/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-properties/simple-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 15:48:34,571 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 15:48:34,575 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 15:48:34,620 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 15:48:34,620 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 15:48:34,630 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 15:48:34,632 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 15:48:34,636 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 15:48:34,639 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 15:48:34,642 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 15:48:34,642 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 15:48:34,643 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 15:48:34,644 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 15:48:34,647 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 15:48:34,650 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 15:48:34,651 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 15:48:34,653 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 15:48:34,654 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 15:48:34,656 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 15:48:34,665 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 15:48:34,667 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 15:48:34,668 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 15:48:34,669 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 15:48:34,670 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 15:48:34,684 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 15:48:34,687 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 15:48:34,687 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 15:48:34,688 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 15:48:34,689 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 15:48:34,690 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 15:48:34,690 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 15:48:34,695 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 15:48:34,696 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 15:48:34,696 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 15:48:34,697 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 15:48:34,697 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 15:48:34,698 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 15:48:34,698 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 15:48:34,698 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 15:48:34,703 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 15:48:34,704 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 15:48:34,705 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 15:48:34,741 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 15:48:34,741 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 15:48:34,743 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 15:48:34,743 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 15:48:34,743 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 15:48:34,743 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 15:48:34,744 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 15:48:34,744 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 15:48:34,744 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 15:48:34,744 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 15:48:34,744 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 15:48:34,744 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 15:48:34,745 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 15:48:34,745 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 15:48:34,745 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 15:48:34,745 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 15:48:34,745 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 15:48:34,746 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 15:48:34,746 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 15:48:34,746 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 15:48:34,746 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 15:48:34,746 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 15:48:34,746 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 15:48:34,747 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 15:48:34,747 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 15:48:34,747 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 15:48:34,747 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 15:48:34,747 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 15:48:34,748 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 15:48:34,748 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 15:48:35,084 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 15:48:35,099 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 15:48:35,102 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 15:48:35,104 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 15:48:35,105 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 15:48:35,105 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/simple-2.i [2020-10-12 15:48:35,172 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fb14d3fcb/b1a18c0d7b464482a38cb513fb4177c1/FLAGddd20587d [2020-10-12 15:48:35,667 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 15:48:35,668 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-properties/simple-2.i [2020-10-12 15:48:35,690 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fb14d3fcb/b1a18c0d7b464482a38cb513fb4177c1/FLAGddd20587d [2020-10-12 15:48:36,047 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fb14d3fcb/b1a18c0d7b464482a38cb513fb4177c1 [2020-10-12 15:48:36,056 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 15:48:36,058 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 15:48:36,059 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 15:48:36,060 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 15:48:36,064 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 15:48:36,065 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 03:48:36" (1/1) ... [2020-10-12 15:48:36,068 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c02a795 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:48:36, skipping insertion in model container [2020-10-12 15:48:36,068 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 03:48:36" (1/1) ... [2020-10-12 15:48:36,077 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 15:48:36,140 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 15:48:36,568 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 15:48:36,579 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 15:48:36,618 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 15:48:36,669 INFO L208 MainTranslator]: Completed translation [2020-10-12 15:48:36,669 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:48:36 WrapperNode [2020-10-12 15:48:36,670 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 15:48:36,670 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 15:48:36,670 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 15:48:36,671 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 15:48:36,685 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:48:36" (1/1) ... [2020-10-12 15:48:36,685 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:48:36" (1/1) ... [2020-10-12 15:48:36,701 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:48:36" (1/1) ... [2020-10-12 15:48:36,702 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:48:36" (1/1) ... [2020-10-12 15:48:36,716 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:48:36" (1/1) ... [2020-10-12 15:48:36,721 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:48:36" (1/1) ... [2020-10-12 15:48:36,724 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:48:36" (1/1) ... [2020-10-12 15:48:36,730 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 15:48:36,731 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 15:48:36,731 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 15:48:36,731 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 15:48:36,732 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:48:36" (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 15:48:36,804 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 15:48:36,805 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 15:48:36,805 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-12 15:48:36,805 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-12 15:48:36,805 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-10-12 15:48:36,805 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-10-12 15:48:36,806 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-10-12 15:48:36,807 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-10-12 