/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/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -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.BOUNDED-6.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 20:13:56,586 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 20:13:56,589 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 20:13:56,633 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 20:13:56,634 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 20:13:56,642 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 20:13:56,644 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 20:13:56,647 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 20:13:56,650 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 20:13:56,653 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 20:13:56,654 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 20:13:56,655 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 20:13:56,655 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 20:13:56,658 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 20:13:56,661 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 20:13:56,664 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 20:13:56,665 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 20:13:56,666 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 20:13:56,667 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 20:13:56,677 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 20:13:56,680 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 20:13:56,681 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 20:13:56,681 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 20:13:56,682 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 20:13:56,694 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 20:13:56,694 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 20:13:56,695 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 20:13:56,695 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 20:13:56,696 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 20:13:56,698 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 20:13:56,698 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 20:13:56,700 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 20:13:56,700 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 20:13:56,701 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 20:13:56,702 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 20:13:56,702 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 20:13:56,703 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 20:13:56,703 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 20:13:56,703 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 20:13:56,706 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 20:13:56,707 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 20:13:56,708 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-12 20:13:56,740 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 20:13:56,740 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 20:13:56,742 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 20:13:56,742 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 20:13:56,742 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 20:13:56,742 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 20:13:56,742 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 20:13:56,743 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 20:13:56,743 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 20:13:56,743 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 20:13:56,743 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 20:13:56,743 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 20:13:56,744 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 20:13:56,744 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 20:13:56,744 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 20:13:56,744 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 20:13:56,744 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 20:13:56,745 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 20:13:56,745 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 20:13:56,745 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 20:13:56,745 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 20:13:56,745 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 20:13:56,746 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 20:13:56,746 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 20:13:56,746 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 20:13:56,746 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 20:13:56,746 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 20:13:56,747 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 20:13:56,747 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 20:13:56,747 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 20:13:57,066 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 20:13:57,082 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 20:13:57,088 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 20:13:57,090 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 20:13:57,090 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 20:13:57,091 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-12 20:13:57,150 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/52faf6fdd/a2105c1a3261483a8fd2cae12c599f4f/FLAG8b5a8e755 [2020-10-12 20:13:57,639 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 20:13:57,640 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-12 20:13:57,667 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/52faf6fdd/a2105c1a3261483a8fd2cae12c599f4f/FLAG8b5a8e755 [2020-10-12 20:13:57,936 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/52faf6fdd/a2105c1a3261483a8fd2cae12c599f4f [2020-10-12 20:13:57,944 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 20:13:57,945 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 20:13:57,947 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 20:13:57,947 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 20:13:57,951 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 20:13:57,952 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 08:13:57" (1/1) ... [2020-10-12 20:13:57,955 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e4956b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:13:57, skipping insertion in model container [2020-10-12 20:13:57,955 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 08:13:57" (1/1) ... [2020-10-12 20:13:57,963 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 20:13:58,010 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 20:13:58,306 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 20:13:58,320 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 20:13:58,516 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 20:13:58,539 INFO L208 MainTranslator]: Completed translation [2020-10-12 20:13:58,539 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:13:58 WrapperNode [2020-10-12 20:13:58,540 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 20:13:58,540 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 20:13:58,540 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 20:13:58,541 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 20:13:58,553 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:13:58" (1/1) ... [2020-10-12 20:13:58,553 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:13:58" (1/1) ... [2020-10-12 20:13:58,566 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:13:58" (1/1) ... [2020-10-12 20:13:58,566 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:13:58" (1/1) ... [2020-10-12 20:13:58,583 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:13:58" (1/1) ... [2020-10-12 20:13:58,596 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:13:58" (1/1) ... [2020-10-12 20:13:58,599 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:13:58" (1/1) ... [2020-10-12 20:13:58,606 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 20:13:58,607 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 20:13:58,607 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 20:13:58,607 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 20:13:58,608 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:13:58" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-12 20:13:58,676 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 20:13:58,676 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 20:13:58,676 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-12 20:13:58,676 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 20:13:58,676 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 20:13:58,676 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-12 20:13:58,677 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-12 20:13:58,677 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-12 20:13:58,679 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-12 20:13:58,680 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-12 20:13:58,680 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-12 20:13:58,680 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-12 20:13:58,680 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-12 20:13:58,680 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-12 20:13:58,680 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-12 20:13:58,681 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-12 20:13:58,681 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-12 20:13:58,682 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 20:13:58,682 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 20:13:58,682 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 20:13:59,457 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 20:13:59,457 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-12 20:13:59,462 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 08:13:59 BoogieIcfgContainer [2020-10-12 20:13:59,463 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 20:13:59,464 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 20:13:59,464 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 20:13:59,468 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 20:13:59,468 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 08:13:57" (1/3) ... [2020-10-12 20:13:59,469 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ded4678 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 08:13:59, skipping insertion in model container [2020-10-12 20:13:59,469 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:13:58" (2/3) ... [2020-10-12 20:13:59,470 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ded4678 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 08:13:59, skipping insertion in model container [2020-10-12 