:15,560 INFO L255 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:13:15,585 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:13:15,678 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2019-11-23 21:13:15,678 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:13:15,679 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2019-11-23 21:13:15,680 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680885138] [2019-11-23 21:13:15,680 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:13:15,682 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:13:15,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:13:15,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:13:15,682 INFO L87 Difference]: Start difference. First operand 2318 states and 2951 transitions. Second operand 3 states. [2019-11-23 21:13:16,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:13:16,552 INFO L93 Difference]: Finished difference Result 4456 states and 5716 transitions. [2019-11-23 21:13:16,553 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:13:16,553 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 223 [2019-11-23 21:13:16,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:13:16,563 INFO L225 Difference]: With dead ends: 4456 [2019-11-23 21:13:16,564 INFO L226 Difference]: Without dead ends: 2318 [2019-11-23 21:13:16,567 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 222 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 21:13:16,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2318 states. [2019-11-23 21:13:16,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2318 to 2318. [2019-11-23 21:13:16,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2318 states. [2019-11-23 21:13:16,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2318 states to 2318 states and 2817 transitions. [2019-11-23 21:13:16,616 INFO L78 Accepts]: Start accepts. Automaton has 2318 states and 2817 transitions. Word has length 223 [2019-11-23 21:13:16,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:13:16,617 INFO L462 AbstractCegarLoop]: Abstraction has 2318 states and 2817 transitions. [2019-11-23 21:13:16,617 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:13:16,617 INFO L276 IsEmpty]: Start isEmpty. Operand 2318 states and 2817 transitions. [2019-11-23 21:13:16,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2019-11-23 21:13:16,623 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:13:16,624 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:13:16,829 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:13:16,829 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:13:16,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:13:16,829 INFO L82 PathProgramCache]: Analyzing trace with hash -993849494, now seen corresponding path program 1 times [2019-11-23 21:13:16,830 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:13:16,830 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162977103] [2019-11-23 21:13:16,830 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:13:16,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:13:17,104 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 233 proven. 4 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-11-23 21:13:17,104 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162977103] [2019-11-23 21:13:17,104 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123192108] [2019-11-23 21:13:17,104 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 21:13:17,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:13:17,196 INFO L255 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:13:17,202 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:13:17,307 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 98 proven. 0 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2019-11-23 21:13:17,307 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:13:17,307 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2019-11-23 21:13:17,308 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513331077] [2019-11-23 21:13:17,308 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:13:17,309 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:13:17,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:13:17,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:13:17,309 INFO L87 Difference]: Start difference. First operand 2318 states and 2817 transitions. Second operand 3 states. [2019-11-23 21:13:18,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:13:18,110 INFO L93 Difference]: Finished difference Result 5880 states and 7234 transitions. [2019-11-23 21:13:18,111 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:13:18,111 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 292 [2019-11-23 21:13:18,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:13:18,126 INFO L225 Difference]: With dead ends: 5880 [2019-11-23 21:13:18,126 INFO L226 Difference]: Without dead ends: 3742 [2019-11-23 21:13:18,130 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 291 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 21:13:18,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3742 states. [2019-11-23 21:13:18,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3742 to 3564. [2019-11-23 21:13:18,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3564 states. [2019-11-23 21:13:18,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3564 states to 3564 states and 4207 transitions. [2019-11-23 21:13:18,191 INFO L78 Accepts]: Start accepts. Automaton has 3564 states and 4207 transitions. Word has length 292 [2019-11-23 21:13:18,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:13:18,192 INFO L462 AbstractCegarLoop]: Abstraction has 3564 states and 4207 transitions. [2019-11-23 21:13:18,192 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:13:18,192 INFO L276 IsEmpty]: Start isEmpty. Operand 3564 states and 4207 transitions. [2019-11-23 21:13:18,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2019-11-23 21:13:18,198 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:13:18,199 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:13:18,407 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:13:18,407 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:13:18,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:13:18,408 INFO L82 PathProgramCache]: Analyzing trace with hash -1870613307, now seen corresponding path program 1 times [2019-11-23 21:13:18,408 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:13:18,409 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712674620] [2019-11-23 21:13:18,409 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:13:18,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:13:18,737 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 244 proven. 4 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2019-11-23 21:13:18,738 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712674620] [2019-11-23 21:13:18,740 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313243276] [2019-11-23 21:13:18,742 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 21:13:18,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:13:18,825 INFO L255 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:13:18,830 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:13:18,894 INFO L134 CoverageAnalysis]: Checked inductivity of 338 backedges. 98 proven. 