/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/list-ext3-properties/sll_circular_traversal-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 15:46:06,569 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 15:46:06,572 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 15:46:06,614 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 15:46:06,614 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 15:46:06,622 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 15:46:06,625 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 15:46:06,628 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 15:46:06,631 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 15:46:06,634 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 15:46:06,635 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 15:46:06,636 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 15:46:06,636 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 15:46:06,639 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 15:46:06,642 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 15:46:06,643 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 15:46:06,645 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 15:46:06,646 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 15:46:06,648 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 15:46:06,656 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 15:46:06,658 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 15:46:06,659 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 15:46:06,660 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 15:46:06,661 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 15:46:06,673 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 15:46:06,673 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 15:46:06,674 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 15:46:06,680 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 15:46:06,680 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 15:46:06,681 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 15:46:06,681 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 15:46:06,682 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 15:46:06,686 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 15:46:06,686 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 15:46:06,687 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 15:46:06,687 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 15:46:06,690 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 15:46:06,691 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 15:46:06,691 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 15:46:06,692 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 15:46:06,692 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 15:46:06,694 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-12 15:46:06,723 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 15:46:06,724 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 15:46:06,725 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 15:46:06,725 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 15:46:06,725 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 15:46:06,726 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 15:46:06,726 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 15:46:06,726 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 15:46:06,726 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 15:46:06,726 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 15:46:06,727 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 15:46:06,727 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 15:46:06,727 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 15:46:06,727 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 15:46:06,727 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 15:46:06,728 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 15:46:06,728 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 15:46:06,728 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 15:46:06,728 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 15:46:06,728 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 15:46:06,729 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 15:46:06,729 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 15:46:06,729 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 15:46:06,729 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 15:46:06,729 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 15:46:06,730 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 15:46:06,730 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 15:46:06,730 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 15:46:06,730 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 15:46:06,730 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 15:46:07,095 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 15:46:07,112 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 15:46:07,117 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 15:46:07,119 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 15:46:07,119 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 15:46:07,120 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext3-properties/sll_circular_traversal-1.i [2020-10-12 15:46:07,178 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e325c01bd/b96b99d808ba4e1c893816c7af002b01/FLAG1010e240c [2020-10-12 15:46:07,753 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 15:46:07,754 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-ext3-properties/sll_circular_traversal-1.i [2020-10-12 15:46:07,780 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e325c01bd/b96b99d808ba4e1c893816c7af002b01/FLAG1010e240c [2020-10-12 15:46:08,040 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e325c01bd/b96b99d808ba4e1c893816c7af002b01 [2020-10-12 15:46:08,048 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 15:46:08,050 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 15:46:08,053 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 15:46:08,054 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 15:46:08,057 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 15:46:08,058 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 03:46:08" (1/1) ... [2020-10-12 15:46:08,061 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7bb8cc1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:46:08, skipping insertion in model container [2020-10-12 15:46:08,062 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 03:46:08" (1/1) ... [2020-10-12 15:46:08,071 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 15:46:08,135 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 15:46:08,597 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 15:46:08,607 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 15:46:08,648 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 15:46:08,716 INFO L208 MainTranslator]: Completed translation [2020-10-12 15:46:08,717 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:46:08 WrapperNode [2020-10-12 15:46:08,717 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 15:46:08,718 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 15:46:08,718 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 15:46:08,718 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 15:46:08,732 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:46:08" (1/1) ... [2020-10-12 15:46:08,732 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:46:08" (1/1) ... [2020-10-12 15:46:08,749 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:46:08" (1/1) ... [2020-10-12 15:46:08,750 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:46:08" (1/1) ... [2020-10-12 15:46:08,765 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:46:08" (1/1) ... [2020-10-12 15:46:08,771 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:46:08" (1/1) ... [2020-10-12 15:46:08,775 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:46:08" (1/1) ... [2020-10-12 15:46:08,781 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 15:46:08,782 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 15:46:08,782 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 15:46:08,782 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 15:46:08,783 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:46:08" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 15:46:08,842 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 15:46:08,842 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 15:46:08,842 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-12 15:46:08,842 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-12 15:46:08,842 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-10-12 15:46:08,842 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_circular_create [2020-10-12 15:46:08,843 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 15:46:08,843 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 15:46:08,843 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-12 15:46:08,843 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-12 15:46:08,843 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-12 15:46:08,843 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-12 15:46:08,843 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-12 15:46:08,843 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-12 15:46:08,844 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-12 15:46:08,845 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-12 15:46:08,845 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-12 15:46:08,845 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-12 15:46:08,845 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-12 15:46:08,845 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-12 15:46:08,846 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-12 15:46:08,846 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-12 15:46:08,847 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-12 15:46:08,847 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-12 15:46:08,848 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-12 15:46:08,848 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-12 15:46:08,848 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-12 15:46:08,849 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-12 15:46:08,849 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-12 15:46:08,850 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-12 15:46:08,850 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-12 15:46:08,850 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-12 15:46:08,850 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-12 15:46:08,850 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-12 15:46:08,850 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-12 15:46:08,850 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-12 15:46:08,851 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-12 15:46:08,851 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-12 15:46:08,853 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-12 15:46:08,853 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-12 15:46:08,853 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-12 15:46:08,853 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-12 15:46:08,853 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-12 15:46:08,854 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-12 15:46:08,854 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-12 15:46:08,854 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-12 15:46:08,854 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-12 15:46:08,854 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-12 15:46:08,854 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-12 15:46:08,855 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-12 15:46:08,855 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-12 15:46:08,855 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-12 15:46:08,855 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-12 15:46:08,855 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-12 15:46:08,855 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-12 15:46:08,855 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-12 15:46:08,855 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-12 15:46:08,856 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-12 15:46:08,856 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-12 15:46:08,856 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-12 15:46:08,856 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-12 15:46:08,856 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-12 15:46:08,856 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-12 15:46:08,856 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-12 15:46:08,856 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-12 15:46:08,857 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-12 15:46:08,857 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-12 15:46:08,857 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-12 15:46:08,857 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-12 15:46:08,857 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-12 15:46:08,857 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-12 15:46:08,857 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-12 15:46:08,858 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-12 15:46:08,858 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-12 15:46:08,858 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-12 15:46:08,858 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-12 15:46:08,858 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-12 15:46:08,858 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-12 15:46:08,858 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-12 15:46:08,859 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-12 15:46:08,859 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-12 15:46:08,859 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-12 15:46:08,859 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-12 15:46:08,859 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-12 15:46:08,859 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-12 15:46:08,859 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-12 15:46:08,859 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-12 15:46:08,860 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-12 15:46:08,860 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-12 15:46:08,860 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-12 15:46:08,860 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-12 15:46:08,860 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-12 15:46:08,860 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-12 15:46:08,860 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-12 15:46:08,860 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-12 15:46:08,861 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-12 15:46:08,861 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-12 15:46:08,861 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-12 15:46:08,861 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-12 15:46:08,861 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-12 15:46:08,861 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-12 15:46:08,861 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-12 15:46:08,861 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-12 15:46:08,862 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-12 15:46:08,862 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-12 15:46:08,862 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-12 15:46:08,862 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-12 15:46:08,862 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-12 15:46:08,863 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-12 15:46:08,863 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-12 15:46:08,863 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-12 15:46:08,863 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-12 15:46:08,863 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-12 15:46:08,863 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-10-12 15:46:08,863 INFO L130 BoogieDeclarations]: Found specification of procedure sll_circular_create [2020-10-12 15:46:08,863 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-12 15:46:08,863 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-12 15:46:08,863 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-12 15:46:08,864 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 15:46:08,864 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-12 15:46:08,864 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-12 15:46:08,864 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-12 15:46:08,864 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 15:46:08,864 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 15:46:09,268 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-10-12 15:46:09,423 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 15:46:09,423 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-12 15:46:09,427 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 03:46:09 BoogieIcfgContainer [2020-10-12 15:46:09,427 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 15:46:09,429 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 15:46:09,429 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 15:46:09,432 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 15:46:09,433 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 03:46:08" (1/3) ... [2020-10-12 15:46:09,434 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1454a637 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 03:46:09, skipping insertion in model container [2020-10-12 15:46:09,434 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:46:08" (2/3) ... [2020-10-12 15:46:09,435 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1454a637 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 03:46:09, skipping insertion in model container [2020-10-12 15:46:09,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 03:46:09" (3/3) ... [2020-10-12 15:46:09,437 INFO L109 eAbstractionObserver]: Analyzing ICFG sll_circular_traversal-1.i [2020-10-12 15:46:09,448 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 15:46:09,457 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 15:46:09,472 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 15:46:09,498 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 15:46:09,499 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 15:46:09,499 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 15:46:09,500 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 15:46:09,500 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 15:46:09,500 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 15:46:09,500 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 15:46:09,500 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 15:46:09,521 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-10-12 15:46:09,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-12 15:46:09,528 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:46:09,529 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:46:09,530 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:46:09,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:46:09,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1699825484, now seen corresponding path program 1 times [2020-10-12 15:46:09,546 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:46:09,546 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [528788836] [2020-10-12 15:46:09,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:46:09,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:09,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:09,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:10,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:10,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-12 15:46:10,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:46:10,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 500 [2020-10-12 15:46:10,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:10,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 15:46:10,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:46:10,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-12 15:46:10,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-12 15:46:10,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:46:10,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:10,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:10,302 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:10,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:46:10,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:46:10,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 15:46:10,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:10,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:46:10,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:46:10,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:46:10,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:10,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:46:10,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:10,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:10,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:10,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:10,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-12 15:46:10,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:46:10,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 111 [2020-10-12 15:46:10,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:10,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 15:46:10,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:46:10,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 15:46:10,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:46:10,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:46:10,518 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [528788836] [2020-10-12 15:46:10,521 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:46:10,521 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-12 15:46:10,522 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991377347] [2020-10-12 15:46:10,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 15:46:10,529 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:46:10,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 15:46:10,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-12 15:46:10,548 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 10 states. [2020-10-12 15:46:10,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:46:10,857 INFO L93 Difference]: Finished difference Result 67 states and 88 transitions. [2020-10-12 15:46:10,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 15:46:10,860 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2020-10-12 15:46:10,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:46:10,869 INFO L225 Difference]: With dead ends: 67 [2020-10-12 15:46:10,870 INFO L226 Difference]: Without dead ends: 37 [2020-10-12 15:46:10,874 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-10-12 15:46:10,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-12 15:46:10,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2020-10-12 15:46:10,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-12 15:46:10,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2020-10-12 15:46:10,920 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 18 [2020-10-12 15:46:10,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:46:10,920 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2020-10-12 15:46:10,921 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 15:46:10,921 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2020-10-12 15:46:10,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-12 15:46:10,922 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:46:10,922 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:46:10,923 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 15:46:10,923 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:46:10,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:46:10,923 INFO L82 PathProgramCache]: Analyzing trace with hash -1747055625, now seen corresponding path program 1 times [2020-10-12 15:46:10,924 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:46:10,924 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1011910618] [2020-10-12 15:46:10,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:46:10,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:10,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:10,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:11,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:11,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:11,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-12 15:46:11,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:46:11,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 633 [2020-10-12 15:46:11,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:11,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 15:46:11,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:46:11,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 15:46:11,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:11,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:46:11,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:11,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:11,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:11,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:46:11,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:46:11,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-12 15:46:11,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:11,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:46:11,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:46:11,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:46:11,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:11,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:46:11,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:11,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:11,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:11,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-12 15:46:11,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:46:11,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 62 [2020-10-12 15:46:11,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:11,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 15:46:11,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:46:11,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-12 15:46:11,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:11,965 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:46:11,966 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1011910618] [2020-10-12 15:46:11,966 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:46:11,966 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 15:46:11,966 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413995024] [2020-10-12 15:46:11,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 15:46:11,968 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:46:11,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 15:46:11,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-10-12 15:46:11,969 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand 11 states. [2020-10-12 15:46:12,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:46:12,433 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2020-10-12 15:46:12,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 15:46:12,434 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 21 [2020-10-12 15:46:12,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:46:12,436 INFO L225 Difference]: With dead ends: 49 [2020-10-12 15:46:12,436 INFO L226 Difference]: Without dead ends: 47 [2020-10-12 15:46:12,437 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2020-10-12 15:46:12,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-12 15:46:12,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 38. [2020-10-12 15:46:12,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-12 15:46:12,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2020-10-12 15:46:12,446 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 21 [2020-10-12 15:46:12,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:46:12,447 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2020-10-12 15:46:12,447 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 15:46:12,447 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2020-10-12 15:46:12,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-12 15:46:12,448 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:46:12,449 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] [2020-10-12 15:46:12,449 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 15:46:12,449 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:46:12,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:46:12,450 INFO L82 PathProgramCache]: Analyzing trace with hash 344918701, now seen corresponding path program 1 times [2020-10-12 15:46:12,450 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:46:12,450 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1186914090] [2020-10-12 15:46:12,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:46:12,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:12,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:12,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:12,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:12,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-12 15:46:12,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:46:12,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 497 [2020-10-12 15:46:12,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:12,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 15:46:12,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:46:12,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-12 15:46:12,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:46:13,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:46:13,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:13,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:13,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:13,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:46:13,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:46:13,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 15:46:13,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:13,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:46:13,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:46:13,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:46:13,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:46:13,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:46:13,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:13,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:13,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:13,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-12 15:46:13,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:46:13,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 122 [2020-10-12 15:46:13,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:13,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 15:46:13,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:46:13,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-12 15:46:13,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:13,354 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:46:13,354 