java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:44:50,646 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:44:50,649 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:44:50,669 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:44:50,669 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:44:50,671 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:44:50,673 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:44:50,680 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:44:50,682 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:44:50,684 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:44:50,686 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:44:50,687 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:44:50,688 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:44:50,691 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:44:50,693 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:44:50,695 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:44:50,696 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:44:50,698 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:44:50,699 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:44:50,704 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:44:50,708 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:44:50,711 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:44:50,714 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:44:50,715 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:44:50,718 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 23:44:50,723 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:44:50,724 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:44:50,724 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:44:50,725 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:44:50,727 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:44:50,727 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:44:50,727 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:44:50,728 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:44:50,728 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:44:50,729 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:44:50,730 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:44:50,731 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 [2019-10-14 23:44:50,750 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:44:50,751 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:44:50,753 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:44:50,753 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:44:50,753 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:44:50,753 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:44:50,753 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:44:50,754 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:44:50,754 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:44:50,754 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:44:50,755 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:44:50,755 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:44:50,755 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:44:50,756 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:44:50,756 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:44:50,756 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:44:50,756 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:44:50,757 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:44:50,757 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:44:50,757 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:44:50,757 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:44:50,757 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:44:50,758 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:44:50,758 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:44:50,758 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:44:50,758 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:44:50,758 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:44:50,759 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:44:50,759 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 23:44:51,058 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:44:51,071 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:44:51,074 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:44:51,076 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:44:51,076 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:44:51,077 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2019-10-14 23:44:51,149 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/67a6e1d70/658ab92288df4c8f98847128d55ab05e/FLAGdc5997167 [2019-10-14 23:44:51,653 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:44:51,656 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2019-10-14 23:44:51,682 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/67a6e1d70/658ab92288df4c8f98847128d55ab05e/FLAGdc5997167 [2019-10-14 23:44:52,008 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/67a6e1d70/658ab92288df4c8f98847128d55ab05e [2019-10-14 23:44:52,019 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:44:52,021 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:44:52,025 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:44:52,025 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:44:52,029 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:44:52,030 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:44:52" (1/1) ... [2019-10-14 23:44:52,033 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d6ee061 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:44:52, skipping insertion in model container [2019-10-14 23:44:52,033 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:44:52" (1/1) ... [2019-10-14 23:44:52,041 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:44:52,106 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:44:52,397 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:44:52,422 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:44:52,596 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:44:52,631 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:44:52,632 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:44:52 WrapperNode [2019-10-14 23:44:52,632 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:44:52,633 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:44:52,633 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:44:52,633 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:44:52,643 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:44:52" (1/1) ... [2019-10-14 23:44:52,643 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:44:52" (1/1) ... [2019-10-14 23:44:52,653 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:44:52" (1/1) ... [2019-10-14 23:44:52,653 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:44:52" (1/1) ... [2019-10-14 23:44:52,676 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:44:52" (1/1) ... [2019-10-14 23:44:52,691 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:44:52" (1/1) ... [2019-10-14 23:44:52,695 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:44:52" (1/1) ... [2019-10-14 23:44:52,700 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:44:52,700 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:44:52,700 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:44:52,701 