/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --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_lcr-var-start-time.6.ufo.BOUNDED-12.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-15 03:58:22,679 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-15 03:58:22,682 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-15 03:58:22,715 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-15 03:58:22,715 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-15 03:58:22,724 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-15 03:58:22,725 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-15 03:58:22,727 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-15 03:58:22,730 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-15 03:58:22,733 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-15 03:58:22,734 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-15 03:58:22,737 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-15 03:58:22,737 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-15 03:58:22,740 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-15 03:58:22,743 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-15 03:58:22,746 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-15 03:58:22,747 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-15 03:58:22,749 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-15 03:58:22,751 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-15 03:58:22,759 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-15 03:58:22,761 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-15 03:58:22,762 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-15 03:58:22,763 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-15 03:58:22,764 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-15 03:58:22,776 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-15 03:58:22,777 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-15 03:58:22,777 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-15 03:58:22,778 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-15 03:58:22,778 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-15 03:58:22,779 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-15 03:58:22,780 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-15 03:58:22,781 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-15 03:58:22,781 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-15 03:58:22,786 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-15 03:58:22,787 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-15 03:58:22,787 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-15 03:58:22,790 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-15 03:58:22,791 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-15 03:58:22,791 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-15 03:58:22,792 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-15 03:58:22,795 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-15 03:58:22,795 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 [2020-10-15 03:58:22,831 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-15 03:58:22,831 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-15 03:58:22,832 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-15 03:58:22,833 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-15 03:58:22,833 INFO L138 SettingsManager]: * Use SBE=true [2020-10-15 03:58:22,833 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-15 03:58:22,833 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-15 03:58:22,834 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-15 03:58:22,834 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-15 03:58:22,834 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-15 03:58:22,834 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-15 03:58:22,835 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-15 03:58:22,835 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-15 03:58:22,835 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-15 03:58:22,835 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-15 03:58:22,835 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-15 03:58:22,835 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-15 03:58:22,836 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-15 03:58:22,836 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-15 03:58:22,836 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-15 03:58:22,836 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-15 03:58:22,836 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-15 03:58:22,837 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-15 03:58:22,837 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-15 03:58:22,837 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-15 03:58:22,837 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-15 03:58:22,837 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-15 03:58:22,838 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-15 03:58:22,838 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-15 03:58:22,838 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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; [2020-10-15 03:58:23,130 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-15 03:58:23,144 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-15 03:58:23,148 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-15 03:58:23,149 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-15 03:58:23,150 INFO L275 PluginConnector]: CDTParser initialized [2020-10-15 03:58:23,151 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.6.ufo.BOUNDED-12.pals.c.v+cfa-reducer.c [2020-10-15 03:58:23,220 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d33ae3f69/fa4d6afec0d04abe8e9aede55f8adcdf/FLAGd2564a727 [2020-10-15 03:58:23,715 INFO L306 CDTParser]: Found 1 translation units. [2020-10-15 03:58:23,716 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.6.ufo.BOUNDED-12.pals.c.v+cfa-reducer.c [2020-10-15 03:58:23,732 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d33ae3f69/fa4d6afec0d04abe8e9aede55f8adcdf/FLAGd2564a727 [2020-10-15 03:58:24,092 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d33ae3f69/fa4d6afec0d04abe8e9aede55f8adcdf [2020-10-15 03:58:24,103 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-15 03:58:24,106 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-15 03:58:24,109 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-15 03:58:24,109 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-15 03:58:24,113 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-15 03:58:24,114 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:58:24" (1/1) ... [2020-10-15 03:58:24,117 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7bf2a9e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:58:24, skipping insertion in model container [2020-10-15 03:58:24,117 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:58:24" (1/1) ... [2020-10-15 03:58:24,127 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-15 03:58:24,193 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-15 03:58:24,641 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 03:58:24,661 INFO L203 MainTranslator]: Completed pre-run [2020-10-15 03:58:24,759 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 03:58:24,783 INFO L208 MainTranslator]: Completed translation [2020-10-15 03:58:24,784 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:58:24 WrapperNode [2020-10-15 03:58:24,784 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-15 03:58:24,785 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-15 03:58:24,785 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-15 03:58:24,785 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-15 03:58:24,800 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:58:24" (1/1) ... [2020-10-15 03:58:24,802 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:58:24" (1/1) ... [2020-10-15 03:58:24,819 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:58:24" (1/1) ... [2020-10-15 03:58:24,820 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:58:24" (1/1) ... [2020-10-15 03:58:24,845 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:58:24" (1/1) ... [2020-10-15 03:58:24,865 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:58:24" (1/1) ... [2020-10-15 03:58:24,868 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:58:24" (1/1) ... [2020-10-15 03:58:24,873 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-15 03:58:24,874 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-15 03:58:24,874 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-15 03:58:24,874 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-15 03:58:24,875 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:58:24" (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 [2020-10-15 03:58:24,934 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-15 03:58:24,934 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-15 03:58:24,934 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-15 03:58:24,935 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-15 03:58:24,935 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-15 03:58:24,936 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-15 03:58:24,936 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-15 03:58:24,937 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-15 03:58:24,937 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-15 03:58:24,937 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-15 03:58:24,937 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-15 03:58:24,938 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-15 03:58:24,938 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-15 03:58:24,938 