15:48:36,807 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 15:48:36,807 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 15:48:36,808 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-12 15:48:36,808 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-12 15:48:36,808 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-12 15:48:36,808 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-12 15:48:36,808 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-12 15:48:36,809 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-12 15:48:36,809 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-12 15:48:36,809 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-12 15:48:36,810 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-12 15:48:36,810 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-12 15:48:36,811 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-12 15:48:36,811 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-12 15:48:36,811 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-12 15:48:36,811 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-12 15:48:36,811 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-12 15:48:36,812 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-12 15:48:36,812 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-12 15:48:36,813 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-12 15:48:36,813 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-12 15:48:36,813 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-10-12 15:48:36,813 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-10-12 15:48:36,813 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-10-12 15:48:36,813 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-12 15:48:36,813 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-12 15:48:36,813 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-12 15:48:36,814 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-12 15:48:36,814 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-12 15:48:36,814 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-12 15:48:36,814 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-12 15:48:36,814 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-12 15:48:36,814 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-12 15:48:36,815 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-12 15:48:36,815 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-12 15:48:36,815 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-12 15:48:36,816 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-12 15:48:36,817 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-12 15:48:36,817 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-12 15:48:36,817 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-12 15:48:36,817 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-12 15:48:36,817 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-12 15:48:36,818 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-12 15:48:36,819 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-12 15:48:36,819 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-12 15:48:36,819 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-12 15:48:36,819 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-12 15:48:36,819 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-12 15:48:36,820 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-12 15:48:36,820 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-12 15:48:36,820 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-12 15:48:36,820 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-12 15:48:36,821 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-12 15:48:36,821 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-12 15:48:36,821 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-12 15:48:36,822 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-12 15:48:36,822 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-12 15:48:36,822 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-12 15:48:36,822 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-12 15:48:36,823 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-12 15:48:36,823 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-12 15:48:36,824 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-12 15:48:36,824 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-12 15:48:36,825 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-12 15:48:36,826 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-12 15:48:36,826 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-12 15:48:36,826 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-12 15:48:36,826 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-12 15:48:36,826 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-12 15:48:36,826 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-12 15:48:36,826 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-12 15:48:36,826 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-12 15:48:36,827 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-12 15:48:36,827 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-12 15:48:36,827 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-12 15:48:36,827 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-12 15:48:36,827 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-12 15:48:36,827 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-12 15:48:36,827 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-12 15:48:36,828 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-12 15:48:36,828 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-12 15:48:36,828 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-12 15:48:36,828 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-12 15:48:36,828 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-12 15:48:36,828 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-12 15:48:36,828 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-12 15:48:36,828 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-12 15:48:36,829 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-12 15:48:36,829 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-12 15:48:36,829 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-12 15:48:36,829 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-12 15:48:36,829 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-12 15:48:36,829 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-12 15:48:36,829 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-12 15:48:36,829 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-12 15:48:36,830 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-12 15:48:36,830 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-12 15:48:36,830 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-12 15:48:36,830 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-12 15:48:36,830 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-12 15:48:36,830 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-12 15:48:36,830 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-12 15:48:36,830 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-12 15:48:36,830 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-12 15:48:36,830 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-12 15:48:36,830 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-12 15:48:36,831 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-12 15:48:36,831 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-12 15:48:36,831 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-12 15:48:36,831 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-12 15:48:36,831 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-10-12 15:48:36,831 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 15:48:36,832 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-12 15:48:36,832 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-12 15:48:36,832 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-12 15:48:36,832 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-12 15:48:36,832 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-12 15:48:36,832 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 15:48:36,833 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 15:48:36,833 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-12 15:48:37,161 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-10-12 15:48:37,306 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 15:48:37,306 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-12 15:48:37,316 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 03:48:37 BoogieIcfgContainer [2020-10-12 15:48:37,317 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 15:48:37,318 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 15:48:37,319 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 15:48:37,323 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 