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1186914090] [2020-10-12 15:46:13,355 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:46:13,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 15:46:13,355 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446093994] [2020-10-12 15:46:13,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 15:46:13,356 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:46:13,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 15:46:13,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-12 15:46:13,357 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand 11 states. [2020-10-12 15:46:13,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:46:13,683 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2020-10-12 15:46:13,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 15:46:13,683 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 21 [2020-10-12 15:46:13,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:46:13,685 INFO L225 Difference]: With dead ends: 44 [2020-10-12 15:46:13,685 INFO L226 Difference]: Without dead ends: 42 [2020-10-12 15:46:13,686 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-10-12 15:46:13,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-12 15:46:13,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 38. [2020-10-12 15:46:13,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-12 15:46:13,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2020-10-12 15:46:13,694 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 21 [2020-10-12 15:46:13,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:46:13,694 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2020-10-12 15:46:13,695 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 15:46:13,695 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2020-10-12 15:46:13,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-12 15:46:13,696 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:46:13,696 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] [2020-10-12 15:46:13,696 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 15:46:13,697 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:46:13,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:46:13,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1674465109, now seen corresponding path program 1 times [2020-10-12 15:46:13,698 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:46:13,698 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [459950900] [2020-10-12 15:46:13,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:46:13,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:13,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:13,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:13,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-12 15:46:13,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:46:13,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 89 [2020-10-12 15:46:13,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:13,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 15:46:13,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:46:13,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-12 15:46:13,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:13,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:46:13,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:13,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:13,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:13,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:46:13,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:46:13,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:46:13,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:13,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:46:13,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:46:13,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:46:13,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:13,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:46:13,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:13,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:13,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:13,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-12 15:46:13,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:46:13,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-12 15:46:13,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:13,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 15:46:13,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-12 15:46:13,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-12 15:46:13,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:13,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:46:13,945 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [459950900] [2020-10-12 15:46:13,945 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:46:13,945 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 15:46:13,946 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899950621] [2020-10-12 15:46:13,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 15:46:13,946 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:46:13,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 15:46:13,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 15:46:13,947 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand 7 states. [2020-10-12 15:46:14,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:46:14,088 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2020-10-12 15:46:14,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 15:46:14,088 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-10-12 15:46:14,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:46:14,089 INFO L225 Difference]: With dead ends: 53 [2020-10-12 15:46:14,089 INFO L226 Difference]: Without dead ends: 33 [2020-10-12 15:46:14,090 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-12 15:46:14,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-12 15:46:14,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2020-10-12 15:46:14,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-12 15:46:14,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-10-12 15:46:14,096 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 22 [2020-10-12 15:46:14,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:46:14,096 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-10-12 15:46:14,096 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 15:46:14,096 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-10-12 15:46:14,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-12 15:46:14,097 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:46:14,097 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:46:14,098 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 15:46:14,098 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:46:14,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:46:14,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1912188010, now seen corresponding path program 1 times [2020-10-12 15:46:14,099 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:46:14,099 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1521443973] [2020-10-12 15:46:14,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:46:14,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:14,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:14,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:14,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:14,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:14,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-12 15:46:14,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:46:14,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 543 [2020-10-12 15:46:14,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:14,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 15:46:14,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:46:14,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 15:46:14,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:46:14,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:46:14,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:14,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:14,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:14,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:46:14,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:46:14,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:46:14,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:14,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:46:14,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:46:14,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:46:14,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:46:14,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:46:14,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:14,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:14,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:14,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-12 15:46:14,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:46:14,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 127 [2020-10-12 15:46:14,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:14,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 15:46:14,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:46:14,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-12 15:46:14,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:15,127 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:46:15,128 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1521443973] [2020-10-12 15:46:15,128 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:46:15,128 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 15:46:15,128 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464984121] [2020-10-12 15:46:15,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 15:46:15,129 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:46:15,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 15:46:15,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-12 15:46:15,130 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 13 states. [2020-10-12 15:46:15,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:46:15,634 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2020-10-12 15:46:15,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 15:46:15,634 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2020-10-12 15:46:15,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:46:15,635 INFO L225 Difference]: With dead ends: 54 [2020-10-12 15:46:15,636 INFO L226 Difference]: Without dead ends: 52 [2020-10-12 15:46:15,636 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-10-12 15:46:15,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-12 15:46:15,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 41. [2020-10-12 15:46:15,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-12 15:46:15,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2020-10-12 15:46:15,643 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 24 [2020-10-12 15:46:15,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:46:15,644 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2020-10-12 15:46:15,644 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 15:46:15,644 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2020-10-12 15:46:15,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-12 15:46:15,645 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:46:15,645 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] [2020-10-12 15:46:15,645 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 15:46:15,645 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:46:15,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:46:15,646 INFO L82 PathProgramCache]: Analyzing trace with hash -853099198, now seen corresponding path program 1 times [2020-10-12 15:46:15,646 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:46:15,646 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1569451100] [2020-10-12 15:46:15,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:46:15,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:15,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:15,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:16,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:16,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-12 15:46:16,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:46:16,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 756 [2020-10-12 15:46:16,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:16,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 15:46:16,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 15:46:16,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 15:46:16,421 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:46:16,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:46:16,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:16,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:16,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:16,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:46:16,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:46:16,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 15:46:16,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:16,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:46:16,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:46:16,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:46:16,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:46:16,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:46:16,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:16,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:16,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:16,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-12 15:46:16,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:46:16,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 145 [2020-10-12 15:46:16,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:16,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 15:46:16,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:46:16,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-12 15:46:16,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:46:16,829 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:46:16,829 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1569451100] [2020-10-12 15:46:16,831 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:46:16,831 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 15:46:16,831 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585575760] [2020-10-12 15:46:16,832 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 15:46:16,832 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:46:16,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 15:46:16,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-12 15:46:16,833 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand 12 states. [2020-10-12 15:46:17,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:46:17,230 INFO L93 Difference]: Finished difference Result 53 states and 60 transitions. [2020-10-12 15:46:17,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 15:46:17,231 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 25 [2020-10-12 15:46:17,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:46:17,232 INFO L225 Difference]: With dead ends: 53 [2020-10-12 15:46:17,232 INFO L226 Difference]: Without dead ends: 45 [2020-10-12 15:46:17,233 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2020-10-12 15:46:17,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-12 15:46:17,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 41. [2020-10-12 15:46:17,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-12 15:46:17,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2020-10-12 15:46:17,243 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 25 [2020-10-12 15:46:17,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:46:17,243 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2020-10-12 15:46:17,243 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 15:46:17,243 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2020-10-12 15:46:17,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-12 15:46:17,245 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:46:17,245 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:46:17,245 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 15:46:17,246 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:46:17,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:46:17,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1842697613, now seen corresponding path program 2 times [2020-10-12 15:46:17,246 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:46:17,247 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2096712019] [2020-10-12 15:46:17,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:46:17,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:17,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:17,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:17,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:18,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:18,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-12 15:46:18,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:46:18,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 861 [2020-10-12 15:46:18,124 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:18,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 15:46:18,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:46:18,124 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 15:46:18,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:18,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:46:18,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:18,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:18,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:18,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:46:18,244 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:46:18,244 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:46:18,245 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:18,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:46:18,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:46:18,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:46:18,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:46:18,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:46:18,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:18,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:18,381 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:18,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-12 15:46:18,382 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:46:18,382 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 103 [2020-10-12 15:46:18,382 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:18,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 15:46:18,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:46:18,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-12 15:46:18,383 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:18,540 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:46:18,540 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2096712019] [2020-10-12 15:46:18,541 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:46:18,541 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 15:46:18,541 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337268403] [2020-10-12 15:46:18,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 15:46:18,542 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:46:18,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 15:46:18,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2020-10-12 15:46:18,543 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand 15 states. [2020-10-12 15:46:19,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:46:19,062 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2020-10-12 15:46:19,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 15:46:19,063 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 27 [2020-10-12 15:46:19,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:46:19,064 INFO L225 Difference]: With dead ends: 57 [2020-10-12 15:46:19,064 INFO L226 Difference]: Without dead ends: 55 [2020-10-12 15:46:19,066 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2020-10-12 15:46:19,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-12 15:46:19,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2020-10-12 15:46:19,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-12 15:46:19,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2020-10-12 15:46:19,071 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 27 [2020-10-12 15:46:19,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:46:19,071 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2020-10-12 15:46:19,072 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 15:46:19,072 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2020-10-12 15:46:19,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-12 15:46:19,073 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:46:19,073 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:46:19,073 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 15:46:19,073 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:46:19,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:46:19,074 INFO L82 PathProgramCache]: Analyzing trace with hash -420588777, now seen corresponding path program 3 times [2020-10-12 15:46:19,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:46:19,074 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1184618016] [2020-10-12 15:46:19,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:46:19,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:19,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:19,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:19,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:19,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:19,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-12 15:46:19,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:46:19,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 712 [2020-10-12 15:46:19,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:19,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 15:46:19,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 15:46:19,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 15:46:19,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:19,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:46:19,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:19,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:19,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:19,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:46:19,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:46:19,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:46:19,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:19,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:46:19,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:46:19,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:46:19,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:46:19,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:46:19,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:19,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:20,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:20,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-12 15:46:20,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:46:20,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 195 [2020-10-12 15:46:20,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:20,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 15:46:20,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:46:20,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 15:46:20,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:46:20,427 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:46:20,427 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1184618016] [2020-10-12 15:46:20,428 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:46:20,428 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 15:46:20,428 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526858931] [2020-10-12 15:46:20,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 15:46:20,429 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:46:20,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 15:46:20,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-12 15:46:20,430 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand 15 states. [2020-10-12 15:46:21,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:46:21,187 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2020-10-12 15:46:21,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 15:46:21,187 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 27 [2020-10-12 15:46:21,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:46:21,188 INFO L225 Difference]: With dead ends: 60 [2020-10-12 15:46:21,188 INFO L226 Difference]: Without dead ends: 58 [2020-10-12 15:46:21,189 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2020-10-12 15:46:21,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-12 15:46:21,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 44. [2020-10-12 15:46:21,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-12 15:46:21,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2020-10-12 15:46:21,196 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 27 [2020-10-12 15:46:21,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:46:21,196 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2020-10-12 15:46:21,197 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 15:46:21,197 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2020-10-12 15:46:21,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-12 15:46:21,198 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:46:21,198 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-12 15:46:21,198 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 15:46:21,198 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:46:21,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:46:21,199 INFO L82 PathProgramCache]: Analyzing trace with hash 1287665791, now seen corresponding path program 1 times [2020-10-12 15:46:21,199 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:46:21,199 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2113120059] [2020-10-12 15:46:21,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:46:21,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:21,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:21,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:21,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:22,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:22,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-12 15:46:22,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:46:22,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1001 [2020-10-12 15:46:22,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:22,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 15:46:22,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:46:22,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 15:46:22,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:22,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:46:22,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:22,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:22,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:22,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:46:22,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:46:22,377 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:46:22,377 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:22,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:46:22,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:46:22,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:46:22,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:22,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:46:22,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:22,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:22,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:22,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-12 15:46:22,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:46:22,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 115 [2020-10-12 15:46:22,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:22,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 15:46:22,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:46:22,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-12 15:46:22,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:46:22,714 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:46:22,714 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2113120059] [2020-10-12 15:46:22,714 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:46:22,715 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 15:46:22,715 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591467652] [2020-10-12 15:46:22,715 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 15:46:22,716 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:46:22,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 15:46:22,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-10-12 15:46:22,716 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand 16 states. [2020-10-12 15:46:23,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:46:23,319 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2020-10-12 15:46:23,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 15:46:23,320 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 28 [2020-10-12 15:46:23,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:46:23,321 INFO L225 Difference]: With dead ends: 58 [2020-10-12 15:46:23,322 INFO L226 Difference]: Without dead ends: 56 [2020-10-12 15:46:23,322 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2020-10-12 15:46:23,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-12 15:46:23,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 50. [2020-10-12 15:46:23,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-12 15:46:23,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2020-10-12 15:46:23,329 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 28 [2020-10-12 15:46:23,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:46:23,330 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2020-10-12 15:46:23,330 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 15:46:23,330 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2020-10-12 15:46:23,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-12 15:46:23,331 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:46:23,331 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-12 15:46:23,331 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 15:46:23,331 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:46:23,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:46:23,332 INFO L82 PathProgramCache]: Analyzing trace with hash -154735563, now seen corresponding path program 2 times [2020-10-12 15:46:23,332 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:46:23,332 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1941928838] [2020-10-12 15:46:23,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:46:23,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:23,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:23,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:23,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:23,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-12 