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-15 03:58:24,938 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-15 03:58:24,939 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-15 03:58:24,939 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-15 03:58:24,939 INFO L130 BoogieDeclarations]: Found specification of procedure node6 [2020-10-15 03:58:24,940 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-15 03:58:24,940 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-15 03:58:24,941 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-15 03:58:24,941 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-15 03:58:24,942 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-15 03:58:25,739 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-15 03:58:25,740 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-15 03:58:25,746 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:58:25 BoogieIcfgContainer [2020-10-15 03:58:25,746 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-15 03:58:25,748 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-15 03:58:25,748 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-15 03:58:25,751 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-15 03:58:25,751 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 03:58:24" (1/3) ... [2020-10-15 03:58:25,752 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58ce6e45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:58:25, skipping insertion in model container [2020-10-15 03:58:25,753 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:58:24" (2/3) ... [2020-10-15 03:58:25,753 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58ce6e45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:58:25, skipping insertion in model container [2020-10-15 03:58:25,753 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:58:25" (3/3) ... [2020-10-15 03:58:25,755 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.6.ufo.BOUNDED-12.pals.c.v+cfa-reducer.c [2020-10-15 03:58:25,766 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-15 03:58:25,775 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-15 03:58:25,790 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-15 03:58:25,814 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-15 03:58:25,815 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-15 03:58:25,815 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-15 03:58:25,815 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-15 03:58:25,815 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-15 03:58:25,815 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-15 03:58:25,815 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-15 03:58:25,815 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-15 03:58:25,837 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states. [2020-10-15 03:58:25,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-15 03:58:25,849 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:58:25,851 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:58:25,851 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:58:25,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:58:25,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1068794681, now seen corresponding path program 1 times [2020-10-15 03:58:25,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:58:25,867 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1456625389] [2020-10-15 03:58:25,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:58:26,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:58:26,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:58:26,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:58:26,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:58:26,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:58:27,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:58:28,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:58:28,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:58:31,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:58:31,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-15 03:58:31,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-15 03:58:31,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-15 03:58:31,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:58:31,199 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:58:31,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-15 03:58:31,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-15 03:58:31,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-15 03:58:31,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-10-15 03:58:31,921 WARN L193 SmtUtils]: Spent 348.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-15 03:58:31,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:58:31,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:58:31,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:58:31,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:58:31,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:58:31,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:58:31,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-15 03:58:31,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:58:31,957 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:58:31,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:58:31,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:58:31,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:58:31,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:58:32,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:58:32,019 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1456625389] [2020-10-15 03:58:32,021 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:58:32,022 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-15 03:58:32,023 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978207848] [2020-10-15 03:58:32,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 03:58:32,031 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:58:32,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 03:58:32,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-15 03:58:32,058 INFO L87 Difference]: Start difference. First operand 168 states. Second operand 9 states. [2020-10-15 03:58:32,615 WARN L193 SmtUtils]: Spent 424.00 ms on a formula simplification that was a NOOP. DAG size: 181 [2020-10-15 03:58:34,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:58:34,002 INFO L93 Difference]: Finished difference Result 1008 states and 1610 transitions. [2020-10-15 03:58:34,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-15 03:58:34,004 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 77 [2020-10-15 03:58:34,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:58:34,027 INFO L225 Difference]: With dead ends: 1008 [2020-10-15 03:58:34,027 INFO L226 Difference]: Without dead ends: 860 [2020-10-15 03:58:34,033 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2020-10-15 03:58:34,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 860 states. [2020-10-15 03:58:34,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 860 to 278. [2020-10-15 03:58:34,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2020-10-15 03:58:34,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 415 transitions. [2020-10-15 03:58:34,114 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 415 transitions. Word has length 77 [2020-10-15 03:58:34,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:58:34,115 INFO L479 AbstractCegarLoop]: Abstraction has 278 states and 415 transitions. [2020-10-15 03:58:34,115 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 03:58:34,116 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 415 transitions. [2020-10-15 03:58:34,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-15 03:58:34,120 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:58:34,120 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:58:34,121 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-15 03:58:34,121 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:58:34,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:58:34,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1245635927, now seen corresponding path program 1 times [2020-10-15 03:58:34,121 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:58:34,122 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2125944509] [2020-10-15 03:58:34,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:58:34,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:58:34,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:58:34,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:58:34,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:58:34,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:58:34,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:58:34,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:58:36,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:58:39,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:58:39,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-15 03:58:39,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-15 03:58:39,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-15 03:58:39,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:58:39,175 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:58:39,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 03:58:39,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-15 03:58:39,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-15 03:58:39,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 11 [2020-10-15 03:58:39,445 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-15 03:58:39,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:58:39,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:58:39,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:58:39,463 