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:44:52,702 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:44:52" (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 [2019-10-14 23:44:52,760 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:44:52,760 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:44:52,761 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:44:52,761 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:44:52,762 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2019-10-14 23:44:52,763 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2019-10-14 23:44:52,763 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2019-10-14 23:44:52,763 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2019-10-14 23:44:52,763 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-14 23:44:52,763 INFO L130 BoogieDeclarations]: Found specification of procedure read [2019-10-14 23:44:52,763 INFO L130 BoogieDeclarations]: Found specification of procedure write [2019-10-14 23:44:52,764 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2019-10-14 23:44:52,765 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2019-10-14 23:44:52,765 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2019-10-14 23:44:52,766 INFO L130 BoogieDeclarations]: Found specification of procedure init [2019-10-14 23:44:52,766 INFO L130 BoogieDeclarations]: Found specification of procedure check [2019-10-14 23:44:52,769 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:44:52,769 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:44:52,769 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:44:53,588 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:44:53,589 INFO L284 CfgBuilder]: Removed 0 assume(true) statements. [2019-10-14 23:44:53,591 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:44:53 BoogieIcfgContainer [2019-10-14 23:44:53,591 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:44:53,592 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:44:53,592 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:44:53,596 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:44:53,596 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:44:52" (1/3) ... [2019-10-14 23:44:53,597 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c2d3daa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:44:53, skipping insertion in model container [2019-10-14 23:44:53,598 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:44:52" (2/3) ... [2019-10-14 23:44:53,598 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c2d3daa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:44:53, skipping insertion in model container [2019-10-14 23:44:53,599 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:44:53" (3/3) ... [2019-10-14 23:44:53,604 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2019-10-14 23:44:53,615 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:44:53,623 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:44:53,635 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:44:53,663 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:44:53,663 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:44:53,664 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:44:53,664 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:44:53,664 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:44:53,664 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:44:53,664 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:44:53,665 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:44:53,687 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states. [2019-10-14 23:44:53,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-10-14 23:44:53,697 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:44:53,699 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:44:53,701 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:44:53,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:44:53,707 INFO L82 PathProgramCache]: Analyzing trace with hash 1085569870, now seen corresponding path program 1 times [2019-10-14 23:44:53,715 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:44:53,715 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075307512] [2019-10-14 23:44:53,715 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:44:53,716 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:44:53,716 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:44:53,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:44:54,456 WARN L191 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2019-10-14 23:44:54,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:44:54,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:44:54,498 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075307512] [2019-10-14 23:44:54,499 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:44:54,499 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 23:44:54,499 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573327931] [2019-10-14 23:44:54,504 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:44:54,504 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:44:54,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:44:54,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:44:54,521 INFO L87 Difference]: Start difference. First operand 154 states. Second operand 4 states. [2019-10-14 23:44:54,819 WARN L191 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2019-10-14 23:44:55,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:44:55,637 INFO L93 Difference]: Finished difference Result 342 states and 566 transitions. [2019-10-14 23:44:55,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 23:44:55,639 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 60 [2019-10-14 23:44:55,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:44:55,656 INFO L225 Difference]: With dead ends: 342 [2019-10-14 23:44:55,657 INFO L226 Difference]: Without dead ends: 235 [2019-10-14 23:44:55,663 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:44:55,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2019-10-14 23:44:55,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 232. [2019-10-14 23:44:55,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2019-10-14 23:44:55,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 363 transitions. [2019-10-14 23:44:55,738 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 363 transitions. Word has length 60 [2019-10-14 23:44:55,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:44:55,739 INFO L462 AbstractCegarLoop]: Abstraction has 232 states and 363 transitions. [2019-10-14 23:44:55,739 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:44:55,739 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 363 transitions. [2019-10-14 23:44:55,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2019-10-14 23:44:55,743 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:44:55,743 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:44:55,743 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:44:55,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:44:55,744 INFO L82 PathProgramCache]: Analyzing trace with hash -1093309265, now seen corresponding path program 1 times [2019-10-14 23:44:55,744 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:44:55,744 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387033545] [2019-10-14 