0 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2019-11-23 21:13:18,894 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:13:18,894 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2019-11-23 21:13:18,895 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017664693] [2019-11-23 21:13:18,895 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:13:18,896 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:13:18,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:13:18,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:13:18,896 INFO L87 Difference]: Start difference. First operand 3564 states and 4207 transitions. Second operand 3 states. [2019-11-23 21:13:19,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:13:19,798 INFO L93 Difference]: Finished difference Result 7838 states and 9371 transitions. [2019-11-23 21:13:19,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:13:19,799 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 305 [2019-11-23 21:13:19,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:13:19,815 INFO L225 Difference]: With dead ends: 7838 [2019-11-23 21:13:19,815 INFO L226 Difference]: Without dead ends: 4454 [2019-11-23 21:13:19,821 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 304 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 21:13:19,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4454 states. [2019-11-23 21:13:19,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4454 to 4454. [2019-11-23 21:13:19,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4454 states. [2019-11-23 21:13:19,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4454 states to 4454 states and 5193 transitions. [2019-11-23 21:13:19,890 INFO L78 Accepts]: Start accepts. Automaton has 4454 states and 5193 transitions. Word has length 305 [2019-11-23 21:13:19,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:13:19,899 INFO L462 AbstractCegarLoop]: Abstraction has 4454 states and 5193 transitions. [2019-11-23 21:13:19,899 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:13:19,900 INFO L276 IsEmpty]: Start isEmpty. Operand 4454 states and 5193 transitions. [2019-11-23 21:13:19,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2019-11-23 21:13:19,908 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:13:19,908 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 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 21:13:20,114 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:13:20,114 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:13:20,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:13:20,115 INFO L82 PathProgramCache]: Analyzing trace with hash 438066137, now seen corresponding path program 1 times [2019-11-23 21:13:20,116 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:13:20,116 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900063813] [2019-11-23 21:13:20,117 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:13:20,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:13:20,443 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 244 proven. 4 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2019-11-23 21:13:20,444 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900063813] [2019-11-23 21:13:20,444 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123855978] [2019-11-23 21:13:20,444 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 21:13:20,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:13:20,628 INFO L255 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:13:20,633 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:13:20,704 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 98 proven. 0 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2019-11-23 21:13:20,704 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:13:20,704 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2019-11-23 21:13:20,705 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749202514] [2019-11-23 21:13:20,705 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:13:20,705 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:13:20,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:13:20,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:13:20,707 INFO L87 Difference]: Start difference. First operand 4454 states and 5193 transitions. Second operand 3 states. [2019-11-23 21:13:21,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:13:21,423 INFO L93 Difference]: Finished difference Result 9974 states and 11706 transitions. [2019-11-23 21:13:21,423 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:13:21,424 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 313 [2019-11-23 21:13:21,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:13:21,439 INFO L225 Difference]: With dead ends: 9974 [2019-11-23 21:13:21,439 INFO L226 Difference]: Without dead ends: 4988 [2019-11-23 21:13:21,443 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 312 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 21:13:21,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4988 states. [2019-11-23 21:13:21,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4988 to 3920. [2019-11-23 21:13:21,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3920 states. [2019-11-23 21:13:21,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3920 states to 3920 states and 4561 transitions. [2019-11-23 21:13:21,509 INFO L78 Accepts]: Start accepts. Automaton has 3920 states and 4561 transitions. Word has length 313 [2019-11-23 21:13:21,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:13:21,509 INFO L462 AbstractCegarLoop]: Abstraction has 3920 states and 4561 transitions. [2019-11-23 21:13:21,509 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:13:21,509 INFO L276 IsEmpty]: Start isEmpty. Operand 3920 states and 4561 transitions. [2019-11-23 21:13:21,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2019-11-23 21:13:21,516 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:13:21,516 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:13:21,719 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:13:21,719 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:13:21,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:13:21,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1982666170, now seen corresponding path program 1 times [2019-11-23 21:13:21,720 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:13:21,720 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097229366] [2019-11-23 21:13:21,720 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:13:21,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:13:22,006 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 244 proven. 4 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2019-11-23 21:13:22,007 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097229366] [2019-11-23 21:13:22,007 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407401840] [2019-11-23 21:13:22,007 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 21:13:22,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:13:22,099 INFO L255 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 21:13:22,104 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:13:22,204 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 248 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2019-11-23 21:13:22,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:13:22,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2019-11-23 21:13:22,205 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139948960] [2019-11-23 21:13:22,206 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:13:22,206 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:13:22,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:13:22,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:13:22,207 INFO L87 Difference]: Start difference. First operand 3920 states and 4561 transitions. Second operand 4 states. [2019-11-23 21:13:23,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:13:23,347 INFO L93 Difference]: Finished difference Result 7689 states and 8958 transitions. [2019-11-23 21:13:23,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:13:23,347 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 324 [2019-11-23 21:13:23,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:13:23,368 INFO L225 Difference]: With dead ends: 7689 [2019-11-23 21:13:23,369 INFO L226 Difference]: Without dead ends: 4098 [2019-11-23 21:13:23,374 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 323 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 21:13:23,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4098 states. [2019-11-23 21:13:23,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4098 to 3920. [2019-11-23 21:13:23,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3920 states. [2019-11-23 21:13:23,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3920 states to 3920 states and 4186 transitions. [2019-11-23 21:13:23,506 INFO L78 Accepts]: Start accepts. Automaton has 3920 states and 4186 transitions. Word has