20:13:59,470 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 08:13:59" (3/3) ... [2020-10-12 20:13:59,472 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-12 20:13:59,483 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 20:13:59,491 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 20:13:59,505 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 20:13:59,531 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 20:13:59,531 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 20:13:59,532 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 20:13:59,532 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 20:13:59,532 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 20:13:59,532 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 20:13:59,533 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 20:13:59,533 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 20:13:59,556 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states. [2020-10-12 20:13:59,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-12 20:13:59,568 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:13:59,569 INFO L422 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] [2020-10-12 20:13:59,570 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:13:59,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:13:59,576 INFO L82 PathProgramCache]: Analyzing trace with hash -1156285635, now seen corresponding path program 1 times [2020-10-12 20:13:59,586 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:13:59,586 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1900788560] [2020-10-12 20:13:59,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:13:59,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:14:00,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:00,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:00,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:00,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:01,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:14:01,923 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-12 20:14:01,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 20:14:01,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2017 [2020-10-12 20:14:01,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:14:01,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 20:14:01,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-12 20:14:01,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 20:14:01,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-12 20:14:02,321 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-12 20:14:02,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:14:02,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:14:02,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:02,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:14:02,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:14:02,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:14:02,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-12 20:14:02,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:14:02,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:14:02,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:14:02,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:14:02,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:14:02,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:14:02,386 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1900788560] [2020-10-12 20:14:02,388 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:14:02,389 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 20:14:02,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69131308] [2020-10-12 20:14:02,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 20:14:02,398 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:14:02,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 20:14:02,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 20:14:02,416 INFO L87 Difference]: Start difference. First operand 148 states. Second operand 6 states. [2020-10-12 20:14:02,711 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-12 20:14:03,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:14:03,725 INFO L93 Difference]: Finished difference Result 706 states and 1176 transitions. [2020-10-12 20:14:03,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 20:14:03,728 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 60 [2020-10-12 20:14:03,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:14:03,749 INFO L225 Difference]: With dead ends: 706 [2020-10-12 20:14:03,749 INFO L226 Difference]: Without dead ends: 589 [2020-10-12 20:14:03,754 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-12 20:14:03,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2020-10-12 20:14:03,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 231. [2020-10-12 20:14:03,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2020-10-12 20:14:03,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 368 transitions. [2020-10-12 20:14:03,833 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 368 transitions. Word has length 60 [2020-10-12 20:14:03,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:14:03,834 INFO L479 AbstractCegarLoop]: Abstraction has 231 states and 368 transitions. [2020-10-12 20:14:03,834 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 20:14:03,835 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 368 transitions. [2020-10-12 20:14:03,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-12 20:14:03,838 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:14:03,838 INFO L422 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] [2020-10-12 20:14:03,838 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 20:14:03,839 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:14:03,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:14:03,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1546726785, now seen corresponding path program 1 times [2020-10-12 20:14:03,839 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:14:03,840 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [676440015] [2020-10-12 20:14:03,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:14:03,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:14:03,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:03,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:04,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:04,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:04,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:06,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:14:06,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-12 20:14:06,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 20:14:06,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2623 [2020-10-12 20:14:06,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:14:06,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 20:14:06,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-12 20:14:06,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 20:14:06,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:14:06,774 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-12 20:14:06,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:14:06,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:14:06,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:06,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:14:06,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:14:06,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:14:06,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-12 20:14:06,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:14:06,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:14:06,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:14:06,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:14:06,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-10-12 20:14:06,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:14:06,826 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [676440015] [2020-10-12 20:14:06,827 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:14:06,827 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 20:14:06,827 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528109237] [2020-10-12 20:14:06,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 20:14:06,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:14:06,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 20:14:06,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 20:14:06,830 INFO L87 Difference]: Start difference. First operand 231 states and 368 transitions. Second operand 7 states. [2020-10-12 20:14:07,106 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-12 20:14:08,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:14:08,350 INFO L93 Difference]: Finished difference Result 1477 states and 2436 transitions. [2020-10-12 20:14:08,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 20:14:08,351 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 61 [2020-10-12 20:14:08,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:14:08,359 INFO L225 Difference]: With dead ends: 1477 [2020-10-12 20:14:08,360 INFO L226 Difference]: Without dead ends: 1301 [2020-10-12 20:14:08,367 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-12 20:14:08,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1301 states. [2020-10-12 20:14:08,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1301 to 688. [2020-10-12 20:14:08,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 688 states. [2020-10-12 20:14:08,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 688 states to 688 states and 1127 transitions. [2020-10-12 20:14:08,462 INFO L78 Accepts]: Start accepts. Automaton has 688 states and 1127 transitions. Word has length 61 [2020-10-12 20:14:08,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:14:08,463 INFO L479 AbstractCegarLoop]: Abstraction has 688 states and 1127 transitions. [2020-10-12 20:14:08,463 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 20:14:08,463 INFO L276 IsEmpty]: Start isEmpty. Operand 688 states and 1127 transitions. [2020-10-12 20:14:08,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-12 20:14:08,472 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:14:08,472 INFO L422 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] [2020-10-12 20:14:08,473 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 20:14:08,473 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:14:08,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:14:08,473 INFO L82 PathProgramCache]: Analyzing trace with hash -760942524, now seen corresponding path program 1 times [2020-10-12 20:14:08,474 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:14:08,474 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [754372922] [2020-10-12 