23:44:55,745 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:44:55,745 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:44:55,745 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:44:55,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:44:56,064 WARN L191 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2019-10-14 23:44:56,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:44:56,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:44:56,087 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387033545] [2019-10-14 23:44:56,087 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:44:56,088 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 23:44:56,088 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061087713] [2019-10-14 23:44:56,090 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:44:56,090 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:44:56,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:44:56,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:44:56,091 INFO L87 Difference]: Start difference. First operand 232 states and 363 transitions. Second operand 4 states. [2019-10-14 23:44:56,299 WARN L191 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2019-10-14 23:44:56,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:44:56,968 INFO L93 Difference]: Finished difference Result 570 states and 915 transitions. [2019-10-14 23:44:56,968 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 23:44:56,969 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 62 [2019-10-14 23:44:56,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:44:56,974 INFO L225 Difference]: With dead ends: 570 [2019-10-14 23:44:56,974 INFO L226 Difference]: Without dead ends: 393 [2019-10-14 23:44:56,976 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:44:56,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2019-10-14 23:44:57,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 389. [2019-10-14 23:44:57,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 389 states. [2019-10-14 23:44:57,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 618 transitions. [2019-10-14 23:44:57,028 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 618 transitions. Word has length 62 [2019-10-14 23:44:57,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:44:57,029 INFO L462 AbstractCegarLoop]: Abstraction has 389 states and 618 transitions. [2019-10-14 23:44:57,029 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:44:57,029 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 618 transitions. [2019-10-14 23:44:57,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-10-14 23:44:57,033 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:44:57,033 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:44:57,033 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:44:57,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:44:57,034 INFO L82 PathProgramCache]: Analyzing trace with hash 647852560, now seen corresponding path program 1 times [2019-10-14 23:44:57,034 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:44:57,034 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452451726] [2019-10-14 23:44:57,034 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:44:57,034 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:44:57,035 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:44:57,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:44:57,321 WARN L191 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2019-10-14 23:44:57,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:44:57,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:44:57,342 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452451726] [2019-10-14 23:44:57,343 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:44:57,343 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 23:44:57,343 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406172642] [2019-10-14 23:44:57,344 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:44:57,344 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:44:57,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:44:57,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:44:57,345 INFO L87 Difference]: Start difference. First operand 389 states and 618 transitions. Second operand 4 states. [2019-10-14 23:44:57,623 WARN L191 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2019-10-14 23:44:58,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:44:58,267 INFO L93 Difference]: Finished difference Result 1025 states and 1652 transitions. [2019-10-14 23:44:58,268 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 23:44:58,268 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 64 [2019-10-14 23:44:58,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:44:58,273 INFO L225 Difference]: With dead ends: 1025 [2019-10-14 23:44:58,273 INFO L226 Difference]: Without dead ends: 691 [2019-10-14 23:44:58,276 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:44:58,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2019-10-14 23:44:58,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 685. [2019-10-14 23:44:58,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 685 states. [2019-10-14 23:44:58,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 685 states to 685 states and 1094 transitions. [2019-10-14 23:44:58,332 INFO L78 Accepts]: Start accepts. Automaton has 685 states and 1094 transitions. Word has length 64 [2019-10-14 23:44:58,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:44:58,333 INFO L462 AbstractCegarLoop]: Abstraction has 685 states and 1094 transitions. [2019-10-14 23:44:58,333 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:44:58,333 INFO L276 IsEmpty]: Start isEmpty. Operand 685 states and 1094 transitions. [2019-10-14 23:44:58,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-10-14 23:44:58,343 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:44:58,343 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:44:58,344 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:44:58,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:44:58,348 INFO L82 PathProgramCache]: Analyzing trace with hash -971934415, now seen corresponding path program 1 times [2019-10-14 23:44:58,348 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:44:58,348 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989805972] [2019-10-14 23:44:58,348 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:44:58,349 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:44:58,349 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:44:58,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:44:58,756 WARN L191 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2019-10-14 23:44:58,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:44:58,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:44:58,797 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989805972] [2019-10-14 23:44:58,798 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:44:58,798 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 23:44:58,798 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518860137] [2019-10-14 23:44:58,799 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:44:58,799 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:44:58,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:44:58,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:44:58,799 