15:46:23,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:46:23,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 559 [2020-10-12 15:46:23,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:23,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 15:46:23,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 15:46:23,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 15:46:23,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:46:23,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:46:23,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:23,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:23,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:23,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:46:23,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:46:23,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:46:23,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:23,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:46:23,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:46:23,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:46:23,990 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:46:24,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:46:24,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:24,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:24,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:24,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-12 15:46:24,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:46:24,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 142 [2020-10-12 15:46:24,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:24,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 15:46:24,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:46:24,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 15:46:24,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:46:24,310 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:46:24,310 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1941928838] [2020-10-12 15:46:24,311 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:46:24,311 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 15:46:24,311 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502274117] [2020-10-12 15:46:24,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 15:46:24,312 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:46:24,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 15:46:24,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-12 15:46:24,313 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand 13 states. [2020-10-12 15:46:24,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:46:24,872 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2020-10-12 15:46:24,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 15:46:24,873 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 28 [2020-10-12 15:46:24,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:46:24,874 INFO L225 Difference]: With dead ends: 60 [2020-10-12 15:46:24,874 INFO L226 Difference]: Without dead ends: 52 [2020-10-12 15:46:24,875 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2020-10-12 15:46:24,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-12 15:46:24,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2020-10-12 15:46:24,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-12 15:46:24,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 56 transitions. [2020-10-12 15:46:24,892 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 56 transitions. Word has length 28 [2020-10-12 15:46:24,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:46:24,894 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 56 transitions. [2020-10-12 15:46:24,894 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 15:46:24,895 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 56 transitions. [2020-10-12 15:46:24,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-12 15:46:24,896 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:46:24,898 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:46:24,899 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 15:46:24,899 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:46:24,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:46:24,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1828517258, now seen corresponding path program 4 times [2020-10-12 15:46:24,900 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:46:24,900 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1035408213] [2020-10-12 15:46:24,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:46:24,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:24,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:24,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:25,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:25,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-12 15:46:25,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:46:25,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 719 [2020-10-12 15:46:25,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:25,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 15:46:25,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 15:46:25,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 15:46:25,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:46:25,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:46:25,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:25,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:25,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:25,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:46:25,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:46:25,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:46:25,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:25,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:46:25,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:46:25,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:46:25,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:25,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:46:25,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:25,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:25,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:25,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-12 15:46:25,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:46:25,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 77 [2020-10-12 15:46:25,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:25,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 15:46:25,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:46:25,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-12 15:46:25,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:26,006 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 15:46:26,006 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1035408213] [2020-10-12 15:46:26,007 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:46:26,007 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 15:46:26,008 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945684037] [2020-10-12 15:46:26,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 15:46:26,010 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:46:26,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 15:46:26,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2020-10-12 15:46:26,011 INFO L87 Difference]: Start difference. First operand 50 states and 56 transitions. Second operand 13 states. [2020-10-12 15:46:26,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:46:26,390 INFO L93 Difference]: Finished difference Result 71 states and 81 transitions. [2020-10-12 15:46:26,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 15:46:26,391 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 30 [2020-10-12 15:46:26,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:46:26,392 INFO L225 Difference]: With dead ends: 71 [2020-10-12 15:46:26,392 INFO L226 Difference]: Without dead ends: 58 [2020-10-12 15:46:26,394 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2020-10-12 15:46:26,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-12 15:46:26,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 53. [2020-10-12 15:46:26,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-12 15:46:26,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 59 transitions. [2020-10-12 15:46:26,411 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 59 transitions. Word has length 30 [2020-10-12 15:46:26,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:46:26,413 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 59 transitions. [2020-10-12 15:46:26,414 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 15:46:26,414 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 59 transitions. [2020-10-12 15:46:26,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-12 15:46:26,415 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:46:26,417 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:46:26,417 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 15:46:26,418 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:46:26,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:46:26,418 INFO L82 PathProgramCache]: Analyzing trace with hash -1339714624, now seen corresponding path program 5 times [2020-10-12 15:46:26,418 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:46:26,419 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [730796526] [2020-10-12 15:46:26,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:46:26,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:26,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:26,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:26,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:26,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:28,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:28,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-12 15:46:28,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 15:46:28,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1595 [2020-10-12 15:46:28,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:28,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 15:46:28,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 15:46:28,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 15:46:28,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:28,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:46:28,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:28,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:28,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:28,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:46:28,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:46:28,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:46:28,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:28,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:46:28,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:46:28,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:46:28,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:28,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:46:28,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:28,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:28,413 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:28,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-12 15:46:28,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:46:28,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 184 [2020-10-12 15:46:28,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:28,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 15:46:28,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:46:28,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 15:46:28,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:28,899 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:46:28,900 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [730796526] [2020-10-12 15:46:28,900 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:46:28,900 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 15:46:28,900 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522201451] [2020-10-12 15:46:28,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 15:46:28,901 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:46:28,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 15:46:28,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2020-10-12 15:46:28,902 INFO L87 Difference]: Start difference. First operand 53 states and 59 transitions. Second operand 17 states. [2020-10-12 15:46:29,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:46:29,837 INFO L93 Difference]: Finished difference Result 79 states and 87 transitions. [2020-10-12 15:46:29,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 15:46:29,838 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 30 [2020-10-12 15:46:29,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:46:29,839 INFO L225 Difference]: With dead ends: 79 [2020-10-12 15:46:29,839 INFO L226 Difference]: Without dead ends: 77 [2020-10-12 15:46:29,840 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-10-12 15:46:29,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-12 15:46:29,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 66. [2020-10-12 15:46:29,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-12 15:46:29,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 74 transitions. [2020-10-12 15:46:29,852 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 74 transitions. Word has length 30 [2020-10-12 15:46:29,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:46:29,853 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 74 transitions. [2020-10-12 15:46:29,853 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 15:46:29,853 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 74 transitions. [2020-10-12 15:46:29,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-12 15:46:29,854 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:46:29,854 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-12 15:46:29,854 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 15:46:29,854 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:46:29,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:46:29,855 INFO L82 PathProgramCache]: Analyzing trace with hash 1417134252, now seen corresponding path program 2 times [2020-10-12 15:46:29,855 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:46:29,855 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1552404728] [2020-10-12 15:46:29,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:46:29,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:29,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:29,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:30,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:30,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-12 15:46:30,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:46:30,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 785 [2020-10-12 15:46:30,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:30,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 15:46:30,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 15:46:30,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-12 15:46:30,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:46:30,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:46:30,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:30,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:30,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:30,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:46:30,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:46:30,721 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:46:30,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:30,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:46:30,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:46:30,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:46:30,722 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:30,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:46:30,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:30,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:30,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:30,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-12 15:46:30,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:46:30,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 136 [2020-10-12 15:46:30,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:30,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 15:46:30,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:46:30,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 15:46:30,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:31,046 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:46:31,047 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1552404728] [2020-10-12 15:46:31,047 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:46:31,047 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 15:46:31,047 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772099705] [2020-10-12 15:46:31,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 15:46:31,048 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:46:31,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 15:46:31,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2020-10-12 15:46:31,048 INFO L87 Difference]: Start difference. First operand 66 states and 74 transitions. Second operand 15 states. [2020-10-12 15:46:31,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:46:31,497 INFO L93 Difference]: Finished difference Result 81 states and 91 transitions. [2020-10-12 15:46:31,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 15:46:31,499 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 31 [2020-10-12 15:46:31,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:46:31,500 INFO L225 Difference]: With dead ends: 81 [2020-10-12 15:46:31,501 INFO L226 Difference]: Without dead ends: 70 [2020-10-12 15:46:31,501 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2020-10-12 15:46:31,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-12 15:46:31,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 63. [2020-10-12 15:46:31,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-12 15:46:31,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 70 transitions. [2020-10-12 15:46:31,508 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 70 transitions. Word has length 31 [2020-10-12 15:46:31,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:46:31,509 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 70 transitions. [2020-10-12 15:46:31,509 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 15:46:31,509 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 70 transitions. [2020-10-12 15:46:31,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-12 15:46:31,510 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:46:31,510 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-12 15:46:31,510 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 15:46:31,510 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:46:31,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:46:31,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1771574816, now seen corresponding path program 1 times [2020-10-12 15:46:31,511 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:46:31,511 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1571883025] [2020-10-12 15:46:31,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:46:31,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:31,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:31,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:31,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:31,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:32,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:32,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:34,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:34,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-12 15:46:34,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 15:46:34,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2718 [2020-10-12 15:46:34,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:34,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 15:46:34,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:46:34,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 15:46:34,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:34,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:46:34,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:34,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:34,453 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:34,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:46:34,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:46:34,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:46:34,454 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:34,454 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:46:34,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:46:34,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:46:34,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:34,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:46:34,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:34,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:34,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:34,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-12 15:46:34,568 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:46:34,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 82 [2020-10-12 15:46:34,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:34,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 15:46:34,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:46:34,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-12 15:46:34,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:34,869 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:46:34,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1571883025] [2020-10-12 15:46:34,869 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:46:34,869 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 15:46:34,870 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601133962] [2020-10-12 15:46:34,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 15:46:34,870 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:46:34,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 15:46:34,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2020-10-12 15:46:34,871 INFO L87 Difference]: Start difference. First operand 63 states and 70 transitions. Second operand 18 states. [2020-10-12 15:46:35,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:46:35,641 INFO L93 Difference]: Finished difference Result 72 states and 80 transitions. [2020-10-12 15:46:35,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 15:46:35,642 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 33 [2020-10-12 15:46:35,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:46:35,643 INFO L225 Difference]: With dead ends: 72 [2020-10-12 15:46:35,643 INFO L226 Difference]: Without dead ends: 70 [2020-10-12 15:46:35,645 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2020-10-12 15:46:35,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-12 15:46:35,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 68. [2020-10-12 15:46:35,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-12 15:46:35,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 75 transitions. [2020-10-12 15:46:35,651 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 75 transitions. Word has length 33 [2020-10-12 15:46:35,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:46:35,652 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 75 transitions. [2020-10-12 15:46:35,652 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 15:46:35,652 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 75 transitions. [2020-10-12 15:46:35,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-12 15:46:35,652 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:46:35,653 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:46:35,653 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 15:46:35,653 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:46:35,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:46:35,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1693656695, now seen corresponding path program 6 times [2020-10-12 15:46:35,654 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:46:35,654 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [490763984] [2020-10-12 15:46:35,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:46:35,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:35,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:35,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:36,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:36,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:36,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-12 15:46:36,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:46:36,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 907 [2020-10-12 15:46:36,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:36,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 15:46:36,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:46:36,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-12 15:46:36,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:36,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:46:36,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:36,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:36,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:36,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:46:36,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:46:36,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:46:36,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:36,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:46:36,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:46:36,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:46:36,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:36,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:46:36,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:36,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:36,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:36,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-12 15:46:36,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:46:36,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 155 [2020-10-12 15:46:36,979 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:36,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 15:46:36,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:46:36,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-12 15:46:36,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:37,386 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:46:37,386 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [490763984] [2020-10-12 15:46:37,387 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:46:37,387 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 15:46:37,387 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895944521] [2020-10-12 15:46:37,387 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 15:46:37,387 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:46:37,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 15:46:37,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2020-10-12 15:46:37,388 INFO L87 Difference]: Start difference. First operand 68 states and 75 transitions. Second operand 18 states. [2020-10-12 15:46:38,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:46:38,336 INFO L93 Difference]: Finished difference Result 87 states and 95 transitions. [2020-10-12 15:46:38,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 15:46:38,337 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 33 [2020-10-12 15:46:38,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:46:38,338 INFO L225 Difference]: With dead ends: 87 [2020-10-12 15:46:38,338 INFO L226 Difference]: Without dead ends: 85 [2020-10-12 15:46:38,339 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2020-10-12 15:46:38,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-12 15:46:38,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 74. [2020-10-12 15:46:38,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-12 15:46:38,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 82 transitions. [2020-10-12 15:46:38,355 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 82 transitions. Word has length 33 [2020-10-12 15:46:38,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:46:38,356 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 82 transitions. [2020-10-12 15:46:38,356 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 15:46:38,356 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 82 transitions. [2020-10-12 15:46:38,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-12 15:46:38,357 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:46:38,357 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:46:38,358 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 15:46:38,358 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:46:38,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:46:38,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1474575187, now seen corresponding path program 7 times [2020-10-12 15:46:38,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:46:38,359 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1635319873] [2020-10-12 15:46:38,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:46:38,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:38,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:38,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:38,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:39,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:39,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:39,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-12 15:46:39,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 15:46:39,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1371 [2020-10-12 15:46:39,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:39,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 15:46:39,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:46:39,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 15:46:39,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:39,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:46:39,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:39,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:39,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:39,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:46:39,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:46:39,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:46:39,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:39,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:46:39,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:46:39,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:46:39,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:39,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:46:39,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:39,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:40,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:40,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-12 15:46:40,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:46:40,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 224 [2020-10-12 