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:58:39,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:58:39,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:58:39,464 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-15 03:58:39,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:58:39,465 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:58:39,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:58:39,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:58:39,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:58:39,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:58:39,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:58:39,496 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2125944509] [2020-10-15 03:58:39,497 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:58:39,497 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 03:58:39,497 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290780845] [2020-10-15 03:58:39,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-15 03:58:39,500 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:58:39,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-15 03:58:39,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-15 03:58:39,501 INFO L87 Difference]: Start difference. First operand 278 states and 415 transitions. Second operand 4 states. [2020-10-15 03:58:39,800 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2020-10-15 03:58:40,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:58:40,688 INFO L93 Difference]: Finished difference Result 706 states and 1097 transitions. [2020-10-15 03:58:40,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 03:58:40,689 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 78 [2020-10-15 03:58:40,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:58:40,692 INFO L225 Difference]: With dead ends: 706 [2020-10-15 03:58:40,692 INFO L226 Difference]: Without dead ends: 476 [2020-10-15 03:58:40,695 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-15 03:58:40,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2020-10-15 03:58:40,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 474. [2020-10-15 03:58:40,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 474 states. [2020-10-15 03:58:40,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 727 transitions. [2020-10-15 03:58:40,728 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 727 transitions. Word has length 78 [2020-10-15 03:58:40,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:58:40,729 INFO L479 AbstractCegarLoop]: Abstraction has 474 states and 727 transitions. [2020-10-15 03:58:40,729 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-15 03:58:40,729 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 727 transitions. [2020-10-15 03:58:40,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-15 03:58:40,732 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:58:40,732 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:58:40,732 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-15 03:58:40,733 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:58:40,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:58:40,733 INFO L82 PathProgramCache]: Analyzing trace with hash 2012029566, now seen corresponding path program 1 times [2020-10-15 03:58:40,733 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:58:40,734 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [114164880] [2020-10-15 03:58:40,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:58:40,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:58:40,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:58:40,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:58:40,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:58:41,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:58:41,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:58:42,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:58:44,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:58:44,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-15 03:58:44,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-15 03:58:44,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3566 [2020-10-15 03:58:44,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:58:44,337 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:58:44,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 03:58:44,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-15 03:58:44,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-15 03:58:44,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:58:44,638 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-15 03:58:44,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:58:44,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:58:44,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:58:44,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:58:44,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:58:44,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:58:44,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-15 03:58:44,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:58:44,656 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:58:44,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:58:44,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:58:44,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:58:44,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:58:44,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:58:44,682 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [114164880] [2020-10-15 03:58:44,683 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:58:44,683 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 03:58:44,684 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973880359] [2020-10-15 03:58:44,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-15 03:58:44,685 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:58:44,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-15 03:58:44,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-15 03:58:44,686 INFO L87 Difference]: Start difference. First operand 474 states and 727 transitions. Second operand 4 states. [2020-10-15 03:58:44,928 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2020-10-15 03:58:45,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:58:45,871 INFO L93 Difference]: Finished difference Result 1262 states and 1981 transitions. [2020-10-15 03:58:45,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 03:58:45,872 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 79 [2020-10-15 03:58:45,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:58:45,877 INFO L225 Difference]: With dead ends: 1262 [2020-10-15 03:58:45,878 INFO L226 Difference]: Without dead ends: 836 [2020-10-15 03:58:45,880 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-15 03:58:45,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2020-10-15 03:58:45,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 834. [2020-10-15 03:58:45,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 834 states. [2020-10-15 03:58:45,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 834 states to 834 states and 1297 transitions. [2020-10-15 03:58:45,924 INFO L78 Accepts]: Start accepts. Automaton has 834 states and 1297 transitions. Word has length 79 [2020-10-15 03:58:45,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:58:45,925 INFO L479 AbstractCegarLoop]: Abstraction has 834 states and 1297 transitions. [2020-10-15 03:58:45,925 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-15 03:58:45,925 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states and 1297 transitions. [2020-10-15 03:58:45,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-15 03:58:45,927 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:58:45,927 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:58:45,927 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-15 03:58:45,927 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:58:45,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:58:45,928 INFO L82 PathProgramCache]: Analyzing trace with hash -1373201015, now seen corresponding path program 1 times [2020-10-15 03:58:45,928 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:58:45,928 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1062872633] [2020-10-15 03:58:45,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:58:45,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:58:45,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:58:46,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:58:46,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:58:46,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:58:46,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:58:47,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:58:47,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-15 03:58:47,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-15 03:58:47,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1666 [2020-10-15 03:58:47,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:58:47,624 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:58:47,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 03:58:47,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-15 03:58:47,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-15 03:58:47,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:58:47,857 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-15 03:58:47,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:58:47,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:58:47,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:58:47,875 