15:48:37,323 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 03:48:36" (1/3) ... [2020-10-12 15:48:37,324 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f643ad5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 03:48:37, skipping insertion in model container [2020-10-12 15:48:37,324 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:48:36" (2/3) ... [2020-10-12 15:48:37,325 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f643ad5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 03:48:37, skipping insertion in model container [2020-10-12 15:48:37,325 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 03:48:37" (3/3) ... [2020-10-12 15:48:37,327 INFO L109 eAbstractionObserver]: Analyzing ICFG simple-2.i [2020-10-12 15:48:37,340 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 15:48:37,347 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 15:48:37,364 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 15:48:37,390 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 15:48:37,391 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 15:48:37,391 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 15:48:37,391 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 15:48:37,391 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 15:48:37,392 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 15:48:37,392 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 15:48:37,392 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 15:48:37,411 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-10-12 15:48:37,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-12 15:48:37,418 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:48:37,420 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:48:37,420 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:48:37,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:48:37,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1710443637, now seen corresponding path program 1 times [2020-10-12 15:48:37,436 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:48:37,437 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2113901215] [2020-10-12 15:48:37,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:48:37,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:37,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:37,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:37,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:37,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-12 15:48:37,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 15:48:37,938 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 329 [2020-10-12 15:48:37,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:37,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 15:48:37,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:48:37,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-12 15:48:37,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 15:48:38,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:48:38,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:38,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:38,071 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:38,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:48:38,071 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:38,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 15:48:38,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:38,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:48:38,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:48:38,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:48:38,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:38,081 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 15:48:38,082 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2113901215] [2020-10-12 15:48:38,084 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:48:38,084 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 15:48:38,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157453384] [2020-10-12 15:48:38,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 15:48:38,092 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:48:38,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 15:48:38,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 15:48:38,110 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 6 states. [2020-10-12 15:48:38,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:48:38,303 INFO L93 Difference]: Finished difference Result 58 states and 75 transitions. [2020-10-12 15:48:38,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 15:48:38,305 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-10-12 15:48:38,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:48:38,314 INFO L225 Difference]: With dead ends: 58 [2020-10-12 15:48:38,314 INFO L226 Difference]: Without dead ends: 31 [2020-10-12 15:48:38,318 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-12 15:48:38,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-12 15:48:38,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2020-10-12 15:48:38,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-12 15:48:38,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-10-12 15:48:38,363 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 13 [2020-10-12 15:48:38,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:48:38,364 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-10-12 15:48:38,364 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 15:48:38,364 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-10-12 15:48:38,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-12 15:48:38,365 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:48:38,365 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:48:38,366 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 15:48:38,366 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:48:38,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:48:38,367 INFO L82 PathProgramCache]: Analyzing trace with hash 714847529, now seen corresponding path program 1 times [2020-10-12 15:48:38,367 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:48:38,367 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [952621758] [2020-10-12 15:48:38,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:48:38,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:38,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:38,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:38,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-12 15:48:38,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:38,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 98 [2020-10-12 15:48:38,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:38,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 15:48:38,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 15:48:38,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-12 15:48:38,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:38,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:48:38,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:38,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:38,595 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:38,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:48:38,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:38,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 15:48:38,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:38,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:48:38,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:48:38,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:48:38,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:48:38,607 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:48:38,608 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [952621758] [2020-10-12 15:48:38,608 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:48:38,608 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 15:48:38,609 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710178569] [2020-10-12 15:48:38,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 15:48:38,611 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:48:38,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 15:48:38,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 15:48:38,615 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 6 states. [2020-10-12 15:48:38,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:48:38,719 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2020-10-12 15:48:38,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 15:48:38,720 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-10-12 15:48:38,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:48:38,721 INFO L225 Difference]: With dead ends: 37 [2020-10-12 15:48:38,721 INFO L226 Difference]: Without dead ends: 27 [2020-10-12 15:48:38,722 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-12 