15:46:40,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:40,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 15:46:40,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:46:40,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 15:46:40,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:40,817 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:46:40,818 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1635319873] [2020-10-12 15:46:40,821 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:46:40,821 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 15:46:40,821 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095250225] [2020-10-12 15:46:40,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 15:46:40,822 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:46:40,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 15:46:40,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2020-10-12 15:46:40,823 INFO L87 Difference]: Start difference. First operand 74 states and 82 transitions. Second operand 17 states. [2020-10-12 15:46:41,524 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 64 [2020-10-12 15:46:41,730 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 68 [2020-10-12 15:46:41,936 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 84 [2020-10-12 15:46:42,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:46:42,238 INFO L93 Difference]: Finished difference Result 90 states and 99 transitions. [2020-10-12 15:46:42,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 15:46:42,239 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 33 [2020-10-12 15:46:42,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:46:42,240 INFO L225 Difference]: With dead ends: 90 [2020-10-12 15:46:42,240 INFO L226 Difference]: Without dead ends: 88 [2020-10-12 15:46:42,241 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2020-10-12 15:46:42,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-12 15:46:42,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 71. [2020-10-12 15:46:42,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-12 15:46:42,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 79 transitions. [2020-10-12 15:46:42,250 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 79 transitions. Word has length 33 [2020-10-12 15:46:42,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:46:42,250 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 79 transitions. [2020-10-12 15:46:42,250 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 15:46:42,250 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 79 transitions. [2020-10-12 15:46:42,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-12 15:46:42,251 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:46:42,251 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:46:42,251 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 15:46:42,252 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:46:42,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:46:42,252 INFO L82 PathProgramCache]: Analyzing trace with hash 962364629, now seen corresponding path program 3 times [2020-10-12 15:46:42,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:46:42,252 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [330786955] [2020-10-12 15:46:42,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:46:42,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:42,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:42,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:42,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:42,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:43,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:43,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:43,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:43,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-12 15:46:43,985 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 15:46:43,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1720 [2020-10-12 15:46:43,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:43,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 15:46:43,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:46:43,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 15:46:43,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:44,248 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 33 [2020-10-12 15:46:44,687 WARN L193 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 42 [2020-10-12 15:46:44,871 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 69 [2020-10-12 15:46:45,065 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 67 [2020-10-12 15:46:45,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:46:45,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:45,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:45,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:45,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:46:45,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:46:45,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:46:45,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:45,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:46:45,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:46:45,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:46:45,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:45,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:46:45,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:45,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:45,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:45,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-12 15:46:45,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:46:45,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 92 [2020-10-12 15:46:45,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:45,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 15:46:45,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:46:45,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 15:46:45,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:46,181 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:46:46,181 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [330786955] [2020-10-12 15:46:46,181 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:46:46,181 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 15:46:46,182 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861288213] [2020-10-12 15:46:46,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 15:46:46,182 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:46:46,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 15:46:46,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2020-10-12 15:46:46,183 INFO L87 Difference]: Start difference. First operand 71 states and 79 transitions. Second operand 21 states. [2020-10-12 15:46:47,318 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-12 15:46:47,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:46:47,755 INFO L93 Difference]: Finished difference Result 88 states and 97 transitions. [2020-10-12 15:46:47,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 15:46:47,755 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 34 [2020-10-12 15:46:47,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:46:47,756 INFO L225 Difference]: With dead ends: 88 [2020-10-12 15:46:47,757 INFO L226 Difference]: Without dead ends: 86 [2020-10-12 15:46:47,758 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=71, Invalid=685, Unknown=0, NotChecked=0, Total=756 [2020-10-12 15:46:47,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-12 15:46:47,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 80. [2020-10-12 15:46:47,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-12 15:46:47,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 89 transitions. [2020-10-12 15:46:47,767 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 89 transitions. Word has length 34 [2020-10-12 15:46:47,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:46:47,768 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 89 transitions. [2020-10-12 15:46:47,768 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 15:46:47,768 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 89 transitions. [2020-10-12 15:46:47,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-12 15:46:47,768 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:46:47,769 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:46:47,769 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 15:46:47,769 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:46:47,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:46:47,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1531424095, now seen corresponding path program 4 times [2020-10-12 15:46:47,770 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:46:47,770 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1971442539] [2020-10-12 15:46:47,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:46:47,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:47,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:47,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:48,525 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:48,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-12 15:46:48,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:46:48,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 744 [2020-10-12 15:46:48,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:48,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 15:46:48,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 15:46:48,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 15:46:48,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:48,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:46:48,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:48,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:48,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:48,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:46:48,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:46:48,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:46:48,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:48,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:46:48,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:46:48,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:46:48,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:48,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:46:48,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:48,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:48,724 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:48,724 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-12 15:46:48,724 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:46:48,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 110 [2020-10-12 15:46:48,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:48,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 15:46:48,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:46:48,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 15:46:48,725 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:49,012 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:46:49,013 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1971442539] [2020-10-12 15:46:49,013 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:46:49,013 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 15:46:49,013 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851179178] [2020-10-12 15:46:49,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 15:46:49,014 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:46:49,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 15:46:49,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2020-10-12 15:46:49,015 INFO L87 Difference]: Start difference. First operand 80 states and 89 transitions. Second operand 16 states. [2020-10-12 15:46:49,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:46:49,781 INFO L93 Difference]: Finished difference Result 93 states and 104 transitions. [2020-10-12 15:46:49,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 15:46:49,782 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 34 [2020-10-12 15:46:49,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:46:49,783 INFO L225 Difference]: With dead ends: 93 [2020-10-12 15:46:49,783 INFO L226 Difference]: Without dead ends: 82 [2020-10-12 15:46:49,784 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2020-10-12 15:46:49,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-12 15:46:49,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 80. [2020-10-12 15:46:49,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-12 15:46:49,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 88 transitions. [2020-10-12 15:46:49,793 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 88 transitions. Word has length 34 [2020-10-12 15:46:49,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:46:49,793 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 88 transitions. [2020-10-12 15:46:49,793 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 15:46:49,793 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 88 transitions. [2020-10-12 15:46:49,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-12 15:46:49,794 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:46:49,794 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:46:49,794 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 15:46:49,794 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:46:49,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:46:49,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1548254112, now seen corresponding path program 8 times [2020-10-12 15:46:49,795 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:46:49,795 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [829033356] [2020-10-12 15:46:49,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:46:49,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:49,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:49,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:50,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:50,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-12 15:46:50,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:46:50,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 541 [2020-10-12 15:46:50,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:50,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 15:46:50,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 15:46:50,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 15:46:50,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:50,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:46:50,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:50,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:50,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:50,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:46:50,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:46:50,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:46:50,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:50,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:46:50,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:46:50,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:46:50,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:50,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:46:50,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:50,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:50,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:50,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-12 15:46:50,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:46:50,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 145 [2020-10-12 15:46:50,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:50,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 15:46:50,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:46:50,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 15:46:50,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:51,259 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 15:46:51,260 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [829033356] [2020-10-12 15:46:51,260 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:46:51,260 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 15:46:51,260 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355810569] [2020-10-12 15:46:51,261 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 15:46:51,261 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:46:51,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 15:46:51,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2020-10-12 15:46:51,261 INFO L87 Difference]: Start difference. First operand 80 states and 88 transitions. Second operand 16 states. [2020-10-12 15:46:51,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:46:51,961 INFO L93 Difference]: Finished difference Result 101 states and 112 transitions. [2020-10-12 15:46:51,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 15:46:51,961 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 36 [2020-10-12 15:46:51,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:46:51,962 INFO L225 Difference]: With dead ends: 101 [2020-10-12 15:46:51,962 INFO L226 Difference]: Without dead ends: 85 [2020-10-12 15:46:51,963 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2020-10-12 15:46:51,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-12 15:46:51,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 80. [2020-10-12 15:46:51,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-12 15:46:51,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 87 transitions. [2020-10-12 15:46:51,980 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 87 transitions. Word has length 36 [2020-10-12 15:46:51,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:46:51,981 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 87 transitions. [2020-10-12 15:46:51,982 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 15:46:51,982 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 87 transitions. [2020-10-12 15:46:51,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-12 15:46:51,983 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:46:51,983 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:46:51,983 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-12 15:46:51,983 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:46:51,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:46:51,983 INFO L82 PathProgramCache]: Analyzing trace with hash -142953878, now seen corresponding path program 9 times [2020-10-12 15:46:51,984 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:46:51,984 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1484855559] [2020-10-12 15:46:51,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:46:51,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:52,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:52,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:52,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:52,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:54,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:54,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:54,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-12 15:46:54,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 15:46:54,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2516 [2020-10-12 15:46:54,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:54,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 15:46:54,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 15:46:54,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 15:46:54,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:54,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:46:54,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:54,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:54,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:54,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:46:54,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:46:54,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:46:54,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:54,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:46:54,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:46:54,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:46:54,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:54,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:46:54,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:54,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:55,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:55,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-12 15:46:55,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:46:55,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 206 [2020-10-12 15:46:55,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:55,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 15:46:55,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:46:55,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 15:46:55,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:55,878 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:46:55,878 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1484855559] [2020-10-12 15:46:55,878 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:46:55,878 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-12 15:46:55,878 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835973458] [2020-10-12 15:46:55,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 15:46:55,879 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:46:55,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 15:46:55,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2020-10-12 15:46:55,880 INFO L87 Difference]: Start difference. First operand 80 states and 87 transitions. Second operand 20 states. [2020-10-12 15:46:56,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:46:56,905 INFO L93 Difference]: Finished difference Result 109 states and 118 transitions. [2020-10-12 15:46:56,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 15:46:56,906 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 36 [2020-10-12 15:46:56,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:46:56,907 INFO L225 Difference]: With dead ends: 109 [2020-10-12 15:46:56,907 INFO L226 Difference]: Without dead ends: 107 [2020-10-12 15:46:56,907 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2020-10-12 15:46:56,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-12 15:46:56,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 96. [2020-10-12 15:46:56,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-12 15:46:56,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 105 transitions. [2020-10-12 15:46:56,918 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 105 transitions. Word has length 36 [2020-10-12 15:46:56,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:46:56,919 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 105 transitions. [2020-10-12 15:46:56,919 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 15:46:56,919 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 105 transitions. [2020-10-12 15:46:56,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-12 15:46:56,919 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:46:56,920 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:46:56,920 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-12 15:46:56,920 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:46:56,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:46:56,920 INFO L82 PathProgramCache]: Analyzing trace with hash -137988286, now seen corresponding path program 5 times [2020-10-12 15:46:56,920 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:46:56,921 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1071750876] [2020-10-12 15:46:56,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:46:56,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:56,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:56,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:58,301 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:58,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-12 15:46:58,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:46:58,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1367 [2020-10-12 15:46:58,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:58,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 15:46:58,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 15:46:58,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 15:46:58,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:58,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:46:58,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:58,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:58,459 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:58,459 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:46:58,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:46:58,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:46:58,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:58,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:46:58,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:46:58,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:46:58,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:58,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:46:58,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:46:58,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:46:58,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:46:58,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-12 15:46:58,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:46:58,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 197 [2020-10-12 15:46:58,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:46:58,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 15:46:58,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:46:58,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 15:46:58,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:46:59,167 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 33 [2020-10-12 15:46:59,333 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 35 [2020-10-12 15:46:59,438 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:46:59,439 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1071750876] [2020-10-12 15:46:59,439 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:46:59,439 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 15:46:59,439 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765915185] [2020-10-12 15:46:59,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 15:46:59,440 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:46:59,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 15:46:59,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2020-10-12 15:46:59,441 INFO L87 Difference]: Start difference. First operand 96 states and 105 transitions. Second operand 18 states. [2020-10-12 15:47:00,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:47:00,449 INFO L93 Difference]: Finished difference Result 111 states and 122 transitions. [2020-10-12 15:47:00,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 15:47:00,450 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 37 [2020-10-12 15:47:00,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:47:00,451 INFO L225 Difference]: With dead ends: 111 [2020-10-12 15:47:00,451 INFO L226 Difference]: Without dead ends: 100 [2020-10-12 15:47:00,453 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2020-10-12 15:47:00,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-12 15:47:00,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 90. [2020-10-12 15:47:00,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-12 15:47:00,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 98 transitions. [2020-10-12 15:47:00,460 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 98 transitions. Word has length 37 [2020-10-12 15:47:00,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:47:00,461 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 98 transitions. [2020-10-12 15:47:00,461 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 15:47:00,461 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 98 transitions. [2020-10-12 15:47:00,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-12 15:47:00,462 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:47:00,462 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-10-12 15:47:00,462 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-12 15:47:00,462 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:47:00,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:47:00,463 INFO L82 PathProgramCache]: Analyzing trace with hash -378215455, now seen corresponding path program 1 times [2020-10-12 15:47:00,463 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:47:00,463 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [998298593] [2020-10-12 15:47:00,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:47:00,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:47:00,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:00,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:00,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:00,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:00,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:01,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:02,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:47:02,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-12 15:47:02,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 15:47:02,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1627 [2020-10-12 15:47:02,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:47:02,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 15:47:02,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:47:02,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-12 15:47:02,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:47:02,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:47:02,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:47:02,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:02,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:47:02,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:47:02,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:47:02,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:47:02,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:47:02,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:47:02,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:47:02,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:47:02,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:47:02,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:47:02,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:47:02,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:02,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:02,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:47:02,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-12 15:47:02,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:47:02,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 109 [2020-10-12 15:47:02,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:47:02,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 15:47:02,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:47:02,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-12 15:47:02,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:47:02,578 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:47:02,578 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [998298593] [2020-10-12 15:47:02,578 