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:58:47,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:58:47,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:58:47,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-15 03:58:47,876 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:58:47,876 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:58:47,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:58:47,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:58:47,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:58:47,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:58:47,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:58:47,902 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1062872633] [2020-10-15 03:58:47,902 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:58:47,902 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 03:58:47,902 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079776041] [2020-10-15 03:58:47,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-15 03:58:47,903 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:58:47,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-15 03:58:47,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-15 03:58:47,904 INFO L87 Difference]: Start difference. First operand 834 states and 1297 transitions. Second operand 4 states. [2020-10-15 03:58:48,099 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2020-10-15 03:58:48,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:58:48,898 INFO L93 Difference]: Finished difference Result 2278 states and 3587 transitions. [2020-10-15 03:58:48,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 03:58:48,898 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 80 [2020-10-15 03:58:48,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:58:48,907 INFO L225 Difference]: With dead ends: 2278 [2020-10-15 03:58:48,907 INFO L226 Difference]: Without dead ends: 1492 [2020-10-15 03:58:48,909 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 [2020-10-15 03:58:48,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1492 states. [2020-10-15 03:58:48,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1492 to 1490. [2020-10-15 03:58:48,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1490 states. [2020-10-15 03:58:48,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1490 states to 1490 states and 2329 transitions. [2020-10-15 03:58:48,987 INFO L78 Accepts]: Start accepts. Automaton has 1490 states and 2329 transitions. Word has length 80 [2020-10-15 03:58:48,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:58:48,988 INFO L479 AbstractCegarLoop]: Abstraction has 1490 states and 2329 transitions. [2020-10-15 03:58:48,988 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-15 03:58:48,988 INFO L276 IsEmpty]: Start isEmpty. Operand 1490 states and 2329 transitions. [2020-10-15 03:58:48,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-15 03:58:48,989 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:58:48,989 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:58:48,989 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-15 03:58:48,990 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:58:48,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:58:48,990 INFO L82 PathProgramCache]: Analyzing trace with hash -331025546, now seen corresponding path program 1 times [2020-10-15 03:58:48,990 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:58:48,991 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [704228102] [2020-10-15 03:58:48,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:58:49,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:58:49,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:58:49,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:58:49,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:58:49,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:58:50,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:58:50,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-15 03:58:50,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-15 03:58:50,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1033 [2020-10-15 03:58:50,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:58:50,051 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:58:50,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 03:58:50,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-15 03:58:50,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-15 03:58:50,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:58:50,311 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-15 03:58:50,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:58:50,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:58:50,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:58:50,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:58:50,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:58:50,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:58:50,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-15 03:58:50,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:58:50,331 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:58:50,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:58:50,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:58:50,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:58:50,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:58:50,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:58:50,352 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [704228102] [2020-10-15 03:58:50,352 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:58:50,352 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 03:58:50,352 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325993762] [2020-10-15 03:58:50,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-15 03:58:50,353 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:58:50,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-15 03:58:50,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-15 03:58:50,354 INFO L87 Difference]: Start difference. First operand 1490 states and 2329 transitions. Second operand 4 states. [2020-10-15 03:58:50,563 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2020-10-15 03:58:51,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:58:51,631 INFO L93 Difference]: Finished difference Result 4118 states and 6475 transitions. [2020-10-15 03:58:51,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 03:58:51,632 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 81 [2020-10-15 03:58:51,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:58:51,646 INFO L225 Difference]: With dead ends: 4118 [2020-10-15 03:58:51,646 INFO L226 Difference]: Without dead ends: 2676 [2020-10-15 03:58:51,650 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-15 03:58:51,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2676 states. [2020-10-15 03:58:51,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2676 to 2674. [2020-10-15 03:58:51,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2674 states. [2020-10-15 03:58:51,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2674 states to 2674 states and 4177 transitions. [2020-10-15 03:58:51,786 INFO L78 Accepts]: Start accepts. Automaton has 2674 states and 4177 transitions. Word has length 81 [2020-10-15 03:58:51,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:58:51,787 INFO L479 AbstractCegarLoop]: Abstraction has 2674 states and 4177 transitions. [2020-10-15 03:58:51,787 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-15 03:58:51,787 INFO L276 IsEmpty]: Start isEmpty. Operand 2674 states and 4177 transitions. [2020-10-15 03:58:51,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-15 03:58:51,788 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:58:51,788 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:58:51,788 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-15 03:58:51,789 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:58:51,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:58:51,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1109513280, now seen corresponding path program 1 times [2020-10-15 03:58:51,789 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:58:51,790 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2110593007] [2020-10-15 03:58:51,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:58:51,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:58:51,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:58:51,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:58:51,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:58:52,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:58:52,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-15 03:58:52,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 03:58:52,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 527 [2020-10-15 03:58:52,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:58:52,343 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:58:52,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 03:58:52,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-15 03:58:52,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-15 03:58:52,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:58:52,603 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-15 03:58:52,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:58:52,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:58:52,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:58:52,620 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:58:52,620 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:58:52,620 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:58:52,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-15 