length 324 [2019-11-23 21:13:23,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:13:23,506 INFO L462 AbstractCegarLoop]: Abstraction has 3920 states and 4186 transitions. [2019-11-23 21:13:23,507 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:13:23,507 INFO L276 IsEmpty]: Start isEmpty. Operand 3920 states and 4186 transitions. [2019-11-23 21:13:23,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2019-11-23 21:13:23,513 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:13:23,514 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, 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, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:13:23,727 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:13:23,727 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:13:23,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:13:23,728 INFO L82 PathProgramCache]: Analyzing trace with hash 1057538892, now seen corresponding path program 1 times [2019-11-23 21:13:23,728 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:13:23,728 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707954504] [2019-11-23 21:13:23,729 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:13:23,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:13:24,593 INFO L134 CoverageAnalysis]: Checked inductivity of 643 backedges. 411 proven. 65 refuted. 0 times theorem prover too weak. 167 trivial. 0 not checked. [2019-11-23 21:13:24,594 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707954504] [2019-11-23 21:13:24,594 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704123537] [2019-11-23 21:13:24,594 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:13:24,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:13:24,733 INFO L255 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 21:13:24,740 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:13:25,177 INFO L134 CoverageAnalysis]: Checked inductivity of 643 backedges. 491 proven. 0 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2019-11-23 21:13:25,177 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:13:25,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 11 [2019-11-23 21:13:25,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2508505] [2019-11-23 21:13:25,179 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 21:13:25,180 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:13:25,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 21:13:25,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-11-23 21:13:25,181 INFO L87 Difference]: Start difference. First operand 3920 states and 4186 transitions. Second operand 7 states. [2019-11-23 21:13:26,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:13:26,117 INFO L93 Difference]: Finished difference Result 7710 states and 8241 transitions. [2019-11-23 21:13:26,118 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 21:13:26,118 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 419 [2019-11-23 21:13:26,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:13:26,132 INFO L225 Difference]: With dead ends: 7710 [2019-11-23 21:13:26,132 INFO L226 Difference]: Without dead ends: 4098 [2019-11-23 21:13:26,136 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 414 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-11-23 21:13:26,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4098 states. [2019-11-23 21:13:26,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4098 to 3920. [2019-11-23 21:13:26,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3920 states. [2019-11-23 21:13:26,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3920 states to 3920 states and 4116 transitions. [2019-11-23 21:13:26,190 INFO L78 Accepts]: Start accepts. Automaton has 3920 states and 4116 transitions. Word has length 419 [2019-11-23 21:13:26,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:13:26,190 INFO L462 AbstractCegarLoop]: Abstraction has 3920 states and 4116 transitions. [2019-11-23 21:13:26,190 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 21:13:26,191 INFO L276 IsEmpty]: Start isEmpty. Operand 3920 states and 4116 transitions. [2019-11-23 21:13:26,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 750 [2019-11-23 21:13:26,201 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:13:26,201 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, 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, 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, 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] [2019-11-23 21:13:26,413 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:13:26,413 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:13:26,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:13:26,414 INFO L82 PathProgramCache]: Analyzing trace with hash 798665016, now seen corresponding path program 1 times [2019-11-23 21:13:26,415 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:13:26,415 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737188056] [2019-11-23 21:13:26,415 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:13:26,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:13:27,354 INFO L134 CoverageAnalysis]: Checked inductivity of 1638 backedges. 1190 proven. 0 refuted. 0 times theorem prover too weak. 448 trivial. 0 not checked. [2019-11-23 21:13:27,355 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737188056] [2019-11-23 21:13:27,355 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:13:27,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 21:13:27,358 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801120137] [2019-11-23 21:13:27,359 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:13:27,359 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:13:27,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:13:27,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:13:27,360 INFO L87 Difference]: Start difference. First operand 3920 states and 4116 transitions. Second operand 4 states. [2019-11-23 21:13:28,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:13:28,272 INFO L93 Difference]: Finished difference Result 8906 states and 9424 transitions. [2019-11-23 21:13:28,272 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:13:28,272 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 749 [2019-11-23 21:13:28,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:13:28,286 INFO L225 Difference]: With dead ends: 8906 [2019-11-23 21:13:28,286 INFO L226 Difference]: Without dead ends: 5166 [2019-11-23 21:13:28,291 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 21:13:28,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5166 states. [2019-11-23 21:13:28,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5166 to 4988. [2019-11-23 21:13:28,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4988 states. [2019-11-23 21:13:28,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4988 states to 4988 states and 5242 transitions. [2019-11-23 21:13:28,355 INFO L78 Accepts]: Start accepts. Automaton has 4988 states and 5242 transitions. Word has length 749 [2019-11-23 21:13:28,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:13:28,356 INFO L462 AbstractCegarLoop]: Abstraction has 4988 states and 5242 transitions. [2019-11-23 21:13:28,356 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:13:28,356 INFO L276 IsEmpty]: Start isEmpty. Operand 4988 states and 5242 transitions. [2019-11-23 21:13:28,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 798 [2019-11-23 21:13:28,366 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:13:28,366 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:13:28,367 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:13:28,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:13:28,367 INFO L82 PathProgramCache]: Analyzing trace with hash 738870712, now seen corresponding path program 1 times [2019-11-23 21:13:28,367 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:13:28,368 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608732296] [2019-11-23 21:13:28,368 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:13:28,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:13:29,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1728 backedges. 