20:14:08,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:14:08,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:14:08,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:08,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:08,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:08,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:08,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:10,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:14:10,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-12 20:14:10,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 20:14:10,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1953 [2020-10-12 20:14:10,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:14:10,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 20:14:10,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-12 20:14:10,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-12 20:14:10,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:14:10,727 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-12 20:14:10,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:14:10,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:14:10,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:10,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:14:10,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:14:10,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:14:10,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 20:14:10,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:14:10,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:14:10,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:14:10,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:14:10,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:14:10,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:14:10,763 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [754372922] [2020-10-12 20:14:10,763 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:14:10,764 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 20:14:10,765 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392004983] [2020-10-12 20:14:10,765 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 20:14:10,766 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:14:10,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 20:14:10,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 20:14:10,767 INFO L87 Difference]: Start difference. First operand 688 states and 1127 transitions. Second operand 7 states. [2020-10-12 20:14:11,005 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-12 20:14:12,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:14:12,367 INFO L93 Difference]: Finished difference Result 4270 states and 7057 transitions. [2020-10-12 20:14:12,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 20:14:12,368 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 62 [2020-10-12 20:14:12,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:14:12,392 INFO L225 Difference]: With dead ends: 4270 [2020-10-12 20:14:12,393 INFO L226 Difference]: Without dead ends: 3693 [2020-10-12 20:14:12,398 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-12 20:14:12,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3693 states. [2020-10-12 20:14:12,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3693 to 1992. [2020-10-12 20:14:12,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1992 states. [2020-10-12 20:14:12,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1992 states to 1992 states and 3279 transitions. [2020-10-12 20:14:12,624 INFO L78 Accepts]: Start accepts. Automaton has 1992 states and 3279 transitions. Word has length 62 [2020-10-12 20:14:12,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:14:12,625 INFO L479 AbstractCegarLoop]: Abstraction has 1992 states and 3279 transitions. [2020-10-12 20:14:12,625 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 20:14:12,626 INFO L276 IsEmpty]: Start isEmpty. Operand 1992 states and 3279 transitions. [2020-10-12 20:14:12,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-12 20:14:12,628 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:14:12,628 INFO L422 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] [2020-10-12 20:14:12,629 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 20:14:12,629 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:14:12,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:14:12,630 INFO L82 PathProgramCache]: Analyzing trace with hash 2128091110, now seen corresponding path program 1 times [2020-10-12 20:14:12,631 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:14:12,631 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [662226351] [2020-10-12 20:14:12,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:14:12,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:14:12,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:12,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:12,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:13,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:13,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:14,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:14:14,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-12 20:14:14,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 20:14:14,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1730 [2020-10-12 20:14:14,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:14:14,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 20:14:14,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-12 20:14:14,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 20:14:14,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:14:14,627 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-12 20:14:14,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:14:14,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:14:14,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:14,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:14:14,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:14:14,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:14:14,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-12 20:14:14,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:14:14,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:14:14,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:14:14,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:14:14,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:14:14,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:14:14,668 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [662226351] [2020-10-12 20:14:14,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:14:14,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 20:14:14,669 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270920800] [2020-10-12 20:14:14,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 20:14:14,669 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:14:14,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 20:14:14,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 20:14:14,670 INFO L87 Difference]: Start difference. First operand 1992 states and 3279 transitions. Second operand 7 states. [2020-10-12 20:14:14,920 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-12 20:14:16,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:14:16,503 INFO L93 Difference]: Finished difference Result 12165 states and 20056 transitions. [2020-10-12 20:14:16,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 20:14:16,503 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 63 [2020-10-12 20:14:16,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:14:16,558 INFO L225 Difference]: With dead ends: 12165 [2020-10-12 20:14:16,558 INFO L226 Difference]: Without dead ends: 10328 [2020-10-12 20:14:16,566 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-12 20:14:16,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10328 states. [2020-10-12 20:14:16,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10328 to 5587. [2020-10-12 20:14:16,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5587 states. [2020-10-12 20:14:16,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5587 states to 5587 states and 9185 transitions. [2020-10-12 20:14:16,976 INFO L78 Accepts]: Start accepts. Automaton has 5587 states and 9185 transitions. Word has length 63 [2020-10-12 20:14:16,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:14:16,977 INFO L479 AbstractCegarLoop]: Abstraction has 5587 states and 9185 transitions. [2020-10-12 20:14:16,977 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 20:14:16,977 INFO L276 IsEmpty]: Start isEmpty. Operand 5587 states and 9185 transitions. [2020-10-12 20:14:16,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-12 20:14:16,978 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:14:16,979 INFO L422 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] [2020-10-12 20:14:16,979 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 20:14:16,979 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:14:16,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:14:16,980 INFO L82 PathProgramCache]: Analyzing trace with hash 391414520, now seen corresponding path program 1 times [2020-10-12 20:14:16,980 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:14:16,980 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1056434542] [2020-10-12 20:14:16,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:14:17,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:14:17,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:17,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:17,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:17,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:17,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:19,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:19,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:22,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:14:22,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-12 20:14:22,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 20:14:22,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-12 20:14:22,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:14:22,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 20:14:22,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-12 20:14:22,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 20:14:22,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 20:14:22,301 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-12 20:14:22,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:14:22,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:14:22,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:22,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:14:22,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:14:22,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:14:22,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-12 