03:58:52,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:58:52,621 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:58:52,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:58:52,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:58:52,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:58:52,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:58:52,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:58:52,641 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2110593007] [2020-10-15 03:58:52,642 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:58:52,642 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 03:58:52,643 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432377143] [2020-10-15 03:58:52,643 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-15 03:58:52,643 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:58:52,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-15 03:58:52,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-15 03:58:52,644 INFO L87 Difference]: Start difference. First operand 2674 states and 4177 transitions. Second operand 4 states. [2020-10-15 03:58:52,846 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2020-10-15 03:58:53,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:58:53,908 INFO L93 Difference]: Finished difference Result 7414 states and 11603 transitions. [2020-10-15 03:58:53,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 03:58:53,909 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 82 [2020-10-15 03:58:53,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:58:53,935 INFO L225 Difference]: With dead ends: 7414 [2020-10-15 03:58:53,935 INFO L226 Difference]: Without dead ends: 4788 [2020-10-15 03:58:53,943 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-15 03:58:53,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4788 states. [2020-10-15 03:58:54,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4788 to 4786. [2020-10-15 03:58:54,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4786 states. [2020-10-15 03:58:54,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4786 states to 4786 states and 7441 transitions. [2020-10-15 03:58:54,241 INFO L78 Accepts]: Start accepts. Automaton has 4786 states and 7441 transitions. Word has length 82 [2020-10-15 03:58:54,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:58:54,242 INFO L479 AbstractCegarLoop]: Abstraction has 4786 states and 7441 transitions. [2020-10-15 03:58:54,242 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-15 03:58:54,242 INFO L276 IsEmpty]: Start isEmpty. Operand 4786 states and 7441 transitions. [2020-10-15 03:58:54,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-15 03:58:54,243 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:58:54,243 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:58:54,244 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-15 03:58:54,244 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:58:54,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:58:54,244 INFO L82 PathProgramCache]: Analyzing trace with hash -12567434, now seen corresponding path program 1 times [2020-10-15 03:58:54,245 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:58:54,246 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1695004820] [2020-10-15 03:58:54,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:58:54,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:58:54,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:58:54,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:58:54,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:58:54,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-15 03:58:54,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 03:58:54,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 377 [2020-10-15 03:58:54,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:58:54,656 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:58:54,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 03:58:54,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-15 03:58:54,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-15 03:58:54,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:58:54,974 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-15 03:58:54,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:58:54,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:58:54,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:58:55,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:58:55,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:58:55,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:58:55,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-15 03:58:55,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:58:55,006 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:58:55,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:58:55,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:58:55,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:58:55,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:58:55,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:58:55,033 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1695004820] [2020-10-15 03:58:55,033 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:58:55,033 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 03:58:55,033 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196034579] [2020-10-15 03:58:55,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-15 03:58:55,034 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:58:55,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-15 03:58:55,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-15 03:58:55,035 INFO L87 Difference]: Start difference. First operand 4786 states and 7441 transitions. Second operand 4 states. [2020-10-15 03:58:55,342 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2020-10-15 03:58:56,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:58:56,519 INFO L93 Difference]: Finished difference Result 13238 states and 20563 transitions. [2020-10-15 03:58:56,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 03:58:56,520 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 83 [2020-10-15 03:58:56,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:58:56,561 INFO L225 Difference]: With dead ends: 13238 [2020-10-15 03:58:56,561 INFO L226 Difference]: Without dead ends: 8500 [2020-10-15 03:58:56,576 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-15 03:58:56,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8500 states. [2020-10-15 03:58:57,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8500 to 8498. [2020-10-15 03:58:57,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8498 states. [2020-10-15 03:58:57,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8498 states to 8498 states and 13105 transitions. [2020-10-15 03:58:57,119 INFO L78 Accepts]: Start accepts. Automaton has 8498 states and 13105 transitions. Word has length 83 [2020-10-15 03:58:57,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:58:57,120 INFO L479 AbstractCegarLoop]: Abstraction has 8498 states and 13105 transitions. [2020-10-15 03:58:57,120 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-15 03:58:57,120 INFO L276 IsEmpty]: Start isEmpty. Operand 8498 states and 13105 transitions. [2020-10-15 03:58:57,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-15 03:58:57,121 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:58:57,121 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:58:57,121 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-15 03:58:57,121 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:58:57,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:58:57,122 INFO L82 PathProgramCache]: Analyzing trace with hash -1619708598, now seen corresponding path program 1 times [2020-10-15 03:58:57,122 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:58:57,123 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1122631851] [2020-10-15 03:58:57,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:58:57,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:58:57,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:58:57,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:58:57,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:58:57,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-15 03:58:57,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 03:58:57,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 634 [2020-10-15 03:58:57,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:58:57,784 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:58:57,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-15 03:58:57,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-15 03:58:57,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-15 03:58:57,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:58:58,173 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-15 03:58:58,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:58:58,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:58:58,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:58:58,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:58:58,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:58:58,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:58:58,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-15 03:58:58,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:58:58,201 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:58:58,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:58:58,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:58:58,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:58:58,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:58:58,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:58:58,321 