989 proven. 4 refuted. 0 times theorem prover too weak. 735 trivial. 0 not checked. [2019-11-23 21:13:29,667 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608732296] [2019-11-23 21:13:29,667 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588975237] [2019-11-23 21:13:29,667 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:13:29,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:13:29,863 INFO L255 TraceCheckSpWp]: Trace formula consists of 975 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-23 21:13:29,872 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:13:30,520 INFO L134 CoverageAnalysis]: Checked inductivity of 1728 backedges. 197 proven. 0 refuted. 0 times theorem prover too weak. 1531 trivial. 0 not checked. [2019-11-23 21:13:30,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-23 21:13:30,521 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2019-11-23 21:13:30,522 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408382811] [2019-11-23 21:13:30,524 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 21:13:30,531 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:13:30,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 21:13:30,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-23 21:13:30,532 INFO L87 Difference]: Start difference. First operand 4988 states and 5242 transitions. Second operand 3 states. [2019-11-23 21:13:31,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:13:31,167 INFO L93 Difference]: Finished difference Result 9796 states and 10306 transitions. [2019-11-23 21:13:31,167 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 21:13:31,168 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 797 [2019-11-23 21:13:31,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:13:31,182 INFO L225 Difference]: With dead ends: 9796 [2019-11-23 21:13:31,182 INFO L226 Difference]: Without dead ends: 5166 [2019-11-23 21:13:31,186 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 801 GetRequests, 796 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-23 21:13:31,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5166 states. [2019-11-23 21:13:31,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5166 to 4810. [2019-11-23 21:13:31,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4810 states. [2019-11-23 21:13:31,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4810 states to 4810 states and 5033 transitions. [2019-11-23 21:13:31,256 INFO L78 Accepts]: Start accepts. Automaton has 4810 states and 5033 transitions. Word has length 797 [2019-11-23 21:13:31,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:13:31,256 INFO L462 AbstractCegarLoop]: Abstraction has 4810 states and 5033 transitions. [2019-11-23 21:13:31,257 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 21:13:31,257 INFO L276 IsEmpty]: Start isEmpty. Operand 4810 states and 5033 transitions. [2019-11-23 21:13:31,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 821 [2019-11-23 21:13:31,266 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:13:31,267 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, 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, 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, 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] [2019-11-23 21:13:31,470 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:13:31,471 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:13:31,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:13:31,472 INFO L82 PathProgramCache]: Analyzing trace with hash -1407042162, now seen corresponding path program 1 times [2019-11-23 21:13:31,472 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:13:31,472 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351940072] [2019-11-23 21:13:31,472 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:13:31,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:13:32,473 INFO L134 CoverageAnalysis]: Checked inductivity of 1796 backedges. 1011 proven. 4 refuted. 0 times theorem prover too weak. 781 trivial. 0 not checked. [2019-11-23 21:13:32,474 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351940072] [2019-11-23 21:13:32,474 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573951251] [2019-11-23 21:13:32,474 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:13:32,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:13:32,682 INFO L255 TraceCheckSpWp]: Trace formula consists of 996 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 21:13:32,689 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:13:32,709 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:13:33,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1796 backedges. 992 proven. 23 refuted. 0 times theorem prover too weak. 781 trivial. 0 not checked. [2019-11-23 21:13:33,558 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 21:13:33,558 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2019-11-23 21:13:33,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057722942] [2019-11-23 21:13:33,560 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 21:13:33,560 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:13:33,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 21:13:33,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-11-23 21:13:33,561 INFO L87 Difference]: Start difference. First operand 4810 states and 5033 transitions. Second operand 8 states. [2019-11-23 21:13:35,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:13:35,579 INFO L93 Difference]: Finished difference Result 9687 states and 10140 transitions. [2019-11-23 21:13:35,579 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 21:13:35,580 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 820 [2019-11-23 21:13:35,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:13:35,592 INFO L225 Difference]: With dead ends: 9687 [2019-11-23 21:13:35,592 INFO L226 Difference]: Without dead ends: 5235 [2019-11-23 21:13:35,598 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 828 GetRequests, 818 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2019-11-23 21:13:35,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5235 states. [2019-11-23 21:13:35,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5235 to 4632. [2019-11-23 21:13:35,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4632 states. [2019-11-23 21:13:35,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4632 states to 4632 states and 4853 transitions. [2019-11-23 21:13:35,683 INFO L78 Accepts]: Start accepts. Automaton has 4632 states and 4853 transitions. Word has length 820 [2019-11-23 21:13:35,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:13:35,684 INFO L462 AbstractCegarLoop]: Abstraction has 4632 states and 4853 transitions. [2019-11-23 21:13:35,684 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 21:13:35,684 INFO L276 IsEmpty]: Start isEmpty. Operand 4632 states and 4853 transitions. [2019-11-23 21:13:35,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 910 [2019-11-23 21:13:35,702 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:13:35,703 INFO L410 BasicCegarLoop]: trace histogram [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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:13:35,910 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:13:35,910 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:13:35,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:13:35,911 INFO L82 PathProgramCache]: Analyzing trace with hash 980114751, now seen corresponding path program 1 times [2019-11-23 21:13:35,912 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:13:35,912 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383888643] [2019-11-23 21:13:35,912 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:13:36,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:13:37,907 INFO L134 CoverageAnalysis]: Checked inductivity of 2377 backedges. 1690 proven. 0 refuted. 0 times theorem prover too weak. 687 trivial. 