15:48:38,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-12 15:48:38,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 20. [2020-10-12 15:48:38,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-12 15:48:38,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-10-12 15:48:38,728 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2020-10-12 15:48:38,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:48:38,728 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-10-12 15:48:38,728 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 15:48:38,729 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-10-12 15:48:38,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-12 15:48:38,729 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:48:38,729 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:48:38,730 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 15:48:38,730 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:48:38,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:48:38,730 INFO L82 PathProgramCache]: Analyzing trace with hash -158216428, now seen corresponding path program 1 times [2020-10-12 15:48:38,731 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:48:38,731 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1542416290] [2020-10-12 15:48:38,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:48:38,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:38,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:38,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:38,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-12 15:48:38,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:38,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 222 [2020-10-12 15:48:38,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:38,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 15:48:38,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:48:38,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-12 15:48:38,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:48:39,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:48:39,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:39,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:39,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:39,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:48:39,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:39,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 15:48:39,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:39,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:48:39,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:48:39,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:48:39,085 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:48:39,089 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 15:48:39,090 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1542416290] [2020-10-12 15:48:39,090 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:48:39,091 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 15:48:39,091 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692096291] [2020-10-12 15:48:39,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 15:48:39,092 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:48:39,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 15:48:39,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-12 15:48:39,093 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 9 states. [2020-10-12 15:48:39,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:48:39,305 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2020-10-12 15:48:39,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 15:48:39,305 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 18 [2020-10-12 15:48:39,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:48:39,306 INFO L225 Difference]: With dead ends: 37 [2020-10-12 15:48:39,307 INFO L226 Difference]: Without dead ends: 35 [2020-10-12 15:48:39,307 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-12 15:48:39,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-12 15:48:39,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 27. [2020-10-12 15:48:39,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-12 15:48:39,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-10-12 15:48:39,314 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 18 [2020-10-12 15:48:39,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:48:39,314 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-10-12 15:48:39,315 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 15:48:39,315 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-10-12 15:48:39,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-12 15:48:39,316 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:48:39,316 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:48:39,316 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 15:48:39,317 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:48:39,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:48:39,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1841664542, now seen corresponding path program 1 times [2020-10-12 15:48:39,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:48:39,318 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1968273548] [2020-10-12 15:48:39,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:48:39,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:39,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:39,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:39,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-12 15:48:39,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:39,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 178 [2020-10-12 15:48:39,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:39,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 15:48:39,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:48:39,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-12 15:48:39,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:39,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:48:39,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:39,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:39,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:39,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:48:39,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:39,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:48:39,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:39,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:48:39,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:48:39,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:48:39,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:48:39,648 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 15:48:39,649 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1968273548] [2020-10-12 15:48:39,649 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:48:39,649 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 15:48:39,649 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900575474] [2020-10-12 15:48:39,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 15:48:39,650 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:48:39,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 15:48:39,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-12 15:48:39,651 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 10 states. [2020-10-12 15:48:39,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:48:39,875 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2020-10-12 15:48:39,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 15:48:39,876 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 21 [2020-10-12 15:48:39,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:48:39,877 INFO L225 Difference]: With dead ends: 40 [2020-10-12 15:48:39,877 INFO L226 Difference]: Without dead ends: 38 [2020-10-12 15:48:39,878 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-10-12 15:48:39,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-12 15:48:39,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 30. [2020-10-12 15:48:39,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-12 15:48:39,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-10-12 15:48:39,884 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 21 [2020-10-12 15:48:39,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:48:39,885 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-10-12 15:48:39,885 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 15:48:39,885 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-10-12 15:48:39,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-12 15:48:39,886 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:48:39,886 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:48:39,886 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 15:48:39,886 