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1122631851] [2020-10-15 03:58:58,321 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:58:58,322 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-15 03:58:58,322 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556819347] [2020-10-15 03:58:58,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 03:58:58,323 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:58:58,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 03:58:58,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-15 03:58:58,324 INFO L87 Difference]: Start difference. First operand 8498 states and 13105 transitions. Second operand 9 states. [2020-10-15 03:59:02,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:59:02,796 INFO L93 Difference]: Finished difference Result 51518 states and 78775 transitions. [2020-10-15 03:59:02,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-15 03:59:02,796 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 84 [2020-10-15 03:59:02,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:59:02,941 INFO L225 Difference]: With dead ends: 51518 [2020-10-15 03:59:02,942 INFO L226 Difference]: Without dead ends: 43068 [2020-10-15 03:59:02,966 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-15 03:59:03,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43068 states. [2020-10-15 03:59:05,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43068 to 43058. [2020-10-15 03:59:05,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43058 states. [2020-10-15 03:59:05,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43058 states to 43058 states and 65585 transitions. [2020-10-15 03:59:05,898 INFO L78 Accepts]: Start accepts. Automaton has 43058 states and 65585 transitions. Word has length 84 [2020-10-15 03:59:05,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:59:05,898 INFO L479 AbstractCegarLoop]: Abstraction has 43058 states and 65585 transitions. [2020-10-15 03:59:05,898 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 03:59:05,898 INFO L276 IsEmpty]: Start isEmpty. Operand 43058 states and 65585 transitions. [2020-10-15 03:59:05,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-15 03:59:05,899 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:59:05,899 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:59:05,899 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-15 03:59:05,899 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:59:05,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:59:05,900 INFO L82 PathProgramCache]: Analyzing trace with hash 2034043841, now seen corresponding path program 1 times [2020-10-15 03:59:05,900 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:59:05,900 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [877610162] [2020-10-15 03:59:05,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:59:05,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:59:05,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:59:06,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:59:06,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:59:06,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-15 03:59:06,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 03:59:06,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 570 [2020-10-15 03:59:06,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:59:06,493 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:59:06,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-15 03:59:06,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-15 03:59:06,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-15 03:59:06,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:59:06,800 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-15 03:59:06,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:59:06,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:59:06,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:59:06,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:59:06,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:59:06,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:59:06,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-15 03:59:06,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:59:06,843 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:59:06,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 03:59:06,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:59:06,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-15 03:59:06,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:59:06,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:59:06,879 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [877610162] [2020-10-15 03:59:06,880 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:59:06,880 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-15 03:59:06,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000490058] [2020-10-15 03:59:06,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 03:59:06,881 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:59:06,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 03:59:06,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-15 03:59:06,882 INFO L87 Difference]: Start difference. First operand 43058 states and 65585 transitions. Second operand 6 states. [2020-10-15 03:59:07,122 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-15 03:59:11,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:59:11,493 INFO L93 Difference]: Finished difference Result 128374 states and 195251 transitions. [2020-10-15 03:59:11,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 03:59:11,493 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 86 [2020-10-15 03:59:11,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:59:11,688 INFO L225 Difference]: With dead ends: 128374 [2020-10-15 03:59:11,688 INFO L226 Difference]: Without dead ends: 85364 [2020-10-15 03:59:11,775 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-15 03:59:11,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85364 states. [2020-10-15 03:59:17,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85364 to 85362. [2020-10-15 03:59:17,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85362 states. [2020-10-15 03:59:17,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85362 states to 85362 states and 129009 transitions. [2020-10-15 03:59:17,658 INFO L78 Accepts]: Start accepts. Automaton has 85362 states and 129009 transitions. Word has length 86 [2020-10-15 03:59:17,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:59:17,659 INFO L479 AbstractCegarLoop]: Abstraction has 85362 states and 129009 transitions. [2020-10-15 03:59:17,659 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 03:59:17,659 INFO L276 IsEmpty]: Start isEmpty. Operand 85362 states and 129009 transitions. [2020-10-15 03:59:17,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-15 03:59:17,660 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:59:17,660 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:59:17,661 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-15 03:59:17,661 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:59:17,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:59:17,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1463627260, now seen corresponding path program 1 times [2020-10-15 03:59:17,661 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:59:17,662 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1084089739] [2020-10-15 03:59:17,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:59:17,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:59:17,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:59:17,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:59:17,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-15 03:59:17,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:59:17,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 139 [2020-10-15 03:59:17,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:59:17,827 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:59:17,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-15 03:59:17,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 88 [2020-10-15 03:59:17,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-15 03:59:17,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:59:18,062 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-15 03:59:18,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:59:18,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:59:18,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:59:18,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:59:18,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:59:18,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:59:18,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-15 03:59:18,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:59:18,086 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:59:18,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:59:18,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:59:18,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:59:18,087 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:59:18,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:59:18,108 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1084089739] [2020-10-15 03:59:18,109 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:59:18,109 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-15 03:59:18,109 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180342686] [2020-10-15 03:59:18,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-15 03:59:18,111 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:59:18,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-15 03:59:18,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-15 