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:47:02,578 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 15:47:02,579 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788201389] [2020-10-12 15:47:02,579 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 15:47:02,579 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:47:02,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 15:47:02,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2020-10-12 15:47:02,580 INFO L87 Difference]: Start difference. First operand 90 states and 98 transitions. Second operand 18 states. [2020-10-12 15:47:03,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:47:03,302 INFO L93 Difference]: Finished difference Result 97 states and 106 transitions. [2020-10-12 15:47:03,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 15:47:03,303 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 38 [2020-10-12 15:47:03,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:47:03,304 INFO L225 Difference]: With dead ends: 97 [2020-10-12 15:47:03,304 INFO L226 Difference]: Without dead ends: 72 [2020-10-12 15:47:03,305 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2020-10-12 15:47:03,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-12 15:47:03,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-10-12 15:47:03,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-12 15:47:03,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 79 transitions. [2020-10-12 15:47:03,312 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 79 transitions. Word has length 38 [2020-10-12 15:47:03,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:47:03,312 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 79 transitions. [2020-10-12 15:47:03,313 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 15:47:03,313 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 79 transitions. [2020-10-12 15:47:03,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-12 15:47:03,313 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:47:03,313 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-10-12 15:47:03,313 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-12 15:47:03,313 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:47:03,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:47:03,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1099698058, now seen corresponding path program 2 times [2020-10-12 15:47:03,314 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:47:03,314 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [746025695] [2020-10-12 15:47:03,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:47:03,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:47:03,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:03,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:03,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:03,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:05,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:06,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:06,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:47:06,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-12 15:47:06,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 15:47:06,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3434 [2020-10-12 15:47:06,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:47:06,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 15:47:06,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:47:06,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-12 15:47:06,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:47:07,009 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 33 [2020-10-12 15:47:07,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:47:07,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:47:07,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:07,203 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:47:07,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:47:07,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:47:07,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:47:07,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:47:07,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:47:07,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:47:07,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:47:07,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:47:07,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:47:07,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:47:07,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:07,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:47:07,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-12 15:47:07,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:47:07,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 114 [2020-10-12 15:47:07,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:47:07,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 15:47:07,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:47:07,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 15:47:07,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:47:08,026 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:47:08,026 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [746025695] [2020-10-12 15:47:08,027 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:47:08,027 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 15:47:08,027 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777974605] [2020-10-12 15:47:08,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 15:47:08,028 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:47:08,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 15:47:08,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=380, Unknown=0, NotChecked=0, Total=420 [2020-10-12 15:47:08,028 INFO L87 Difference]: Start difference. First operand 72 states and 79 transitions. Second operand 21 states. [2020-10-12 15:47:09,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:47:09,124 INFO L93 Difference]: Finished difference Result 81 states and 89 transitions. [2020-10-12 15:47:09,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 15:47:09,125 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 39 [2020-10-12 15:47:09,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:47:09,126 INFO L225 Difference]: With dead ends: 81 [2020-10-12 15:47:09,126 INFO L226 Difference]: Without dead ends: 79 [2020-10-12 15:47:09,127 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=71, Invalid=685, Unknown=0, NotChecked=0, Total=756 [2020-10-12 15:47:09,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-12 15:47:09,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2020-10-12 15:47:09,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-12 15:47:09,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 84 transitions. [2020-10-12 15:47:09,135 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 84 transitions. Word has length 39 [2020-10-12 15:47:09,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:47:09,135 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 84 transitions. [2020-10-12 15:47:09,135 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 15:47:09,135 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 84 transitions. [2020-10-12 15:47:09,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-12 15:47:09,136 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:47:09,136 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:47:09,136 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-12 15:47:09,136 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:47:09,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:47:09,136 INFO L82 PathProgramCache]: Analyzing trace with hash 1869516685, now seen corresponding path program 10 times [2020-10-12 15:47:09,137 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:47:09,137 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [221510619] [2020-10-12 15:47:09,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:47:09,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:47:09,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:09,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:10,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:11,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:47:11,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-12 15:47:11,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:47:11,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2026 [2020-10-12 15:47:11,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:47:11,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 15:47:11,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:47:11,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-12 15:47:11,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:47:11,377 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 35 [2020-10-12 15:47:11,513 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 37 [2020-10-12 15:47:11,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:47:11,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:47:11,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:11,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:47:11,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:47:11,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:47:11,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:47:11,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:47:11,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:47:11,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:47:11,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:47:11,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:47:11,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:47:11,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:47:11,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:12,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:47:12,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-12 15:47:12,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:47:12,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 211 [2020-10-12 15:47:12,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:47:12,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 15:47:12,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:47:12,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 15:47:12,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:47:12,753 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:47:12,753 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [221510619] [2020-10-12 15:47:12,753 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:47:12,754 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 15:47:12,754 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133587116] [2020-10-12 15:47:12,754 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 15:47:12,754 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:47:12,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 15:47:12,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2020-10-12 15:47:12,755 INFO L87 Difference]: Start difference. First operand 77 states and 84 transitions. Second operand 21 states. [2020-10-12 15:47:13,367 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 70 [2020-10-12 15:47:13,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:47:13,937 INFO L93 Difference]: Finished difference Result 99 states and 107 transitions. [2020-10-12 15:47:13,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-12 15:47:13,938 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 39 [2020-10-12 15:47:13,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:47:13,939 INFO L225 Difference]: With dead ends: 99 [2020-10-12 15:47:13,939 INFO L226 Difference]: Without dead ends: 97 [2020-10-12 15:47:13,940 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=95, Invalid=835, Unknown=0, NotChecked=0, Total=930 [2020-10-12 15:47:13,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-12 15:47:13,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 86. [2020-10-12 15:47:13,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-12 15:47:13,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 94 transitions. [2020-10-12 15:47:13,949 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 94 transitions. Word has length 39 [2020-10-12 15:47:13,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:47:13,950 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 94 transitions. [2020-10-12 15:47:13,950 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 15:47:13,950 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 94 transitions. [2020-10-12 15:47:13,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-12 15:47:13,950 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:47:13,951 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:47:13,951 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-12 15:47:13,951 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:47:13,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:47:13,951 INFO L82 PathProgramCache]: Analyzing trace with hash -1020150377, now seen corresponding path program 11 times [2020-10-12 15:47:13,952 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:47:13,952 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1115283737] [2020-10-12 15:47:13,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:47:13,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:47:13,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:14,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:14,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:14,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:15,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:47:15,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-12 15:47:15,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 15:47:15,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1843 [2020-10-12 15:47:15,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:47:15,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 15:47:15,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 15:47:15,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 15:47:15,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:47:16,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:47:16,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:47:16,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:16,037 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:47:16,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:47:16,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:47:16,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:47:16,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:47:16,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:47:16,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:47:16,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:47:16,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:47:16,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:47:16,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:47:16,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:16,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:47:16,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-12 15:47:16,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:47:16,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 295 [2020-10-12 15:47:16,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:47:16,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 15:47:16,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:47:16,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-12 15:47:16,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:47:16,948 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 54 [2020-10-12 15:47:17,159 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2020-10-12 15:47:17,413 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 51 [2020-10-12 15:47:17,666 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 53 [2020-10-12 15:47:17,822 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:47:17,823 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1115283737] [2020-10-12 15:47:17,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:47:17,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 15:47:17,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424471663] [2020-10-12 15:47:17,823 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 15:47:17,824 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:47:17,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 15:47:17,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=375, Unknown=0, NotChecked=0, Total=420 [2020-10-12 15:47:17,824 INFO L87 Difference]: Start difference. First operand 86 states and 94 transitions. Second operand 21 states. [2020-10-12 15:47:18,658 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 68 [2020-10-12 15:47:18,955 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 83 [2020-10-12 15:47:19,286 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 91 [2020-10-12 15:47:19,668 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 115 [2020-10-12 15:47:20,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:47:20,097 INFO L93 Difference]: Finished difference Result 102 states and 111 transitions. [2020-10-12 15:47:20,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-12 15:47:20,097 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 39 [2020-10-12 15:47:20,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:47:20,098 INFO L225 Difference]: With dead ends: 102 [2020-10-12 15:47:20,099 INFO L226 Difference]: Without dead ends: 100 [2020-10-12 15:47:20,100 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=144, Invalid=848, Unknown=0, NotChecked=0, Total=992 [2020-10-12 15:47:20,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-12 15:47:20,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 80. [2020-10-12 15:47:20,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-12 15:47:20,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 88 transitions. [2020-10-12 15:47:20,108 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 88 transitions. Word has length 39 [2020-10-12 15:47:20,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:47:20,108 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 88 transitions. [2020-10-12 15:47:20,108 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 15:47:20,108 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 88 transitions. [2020-10-12 15:47:20,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-12 15:47:20,109 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:47:20,109 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:47:20,109 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-12 15:47:20,109 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:47:20,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:47:20,110 INFO L82 PathProgramCache]: Analyzing trace with hash 2119057023, now seen corresponding path program 6 times [2020-10-12 15:47:20,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:47:20,110 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1941255665] [2020-10-12 15:47:20,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:47:20,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:47:20,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:20,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:20,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:20,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:22,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:22,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:23,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:25,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:47:25,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-12 15:47:25,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 15:47:25,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4940 [2020-10-12 15:47:25,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:47:25,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-12 15:47:25,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:47:25,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-12 15:47:25,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:47:25,259 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 33 [2020-10-12 15:47:25,423 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 42 [2020-10-12 15:47:25,646 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 67 [2020-10-12 15:47:26,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:47:26,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:47:26,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:26,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:47:26,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:47:26,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:47:26,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:47:26,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:47:26,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:47:26,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:47:26,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:47:26,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:47:26,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:47:26,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:47:26,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:26,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:26,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:47:26,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-12 15:47:26,497 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:47:26,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 341 [2020-10-12 15:47:26,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:47:26,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 15:47:26,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:47:26,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 15:47:26,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:47:27,090 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:47:27,091 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1941255665] [2020-10-12 15:47:27,091 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:47:27,091 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-12 15:47:27,091 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186414352] [2020-10-12 15:47:27,092 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-12 15:47:27,092 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:47:27,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-12 15:47:27,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=505, Unknown=0, NotChecked=0, Total=552 [2020-10-12 15:47:27,093 INFO L87 Difference]: Start difference. First operand 80 states and 88 transitions. Second operand 24 states. [2020-10-12 15:47:28,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:47:28,515 INFO L93 Difference]: Finished difference Result 100 states and 109 transitions. [2020-10-12 15:47:28,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 15:47:28,516 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 40 [2020-10-12 15:47:28,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:47:28,517 INFO L225 Difference]: With dead ends: 100 [2020-10-12 15:47:28,517 INFO L226 Difference]: Without dead ends: 98 [2020-10-12 15:47:28,518 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=81, Invalid=911, Unknown=0, NotChecked=0, Total=992 [2020-10-12 15:47:28,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-12 15:47:28,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 92. [2020-10-12 15:47:28,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-12 15:47:28,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 101 transitions. [2020-10-12 15:47:28,530 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 101 transitions. Word has length 40 [2020-10-12 15:47:28,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:47:28,530 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 101 transitions. [2020-10-12 15:47:28,530 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-12 15:47:28,530 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 101 transitions. [2020-10-12 15:47:28,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-12 15:47:28,531 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:47:28,531 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:47:28,531 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-12 15:47:28,531 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:47:28,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:47:28,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1561275979, now seen corresponding path program 7 times [2020-10-12 15:47:28,532 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:47:28,532 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [273818450] [2020-10-12 15:47:28,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:47:28,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:47:28,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:29,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:47:29,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-12 15:47:29,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:47:29,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 455 [2020-10-12 15:47:29,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:47:29,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 15:47:29,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 15:47:29,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-12 15:47:29,016 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:47:29,228 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 29 [2020-10-12 15:47:29,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:47:29,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:47:29,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:29,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:47:29,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:47:29,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:47:29,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 15:47:29,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:47:29,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:47:29,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:47:29,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:47:29,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:47:29,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:47:29,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:47:29,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:29,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:47:29,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-12 15:47:29,497 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:47:29,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 171 [2020-10-12 15:47:29,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:47:29,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 15:47:29,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:47:29,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-12 15:47:29,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:47:30,226 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:47:30,226 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [273818450] [2020-10-12 15:47:30,226 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:47:30,227 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 15:47:30,227 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514085475] [2020-10-12 15:47:30,227 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 15:47:30,227 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:47:30,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 15:47:30,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=304, Unknown=0, NotChecked=0, Total=342 [2020-10-12 15:47:30,228 INFO L87 Difference]: Start difference. First operand 92 states and 101 transitions. Second operand 19 states. [2020-10-12 15:47:30,553 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2020-10-12 15:47:30,817 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 53 [2020-10-12 15:47:31,120 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2020-10-12 15:47:31,305 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 61 [2020-10-12 15:47:31,562 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 67 [2020-10-12 15:47:31,771 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 80 [2020-10-12 15:47:32,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:47:32,031 INFO L93 Difference]: Finished difference Result 105 states and 116 transitions. [2020-10-12 15:47:32,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 15:47:32,032 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 40 [2020-10-12 15:47:32,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:47:32,033 INFO L225 Difference]: With dead ends: 105 [2020-10-12 15:47:32,034 INFO L226 Difference]: Without dead ends: 94 [2020-10-12 15:47:32,035 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=144, Invalid=726, Unknown=0, NotChecked=0, Total=870 [2020-10-12 15:47:32,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-12 15:47:32,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 92. [2020-10-12 15:47:32,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-12 15:47:32,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 100 transitions. [2020-10-12 15:47:32,045 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 100 transitions. Word has length 40 [2020-10-12 15:47:32,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:47:32,046 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 100 transitions. [2020-10-12 15:47:32,046 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 15:47:32,046 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 100 transitions. [2020-10-12 15:47:32,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-12 15:47:32,046 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:47:32,046 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:47:32,047 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-12 15:47:32,047 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:47:32,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:47:32,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1931574154, now seen corresponding path program 12 times [2020-10-12 15:47:32,047 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:47:32,047 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2131597667] [2020-10-12 15:47:32,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:47:32,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:47:32,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:32,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:33,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:47:33,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-12 15:47:33,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:47:33,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1181 [2020-10-12 15:47:33,237 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:47:33,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 15:47:33,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 15:47:33,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-12 15:47:33,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:47:33,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:47:33,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:47:33,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:33,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:47:33,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:47:33,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:47:33,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:47:33,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:47:33,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:47:33,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:47:33,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:47:33,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:47:33,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:47:33,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:47:33,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:33,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:47:33,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-12 