INFO L87 Difference]: Start difference. First operand 685 states and 1094 transitions. Second operand 6 states. [2019-10-14 23:44:59,036 WARN L191 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2019-10-14 23:44:59,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:44:59,820 INFO L93 Difference]: Finished difference Result 2313 states and 3756 transitions. [2019-10-14 23:44:59,820 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:44:59,821 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2019-10-14 23:44:59,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:44:59,831 INFO L225 Difference]: With dead ends: 2313 [2019-10-14 23:44:59,831 INFO L226 Difference]: Without dead ends: 1683 [2019-10-14 23:44:59,834 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:44:59,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1683 states. [2019-10-14 23:44:59,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1683 to 1500. [2019-10-14 23:44:59,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1500 states. [2019-10-14 23:44:59,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1500 states to 1500 states and 2423 transitions. [2019-10-14 23:44:59,925 INFO L78 Accepts]: Start accepts. Automaton has 1500 states and 2423 transitions. Word has length 66 [2019-10-14 23:44:59,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:44:59,927 INFO L462 AbstractCegarLoop]: Abstraction has 1500 states and 2423 transitions. [2019-10-14 23:44:59,928 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:44:59,928 INFO L276 IsEmpty]: Start isEmpty. Operand 1500 states and 2423 transitions. [2019-10-14 23:44:59,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-10-14 23:44:59,930 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:44:59,931 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:44:59,931 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:44:59,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:44:59,932 INFO L82 PathProgramCache]: Analyzing trace with hash -126806256, now seen corresponding path program 1 times [2019-10-14 23:44:59,932 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:44:59,932 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127130518] [2019-10-14 23:44:59,933 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:44:59,933 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:44:59,933 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:44:59,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:45:00,293 WARN L191 SmtUtils]: Spent 214.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2019-10-14 23:45:00,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:45:00,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:45:00,312 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127130518] [2019-10-14 23:45:00,312 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:45:00,312 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-14 23:45:00,312 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326555863] [2019-10-14 23:45:00,313 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 23:45:00,313 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:45:00,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 23:45:00,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:45:00,314 INFO L87 Difference]: Start difference. First operand 1500 states and 2423 transitions. Second operand 7 states. [2019-10-14 23:45:00,567 WARN L191 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2019-10-14 23:45:01,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:45:01,934 INFO L93 Difference]: Finished difference Result 5957 states and 9657 transitions. [2019-10-14 23:45:01,935 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 23:45:01,935 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 67 [2019-10-14 23:45:01,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:45:01,960 INFO L225 Difference]: With dead ends: 5957 [2019-10-14 23:45:01,961 INFO L226 Difference]: Without dead ends: 4512 [2019-10-14 23:45:01,965 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2019-10-14 23:45:01,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4512 states. [2019-10-14 23:45:02,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4512 to 4409. [2019-10-14 23:45:02,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4409 states. [2019-10-14 23:45:02,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4409 states to 4409 states and 7126 transitions. [2019-10-14 23:45:02,193 INFO L78 Accepts]: Start accepts. Automaton has 4409 states and 7126 transitions. Word has length 67 [2019-10-14 23:45:02,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:45:02,193 INFO L462 AbstractCegarLoop]: Abstraction has 4409 states and 7126 transitions. [2019-10-14 23:45:02,193 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 23:45:02,194 INFO L276 IsEmpty]: Start isEmpty. Operand 4409 states and 7126 transitions. [2019-10-14 23:45:02,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-10-14 23:45:02,195 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:45:02,196 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:45:02,196 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:45:02,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:45:02,196 INFO L82 PathProgramCache]: Analyzing trace with hash 306920920, now seen corresponding path program 1 times [2019-10-14 23:45:02,197 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:45:02,197 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926383639] [2019-10-14 23:45:02,197 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:45:02,197 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:45:02,198 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:45:02,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:45:02,513 WARN L191 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2019-10-14 23:45:02,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:45:02,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:45:02,531 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926383639] [2019-10-14 23:45:02,531 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:45:02,531 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 23:45:02,532 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275901204] [2019-10-14 23:45:02,532 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:45:02,532 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:45:02,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:45:02,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:45:02,533 INFO L87 Difference]: Start difference. First operand 4409 states and 7126 transitions. Second operand 5 states. [2019-10-14 23:45:02,756 WARN L191 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2019-10-14 23:45:03,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:45:03,684 INFO L93 Difference]: Finished difference Result 10298 states and 16697 transitions. [2019-10-14 23:45:03,684 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 23:45:03,684 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 68 [2019-10-14 23:45:03,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:45:03,720 INFO L225 Difference]: With dead ends: 10298 [2019-10-14 23:45:03,720 INFO L226 Difference]: Without dead ends: 6343 [2019-10-14 23:45:03,730 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:45:03,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6343 