0 not checked. [2019-11-23 21:13:37,907 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383888643] [2019-11-23 21:13:37,908 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:13:37,908 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-23 21:13:37,908 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911805935] [2019-11-23 21:13:37,909 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 21:13:37,909 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:13:37,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 21:13:37,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-23 21:13:37,909 INFO L87 Difference]: Start difference. First operand 4632 states and 4853 transitions. Second operand 7 states. [2019-11-23 21:13:39,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:13:39,106 INFO L93 Difference]: Finished difference Result 9621 states and 10071 transitions. [2019-11-23 21:13:39,106 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 21:13:39,106 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 909 [2019-11-23 21:13:39,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:13:39,117 INFO L225 Difference]: With dead ends: 9621 [2019-11-23 21:13:39,117 INFO L226 Difference]: Without dead ends: 4991 [2019-11-23 21:13:39,123 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2019-11-23 21:13:39,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4991 states. [2019-11-23 21:13:39,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4991 to 4632. [2019-11-23 21:13:39,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4632 states. [2019-11-23 21:13:39,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4632 states to 4632 states and 4850 transitions. [2019-11-23 21:13:39,180 INFO L78 Accepts]: Start accepts. Automaton has 4632 states and 4850 transitions. Word has length 909 [2019-11-23 21:13:39,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:13:39,181 INFO L462 AbstractCegarLoop]: Abstraction has 4632 states and 4850 transitions. [2019-11-23 21:13:39,181 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 21:13:39,181 INFO L276 IsEmpty]: Start isEmpty. Operand 4632 states and 4850 transitions. [2019-11-23 21:13:39,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 987 [2019-11-23 21:13:39,192 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:13:39,192 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:13:39,192 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:13:39,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:13:39,193 INFO L82 PathProgramCache]: Analyzing trace with hash 2037086168, now seen corresponding path program 1 times [2019-11-23 21:13:39,193 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:13:39,193 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947773971] [2019-11-23 21:13:39,194 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:13:39,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:13:40,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2943 backedges. 738 proven. 257 refuted. 0 times theorem prover too weak. 1948 trivial. 0 not checked. [2019-11-23 21:13:40,818 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947773971] [2019-11-23 21:13:40,818 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637210660] [2019-11-23 21:13:40,818 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:13:41,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:13:41,067 INFO L255 TraceCheckSpWp]: Trace formula consists of 1208 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 21:13:41,077 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:13:41,235 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:13:41,236 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:13:42,111 INFO L134 CoverageAnalysis]: Checked inductivity of 2943 backedges. 985 proven. 10 refuted. 0 times theorem prover too weak. 1948 trivial. 0 not checked. [2019-11-23 21:13:42,112 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 21:13:42,112 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 12 [2019-11-23 21:13:42,112 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863598663] [2019-11-23 21:13:42,114 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 21:13:42,115 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:13:42,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 21:13:42,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2019-11-23 21:13:42,115 INFO L87 Difference]: Start difference. First operand 4632 states and 4850 transitions. Second operand 13 states. [2019-11-23 21:13:43,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:13:43,654 INFO L93 Difference]: Finished difference Result 9506 states and 9947 transitions. [2019-11-23 21:13:43,655 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 21:13:43,656 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 986 [2019-11-23 21:13:43,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:13:43,665 INFO L225 Difference]: With dead ends: 9506 [2019-11-23 21:13:43,665 INFO L226 Difference]: Without dead ends: 4876 [2019-11-23 21:13:43,670 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 996 GetRequests, 982 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2019-11-23 21:13:43,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4876 states. [2019-11-23 21:13:43,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4876 to 4632. [2019-11-23 21:13:43,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4632 states. [2019-11-23 21:13:43,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4632 states to 4632 states and 4820 transitions. [2019-11-23 21:13:43,722 INFO L78 Accepts]: Start accepts. Automaton has 4632 states and 4820 transitions. Word has length 986 [2019-11-23 21:13:43,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:13:43,723 INFO L462 AbstractCegarLoop]: Abstraction has 4632 states and 4820 transitions. [2019-11-23 21:13:43,723 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 21:13:43,723 INFO L276 IsEmpty]: Start isEmpty. Operand 4632 states and 4820 transitions. [2019-11-23 21:13:43,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1033 [2019-11-23 21:13:43,733 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:13:43,734 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, 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, 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, 5, 5, 5, 5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:13:43,946 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:13:43,946 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:13:43,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:13:43,947 INFO L82 PathProgramCache]: Analyzing trace with hash 538441961, now seen corresponding path program 1 times [2019-11-23 21:13:43,948 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:13:43,948 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726228761] [2019-11-23 21:13:43,948 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:13:44,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:13:45,668 INFO L134 CoverageAnalysis]: Checked inductivity of 3493 backedges. 2376 proven. 140 refuted. 0 times theorem prover too weak. 977 trivial. 0 not checked. [2019-11-23 21:13:45,669 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726228761] [2019-11-23 21:13:45,669 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137562508] [2019-11-23 21:13:45,669 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:13:45,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:13:45,956 INFO L255 TraceCheckSpWp]: Trace formula consists of 1277 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 21:13:45,966 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:13:45,989 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:13:45,990 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:13:46,020 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:13:46,021 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:13:46,731 INFO L134 CoverageAnalysis]: Checked inductivity of 3493 backedges. 2453 proven. 616 refuted. 0 times theorem prover too weak. 424 trivial. 