03:59:18,111 INFO L87 Difference]: Start difference. First operand 85362 states and 129009 transitions. Second operand 5 states. [2020-10-15 03:59:27,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:59:27,609 INFO L93 Difference]: Finished difference Result 173748 states and 261042 transitions. [2020-10-15 03:59:27,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-15 03:59:27,610 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 86 [2020-10-15 03:59:27,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:59:27,918 INFO L225 Difference]: With dead ends: 173748 [2020-10-15 03:59:27,918 INFO L226 Difference]: Without dead ends: 173746 [2020-10-15 03:59:27,969 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-15 03:59:28,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173746 states. [2020-10-15 03:59:35,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173746 to 88434. [2020-10-15 03:59:35,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88434 states. [2020-10-15 03:59:35,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88434 states to 88434 states and 132081 transitions. [2020-10-15 03:59:35,264 INFO L78 Accepts]: Start accepts. Automaton has 88434 states and 132081 transitions. Word has length 86 [2020-10-15 03:59:35,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:59:35,264 INFO L479 AbstractCegarLoop]: Abstraction has 88434 states and 132081 transitions. [2020-10-15 03:59:35,264 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-15 03:59:35,264 INFO L276 IsEmpty]: Start isEmpty. Operand 88434 states and 132081 transitions. [2020-10-15 03:59:35,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-15 03:59:35,266 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:59:35,266 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:59:35,266 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-15 03:59:35,267 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:59:35,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:59:35,267 INFO L82 PathProgramCache]: Analyzing trace with hash -1862575371, now seen corresponding path program 1 times [2020-10-15 03:59:35,267 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:59:35,268 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1495853212] [2020-10-15 03:59:35,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:59:35,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:59:35,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:59:35,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:59:35,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-15 03:59:35,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:59:35,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 115 [2020-10-15 03:59:35,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:59:35,408 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:59:35,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 03:59:35,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 03:59:35,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-15 03:59:35,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:59:35,631 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-15 03:59:35,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:59:35,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:59:35,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:59:35,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:59:35,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:59:35,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:59:35,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-15 03:59:35,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:59:35,647 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:59:35,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:59:35,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:59:35,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:59:35,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:59:35,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:59:35,667 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1495853212] [2020-10-15 03:59:35,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:59:35,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 03:59:35,669 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766597812] [2020-10-15 03:59:35,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-15 03:59:35,669 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:59:35,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-15 03:59:35,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-15 03:59:35,670 INFO L87 Difference]: Start difference. First operand 88434 states and 132081 transitions. Second operand 4 states. [2020-10-15 03:59:35,930 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-15 03:59:42,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:59:42,724 INFO L93 Difference]: Finished difference Result 197720 states and 294917 transitions. [2020-10-15 03:59:42,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 03:59:42,724 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 87 [2020-10-15 03:59:42,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:59:42,886 INFO L225 Difference]: With dead ends: 197720 [2020-10-15 03:59:42,887 INFO L226 Difference]: Without dead ends: 109334 [2020-10-15 03:59:42,993 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-15 03:59:43,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109334 states. [2020-10-15 03:59:51,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109334 to 109332. [2020-10-15 03:59:51,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109332 states. [2020-10-15 03:59:51,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109332 states to 109332 states and 162531 transitions. [2020-10-15 03:59:51,659 INFO L78 Accepts]: Start accepts. Automaton has 109332 states and 162531 transitions. Word has length 87 [2020-10-15 03:59:51,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:59:51,659 INFO L479 AbstractCegarLoop]: Abstraction has 109332 states and 162531 transitions. [2020-10-15 03:59:51,659 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-15 03:59:51,659 INFO L276 IsEmpty]: Start isEmpty. Operand 109332 states and 162531 transitions. [2020-10-15 03:59:51,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-15 03:59:51,704 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:59:51,705 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:59:51,705 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-15 03:59:51,705 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:59:51,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:59:51,706 INFO L82 PathProgramCache]: Analyzing trace with hash -173884417, now seen corresponding path program 1 times [2020-10-15 03:59:51,706 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:59:51,706 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1352858061] [2020-10-15 03:59:51,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:59:51,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:59:51,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:59:51,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:59:51,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:59:53,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:59:53,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-15 03:59:53,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 03:59:53,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2169 [2020-10-15 03:59:53,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:59:53,910 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:59:53,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-15 03:59:53,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 03:59:53,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-15 03:59:53,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:59:54,442 WARN L193 SmtUtils]: Spent 428.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-15 03:59:54,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:59:54,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:59:54,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:59:54,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:59:54,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:59:54,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:59:54,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-15 03:59:54,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:59:54,457 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:59:54,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:59:54,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:59:54,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:59:54,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:59:54,514 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-15 03:59:54,514 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1352858061] [2020-10-15 03:59:54,515 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 03:59:54,515 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-15 03:59:54,515 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300585561] [2020-10-15 03:59:54,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-15 03:59:54,516 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:59:54,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-15 03:59:54,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-15 03:59:54,516 INFO L87 Difference]: Start difference. First operand 109332 states and 162531 transitions. Second operand 5 states. [2020-10-15 03:59:54,754 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 177 [2020-10-15 04:00:07,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 04:00:07,626 INFO L93 Difference]: Finished difference Result 278362 states and 414246 transitions. [2020-10-15 