states. [2019-10-14 23:45:04,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6343 to 6316. [2019-10-14 23:45:04,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6316 states. [2019-10-14 23:45:04,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6316 states to 6316 states and 10205 transitions. [2019-10-14 23:45:04,036 INFO L78 Accepts]: Start accepts. Automaton has 6316 states and 10205 transitions. Word has length 68 [2019-10-14 23:45:04,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:45:04,037 INFO L462 AbstractCegarLoop]: Abstraction has 6316 states and 10205 transitions. [2019-10-14 23:45:04,037 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 23:45:04,037 INFO L276 IsEmpty]: Start isEmpty. Operand 6316 states and 10205 transitions. [2019-10-14 23:45:04,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-10-14 23:45:04,039 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:45:04,040 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:45:04,040 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:45:04,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:45:04,040 INFO L82 PathProgramCache]: Analyzing trace with hash 872119511, now seen corresponding path program 1 times [2019-10-14 23:45:04,042 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:45:04,042 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292226247] [2019-10-14 23:45:04,042 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:45:04,042 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:45:04,043 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:45:04,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:45:04,386 WARN L191 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2019-10-14 23:45:04,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:45:04,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:45:04,404 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292226247] [2019-10-14 23:45:04,405 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:45:04,405 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 23:45:04,405 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040633079] [2019-10-14 23:45:04,406 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:45:04,406 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:45:04,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:45:04,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:45:04,407 INFO L87 Difference]: Start difference. First operand 6316 states and 10205 transitions. Second operand 5 states. [2019-10-14 23:45:04,640 WARN L191 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2019-10-14 23:45:05,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:45:05,637 INFO L93 Difference]: Finished difference Result 18451 states and 29920 transitions. [2019-10-14 23:45:05,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 23:45:05,638 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 69 [2019-10-14 23:45:05,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:45:05,701 INFO L225 Difference]: With dead ends: 18451 [2019-10-14 23:45:05,701 INFO L226 Difference]: Without dead ends: 12686 [2019-10-14 23:45:05,716 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:45:05,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12686 states. [2019-10-14 23:45:06,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12686 to 8636. [2019-10-14 23:45:06,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8636 states. [2019-10-14 23:45:06,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8636 states to 8636 states and 13951 transitions. [2019-10-14 23:45:06,158 INFO L78 Accepts]: Start accepts. Automaton has 8636 states and 13951 transitions. Word has length 69 [2019-10-14 23:45:06,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:45:06,159 INFO L462 AbstractCegarLoop]: Abstraction has 8636 states and 13951 transitions. [2019-10-14 23:45:06,159 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 23:45:06,159 INFO L276 IsEmpty]: Start isEmpty. Operand 8636 states and 13951 transitions. [2019-10-14 23:45:06,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-10-14 23:45:06,161 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:45:06,161 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:45:06,162 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:45:06,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:45:06,162 INFO L82 PathProgramCache]: Analyzing trace with hash 1806428220, now seen corresponding path program 1 times [2019-10-14 23:45:06,163 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:45:06,163 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151204794] [2019-10-14 23:45:06,163 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:45:06,163 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:45:06,163 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:45:06,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:45:06,401 WARN L191 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2019-10-14 23:45:06,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:45:06,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:45:06,419 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151204794] [2019-10-14 23:45:06,419 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:45:06,419 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 23:45:06,419 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287166796] [2019-10-14 23:45:06,420 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:45:06,420 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:45:06,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:45:06,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:45:06,421 INFO L87 Difference]: Start difference. First operand 8636 states and 13951 transitions. Second operand 4 states. [2019-10-14 23:45:06,654 WARN L191 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2019-10-14 23:45:07,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:45:07,712 INFO L93 Difference]: Finished difference Result 19227 states and 31095 transitions. [2019-10-14 23:45:07,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 23:45:07,713 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 70 [2019-10-14 23:45:07,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:45:07,745 INFO L225 Difference]: With dead ends: 19227 [2019-10-14 23:45:07,745 INFO L226 Difference]: Without dead ends: 12825 [2019-10-14 23:45:07,762 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:45:07,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12825 states. [2019-10-14 23:45:08,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12825 to 12823. [2019-10-14 23:45:08,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12823 states. [2019-10-14 23:45:08,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12823 states to 12823 states and 20604 transitions. [2019-10-14 23:45:08,312 INFO L78 Accepts]: Start accepts. Automaton has 12823 states and 20604 transitions. Word has length 70 [2019-10-14 23:45:08,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:45:08,312 INFO L462 AbstractCegarLoop]: Abstraction has 12823 states and 20604 transitions. [2019-10-14 23:45:08,312 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:45:08,312 INFO L276 IsEmpty]: Start isEmpty. Operand 12823 states and 20604 transitions. [2019-10-14 23:45:08,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-10-14 