0 not checked. [2019-11-23 21:13:46,731 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 21:13:46,732 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-11-23 21:13:46,732 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353672896] [2019-11-23 21:13:46,734 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 21:13:46,734 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:13:46,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 21:13:46,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-23 21:13:46,734 INFO L87 Difference]: Start difference. First operand 4632 states and 4820 transitions. Second operand 7 states. [2019-11-23 21:13:49,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:13:49,129 INFO L93 Difference]: Finished difference Result 11220 states and 11687 transitions. [2019-11-23 21:13:49,129 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 21:13:49,129 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 1032 [2019-11-23 21:13:49,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:13:49,136 INFO L225 Difference]: With dead ends: 11220 [2019-11-23 21:13:49,136 INFO L226 Difference]: Without dead ends: 6412 [2019-11-23 21:13:49,146 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 1044 GetRequests, 1033 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2019-11-23 21:13:49,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6412 states. [2019-11-23 21:13:49,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6412 to 6056. [2019-11-23 21:13:49,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6056 states. [2019-11-23 21:13:49,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6056 states to 6056 states and 6262 transitions. [2019-11-23 21:13:49,230 INFO L78 Accepts]: Start accepts. Automaton has 6056 states and 6262 transitions. Word has length 1032 [2019-11-23 21:13:49,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:13:49,231 INFO L462 AbstractCegarLoop]: Abstraction has 6056 states and 6262 transitions. [2019-11-23 21:13:49,231 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 21:13:49,231 INFO L276 IsEmpty]: Start isEmpty. Operand 6056 states and 6262 transitions. [2019-11-23 21:13:49,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1601 [2019-11-23 21:13:49,262 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:13:49,263 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 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, 10, 10, 10, 10, 9, 8, 7, 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, 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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:13:49,474 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:13:49,475 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:13:49,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:13:49,476 INFO L82 PathProgramCache]: Analyzing trace with hash -160688465, now seen corresponding path program 1 times [2019-11-23 21:13:49,476 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:13:49,477 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564531944] [2019-11-23 21:13:49,477 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:13:49,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:13:52,840 INFO L134 CoverageAnalysis]: Checked inductivity of 8277 backedges. 2606 proven. 0 refuted. 0 times theorem prover too weak. 5671 trivial. 0 not checked. [2019-11-23 21:13:52,841 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564531944] [2019-11-23 21:13:52,841 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:13:52,841 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-23 21:13:52,841 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570479340] [2019-11-23 21:13:52,842 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 21:13:52,842 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:13:52,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 21:13:52,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 21:13:52,843 INFO L87 Difference]: Start difference. First operand 6056 states and 6262 transitions. Second operand 7 states. [2019-11-23 21:13:53,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:13:53,734 INFO L93 Difference]: Finished difference Result 11696 states and 12089 transitions. [2019-11-23 21:13:53,735 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 21:13:53,735 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 1600 [2019-11-23 21:13:53,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:13:53,741 INFO L225 Difference]: With dead ends: 11696 [2019-11-23 21:13:53,741 INFO L226 Difference]: Without dead ends: 5700 [2019-11-23 21:13:53,747 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 21:13:53,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5700 states. [2019-11-23 21:13:53,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5700 to 5522. [2019-11-23 21:13:53,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5522 states. [2019-11-23 21:13:53,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5522 states to 5522 states and 5696 transitions. [2019-11-23 21:13:53,793 INFO L78 Accepts]: Start accepts. Automaton has 5522 states and 5696 transitions. Word has length 1600 [2019-11-23 21:13:53,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:13:53,794 INFO L462 AbstractCegarLoop]: Abstraction has 5522 states and 5696 transitions. [2019-11-23 21:13:53,794 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 21:13:53,794 INFO L276 IsEmpty]: Start isEmpty. Operand 5522 states and 5696 transitions. [2019-11-23 21:13:53,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1647 [2019-11-23 21:13:53,812 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:13:53,813 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 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, 10, 9, 9, 9, 8, 8, 8, 8, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:13:53,813 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:13:53,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:13:53,814 INFO L82 PathProgramCache]: Analyzing trace with hash -172671030, now seen corresponding path program 1 times [2019-11-23 21:13:53,814 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:13:53,814 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873531049] [2019-11-23 21:13:53,815 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:13:53,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:13:55,848 INFO L134 CoverageAnalysis]: Checked inductivity of 8542 backedges. 4898 proven. 29 refuted. 0 times theorem prover too weak. 3615 trivial. 0 not checked. [2019-11-23 21:13:55,848 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873531049] [2019-11-23 21:13:55,848 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661142207] [2019-11-23 21:13:55,849 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:13:56,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:13:56,239 INFO L255 TraceCheckSpWp]: Trace formula consists of 1982 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-23 21:13:56,256 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:13:56,415 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:13:56,416 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:13:59,744 INFO L134 CoverageAnalysis]: Checked inductivity of 8542 backedges. 5716 proven. 514 refuted. 0 times theorem prover too weak. 2312 trivial. 0 not checked. [2019-11-23 21:13:59,744 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 21:13:59,745 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2019-11-23 21:13:59,745 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770429213] [2019-11-23 21:13:59,747 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-23 21:13:59,747 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:13:59,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-23 21:13:59,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2019-11-23 21:13:59,747 INFO L87 Difference]: Start difference. First operand 5522 states and 5696 transitions. Second operand 14 states. [2019-11-23 21:14:06,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:14:06,445 INFO L93 Difference]: Finished difference Result 13890 states and 14375 transitions. [2019-11-23 21:14:06,445 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-23 21:14:06,445 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 1646 [2019-11-23 21:14:06,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:14:06,455 INFO L225 Difference]: With dead ends: 13890 [2019-11-23 21:14:06,455 INFO L226 Difference]: Without dead ends: 7836 [2019-11-23 21:14:06,461 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 1672 GetRequests, 