15:47:33,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:47:33,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 142 [2020-10-12 15:47:33,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:47:33,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 15:47:33,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:47:33,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 15:47:33,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:47:34,141 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 35 [2020-10-12 15:47:34,346 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 41 [2020-10-12 15:47:34,462 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 20 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 15:47:34,463 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2131597667] [2020-10-12 15:47:34,463 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:47:34,463 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 15:47:34,463 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386569684] [2020-10-12 15:47:34,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 15:47:34,464 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:47:34,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 15:47:34,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2020-10-12 15:47:34,465 INFO L87 Difference]: Start difference. First operand 92 states and 100 transitions. Second operand 19 states. [2020-10-12 15:47:35,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:47:35,384 INFO L93 Difference]: Finished difference Result 113 states and 124 transitions. [2020-10-12 15:47:35,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 15:47:35,386 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 42 [2020-10-12 15:47:35,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:47:35,387 INFO L225 Difference]: With dead ends: 113 [2020-10-12 15:47:35,387 INFO L226 Difference]: Without dead ends: 97 [2020-10-12 15:47:35,388 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2020-10-12 15:47:35,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-12 15:47:35,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 92. [2020-10-12 15:47:35,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-12 15:47:35,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 99 transitions. [2020-10-12 15:47:35,398 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 99 transitions. Word has length 42 [2020-10-12 15:47:35,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:47:35,399 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 99 transitions. [2020-10-12 15:47:35,399 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 15:47:35,399 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 99 transitions. [2020-10-12 15:47:35,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-12 15:47:35,399 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:47:35,399 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:47:35,399 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-12 15:47:35,400 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:47:35,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:47:35,400 INFO L82 PathProgramCache]: Analyzing trace with hash -110356160, now seen corresponding path program 13 times [2020-10-12 15:47:35,400 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:47:35,400 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [927279180] [2020-10-12 15:47:35,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:47:35,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:47:35,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:35,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:36,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:36,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:36,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:39,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:47:39,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-12 15:47:39,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 15:47:39,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3657 [2020-10-12 15:47:39,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:47:39,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 15:47:39,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:47:39,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-12 15:47:39,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:47:39,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:47:39,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:47:39,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:39,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:47:39,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:47:39,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:47:39,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:47:39,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:47:39,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:47:39,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:47:39,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:47:39,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:47:39,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:47:39,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:47:39,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:39,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:47:39,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-12 15:47:39,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:47:39,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 322 [2020-10-12 15:47:39,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:47:39,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 15:47:39,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:47:39,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 15:47:39,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:47:40,415 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 58 [2020-10-12 15:47:40,646 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 55 [2020-10-12 15:47:40,942 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 55 [2020-10-12 15:47:41,216 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 48 [2020-10-12 15:47:41,390 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 51 [2020-10-12 15:47:41,411 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:47:41,411 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [927279180] [2020-10-12 15:47:41,411 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:47:41,412 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-12 15:47:41,412 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502076584] [2020-10-12 15:47:41,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-12 15:47:41,412 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:47:41,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-12 15:47:41,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=419, Unknown=0, NotChecked=0, Total=462 [2020-10-12 15:47:41,413 INFO L87 Difference]: Start difference. First operand 92 states and 99 transitions. Second operand 22 states. [2020-10-12 15:47:42,450 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2020-10-12 15:47:42,831 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 93 [2020-10-12 15:47:43,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:47:43,366 INFO L93 Difference]: Finished difference Result 124 states and 133 transitions. [2020-10-12 15:47:43,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-12 15:47:43,367 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 42 [2020-10-12 15:47:43,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:47:43,368 INFO L225 Difference]: With dead ends: 124 [2020-10-12 15:47:43,368 INFO L226 Difference]: Without dead ends: 122 [2020-10-12 15:47:43,369 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=101, Invalid=1021, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 15:47:43,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-12 15:47:43,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 111. [2020-10-12 15:47:43,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-12 15:47:43,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 120 transitions. [2020-10-12 15:47:43,383 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 120 transitions. Word has length 42 [2020-10-12 15:47:43,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:47:43,383 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 120 transitions. [2020-10-12 15:47:43,384 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-12 15:47:43,384 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 120 transitions. [2020-10-12 15:47:43,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-12 15:47:43,384 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:47:43,384 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:47:43,385 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-12 15:47:43,385 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:47:43,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:47:43,385 INFO L82 PathProgramCache]: Analyzing trace with hash 872540972, now seen corresponding path program 8 times [2020-10-12 15:47:43,385 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:47:43,385 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2032992843] [2020-10-12 15:47:43,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:47:43,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:47:43,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:44,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:47:44,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-12 15:47:44,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:47:44,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 774 [2020-10-12 15:47:44,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:47:44,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 15:47:44,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 15:47:44,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 15:47:44,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:47:44,356 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 33 [2020-10-12 15:47:44,504 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 43 [2020-10-12 15:47:44,655 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 30 [2020-10-12 15:47:44,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:47:44,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:47:44,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:44,735 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:47:44,735 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:47:44,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:47:44,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:47:44,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:47:44,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:47:44,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:47:44,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:47:44,736 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:47:44,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:47:44,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:47:44,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:45,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:47:45,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-12 15:47:45,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:47:45,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 232 [2020-10-12 15:47:45,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:47:45,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 15:47:45,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:47:45,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-12 15:47:45,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:47:45,663 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 50 [2020-10-12 15:47:45,917 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 50 [2020-10-12 15:47:46,279 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 47 [2020-10-12 15:47:46,561 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 43 [2020-10-12 15:47:46,730 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:47:46,730 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2032992843] [2020-10-12 15:47:46,730 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:47:46,731 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 15:47:46,731 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149341040] [2020-10-12 15:47:46,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 15:47:46,731 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:47:46,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 15:47:46,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2020-10-12 15:47:46,732 INFO L87 Difference]: Start difference. First operand 111 states and 120 transitions. Second operand 21 states. [2020-10-12 15:47:48,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:47:48,065 INFO L93 Difference]: Finished difference Result 126 states and 137 transitions. [2020-10-12 15:47:48,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 15:47:48,065 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 43 [2020-10-12 15:47:48,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:47:48,066 INFO L225 Difference]: With dead ends: 126 [2020-10-12 15:47:48,067 INFO L226 Difference]: Without dead ends: 115 [2020-10-12 15:47:48,068 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=100, Invalid=830, Unknown=0, NotChecked=0, Total=930 [2020-10-12 15:47:48,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-12 15:47:48,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 102. [2020-10-12 15:47:48,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-12 15:47:48,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 110 transitions. [2020-10-12 15:47:48,080 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 110 transitions. Word has length 43 [2020-10-12 15:47:48,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:47:48,080 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 110 transitions. [2020-10-12 15:47:48,080 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 15:47:48,080 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 110 transitions. [2020-10-12 15:47:48,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-12 15:47:48,081 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:47:48,081 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2020-10-12 15:47:48,081 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-12 15:47:48,081 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:47:48,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:47:48,082 INFO L82 PathProgramCache]: Analyzing trace with hash -1393148745, now seen corresponding path program 2 times [2020-10-12 15:47:48,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:47:48,082 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1765295851] [2020-10-12 15:47:48,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:47:48,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:47:48,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:48,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:48,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:48,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:48,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:49,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:50,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:50,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:51,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:47:51,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-12 15:47:51,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 15:47:51,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3556 [2020-10-12 15:47:51,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:47:51,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 15:47:51,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:47:51,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-12 15:47:51,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:47:51,965 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 38 [2020-10-12 15:47:52,158 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 37 [2020-10-12 15:47:52,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:47:52,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:47:52,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:52,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:47:52,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:47:52,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:47:52,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:47:52,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:47:52,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:47:52,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:47:52,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:47:52,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:47:52,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:47:52,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:47:52,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:52,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:47:52,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-12 15:47:52,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:47:52,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 99 [2020-10-12 15:47:52,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:47:52,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 15:47:52,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:47:52,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 15:47:52,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:47:53,335 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:47:53,335 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1765295851] [2020-10-12 15:47:53,335 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:47:53,335 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-12 15:47:53,335 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614926040] [2020-10-12 15:47:53,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-12 15:47:53,336 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:47:53,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-12 15:47:53,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=461, Unknown=0, NotChecked=0, Total=506 [2020-10-12 15:47:53,336 INFO L87 Difference]: Start difference. First operand 102 states and 110 transitions. Second operand 23 states. [2020-10-12 15:47:54,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:47:54,709 INFO L93 Difference]: Finished difference Result 111 states and 121 transitions. [2020-10-12 15:47:54,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 15:47:54,710 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 44 [2020-10-12 15:47:54,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:47:54,711 INFO L225 Difference]: With dead ends: 111 [2020-10-12 15:47:54,712 INFO L226 Difference]: Without dead ends: 109 [2020-10-12 15:47:54,713 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=88, Invalid=968, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 15:47:54,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-12 15:47:54,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 107. [2020-10-12 15:47:54,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-12 15:47:54,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 116 transitions. [2020-10-12 15:47:54,733 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 116 transitions. Word has length 44 [2020-10-12 15:47:54,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:47:54,733 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 116 transitions. [2020-10-12 15:47:54,733 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-12 15:47:54,733 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 116 transitions. [2020-10-12 15:47:54,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-12 15:47:54,734 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:47:54,734 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:47:54,735 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-12 15:47:54,735 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:47:54,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:47:54,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1037946912, now seen corresponding path program 3 times [2020-10-12 15:47:54,735 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:47:54,736 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1642596661] [2020-10-12 15:47:54,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:47:54,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:47:54,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:54,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:55,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:55,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:56,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:57,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:47:59,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:47:59,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-12 15:47:59,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 15:47:59,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-12 15:47:59,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:47:59,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-12 15:47:59,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:47:59,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-12 15:47:59,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:00,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:48:00,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:00,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:00,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:00,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:48:00,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:00,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:48:00,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:00,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:48:00,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:48:00,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:48:00,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:00,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:48:00,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:00,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:00,413 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:00,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-12 15:48:00,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:00,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 208 [2020-10-12 15:48:00,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:00,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 15:48:00,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:48:00,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 15:48:00,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:00,791 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 43 [2020-10-12 15:48:00,967 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2020-10-12 15:48:01,588 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:48:01,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1642596661] [2020-10-12 15:48:01,589 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:48:01,589 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-12 15:48:01,589 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263063819] [2020-10-12 15:48:01,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-12 15:48:01,589 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:48:01,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-12 15:48:01,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=503, Unknown=0, NotChecked=0, Total=552 [2020-10-12 15:48:01,590 INFO L87 Difference]: Start difference. First operand 107 states and 116 transitions. Second operand 24 states. [2020-10-12 15:48:03,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:48:03,571 INFO L93 Difference]: Finished difference Result 116 states and 126 transitions. [2020-10-12 15:48:03,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 15:48:03,572 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 45 [2020-10-12 15:48:03,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:48:03,573 INFO L225 Difference]: With dead ends: 116 [2020-10-12 15:48:03,573 INFO L226 Difference]: Without dead ends: 114 [2020-10-12 15:48:03,574 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=103, Invalid=1087, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 15:48:03,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-12 15:48:03,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 108. [2020-10-12 15:48:03,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-12 15:48:03,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 117 transitions. [2020-10-12 15:48:03,587 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 117 transitions. Word has length 45 [2020-10-12 15:48:03,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:48:03,587 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 117 transitions. [2020-10-12 15:48:03,587 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-12 15:48:03,587 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 117 transitions. [2020-10-12 15:48:03,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-12 15:48:03,588 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:48:03,588 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:48:03,588 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-12 15:48:03,589 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:48:03,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:48:03,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1969442569, now seen corresponding path program 14 times [2020-10-12 15:48:03,589 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:48:03,589 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [670484720] [2020-10-12 15:48:03,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:48:03,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:03,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:04,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:05,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:05,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-12 15:48:05,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:48:05,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2115 [2020-10-12 15:48:05,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:05,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 15:48:05,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:48:05,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-12 15:48:05,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:05,931 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2020-10-12 15:48:06,072 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 57 [2020-10-12 15:48:06,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:48:06,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:06,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:06,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:06,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:48:06,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:06,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:48:06,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:06,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:48:06,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:48:06,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:48:06,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:06,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:48:06,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:06,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:06,679 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:06,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-12 15:48:06,680 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:06,680 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 322 [2020-10-12 15:48:06,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:06,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 15:48:06,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:48:06,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 15:48:06,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:07,298 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 34 [2020-10-12 15:48:07,449 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 34 [2020-10-12 15:48:07,827 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 50 [2020-10-12 15:48:08,335 WARN L193 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 189 DAG size of output: 47 [2020-10-12 15:48:09,252 WARN L193 SmtUtils]: Spent 709.00 ms on a formula simplification. DAG size of input: 316 DAG size of output: 49 [2020-10-12 15:48:10,929 WARN L193 SmtUtils]: Spent 1.40 s on a formula simplification. DAG size of input: 613 DAG size of output: 50 [2020-10-12 15:48:11,305 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 45 [2020-10-12 15:48:11,331 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:48:11,331 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [670484720] [2020-10-12 15:48:11,331 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:48:11,331 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-12 15:48:11,331 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135163064] [2020-10-12 15:48:11,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-12 15:48:11,332 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:48:11,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-12 15:48:11,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2020-10-12 15:48:11,332 INFO L87 Difference]: Start difference. First operand 108 states and 117 transitions. Second operand 24 states. [2020-10-12 15:48:12,142 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 57 [2020-10-12 15:48:12,709 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-10-12 15:48:13,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:48:13,419 INFO L93 Difference]: Finished difference Result 133 states and 143 transitions. [2020-10-12 15:48:13,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-12 15:48:13,420 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 45 [2020-10-12 15:48:13,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:48:13,422 INFO L225 Difference]: With dead ends: 133 [2020-10-12 15:48:13,422 INFO L226 Difference]: Without dead ends: 131 [2020-10-12 15:48:13,423 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=100, Invalid=892, Unknown=0, NotChecked=0, Total=992 [2020-10-12 15:48:13,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-12 15:48:13,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 120. [2020-10-12 15:48:13,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-12 15:48:13,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 130 transitions. [2020-10-12 15:48:13,438 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 130 transitions. Word has length 45 [2020-10-12 15:48:13,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:48:13,438 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 130 transitions. [2020-10-12 15:48:13,438 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-12 15:48:13,438 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 130 transitions. [2020-10-12 15:48:13,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-12 15:48:13,439 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:48:13,439 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:48:13,439 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-12 15:48:13,440 INFO L427 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:48:13,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:48:13,440 INFO L82 PathProgramCache]: Analyzing trace with hash 283594413, now seen corresponding path program 15 times [2020-10-12 15:48:13,440 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:48:13,440 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1785475545] [2020-10-12 15:48:13,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:48:13,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:13,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:13,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:14,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:15,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:16,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:16,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:18,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:18,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-12 15:48:18,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 15:48:18,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-12 15:48:18,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:18,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 15:48:18,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 15:48:18,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-12 15:48:18,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:18,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:48:18,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:18,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:18,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:18,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:48:18,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:18,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:48:18,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:18,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:48:18,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:48:18,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:48:18,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:18,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:48:18,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:18,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:19,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:19,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-12 15:48:19,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:19,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 489 [2020-10-12 15:48:19,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:19,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 15:48:19,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:48:19,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 15:48:19,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:20,238 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 69 [2020-10-12 15:48:20,577 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 69 [2020-10-12 15:48:20,983 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 62 [2020-10-12 15:48:21,700 WARN L193 SmtUtils]: Spent 538.