23:45:08,314 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:45:08,314 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:45:08,314 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:45:08,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:45:08,314 INFO L82 PathProgramCache]: Analyzing trace with hash -552777714, now seen corresponding path program 1 times [2019-10-14 23:45:08,314 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:45:08,315 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899371979] [2019-10-14 23:45:08,315 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:45:08,315 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:45:08,315 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:45:08,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:45:08,548 WARN L191 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2019-10-14 23:45:08,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:45:08,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:45:08,564 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899371979] [2019-10-14 23:45:08,566 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:45:08,566 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 23:45:08,567 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728246998] [2019-10-14 23:45:08,568 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:45:08,573 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:45:08,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:45:08,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:45:08,574 INFO L87 Difference]: Start difference. First operand 12823 states and 20604 transitions. Second operand 4 states. [2019-10-14 23:45:08,780 WARN L191 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2019-10-14 23:45:09,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:45:09,938 INFO L93 Difference]: Finished difference Result 27737 states and 44670 transitions. [2019-10-14 23:45:09,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 23:45:09,939 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 70 [2019-10-14 23:45:09,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:45:09,979 INFO L225 Difference]: With dead ends: 27737 [2019-10-14 23:45:09,979 INFO L226 Difference]: Without dead ends: 18500 [2019-10-14 23:45:09,999 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:45:10,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18500 states. [2019-10-14 23:45:10,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18500 to 18498. [2019-10-14 23:45:10,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18498 states. [2019-10-14 23:45:10,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18498 states to 18498 states and 29596 transitions. [2019-10-14 23:45:10,663 INFO L78 Accepts]: Start accepts. Automaton has 18498 states and 29596 transitions. Word has length 70 [2019-10-14 23:45:10,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:45:10,664 INFO L462 AbstractCegarLoop]: Abstraction has 18498 states and 29596 transitions. [2019-10-14 23:45:10,664 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:45:10,664 INFO L276 IsEmpty]: Start isEmpty. Operand 18498 states and 29596 transitions. [2019-10-14 23:45:10,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-10-14 23:45:10,664 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:45:10,665 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:45:10,665 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:45:10,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:45:10,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1170468960, now seen corresponding path program 1 times [2019-10-14 23:45:10,665 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:45:10,665 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248243864] [2019-10-14 23:45:10,666 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:45:10,666 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:45:10,666 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:45:10,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:45:10,909 WARN L191 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2019-10-14 23:45:10,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:45:10,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:45:10,937 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248243864] [2019-10-14 23:45:10,938 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:45:10,938 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 23:45:10,938 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187472209] [2019-10-14 23:45:10,939 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:45:10,939 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:45:10,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:45:10,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:45:10,940 INFO L87 Difference]: Start difference. First operand 18498 states and 29596 transitions. Second operand 4 states. [2019-10-14 23:45:11,232 WARN L191 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 167 [2019-10-14 23:45:13,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:45:13,107 INFO L93 Difference]: Finished difference Result 42427 states and 68162 transitions. [2019-10-14 23:45:13,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 23:45:13,108 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 70 [2019-10-14 23:45:13,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:45:13,148 INFO L225 Difference]: With dead ends: 42427 [2019-10-14 23:45:13,148 INFO L226 Difference]: Without dead ends: 27744 [2019-10-14 23:45:13,174 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:45:13,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27744 states. [2019-10-14 23:45:14,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27744 to 27742. [2019-10-14 23:45:14,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27742 states. [2019-10-14 23:45:14,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27742 states to 27742 states and 44151 transitions. [2019-10-14 23:45:14,038 INFO L78 Accepts]: Start accepts. Automaton has 27742 states and 44151 transitions. Word has length 70 [2019-10-14 23:45:14,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:45:14,038 INFO L462 AbstractCegarLoop]: Abstraction has 27742 states and 44151 transitions. [2019-10-14 23:45:14,038 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:45:14,038 INFO L276 IsEmpty]: Start isEmpty. Operand 27742 states and 44151 transitions. [2019-10-14 23:45:14,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-10-14 23:45:14,039 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:45:14,039 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:45:14,039 INFO L410 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:45:14,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:45:14,039 INFO L82 PathProgramCache]: Analyzing trace with hash -901408249, now seen corresponding path program 1 times [2019-10-14 23:45:14,040 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:45:14,040 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43769031] [2019-10-14 23:45:14,040 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:45:14,040 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:45:14,040 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:45:14,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:45:14,386 WARN L191 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2019-10-14 23:45:14,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:45:14,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:45:14,412 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43769031] [2019-10-14 23:45:14,412 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:45:14,412 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 23:45:14,412 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259104863] [2019-10-14 23:45:14,413 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:45:14,413 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:45:14,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:45:14,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:45:14,413 INFO L87 Difference]: Start difference. First operand 27742 states and 44151 transitions. Second operand 6 states. [2019-10-14 23:45:14,756 WARN L191 SmtUtils]: Spent 307.