1649 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=184, Invalid=368, Unknown=0, NotChecked=0, Total=552 [2019-11-23 21:14:06,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7836 states. [2019-11-23 21:14:06,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7836 to 4098. [2019-11-23 21:14:06,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4098 states. [2019-11-23 21:14:06,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4098 states to 4098 states and 4187 transitions. [2019-11-23 21:14:06,511 INFO L78 Accepts]: Start accepts. Automaton has 4098 states and 4187 transitions. Word has length 1646 [2019-11-23 21:14:06,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:14:06,513 INFO L462 AbstractCegarLoop]: Abstraction has 4098 states and 4187 transitions. [2019-11-23 21:14:06,513 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-23 21:14:06,513 INFO L276 IsEmpty]: Start isEmpty. Operand 4098 states and 4187 transitions. [2019-11-23 21:14:06,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1668 [2019-11-23 21:14:06,529 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:14:06,530 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 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, 10, 10, 10, 10, 9, 8, 8, 7, 7, 7, 7, 7, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:14:06,731 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:14:06,731 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:14:06,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:14:06,733 INFO L82 PathProgramCache]: Analyzing trace with hash -191271911, now seen corresponding path program 1 times [2019-11-23 21:14:06,733 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:14:06,733 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042791847] [2019-11-23 21:14:06,734 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:14:06,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:14:09,543 INFO L134 CoverageAnalysis]: Checked inductivity of 8520 backedges. 2627 proven. 0 refuted. 0 times theorem prover too weak. 5893 trivial. 0 not checked. [2019-11-23 21:14:09,543 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042791847] [2019-11-23 21:14:09,543 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:14:09,544 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-23 21:14:09,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800107596] [2019-11-23 21:14:09,545 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 21:14:09,545 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:14:09,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 21:14:09,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 21:14:09,546 INFO L87 Difference]: Start difference. First operand 4098 states and 4187 transitions. Second operand 7 states. [2019-11-23 21:14:10,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:14:10,689 INFO L93 Difference]: Finished difference Result 8254 states and 8436 transitions. [2019-11-23 21:14:10,689 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 21:14:10,689 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 1667 [2019-11-23 21:14:10,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:14:10,693 INFO L225 Difference]: With dead ends: 8254 [2019-11-23 21:14:10,694 INFO L226 Difference]: Without dead ends: 4276 [2019-11-23 21:14:10,697 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 21:14:10,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4276 states. [2019-11-23 21:14:10,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4276 to 4098. [2019-11-23 21:14:10,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4098 states. [2019-11-23 21:14:10,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4098 states to 4098 states and 4186 transitions. [2019-11-23 21:14:10,727 INFO L78 Accepts]: Start accepts. Automaton has 4098 states and 4186 transitions. Word has length 1667 [2019-11-23 21:14:10,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:14:10,727 INFO L462 AbstractCegarLoop]: Abstraction has 4098 states and 4186 transitions. [2019-11-23 21:14:10,727 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 21:14:10,728 INFO L276 IsEmpty]: Start isEmpty. Operand 4098 states and 4186 transitions. [2019-11-23 21:14:10,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1814 [2019-11-23 21:14:10,746 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:14:10,747 INFO L410 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 13, 13, 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, 10, 9, 9, 9, 8, 8, 8, 8, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 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, 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 21:14:10,747 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:14:10,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:14:10,748 INFO L82 PathProgramCache]: Analyzing trace with hash -354861792, now seen corresponding path program 1 times [2019-11-23 21:14:10,748 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:14:10,748 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023290848] [2019-11-23 21:14:10,748 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:14:10,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:14:12,594 INFO L134 CoverageAnalysis]: Checked inductivity of 10875 backedges. 2724 proven. 0 refuted. 0 times theorem prover too weak. 8151 trivial. 0 not checked. [2019-11-23 21:14:12,594 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023290848] [2019-11-23 21:14:12,594 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:14:12,595 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-23 21:14:12,595 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15323901] [2019-11-23 21:14:12,596 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 21:14:12,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:14:12,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 21:14:12,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 21:14:12,597 INFO L87 Difference]: Start difference. First operand 4098 states and 4186 transitions. Second operand 5 states. [2019-11-23 21:14:13,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:14:13,805 INFO L93 Difference]: Finished difference Result 10508 states and 10764 transitions. [2019-11-23 21:14:13,806 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 21:14:13,806 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 1813 [2019-11-23 21:14:13,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:14:13,812 INFO L225 Difference]: With dead ends: 10508 [2019-11-23 21:14:13,813 INFO L226 Difference]: Without dead ends: 6590 [2019-11-23 21:14:13,816 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 21:14:13,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6590 states. [2019-11-23 21:14:13,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6590 to 5344. [2019-11-23 21:14:13,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5344 states. [2019-11-23 21:14:13,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5344 states to 5344 states and 5485 transitions. [2019-11-23 21:14:13,875 INFO L78 Accepts]: Start accepts. Automaton has 5344 states and 5485 transitions. Word has length 1813 [2019-11-23 21:14:13,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:14:13,876 INFO L462 AbstractCegarLoop]: Abstraction has 5344 states and 5485 transitions. [2019-11-23 21:14:13,876 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 21:14:13,876 INFO L276 IsEmpty]: Start isEmpty. Operand 5344 states and 5485 transitions. [2019-11-23 21:14:13,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1949 [2019-11-23 21:14:13,914 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:14:13,915 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 11, 10, 10, 10, 9, 9, 9, 9, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 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, 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] [2019-11-23 21:14:13,915 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:14:13,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:14:13,916 INFO L82 PathProgramCache]: Analyzing trace with hash -962862479, now seen corresponding path program 1 times [2019-11-23 21:14:13,916 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:14:13,916 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861944334] [2019-11-23 21:14:13,917 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:14:14,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:14:17,101 INFO L134 CoverageAnalysis]: Checked inductivity of 12570 backedges. 