20:14:22,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:14:22,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:14:22,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:14:22,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:14:22,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:14:22,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:14:22,334 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1056434542] [2020-10-12 20:14:22,334 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:14:22,335 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 20:14:22,335 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511186309] [2020-10-12 20:14:22,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 20:14:22,336 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:14:22,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 20:14:22,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 20:14:22,337 INFO L87 Difference]: Start difference. First operand 5587 states and 9185 transitions. Second operand 6 states. [2020-10-12 20:14:22,602 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2020-10-12 20:14:24,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:14:24,182 INFO L93 Difference]: Finished difference Result 22013 states and 36216 transitions. [2020-10-12 20:14:24,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 20:14:24,182 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 64 [2020-10-12 20:14:24,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:14:24,248 INFO L225 Difference]: With dead ends: 22013 [2020-10-12 20:14:24,248 INFO L226 Difference]: Without dead ends: 16582 [2020-10-12 20:14:24,261 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-12 20:14:24,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16582 states. [2020-10-12 20:14:24,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16582 to 10751. [2020-10-12 20:14:24,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10751 states. [2020-10-12 20:14:24,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10751 states to 10751 states and 17642 transitions. [2020-10-12 20:14:24,929 INFO L78 Accepts]: Start accepts. Automaton has 10751 states and 17642 transitions. Word has length 64 [2020-10-12 20:14:24,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:14:24,929 INFO L479 AbstractCegarLoop]: Abstraction has 10751 states and 17642 transitions. [2020-10-12 20:14:24,929 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 20:14:24,929 INFO L276 IsEmpty]: Start isEmpty. Operand 10751 states and 17642 transitions. [2020-10-12 20:14:24,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-12 20:14:24,931 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:14:24,931 INFO L422 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] [2020-10-12 20:14:24,931 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 20:14:24,931 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:14:24,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:14:24,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1641760598, now seen corresponding path program 1 times [2020-10-12 20:14:24,932 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:14:24,932 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [369566479] [2020-10-12 20:14:24,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:14:24,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:14:24,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:24,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:25,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:25,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:25,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:26,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:26,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:29,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:14:29,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-12 20:14:29,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 20:14:29,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-12 20:14:29,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:14:29,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 20:14:29,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-12 20:14:29,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 20:14:29,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:14:30,195 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-12 20:14:30,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:14:30,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:14:30,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:30,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:14:30,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:14:30,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:14:30,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-12 20:14:30,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:14:30,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:14:30,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:14:30,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:14:30,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 20:14:30,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:14:30,246 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [369566479] [2020-10-12 20:14:30,248 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:14:30,248 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 20:14:30,249 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351934540] [2020-10-12 20:14:30,249 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 20:14:30,250 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:14:30,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 20:14:30,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 20:14:30,251 INFO L87 Difference]: Start difference. First operand 10751 states and 17642 transitions. Second operand 6 states. [2020-10-12 20:14:30,511 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2020-10-12 20:14:32,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:14:32,267 INFO L93 Difference]: Finished difference Result 29463 states and 48321 transitions. [2020-10-12 20:14:32,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 20:14:32,268 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 64 [2020-10-12 20:14:32,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:14:32,334 INFO L225 Difference]: With dead ends: 29463 [2020-10-12 20:14:32,334 INFO L226 Difference]: Without dead ends: 23292 [2020-10-12 20:14:32,353 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-12 20:14:32,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23292 states. [2020-10-12 20:14:33,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23292 to 17227. [2020-10-12 20:14:33,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17227 states. [2020-10-12 20:14:33,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17227 states to 17227 states and 28265 transitions. [2020-10-12 20:14:33,321 INFO L78 Accepts]: Start accepts. Automaton has 17227 states and 28265 transitions. Word has length 64 [2020-10-12 20:14:33,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:14:33,321 INFO L479 AbstractCegarLoop]: Abstraction has 17227 states and 28265 transitions. [2020-10-12 20:14:33,321 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 20:14:33,321 INFO L276 IsEmpty]: Start isEmpty. Operand 17227 states and 28265 transitions. [2020-10-12 20:14:33,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-12 20:14:33,323 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:14:33,323 INFO L422 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] [2020-10-12 20:14:33,323 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 20:14:33,323 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:14:33,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:14:33,324 INFO L82 PathProgramCache]: Analyzing trace with hash 634325172, now seen corresponding path program 1 times [2020-10-12 20:14:33,324 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:14:33,324 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1773958682] [2020-10-12 20:14:33,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:14:33,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:14:33,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:33,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:33,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:33,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:33,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:33,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:35,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:38,342 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:14:38,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-12 20:14:38,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 20:14:38,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-12 20:14:38,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:14:38,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 20:14:38,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-12 20:14:38,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 20:14:38,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:14:38,612 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-12 20:14:38,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:14:38,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:14:38,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:38,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:14:38,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:14:38,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:14:38,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-12 20:14:38,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:14:38,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:14:38,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:14:38,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:14:38,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:14:38,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:14:38,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1773958682] [2020-10-12 20:14:38,652 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:14:38,652 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 20:14:38,653 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303756955] [2020-10-12 20:14:38,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 20:14:38,655 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:14:38,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 20:14:38,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 20:14:38,656 INFO L87 Difference]: Start difference. First operand 17227 states and 28265 transitions. Second operand 6 states. [2020-10-12 20:14:38,975 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2020-10-12 