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 57 [2020-10-12 15:48:21,959 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 44 [2020-10-12 15:48:21,985 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 1 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:48:21,986 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1785475545] [2020-10-12 15:48:21,986 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:48:21,986 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-12 15:48:21,986 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605201525] [2020-10-12 15:48:21,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-12 15:48:21,986 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:48:21,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-12 15:48:21,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=503, Unknown=0, NotChecked=0, Total=552 [2020-10-12 15:48:21,987 INFO L87 Difference]: Start difference. First operand 120 states and 130 transitions. Second operand 24 states. [2020-10-12 15:48:22,831 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 69 [2020-10-12 15:48:23,069 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 74 [2020-10-12 15:48:23,429 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 90 [2020-10-12 15:48:23,823 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 97 [2020-10-12 15:48:24,300 WARN L193 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 116 [2020-10-12 15:48:24,843 WARN L193 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 123 [2020-10-12 15:48:25,461 WARN L193 SmtUtils]: Spent 519.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 152 [2020-10-12 15:48:26,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:48:26,053 INFO L93 Difference]: Finished difference Result 136 states and 147 transitions. [2020-10-12 15:48:26,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-12 15:48:26,054 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 45 [2020-10-12 15:48:26,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:48:26,056 INFO L225 Difference]: With dead ends: 136 [2020-10-12 15:48:26,056 INFO L226 Difference]: Without dead ends: 134 [2020-10-12 15:48:26,057 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=195, Invalid=1211, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 15:48:26,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-12 15:48:26,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 111. [2020-10-12 15:48:26,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-12 15:48:26,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 121 transitions. [2020-10-12 15:48:26,080 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 121 transitions. Word has length 45 [2020-10-12 15:48:26,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:48:26,080 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 121 transitions. [2020-10-12 15:48:26,080 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-12 15:48:26,080 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 121 transitions. [2020-10-12 15:48:26,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-12 15:48:26,081 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:48:26,081 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:48:26,081 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-12 15:48:26,081 INFO L427 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:48:26,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:48:26,082 INFO L82 PathProgramCache]: Analyzing trace with hash -924562859, now seen corresponding path program 9 times [2020-10-12 15:48:26,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:48:26,082 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1889757710] [2020-10-12 15:48:26,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:48:26,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:26,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:26,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:27,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:27,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:28,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:29,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:29,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:30,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:31,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:31,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-12 15:48:31,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 15:48:31,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5120 [2020-10-12 15:48:31,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:31,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-12 15:48:31,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:48:31,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-12 15:48:31,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:31,447 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 41 [2020-10-12 15:48:31,602 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 41 [2020-10-12 15:48:31,761 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2020-10-12 15:48:31,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:48:31,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:31,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:31,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:31,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:48:31,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:31,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:48:31,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:31,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:48:31,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:48:31,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:48:31,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:31,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:48:32,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:32,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:32,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:32,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-12 15:48:32,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:32,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 389 [2020-10-12 15:48:32,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:32,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 15:48:32,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:48:32,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 15:48:32,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:32,992 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-10-12 15:48:33,152 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2020-10-12 15:48:33,380 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 53 [2020-10-12 15:48:33,612 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 48 [2020-10-12 15:48:33,837 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 45 [2020-10-12 15:48:34,040 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:48:34,040 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1889757710] [2020-10-12 15:48:34,040 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:48:34,040 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-12 15:48:34,040 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393776563] [2020-10-12 15:48:34,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-12 15:48:34,041 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:48:34,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-12 15:48:34,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=550, Unknown=0, NotChecked=0, Total=600 [2020-10-12 15:48:34,041 INFO L87 Difference]: Start difference. First operand 111 states and 121 transitions. Second operand 25 states. [2020-10-12 15:48:34,790 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 64 [2020-10-12 15:48:35,820 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 57 [2020-10-12 15:48:36,082 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 64 [2020-10-12 15:48:36,350 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 71 [2020-10-12 15:48:36,620 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 74 [2020-10-12 15:48:36,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:48:36,961 INFO L93 Difference]: Finished difference Result 139 states and 151 transitions. [2020-10-12 15:48:36,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-12 15:48:36,961 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 46 [2020-10-12 15:48:36,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:48:36,963 INFO L225 Difference]: With dead ends: 139 [2020-10-12 15:48:36,963 INFO L226 Difference]: Without dead ends: 137 [2020-10-12 15:48:36,965 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=123, Invalid=1209, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 15:48:36,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-12 15:48:36,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 131. [2020-10-12 15:48:36,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-12 15:48:36,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 144 transitions. [2020-10-12 15:48:36,981 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 144 transitions. Word has length 46 [2020-10-12 15:48:36,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:48:36,982 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 144 transitions. [2020-10-12 15:48:36,982 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-12 15:48:36,982 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 144 transitions. [2020-10-12 15:48:36,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-12 15:48:36,982 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:48:36,983 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:48:36,983 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-12 15:48:36,983 INFO L427 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:48:36,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:48:36,983 INFO L82 PathProgramCache]: Analyzing trace with hash 200106847, now seen corresponding path program 10 times [2020-10-12 15:48:36,984 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:48:36,984 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1097557904] [2020-10-12 15:48:36,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:48:36,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:37,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:37,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:38,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:38,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-12 15:48:38,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:48:38,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1687 [2020-10-12 15:48:38,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:38,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 15:48:38,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 15:48:38,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-12 15:48:38,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:38,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:48:38,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:38,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:38,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:38,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:48:38,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:38,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:48:38,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:38,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:48:38,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:48:38,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:48:38,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:38,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:48:38,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:38,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:39,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:39,159 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-12 15:48:39,159 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:39,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 291 [2020-10-12 15:48:39,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:39,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 15:48:39,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:48:39,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 15:48:39,160 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:39,924 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 48 [2020-10-12 15:48:40,214 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 12 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:48:40,214 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1097557904] [2020-10-12 15:48:40,215 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:48:40,215 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-12 15:48:40,215 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195370227] [2020-10-12 15:48:40,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-12 15:48:40,215 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:48:40,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-12 15:48:40,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2020-10-12 15:48:40,216 INFO L87 Difference]: Start difference. First operand 131 states and 144 transitions. Second operand 22 states. [2020-10-12 15:48:40,971 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2020-10-12 15:48:41,222 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 70 [2020-10-12 15:48:41,506 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 78 [2020-10-12 15:48:41,827 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 101 [2020-10-12 15:48:42,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:48:42,169 INFO L93 Difference]: Finished difference Result 142 states and 157 transitions. [2020-10-12 15:48:42,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-12 15:48:42,170 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 46 [2020-10-12 15:48:42,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:48:42,174 INFO L225 Difference]: With dead ends: 142 [2020-10-12 15:48:42,175 INFO L226 Difference]: Without dead ends: 131 [2020-10-12 15:48:42,175 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=187, Invalid=1003, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 15:48:42,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-12 15:48:42,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2020-10-12 15:48:42,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-12 15:48:42,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 143 transitions. [2020-10-12 15:48:42,191 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 143 transitions. Word has length 46 [2020-10-12 15:48:42,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:48:42,191 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 143 transitions. [2020-10-12 15:48:42,192 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-12 15:48:42,192 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 143 transitions. [2020-10-12 15:48:42,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-12 15:48:42,192 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:48:42,192 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:48:42,192 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-12 15:48:42,193 INFO L427 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:48:42,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:48:42,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1885596128, now seen corresponding path program 16 times [2020-10-12 15:48:42,193 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:48:42,193 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1791325011] [2020-10-12 15:48:42,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:48:42,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:42,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:43,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:43,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-12 15:48:43,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:43,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 896 [2020-10-12 15:48:43,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:43,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 15:48:43,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 15:48:43,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-12 15:48:43,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:43,268 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2020-10-12 15:48:43,410 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2020-10-12 15:48:43,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:48:43,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:43,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:43,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:43,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:48:43,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:43,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:48:43,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:43,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:48:43,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:48:43,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:48:43,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:43,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:48:43,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:43,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:43,852 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:43,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-12 15:48:43,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:43,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 239 [2020-10-12 15:48:43,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:43,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 15:48:43,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:48:43,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-12 15:48:43,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:44,776 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 55 [2020-10-12 15:48:44,941 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2020-10-12 15:48:44,965 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 25 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 15:48:44,966 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1791325011] [2020-10-12 15:48:44,966 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:48:44,966 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-12 15:48:44,966 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711901411] [2020-10-12 15:48:44,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-12 15:48:44,967 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:48:44,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-12 15:48:44,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=414, Unknown=0, NotChecked=0, Total=462 [2020-10-12 15:48:44,967 INFO L87 Difference]: Start difference. First operand 131 states and 143 transitions. Second operand 22 states. [2020-10-12 15:48:45,698 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 56 [2020-10-12 15:48:46,149 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 102 [2020-10-12 15:48:46,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:48:46,640 INFO L93 Difference]: Finished difference Result 148 states and 160 transitions. [2020-10-12 15:48:46,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-12 15:48:46,640 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 48 [2020-10-12 15:48:46,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:48:46,642 INFO L225 Difference]: With dead ends: 148 [2020-10-12 15:48:46,642 INFO L226 Difference]: Without dead ends: 132 [2020-10-12 15:48:46,643 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2020-10-12 15:48:46,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-12 15:48:46,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 126. [2020-10-12 15:48:46,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-12 15:48:46,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 135 transitions. [2020-10-12 15:48:46,661 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 135 transitions. Word has length 48 [2020-10-12 15:48:46,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:48:46,661 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 135 transitions. [2020-10-12 15:48:46,661 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-12 15:48:46,661 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 135 transitions. [2020-10-12 15:48:46,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-12 15:48:46,662 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:48:46,662 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:48:46,662 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-12 15:48:46,662 INFO L427 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:48:46,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:48:46,663 INFO L82 PathProgramCache]: Analyzing trace with hash 361425002, now seen corresponding path program 17 times [2020-10-12 15:48:46,663 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:48:46,663 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1966781200] [2020-10-12 15:48:46,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:48:46,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:46,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:46,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:47,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:48,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:48,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:48,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:49,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:51,682 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:51,682 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-12 15:48:51,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 15:48:51,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-12 15:48:51,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:51,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-12 15:48:51,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 15:48:51,683 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-12 15:48:51,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:52,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:48:52,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:52,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:52,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:52,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:48:52,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:52,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:48:52,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:52,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:48:52,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:48:52,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:48:52,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:52,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:48:52,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:52,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:52,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:52,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-12 15:48:52,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:52,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 497 [2020-10-12 15:48:52,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:52,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 15:48:52,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:48:52,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 15:48:52,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:53,168 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 44 [2020-10-12 15:48:53,343 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2020-10-12 15:48:53,617 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 59 [2020-10-12 15:48:53,896 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 56 [2020-10-12 15:48:54,314 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 73 [2020-10-12 15:48:55,012 WARN L193 SmtUtils]: Spent 548.00 ms on a formula simplification. DAG size of input: 226 DAG size of output: 78 [2020-10-12 15:48:56,160 WARN L193 SmtUtils]: Spent 904.00 ms on a formula simplification. DAG size of input: 412 DAG size of output: 74 [2020-10-12 15:48:57,021 WARN L193 SmtUtils]: Spent 592.00 ms on a formula simplification. DAG size of input: 368 DAG size of output: 77 [2020-10-12 15:48:57,342 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 68 [2020-10-12 15:48:57,379 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:48:57,380 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1966781200] [2020-10-12 15:48:57,380 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:48:57,380 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-12 15:48:57,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049477026] [2020-10-12 15:48:57,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-12 15:48:57,380 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:48:57,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-12 15:48:57,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=596, Unknown=0, NotChecked=0, Total=650 [2020-10-12 15:48:57,381 INFO L87 Difference]: Start difference. First operand 126 states and 135 transitions. Second operand 26 states. [2020-10-12 15:48:58,521 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 66 [2020-10-12 15:48:58,829 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 72 [2020-10-12 15:48:59,151 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 83 [2020-10-12 15:48:59,398 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-10-12 15:48:59,852 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-12 15:49:00,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:49:00,709 INFO L93 Difference]: Finished difference Result 161 states and 172 transitions. [2020-10-12 15:49:00,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 15:49:00,710 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 48 [2020-10-12 15:49:00,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:49:00,711 INFO L225 Difference]: With dead ends: 161 [2020-10-12 15:49:00,711 INFO L226 Difference]: Without dead ends: 159 [2020-10-12 15:49:00,713 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=111, Invalid=1295, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 15:49:00,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-12 15:49:00,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 148. [2020-10-12 15:49:00,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-12 15:49:00,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 159 transitions. [2020-10-12 15:49:00,733 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 159 transitions. Word has length 48 [2020-10-12 15:49:00,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:49:00,734 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 159 transitions. [2020-10-12 15:49:00,734 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-12 15:49:00,734 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 159 transitions. [2020-10-12 15:49:00,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-12 15:49:00,735 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:49:00,735 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 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] [2020-10-12 15:49:00,735 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-12 15:49:00,735 INFO L427 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:49:00,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:49:00,736 INFO L82 PathProgramCache]: Analyzing trace with hash -357940310, now seen corresponding path program 3 times [2020-10-12 15:49:00,736 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:49:00,736 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [644008924] [2020-10-12 15:49:00,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:49:00,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:49:00,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:00,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:00,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:00,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:01,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:01,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:03,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:05,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:49:05,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-12 