4213 proven. 0 refuted. 0 times theorem prover too weak. 8357 trivial. 0 not checked. [2019-11-23 21:14:17,101 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861944334] [2019-11-23 21:14:17,102 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:14:17,102 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-23 21:14:17,102 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330975589] [2019-11-23 21:14:17,103 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 21:14:17,104 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:14:17,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 21:14:17,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 21:14:17,104 INFO L87 Difference]: Start difference. First operand 5344 states and 5485 transitions. Second operand 7 states. [2019-11-23 21:14:17,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:14:17,950 INFO L93 Difference]: Finished difference Result 10122 states and 10373 transitions. [2019-11-23 21:14:17,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 21:14:17,952 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 1948 [2019-11-23 21:14:17,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:14:17,957 INFO L225 Difference]: With dead ends: 10122 [2019-11-23 21:14:17,957 INFO L226 Difference]: Without dead ends: 4665 [2019-11-23 21:14:17,960 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 21:14:17,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4665 states. [2019-11-23 21:14:17,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4665 to 4487. [2019-11-23 21:14:17,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4487 states. [2019-11-23 21:14:17,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4487 states to 4487 states and 4585 transitions. [2019-11-23 21:14:18,000 INFO L78 Accepts]: Start accepts. Automaton has 4487 states and 4585 transitions. Word has length 1948 [2019-11-23 21:14:18,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:14:18,000 INFO L462 AbstractCegarLoop]: Abstraction has 4487 states and 4585 transitions. [2019-11-23 21:14:18,000 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 21:14:18,001 INFO L276 IsEmpty]: Start isEmpty. Operand 4487 states and 4585 transitions. [2019-11-23 21:14:18,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1957 [2019-11-23 21:14:18,021 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:14:18,022 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 11, 10, 10, 10, 9, 9, 9, 9, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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] [2019-11-23 21:14:18,022 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:14:18,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:14:18,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1012455035, now seen corresponding path program 1 times [2019-11-23 21:14:18,023 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:14:18,023 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302924582] [2019-11-23 21:14:18,023 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:14:18,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:14:21,019 INFO L134 CoverageAnalysis]: Checked inductivity of 12600 backedges. 4245 proven. 0 refuted. 0 times theorem prover too weak. 8355 trivial. 0 not checked. [2019-11-23 21:14:21,020 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302924582] [2019-11-23 21:14:21,020 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:14:21,020 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-23 21:14:21,021 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223900967] [2019-11-23 21:14:21,022 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 21:14:21,022 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:14:21,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 21:14:21,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 21:14:21,022 INFO L87 Difference]: Start difference. First operand 4487 states and 4585 transitions. Second operand 7 states. [2019-11-23 21:14:21,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:14:21,682 INFO L93 Difference]: Finished difference Result 9203 states and 9404 transitions. [2019-11-23 21:14:21,683 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 21:14:21,683 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 1956 [2019-11-23 21:14:21,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:14:21,687 INFO L225 Difference]: With dead ends: 9203 [2019-11-23 21:14:21,687 INFO L226 Difference]: Without dead ends: 4665 [2019-11-23 21:14:21,689 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 21:14:21,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4665 states. [2019-11-23 21:14:21,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4665 to 4487. [2019-11-23 21:14:21,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4487 states. [2019-11-23 21:14:21,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4487 states to 4487 states and 4580 transitions. [2019-11-23 21:14:21,724 INFO L78 Accepts]: Start accepts. Automaton has 4487 states and 4580 transitions. Word has length 1956 [2019-11-23 21:14:21,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:14:21,724 INFO L462 AbstractCegarLoop]: Abstraction has 4487 states and 4580 transitions. [2019-11-23 21:14:21,724 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 21:14:21,724 INFO L276 IsEmpty]: Start isEmpty. Operand 4487 states and 4580 transitions. [2019-11-23 21:14:21,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1984 [2019-11-23 21:14:21,745 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:14:21,746 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 11, 10, 10, 10, 9, 9, 9, 9, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 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, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 21:14:21,746 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:14:21,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:14:21,747 INFO L82 PathProgramCache]: Analyzing trace with hash -375981036, now seen corresponding path program 1 times [2019-11-23 21:14:21,747 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:14:21,747 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995396325] [2019-11-23 21:14:21,747 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:14:21,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:14:24,724 INFO L134 CoverageAnalysis]: Checked inductivity of 12681 backedges. 4237 proven. 0 refuted. 0 times theorem prover too weak. 8444 trivial. 0 not checked. [2019-11-23 21:14:24,724 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995396325] [2019-11-23 21:14:24,725 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:14:24,725 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-23 21:14:24,725 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407102637] [2019-11-23 21:14:24,726 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 21:14:24,726 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:14:24,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 21:14:24,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 21:14:24,727 INFO L87 Difference]: Start difference. First operand 4487 states and 4580 transitions. Second operand 7 states. [2019-11-23 21:14:25,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:14:25,441 INFO L93 Difference]: Finished difference Result 9199 states and 9390 transitions. [2019-11-23 21:14:25,444 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 21:14:25,444 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 1983 [2019-11-23 21:14:25,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:14:25,448 INFO L225 Difference]: With dead ends: 9199 [2019-11-23 21:14:25,448 INFO L226 Difference]: Without dead ends: 4665 [2019-11-23 21:14:25,451 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 21:14:25,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4665 states.