20:14:40,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:14:40,573 INFO L93 Difference]: Finished difference Result 33689 states and 55254 transitions. [2020-10-12 20:14:40,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 20:14:40,574 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 64 [2020-10-12 20:14:40,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:14:40,650 INFO L225 Difference]: With dead ends: 33689 [2020-10-12 20:14:40,650 INFO L226 Difference]: Without dead ends: 27518 [2020-10-12 20:14:40,674 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-12 20:14:40,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27518 states. [2020-10-12 20:14:41,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27518 to 21519. [2020-10-12 20:14:41,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21519 states. [2020-10-12 20:14:41,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21519 states to 21519 states and 35307 transitions. [2020-10-12 20:14:41,910 INFO L78 Accepts]: Start accepts. Automaton has 21519 states and 35307 transitions. Word has length 64 [2020-10-12 20:14:41,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:14:41,911 INFO L479 AbstractCegarLoop]: Abstraction has 21519 states and 35307 transitions. [2020-10-12 20:14:41,911 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 20:14:41,911 INFO L276 IsEmpty]: Start isEmpty. Operand 21519 states and 35307 transitions. [2020-10-12 20:14:41,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-12 20:14:41,913 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:14:41,913 INFO L422 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] [2020-10-12 20:14:41,913 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 20:14:41,914 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:14:41,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:14:41,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1545428211, now seen corresponding path program 1 times [2020-10-12 20:14:41,914 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:14:41,915 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1853292766] [2020-10-12 20:14:41,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:14:41,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:14:41,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:41,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:42,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:42,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:42,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:42,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:42,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:44,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:46,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:14:46,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-12 20:14:46,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 20:14:46,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-12 20:14:46,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:14:46,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 20:14:46,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 20:14:46,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-12 20:14:46,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:14:47,277 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-12 20:14:47,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:14:47,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:14:47,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:47,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:14:47,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:14:47,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:14:47,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 20:14:47,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:14:47,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:14:47,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:14:47,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:14:47,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:14:47,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:14:47,318 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1853292766] [2020-10-12 20:14:47,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:14:47,319 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 20:14:47,319 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361577342] [2020-10-12 20:14:47,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 20:14:47,320 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:14:47,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 20:14:47,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 20:14:47,320 INFO L87 Difference]: Start difference. First operand 21519 states and 35307 transitions. Second operand 5 states. [2020-10-12 20:14:51,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:14:51,074 INFO L93 Difference]: Finished difference Result 62881 states and 103135 transitions. [2020-10-12 20:14:51,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 20:14:51,075 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 65 [2020-10-12 20:14:51,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:14:51,162 INFO L225 Difference]: With dead ends: 62881 [2020-10-12 20:14:51,162 INFO L226 Difference]: Without dead ends: 41387 [2020-10-12 20:14:51,209 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-12 20:14:51,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41387 states. [2020-10-12 20:14:53,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41387 to 41385. [2020-10-12 20:14:53,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41385 states. [2020-10-12 20:14:53,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41385 states to 41385 states and 67329 transitions. [2020-10-12 20:14:53,865 INFO L78 Accepts]: Start accepts. Automaton has 41385 states and 67329 transitions. Word has length 65 [2020-10-12 20:14:53,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:14:53,865 INFO L479 AbstractCegarLoop]: Abstraction has 41385 states and 67329 transitions. [2020-10-12 20:14:53,865 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 20:14:53,865 INFO L276 IsEmpty]: Start isEmpty. Operand 41385 states and 67329 transitions. [2020-10-12 20:14:53,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-12 20:14:53,868 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:14:53,868 INFO L422 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] [2020-10-12 20:14:53,868 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 20:14:53,868 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:14:53,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:14:53,869 INFO L82 PathProgramCache]: Analyzing trace with hash -706639482, now seen corresponding path program 1 times [2020-10-12 20:14:53,869 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:14:53,869 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [794732053] [2020-10-12 20:14:53,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:14:53,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:14:53,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:53,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:53,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:54,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:54,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:54,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:55,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:55,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:58,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:14:58,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-12 20:14:58,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 20:14:58,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-12 20:14:58,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:14:58,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 20:14:58,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-10-12 20:14:58,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 20:14:58,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:14:59,112 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-12 20:14:59,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:14:59,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:14:59,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:59,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:14:59,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:14:59,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:14:59,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 20:14:59,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:14:59,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:14:59,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:14:59,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:14:59,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:14:59,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:14:59,138 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [794732053] [2020-10-12 20:14:59,138 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:14:59,138 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 20:14:59,139 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392150850] [2020-10-12 20:14:59,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 20:14:59,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:14:59,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 20:14:59,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 20:14:59,140 INFO L87 Difference]: Start difference. First operand 41385 states and 67329 transitions. Second operand 7 states. [2020-10-12 20:14:59,369 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-12 20:15:04,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:15:04,537 INFO L93 Difference]: Finished difference Result 86440 states and 140697 transitions. [2020-10-12 20:15:04,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 20:15:04,538 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 65 [2020-10-12 20:15:04,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:15:04,662 INFO L225 Difference]: With dead ends: 86440 [2020-10-12 20:15:04,662 INFO L226 Difference]: Without dead ends: 66232 [2020-10-12 20:15:04,710 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-12 20:15:04,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66232 states. [2020-10-12 20:15:07,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66232 to 52058. [2020-10-12 20:15:07,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52058 states. [2020-10-12 20:15:07,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52058 states to 52058 states and 84720 transitions. [2020-10-12 20:15:07,981 INFO L78 Accepts]: Start accepts. Automaton has 52058 states and 84720 transitions. Word has length 65 [2020-10-12 20:15:07,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:15:07,981 INFO L479 AbstractCegarLoop]: Abstraction has 52058 states and 84720 transitions. [2020-10-12 20:15:07,981 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 20:15:07,981 INFO L276 IsEmpty]: Start isEmpty. Operand 52058 states and 84720 transitions. [2020-10-12 20:15:07,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-12 20:15:07,983 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:15:07,984 INFO L422 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] [2020-10-12 20:15:07,984 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 20:15:07,984 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:15:07,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:15:07,984 INFO L82 PathProgramCache]: Analyzing trace with hash -1872366616, now seen corresponding path program 1 times [2020-10-12 20:15:07,985 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:15:07,985 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [382717704] [2020-10-12 20:15:07,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:15:08,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:15:08,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:08,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:08,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:08,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:08,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:08,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:09,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:09,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:13,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:15:13,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-12 20:15:13,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 20:15:13,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 20:15:13,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:15:13,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 20:15:13,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-12 20:15:13,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 20:15:13,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:15:13,222 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-12 20:15:13,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:15:13,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:15:13,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:13,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:15:13,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:15:13,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:15:13,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 20:15:13,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:15:13,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:15:13,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:15:13,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:15:13,234 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:15:13,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:15:13,243 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [382717704] [2020-10-12 20:15:13,243 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:15:13,243 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 20:15:13,244 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297089206] [2020-10-12 20:15:13,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 20:15:13,244 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:15:13,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 20:15:13,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 20:15:13,245 INFO L87 Difference]: Start difference. First operand 52058 states and 84720 transitions. Second operand 7 states. [2020-10-12 20:15:13,476 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-12 20:15:19,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:15:19,101 INFO L93 Difference]: Finished difference Result 93265 states and 151796 transitions. [2020-10-12 20:15:19,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 20:15:19,101 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 65 [2020-10-12 20:15:19,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:15:19,202 INFO L225 Difference]: With dead ends: 93265 [2020-10-12 20:15:19,203 INFO L226 Difference]: Without dead ends: 73133 [2020-10-12 20:15:19,231 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-12 20:15:19,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73133 states. [2020-10-12 20:15:22,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73133 to 59443. [2020-10-12 20:15:22,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59443 states. [2020-10-12 20:15:22,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59443 states to 59443 states and 96747 transitions. [2020-10-12 20:15:22,866 INFO L78 Accepts]: Start accepts. Automaton has 59443 states and 96747 transitions. Word has length 65 [2020-10-12 20:15:22,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:15:22,867 INFO L479 AbstractCegarLoop]: Abstraction has 59443 states and 96747 transitions. [2020-10-12 20:15:22,867 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 20:15:22,867 INFO L276 IsEmpty]: Start isEmpty. Operand 59443 states and 96747 transitions. [2020-10-12 20:15:22,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-12 20:15:22,869 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:15:22,869 INFO L422 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] [2020-10-12 20:15:22,869 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 20:15:22,869 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:15:22,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:15:22,869 INFO L82 PathProgramCache]: Analyzing trace with hash -798511946, now seen corresponding path program 1 times [2020-10-12 20:15:22,869 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:15:22,870 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [25181075] [2020-10-12 20:15:22,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:15:22,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:15:22,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:22,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:22,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:23,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:23,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:23,477 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:15:23,477 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-12 20:15:23,477 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 20:15:23,477 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 584 [2020-10-12 20:15:23,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:15:23,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 20:15:23,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-12 20:15:23,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 20:15:23,478 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:15:23,716 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-12 20:15:23,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:15:23,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:15:23,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:23,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:15:23,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:15:23,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:15:23,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 20:15:23,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:15:23,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:15:23,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:15:23,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:15:23,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:15:23,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:15:23,738 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [25181075] [2020-10-12 20:15:23,739 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:15:23,739 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 20:15:23,739 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295673251] [2020-10-12 20:15:23,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 20:15:23,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:15:23,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 20:15:23,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 20:15:23,740 INFO L87 Difference]: Start difference. First operand 59443 states and 96747 transitions. Second operand 6 states. [2020-10-12 20:15:23,995 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-10-12 20:15:29,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:15:29,948 INFO L93 Difference]: Finished difference Result 129255 states and 210395 transitions. [2020-10-12 20:15:29,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 20:15:29,949 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2020-10-12 20:15:29,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:15:30,049 INFO L225 Difference]: With dead ends: 129255 [2020-10-12 20:15:30,050 INFO L226 Difference]: Without dead ends: 70095 [2020-10-12 20:15:30,113 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-12 20:15:30,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70095 states. [2020-10-12 20:15:33,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70095 to 59443. [2020-10-12 20:15:33,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59443 states. [2020-10-12 20:15:33,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59443 states to 59443 states and 96627 transitions. [2020-10-12 20:15:33,885 INFO L78 Accepts]: Start accepts. Automaton has 59443 states and 96627 transitions. Word has length 65 [2020-10-12 20:15:33,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:15:33,885 INFO L479 AbstractCegarLoop]: Abstraction has 59443 states and 96627 transitions. [2020-10-12 20:15:33,885 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 20:15:33,885 INFO L276 IsEmpty]: Start isEmpty. Operand 59443 states and 96627 transitions. [2020-10-12 20:15:33,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-12 20:15:33,887 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:15:33,887 INFO L422 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] [2020-10-12 20:15:33,888 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 20:15:33,888 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:15:33,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:15:33,888 INFO L82 PathProgramCache]: Analyzing trace with hash -1351024462, now seen corresponding path program 1 times [2020-10-12 20:15:33,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:15:33,889 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1555246298] [2020-10-12 20:15:33,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:15:33,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:15:33,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:33,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:33,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:34,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:34,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:34,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:35,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:37,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:15:37,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-12 