15:49:05,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 15:49:05,747 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 15:49:05,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:49:05,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 15:49:05,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:49:05,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-12 15:49:05,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:49:06,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:49:06,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:49:06,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:06,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:49:06,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:49:06,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:49:06,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:49:06,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:49:06,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:49:06,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:49:06,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:49:06,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:49:06,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:49:06,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:49:06,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:06,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:06,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:49:06,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-12 15:49:06,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:49:06,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 191 [2020-10-12 15:49:06,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:49:06,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 15:49:06,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:49:06,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-12 15:49:06,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:49:06,653 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 12 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:49:06,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [644008924] [2020-10-12 15:49:06,654 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:49:06,654 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-12 15:49:06,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470762820] [2020-10-12 15:49:06,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-12 15:49:06,654 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:49:06,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-12 15:49:06,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2020-10-12 15:49:06,655 INFO L87 Difference]: Start difference. First operand 148 states and 159 transitions. Second operand 23 states. [2020-10-12 15:49:07,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:49:07,769 INFO L93 Difference]: Finished difference Result 159 states and 171 transitions. [2020-10-12 15:49:07,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-12 15:49:07,770 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 49 [2020-10-12 15:49:07,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:49:07,771 INFO L225 Difference]: With dead ends: 159 [2020-10-12 15:49:07,772 INFO L226 Difference]: Without dead ends: 126 [2020-10-12 15:49:07,773 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=126, Invalid=1064, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 15:49:07,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-12 15:49:07,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2020-10-12 15:49:07,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-12 15:49:07,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 135 transitions. [2020-10-12 15:49:07,790 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 135 transitions. Word has length 49 [2020-10-12 15:49:07,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:49:07,790 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 135 transitions. [2020-10-12 15:49:07,790 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-12 15:49:07,790 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 135 transitions. [2020-10-12 15:49:07,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-12 15:49:07,791 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:49:07,791 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:49:07,791 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-12 15:49:07,791 INFO L427 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:49:07,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:49:07,792 INFO L82 PathProgramCache]: Analyzing trace with hash -1682112190, now seen corresponding path program 11 times [2020-10-12 15:49:07,792 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:49:07,792 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [802337838] [2020-10-12 15:49:07,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:49:07,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:49:07,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:08,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:08,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:09,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:12,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:13,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:49:13,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-12 15:49:13,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 15:49:13,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5379 [2020-10-12 15:49:13,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:49:13,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-12 15:49:13,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:49:13,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-12 15:49:13,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:49:13,441 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 33 [2020-10-12 15:49:13,622 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 47 [2020-10-12 15:49:13,770 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2020-10-12 15:49:14,134 WARN L193 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 65 [2020-10-12 15:49:14,382 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 50 [2020-10-12 15:49:14,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:49:14,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:49:14,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:14,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:49:14,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:49:14,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:49:14,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:49:14,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:49:14,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:49:14,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:49:14,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:49:14,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:49:14,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:49:14,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:49:14,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:14,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:15,112 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:49:15,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-12 15:49:15,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:49:15,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 437 [2020-10-12 15:49:15,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:49:15,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 15:49:15,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:49:15,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 15:49:15,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:49:15,833 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2020-10-12 15:49:16,103 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 9 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-12 15:49:16,103 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [802337838] [2020-10-12 15:49:16,103 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:49:16,103 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-12 15:49:16,104 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764802400] [2020-10-12 15:49:16,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-12 15:49:16,104 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:49:16,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-12 15:49:16,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=542, Unknown=0, NotChecked=0, Total=600 [2020-10-12 15:49:16,104 INFO L87 Difference]: Start difference. First operand 126 states and 135 transitions. Second operand 25 states. [2020-10-12 15:49:16,582 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 44 [2020-10-12 15:49:16,895 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 50 [2020-10-12 15:49:17,125 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 64 [2020-10-12 15:49:17,494 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-12 15:49:18,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:49:18,244 INFO L93 Difference]: Finished difference Result 140 states and 150 transitions. [2020-10-12 15:49:18,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-12 15:49:18,244 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 49 [2020-10-12 15:49:18,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:49:18,245 INFO L225 Difference]: With dead ends: 140 [2020-10-12 15:49:18,245 INFO L226 Difference]: Without dead ends: 138 [2020-10-12 15:49:18,246 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=157, Invalid=1403, Unknown=0, NotChecked=0, Total=1560 [2020-10-12 15:49:18,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-12 15:49:18,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 129. [2020-10-12 15:49:18,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-12 15:49:18,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 139 transitions. [2020-10-12 15:49:18,260 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 139 transitions. Word has length 49 [2020-10-12 15:49:18,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:49:18,261 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 139 transitions. [2020-10-12 15:49:18,261 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-12 15:49:18,261 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 139 transitions. [2020-10-12 15:49:18,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-12 15:49:18,262 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:49:18,262 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:49:18,262 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-12 15:49:18,262 INFO L427 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:49:18,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:49:18,263 INFO L82 PathProgramCache]: Analyzing trace with hash 1572039137, now seen corresponding path program 4 times [2020-10-12 15:49:18,263 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:49:18,263 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [478897713] [2020-10-12 15:49:18,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:49:18,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:49:18,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:18,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:18,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:18,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:19,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:22,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:22,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:23,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:49:23,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-12 15:49:23,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 15:49:23,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 15:49:23,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:49:23,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-12 15:49:23,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 15:49:23,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-12 15:49:23,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:49:23,434 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 33 [2020-10-12 15:49:23,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:49:23,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:49:23,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:23,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:49:23,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:49:23,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:49:23,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:49:23,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:49:23,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:49:23,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:49:23,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:49:23,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:49:23,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:49:23,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:49:23,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:24,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:49:24,034 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-12 15:49:24,034 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:49:24,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 152 [2020-10-12 15:49:24,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:49:24,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 15:49:24,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:49:24,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 15:49:24,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:49:24,655 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 34 [2020-10-12 15:49:24,857 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 33 [2020-10-12 15:49:24,988 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 15:49:24,989 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [478897713] [2020-10-12 15:49:24,989 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:49:24,989 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-12 15:49:24,989 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664142796] [2020-10-12 15:49:24,989 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-12 15:49:24,989 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:49:24,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-12 15:49:24,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=500, Unknown=0, NotChecked=0, Total=552 [2020-10-12 15:49:24,990 INFO L87 Difference]: Start difference. First operand 129 states and 139 transitions. Second operand 24 states. [2020-10-12 15:49:26,398 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 66 [2020-10-12 15:49:27,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:49:27,028 INFO L93 Difference]: Finished difference Result 138 states and 150 transitions. [2020-10-12 15:49:27,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 15:49:27,029 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 50 [2020-10-12 15:49:27,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:49:27,030 INFO L225 Difference]: With dead ends: 138 [2020-10-12 15:49:27,030 INFO L226 Difference]: Without dead ends: 136 [2020-10-12 15:49:27,031 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=132, Invalid=1274, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 15:49:27,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-12 15:49:27,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 134. [2020-10-12 15:49:27,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-12 15:49:27,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 145 transitions. [2020-10-12 15:49:27,052 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 145 transitions. Word has length 50 [2020-10-12 15:49:27,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:49:27,052 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 145 transitions. [2020-10-12 15:49:27,052 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-12 15:49:27,052 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 145 transitions. [2020-10-12 15:49:27,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-12 15:49:27,053 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:49:27,053 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:49:27,053 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-12 15:49:27,054 INFO L427 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:49:27,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:49:27,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1401141770, now seen corresponding path program 4 times [2020-10-12 15:49:27,054 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:49:27,054 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [3326132] [2020-10-12 15:49:27,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:49:27,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:49:27,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:27,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:28,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:32,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:49:32,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-12 15:49:32,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:49:32,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-12 15:49:32,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:49:32,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-12 15:49:32,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:49:32,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-12 15:49:32,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:49:32,380 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 46 [2020-10-12 15:49:32,585 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 46 [2020-10-12 15:49:32,697 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-10-12 15:49:33,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:49:33,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:49:33,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:33,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:49:33,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:49:33,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:49:33,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:49:33,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:49:33,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:49:33,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:49:33,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:49:33,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:49:33,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:49:33,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:49:33,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:33,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:49:33,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-12 15:49:33,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:49:33,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 355 [2020-10-12 15:49:33,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:49:33,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 15:49:33,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:49:33,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 15:49:33,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:49:34,216 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 56 [2020-10-12 15:49:34,425 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 54 [2020-10-12 15:49:34,809 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 57 [2020-10-12 15:49:35,161 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 53 [2020-10-12 15:49:35,502 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 50 [2020-10-12 15:49:35,809 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 46 [2020-10-12 15:49:35,841 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:49:35,841 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [3326132] [2020-10-12 15:49:35,841 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:49:35,841 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-12 15:49:35,841 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682287679] [2020-10-12 15:49:35,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-12 15:49:35,842 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:49:35,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-12 15:49:35,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=648, Unknown=0, NotChecked=0, Total=702 [2020-10-12 15:49:35,843 INFO L87 Difference]: Start difference. First operand 134 states and 145 transitions. Second operand 27 states. [2020-10-12 15:49:36,680 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 67 [2020-10-12 15:49:37,190 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-10-12 15:49:38,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:49:38,744 INFO L93 Difference]: Finished difference Result 146 states and 158 transitions. [2020-10-12 15:49:38,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 15:49:38,745 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 51 [2020-10-12 15:49:38,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:49:38,746 INFO L225 Difference]: With dead ends: 146 [2020-10-12 15:49:38,746 INFO L226 Difference]: Without dead ends: 144 [2020-10-12 15:49:38,747 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=124, Invalid=1436, Unknown=0, NotChecked=0, Total=1560 [2020-10-12 15:49:38,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-12 15:49:38,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 138. [2020-10-12 15:49:38,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-12 15:49:38,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 149 transitions. [2020-10-12 15:49:38,767 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 149 transitions. Word has length 51 [2020-10-12 15:49:38,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:49:38,767 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 149 transitions. [2020-10-12 15:49:38,767 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-12 15:49:38,767 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 149 transitions. [2020-10-12 15:49:38,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-12 15:49:38,768 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:49:38,768 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:49:38,768 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-12 15:49:38,768 INFO L427 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:49:38,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:49:38,769 INFO L82 PathProgramCache]: Analyzing trace with hash -269837939, now seen corresponding path program 18 times [2020-10-12 15:49:38,769 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:49:38,769 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2131382249] [2020-10-12 15:49:38,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:49:38,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:49:38,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:38,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:40,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:42,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:49:42,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-12 15:49:42,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 15:49:42,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3897 [2020-10-12 15:49:42,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:49:42,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-12 15:49:42,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:49:42,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-12 15:49:42,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:49:42,931 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 50 [2020-10-12 15:49:43,108 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 65 [2020-10-12 15:49:43,256 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2020-10-12 15:49:43,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:49:43,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:49:43,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:43,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:49:43,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:49:43,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:49:43,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:49:43,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:49:43,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:49:43,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:49:43,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:49:43,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:49:43,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:49:43,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:49:43,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:44,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:49:44,094 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-12 15:49:44,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:49:44,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 526 [2020-10-12 15:49:44,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:49:44,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 15:49:44,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:49:44,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 15:49:44,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:49:44,733 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 48 [2020-10-12 15:49:44,909 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 46 [2020-10-12 15:49:45,347 WARN L193 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 63 [2020-10-12 15:49:45,755 WARN L193 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 57 [2020-10-12 15:49:46,272 WARN L193 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 59 [2020-10-12 15:49:46,652 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 51 [2020-10-12 15:49:46,926 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 47 [2020-10-12 15:49:46,962 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:49:46,962 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2131382249] [2020-10-12 15:49:46,962 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:49:46,962 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-12 15:49:46,962 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27105230] [2020-10-12 15:49:46,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-12 15:49:46,963 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:49:46,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-12 15:49:46,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=645, Unknown=0, NotChecked=0, Total=702 [2020-10-12 15:49:46,964 INFO L87 Difference]: Start difference. First operand 138 states and 149 transitions. Second operand 27 states. [2020-10-12 15:49:48,040 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2020-10-12 15:49:48,506 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 77 [2020-10-12 15:49:49,004 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-10-12 15:49:50,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:49:50,269 INFO L93 Difference]: Finished difference Result 157 states and 169 transitions. [2020-10-12 15:49:50,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-12 15:49:50,270 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 51 [2020-10-12 15:49:50,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:49:50,271 INFO L225 Difference]: With dead ends: 157 [2020-10-12 15:49:50,271 INFO L226 Difference]: Without dead ends: 155 [2020-10-12 15:49:50,274 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=152, Invalid=2010, Unknown=0, NotChecked=0, Total=2162 [2020-10-12 15:49:50,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-12 15:49:50,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 141. [2020-10-12 15:49:50,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-12 15:49:50,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 153 transitions. [2020-10-12 15:49:50,290 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 153 transitions. Word has length 51 [2020-10-12 15:49:50,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:49:50,290 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 153 transitions. [2020-10-12 15:49:50,290 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-12 15:49:50,290 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 153 transitions. [2020-10-12 15:49:50,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-12 15:49:50,291 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:49:50,291 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:49:50,291 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-12 15:49:50,292 INFO L427 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:49:50,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:49:50,292 INFO L82 PathProgramCache]: Analyzing trace with hash -1794009065, now seen corresponding path program 19 times [2020-10-12 15:49:50,292 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:49:50,292 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1125187821] [2020-10-12 15:49:50,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:49:50,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:49:50,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:50,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:51,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:52,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:53,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:54,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:55,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:55,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:49:55,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-12 15:49:55,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 15:49:55,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5510 [2020-10-12 15:49:55,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:49:55,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-12 15:49:55,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 15:49:55,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-12 15:49:55,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:49:56,051 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2020-10-12 15:49:56,220 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 64 [2020-10-12 15:49:56,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:49:56,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:49:56,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:56,668 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:49:56,668 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:49:56,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:49:56,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:49:56,669 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:49:56,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:49:56,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:49:56,669 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:49:56,669 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:49:56,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:49:56,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:49:56,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:57,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:49:57,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-12 15:49:57,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:49:57,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 743 [2020-10-12 15:49:57,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:49:57,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 15:49:57,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:49:57,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 15:49:57,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0