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2019-10-14 23:45:16,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:45:16,694 INFO L93 Difference]: Finished difference Result 57487 states and 91562 transitions. [2019-10-14 23:45:16,694 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:45:16,694 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 71 [2019-10-14 23:45:16,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:45:16,736 INFO L225 Difference]: With dead ends: 57487 [2019-10-14 23:45:16,736 INFO L226 Difference]: Without dead ends: 29834 [2019-10-14 23:45:16,778 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:45:16,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29834 states. [2019-10-14 23:45:17,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29834 to 27742. [2019-10-14 23:45:17,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27742 states. [2019-10-14 23:45:17,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27742 states to 27742 states and 44016 transitions. [2019-10-14 23:45:17,816 INFO L78 Accepts]: Start accepts. Automaton has 27742 states and 44016 transitions. Word has length 71 [2019-10-14 23:45:17,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:45:17,816 INFO L462 AbstractCegarLoop]: Abstraction has 27742 states and 44016 transitions. [2019-10-14 23:45:17,816 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:45:17,816 INFO L276 IsEmpty]: Start isEmpty. Operand 27742 states and 44016 transitions. [2019-10-14 23:45:17,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2019-10-14 23:45:17,817 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:45:17,817 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:45:17,817 INFO L410 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:45:17,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:45:17,818 INFO L82 PathProgramCache]: Analyzing trace with hash 527849417, now seen corresponding path program 1 times [2019-10-14 23:45:17,818 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:45:17,818 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624358974] [2019-10-14 23:45:17,818 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:45:17,819 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:45:17,819 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:45:17,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:45:18,180 WARN L191 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2019-10-14 23:45:18,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:45:18,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:45:18,205 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624358974] [2019-10-14 23:45:18,205 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:45:18,208 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 23:45:18,208 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959131552] [2019-10-14 23:45:18,208 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:45:18,209 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:45:18,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:45:18,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:45:18,210 INFO L87 Difference]: Start difference. First operand 27742 states and 44016 transitions. Second operand 6 states. [2019-10-14 23:45:18,432 WARN L191 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2019-10-14 23:45:20,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:45:20,686 INFO L93 Difference]: Finished difference Result 89911 states and 143015 transitions. [2019-10-14 23:45:20,686 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:45:20,687 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 74 [2019-10-14 23:45:20,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:45:20,765 INFO L225 Difference]: With dead ends: 89911 [2019-10-14 23:45:20,766 INFO L226 Difference]: Without dead ends: 62258 [2019-10-14 23:45:20,793 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:45:21,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62258 states. [2019-10-14 23:45:23,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62258 to 38998. [2019-10-14 23:45:23,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38998 states. [2019-10-14 23:45:23,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38998 states to 38998 states and 61670 transitions. [2019-10-14 23:45:23,255 INFO L78 Accepts]: Start accepts. Automaton has 38998 states and 61670 transitions. Word has length 74 [2019-10-14 23:45:23,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:45:23,256 INFO L462 AbstractCegarLoop]: Abstraction has 38998 states and 61670 transitions. [2019-10-14 23:45:23,256 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:45:23,256 INFO L276 IsEmpty]: Start isEmpty. Operand 38998 states and 61670 transitions. [2019-10-14 23:45:23,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-10-14 23:45:23,256 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:45:23,257 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:45:23,257 INFO L410 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:45:23,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:45:23,257 INFO L82 PathProgramCache]: Analyzing trace with hash -818446556, now seen corresponding path program 1 times [2019-10-14 23:45:23,257 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:45:23,258 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003402088] [2019-10-14 23:45:23,258 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:45:23,258 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:45:23,258 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:45:23,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:45:23,535 WARN L191 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2019-10-14 23:45:23,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:45:23,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:45:23,550 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003402088] [2019-10-14 23:45:23,551 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:45:23,551 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 23:45:23,551 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861068352] [2019-10-14 23:45:23,551 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:45:23,552 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:45:23,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:45:23,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:45:23,552 INFO L87 Difference]: Start difference. First operand 38998 states and 61670 transitions. Second operand 6 states.