20:15:37,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 20:15:37,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3215 [2020-10-12 20:15:37,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:15:37,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 20:15:37,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-12 20:15:37,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-12 20:15:37,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:15:37,319 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-12 20:15:37,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:15:37,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:15:37,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:37,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:15:37,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:15:37,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:15:37,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 20:15:37,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:15:37,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:15:37,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:15:37,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:15:37,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:15:37,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:15:37,339 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1555246298] [2020-10-12 20:15:37,339 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:15:37,339 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 20:15:37,339 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919667633] [2020-10-12 20:15:37,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 20:15:37,340 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:15:37,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 20:15:37,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 20:15:37,341 INFO L87 Difference]: Start difference. First operand 59443 states and 96627 transitions. Second operand 5 states. [2020-10-12 20:15:37,561 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-12 20:15:42,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:15:42,777 INFO L93 Difference]: Finished difference Result 107244 states and 174285 transitions. [2020-10-12 20:15:42,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 20:15:42,777 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 66 [2020-10-12 20:15:42,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:15:42,876 INFO L225 Difference]: With dead ends: 107244 [2020-10-12 20:15:42,877 INFO L226 Difference]: Without dead ends: 67556 [2020-10-12 20:15:42,921 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-12 20:15:42,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67556 states. [2020-10-12 20:15:47,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67556 to 63713. [2020-10-12 20:15:47,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63713 states. [2020-10-12 20:15:47,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63713 states to 63713 states and 103683 transitions. [2020-10-12 20:15:47,228 INFO L78 Accepts]: Start accepts. Automaton has 63713 states and 103683 transitions. Word has length 66 [2020-10-12 20:15:47,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:15:47,228 INFO L479 AbstractCegarLoop]: Abstraction has 63713 states and 103683 transitions. [2020-10-12 20:15:47,228 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 20:15:47,228 INFO L276 IsEmpty]: Start isEmpty. Operand 63713 states and 103683 transitions. [2020-10-12 20:15:47,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-12 20:15:47,230 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:15:47,230 INFO L422 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] [2020-10-12 20:15:47,231 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 20:15:47,231 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:15:47,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:15:47,231 INFO L82 PathProgramCache]: Analyzing trace with hash -293958580, now seen corresponding path program 1 times [2020-10-12 20:15:47,231 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:15:47,232 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1021349403] [2020-10-12 20:15:47,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:15:47,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:15:47,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:47,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:47,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:47,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:47,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:47,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:47,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:49,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:52,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:15:52,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-12 20:15:52,255 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 20:15:52,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-12 20:15:52,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:15:52,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 20:15:52,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 20:15:52,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-12 20:15:52,256 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:15:52,468 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-12 20:15:52,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:15:52,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:15:52,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:52,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:15:52,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:15:52,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:15:52,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 20:15:52,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:15:52,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:15:52,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:15:52,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:15:52,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:15:52,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:15:52,491 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1021349403] [2020-10-12 20:15:52,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:15:52,492 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 20:15:52,492 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261782592] [2020-10-12 20:15:52,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 20:15:52,492 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:15:52,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 20:15:52,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 20:15:52,493 INFO L87 Difference]: Start difference. First operand 63713 states and 103683 transitions. Second operand 5 states. [2020-10-12 20:16:01,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:16:01,678 INFO L93 Difference]: Finished difference Result 186138 states and 302679 transitions. [2020-10-12 20:16:01,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 20:16:01,682 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 66 [2020-10-12 20:16:01,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:16:01,880 INFO L225 Difference]: With dead ends: 186138 [2020-10-12 20:16:01,880 INFO L226 Difference]: Without dead ends: 122457 [2020-10-12 20:16:01,944 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-12 20:16:02,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122457 states. [2020-10-12 20:16:12,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122457 to 122455. [2020-10-12 20:16:12,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122455 states. [2020-10-12 20:16:12,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122455 states to 122455 states and 197312 transitions. [2020-10-12 20:16:12,825 INFO L78 Accepts]: Start accepts. Automaton has 122455 states and 197312 transitions. Word has length 66 [2020-10-12 20:16:12,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:16:12,826 INFO L479 AbstractCegarLoop]: Abstraction has 122455 states and 197312 transitions. [2020-10-12 20:16:12,826 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 20:16:12,826 INFO L276 IsEmpty]: Start isEmpty. Operand 122455 states and 197312 transitions. [2020-10-12 20:16:12,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-12 20:16:12,830 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:16:12,830 INFO L422 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] [2020-10-12 20:16:12,830 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 20:16:12,831 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:16:12,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:16:12,831 INFO L82 PathProgramCache]: Analyzing trace with hash 2029124603, now seen corresponding path program 1 times [2020-10-12 20:16:12,831 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:16:12,832 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [551760961] [2020-10-12 20:16:12,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:16:12,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:16:12,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:12,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:12,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:12,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:13,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:13,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:13,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:13,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:17,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:16:17,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-12 20:16:17,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 20:16:17,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-12 20:16:17,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:16:17,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 20:16:17,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-12 20:16:17,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-12 20:16:17,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:16:18,066 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-12 20:16:18,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:16:18,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:16:18,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:18,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:16:18,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:16:18,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:16:18,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 