04:00:07,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-15 04:00:07,627 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 116 [2020-10-15 04:00:07,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 04:00:07,886 INFO L225 Difference]: With dead ends: 278362 [2020-10-15 04:00:07,886 INFO L226 Difference]: Without dead ends: 189976 [2020-10-15 04:00:07,978 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-15 04:00:08,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189976 states. [2020-10-15 04:00:18,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189976 to 189972. [2020-10-15 04:00:18,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189972 states. [2020-10-15 04:00:18,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189972 states to 189972 states and 280739 transitions. [2020-10-15 04:00:18,859 INFO L78 Accepts]: Start accepts. Automaton has 189972 states and 280739 transitions. Word has length 116 [2020-10-15 04:00:18,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 04:00:18,859 INFO L479 AbstractCegarLoop]: Abstraction has 189972 states and 280739 transitions. [2020-10-15 04:00:18,859 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-15 04:00:18,859 INFO L276 IsEmpty]: Start isEmpty. Operand 189972 states and 280739 transitions. [2020-10-15 04:00:18,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-15 04:00:18,895 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 04:00:18,895 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 04:00:18,896 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-15 04:00:18,896 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 04:00:18,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 04:00:18,896 INFO L82 PathProgramCache]: Analyzing trace with hash -637264127, now seen corresponding path program 1 times [2020-10-15 04:00:18,897 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 04:00:18,897 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [745556198] [2020-10-15 04:00:18,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 04:00:18,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 04:00:18,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:00:18,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:00:19,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:00:19,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:00:19,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:00:19,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:00:19,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:00:23,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 04:00:23,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-15 04:00:23,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-15 04:00:23,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-15 04:00:23,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 04:00:23,941 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 04:00:23,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-15 04:00:23,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-15 04:00:23,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-15 04:00:23,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 04:00:24,292 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-15 04:00:24,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 04:00:24,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 04:00:24,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:00:24,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 04:00:24,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 04:00:24,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 04:00:24,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-15 04:00:24,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 04:00:24,332 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 04:00:24,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 04:00:24,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 04:00:24,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-15 04:00:24,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 04:00:24,397 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 04:00:24,398 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [745556198] [2020-10-15 04:00:24,398 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 04:00:24,399 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-15 04:00:24,399 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769681431] [2020-10-15 04:00:24,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-15 04:00:24,400 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 04:00:24,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-15 04:00:24,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-15 04:00:24,401 INFO L87 Difference]: Start difference. First operand 189972 states and 280739 transitions. Second operand 8 states. [2020-10-15 04:00:24,721 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-15 04:00:45,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 04:00:45,501 INFO L93 Difference]: Finished difference Result 472476 states and 692663 transitions. [2020-10-15 04:00:45,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 04:00:45,502 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 117 [2020-10-15 04:00:45,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 04:00:46,652 INFO L225 Difference]: With dead ends: 472476 [2020-10-15 04:00:46,652 INFO L226 Difference]: Without dead ends: 282554 [2020-10-15 04:00:46,790 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2020-10-15 04:00:46,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282554 states. [2020-10-15 04:01:04,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282554 to 189300. [2020-10-15 04:01:04,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189300 states. [2020-10-15 04:01:04,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189300 states to 189300 states and 274899 transitions. [2020-10-15 04:01:04,790 INFO L78 Accepts]: Start accepts. Automaton has 189300 states and 274899 transitions. Word has length 117 [2020-10-15 04:01:04,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 04:01:04,790 INFO L479 AbstractCegarLoop]: Abstraction has 189300 states and 274899 transitions. [2020-10-15 04:01:04,791 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-15 04:01:04,791 INFO L276 IsEmpty]: Start isEmpty. Operand 189300 states and 274899 transitions. [2020-10-15 04:01:04,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-15 04:01:04,817 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 04:01:04,817 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 04:01:04,818 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-15 04:01:04,818 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 04:01:04,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 04:01:04,818 INFO L82 PathProgramCache]: Analyzing trace with hash -622169118, now seen corresponding path program 1 times [2020-10-15 04:01:04,818 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 04:01:04,818 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2141949813] [2020-10-15 04:01:04,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 04:01:04,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 04:01:04,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:01:04,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:01:05,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:01:09,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 04:01:09,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-15 04:01:09,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 04:01:09,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-15 04:01:09,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 04:01:09,852 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 04:01:09,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-15 04:01:09,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-15 04:01:09,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 105 [2020-10-15 04:01:09,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 04:01:10,142 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-15 04:01:10,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 04:01:10,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 04:01:10,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 04:01:10,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 04:01:10,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 04:01:10,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 04:01:10,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-15 04:01:10,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 04:01:10,155 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 04:01:10,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 04:01:10,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 04:01:10,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 04:01:10,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 04:01:10,196 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-15 04:01:10,196 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2141949813] [2020-10-15 04:01:10,196 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 04:01:10,196 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-15 04:01:10,197 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867341179] [2020-10-15 04:01:10,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 04:01:10,197 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 04:01:10,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 04:01:10,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-15 04:01:10,198 INFO L87 Difference]: Start difference. First operand 189300 states and 274899 transitions. Second operand 9 states. [2020-10-15 04:01:10,450 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 182