20:16:18,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:16:18,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:16:18,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:16:18,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:16:18,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:16:18,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:16:18,090 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [551760961] [2020-10-12 20:16:18,090 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:16:18,090 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 20:16:18,090 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634550425] [2020-10-12 20:16:18,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 20:16:18,091 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:16:18,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 20:16:18,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 20:16:18,091 INFO L87 Difference]: Start difference. First operand 122455 states and 197312 transitions. Second operand 7 states. [2020-10-12 20:16:18,328 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-12 20:16:31,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:16:31,655 INFO L93 Difference]: Finished difference Result 239587 states and 386225 transitions. [2020-10-12 20:16:31,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 20:16:31,656 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 66 [2020-10-12 20:16:31,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:16:31,910 INFO L225 Difference]: With dead ends: 239587 [2020-10-12 20:16:31,910 INFO L226 Difference]: Without dead ends: 173481 [2020-10-12 20:16:31,962 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-12 20:16:32,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173481 states. [2020-10-12 20:16:45,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173481 to 142285. [2020-10-12 20:16:45,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142285 states. [2020-10-12 20:16:45,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142285 states to 142285 states and 229346 transitions. [2020-10-12 20:16:45,722 INFO L78 Accepts]: Start accepts. Automaton has 142285 states and 229346 transitions. Word has length 66 [2020-10-12 20:16:45,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:16:45,722 INFO L479 AbstractCegarLoop]: Abstraction has 142285 states and 229346 transitions. [2020-10-12 20:16:45,723 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 20:16:45,723 INFO L276 IsEmpty]: Start isEmpty. Operand 142285 states and 229346 transitions. [2020-10-12 20:16:45,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-12 20:16:45,726 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:16:45,727 INFO L422 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] [2020-10-12 20:16:45,727 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 20:16:45,727 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:16:45,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:16:45,727 INFO L82 PathProgramCache]: Analyzing trace with hash -225400618, now seen corresponding path program 1 times [2020-10-12 20:16:45,727 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:16:45,728 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [37282889] [2020-10-12 20:16:45,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:16:45,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:16:45,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:45,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:45,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:45,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:46,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:46,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:16:46,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-12 20:16:46,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 20:16:46,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 360 [2020-10-12 20:16:46,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:16:46,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 20:16:46,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-12 20:16:46,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 20:16:46,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:16:46,299 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-12 20:16:46,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:16:46,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:16:46,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:46,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:16:46,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:16:46,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:16:46,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 20:16:46,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:16:46,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:16:46,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:16:46,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:16:46,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:16:46,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:16:46,322 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [37282889] [2020-10-12 20:16:46,323 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:16:46,323 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 20:16:46,323 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534492538] [2020-10-12 20:16:46,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 20:16:46,323 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:16:46,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 20:16:46,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 20:16:46,324 INFO L87 Difference]: Start difference. First operand 142285 states and 229346 transitions. Second operand 4 states. [2020-10-12 20:16:46,511 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-12 20:17:02,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:17:02,441 INFO L93 Difference]: Finished difference Result 337353 states and 542940 transitions. [2020-10-12 20:17:02,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 20:17:02,441 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 66 [2020-10-12 20:17:02,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:17:02,791 INFO L225 Difference]: With dead ends: 337353 [2020-10-12 20:17:02,792 INFO L226 Difference]: Without dead ends: 195443 [2020-10-12 20:17:03,183 INFO L675 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 [2020-10-12 20:17:03,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195443 states. [2020-10-12 20:17:21,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195443 to 195441. [2020-10-12 20:17:21,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195441 states. [2020-10-12 20:17:22,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195441 states to 195441 states and 313346 transitions. [2020-10-12 20:17:22,238 INFO L78 Accepts]: Start accepts. Automaton has 195441 states and 313346 transitions. Word has length 66 [2020-10-12 20:17:22,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:17:22,238 INFO L479 AbstractCegarLoop]: Abstraction has 195441 states and 313346 transitions. [2020-10-12 20:17:22,238 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 20:17:22,238 INFO L276 IsEmpty]: Start isEmpty. Operand 195441 states and 313346 transitions. [2020-10-12 20:17:22,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-12 20:17:22,242 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:17:22,242 INFO L422 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] [2020-10-12 20:17:22,242 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 20:17:22,242 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:17:22,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:17:22,243 INFO L82 PathProgramCache]: Analyzing trace with hash 474188130, now seen corresponding path program 1 times [2020-10-12 20:17:22,243 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:17:22,243 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1677485978] [2020-10-12 20:17:22,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:17:22,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:17:22,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:22,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:22,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:22,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:22,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:22,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:22,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:24,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:27,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:17:27,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-12 20:17:27,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 20:17:27,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 20:17:27,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:17:27,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 20:17:27,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-12 20:17:27,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 20:17:27,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:17:27,486 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-12 20:17:27,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:17:27,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:17:27,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:17:27,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:17:27,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:17:27,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:17:27,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 20:17:27,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:17:27,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:17:27,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:17:27,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:17:27,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:17:27,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:17:27,510 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1677485978] [2020-10-12 20:17:27,510 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:17:27,510 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 20:17:27,510 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906597657] [2020-10-12 20:17:27,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 20:17:27,511 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:17:27,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 20:17:27,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-12 20:17:27,512 INFO L87 Difference]: Start difference. First operand 195441 states and 313346 transitions. Second operand 5 states. [2020-10-12 20:17:27,731 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 174