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:48:39,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:48:39,887 INFO L82 PathProgramCache]: Analyzing trace with hash -2100679301, now seen corresponding path program 2 times [2020-10-12 15:48:39,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:48:39,888 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [666429619] [2020-10-12 15:48:39,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:48:39,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:39,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:40,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:40,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-12 15:48:40,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:40,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 283 [2020-10-12 15:48:40,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:40,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 15:48:40,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:48:40,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 15:48:40,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:40,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:48:40,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:40,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:40,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:40,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:48:40,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:40,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 15:48:40,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:40,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:48:40,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:48:40,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:48:40,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:40,324 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 15:48:40,325 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [666429619] [2020-10-12 15:48:40,325 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:48:40,325 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 15:48:40,325 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717043871] [2020-10-12 15:48:40,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 15:48:40,326 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:48:40,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 15:48:40,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-12 15:48:40,327 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 11 states. [2020-10-12 15:48:40,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:48:40,468 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2020-10-12 15:48:40,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 15:48:40,469 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 22 [2020-10-12 15:48:40,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:48:40,470 INFO L225 Difference]: With dead ends: 35 [2020-10-12 15:48:40,470 INFO L226 Difference]: Without dead ends: 33 [2020-10-12 15:48:40,471 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2020-10-12 15:48:40,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-12 15:48:40,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2020-10-12 15:48:40,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-12 15:48:40,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-10-12 15:48:40,478 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 22 [2020-10-12 15:48:40,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:48:40,478 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-10-12 15:48:40,478 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 15:48:40,478 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-10-12 15:48:40,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-12 15:48:40,479 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:48:40,479 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:48:40,480 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 15:48:40,480 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:48:40,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:48:40,480 INFO L82 PathProgramCache]: Analyzing trace with hash -1111313324, now seen corresponding path program 2 times [2020-10-12 15:48:40,481 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:48:40,481 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [270087451] [2020-10-12 15:48:40,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:48:40,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:40,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:40,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:40,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-12 15:48:40,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:40,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 168 [2020-10-12 15:48:40,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:40,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 15:48:40,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:48:40,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 15:48:40,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:40,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:48:40,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:40,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:40,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:40,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:48:40,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:40,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 15:48:40,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:40,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:48:40,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:48:40,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:48:40,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:40,907 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:48:40,908 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [270087451] [2020-10-12 15:48:40,908 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:48:40,908 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 15:48:40,908 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886457874] [2020-10-12 15:48:40,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 15:48:40,909 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:48:40,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 15:48:40,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-12 15:48:40,910 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 10 states. [2020-10-12 15:48:41,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:48:41,127 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2020-10-12 15:48:41,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 15:48:41,127 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2020-10-12 15:48:41,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:48:41,128 INFO L225 Difference]: With dead ends: 42 [2020-10-12 15:48:41,128 INFO L226 Difference]: Without dead ends: 29 [2020-10-12 15:48:41,129 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-10-12 15:48:41,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-12 15:48:41,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2020-10-12 15:48:41,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-12 15:48:41,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-10-12 15:48:41,134 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 24 [2020-10-12 15:48:41,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:48:41,134 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-10-12 15:48:41,135 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 15:48:41,135 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-10-12 15:48:41,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-12 15:48:41,135 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:48:41,136 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:48:41,136 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 15:48:41,136 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:48:41,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:48:41,137 INFO L82 PathProgramCache]: Analyzing trace with hash 636232219, now seen corresponding path program 3 times [2020-10-12 15:48:41,137 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:48:41,137 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [360692853] [2020-10-12 15:48:41,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:48:41,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:41,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:41,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:41,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-12 15:48:41,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:41,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 240 [2020-10-12 15:48:41,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:41,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 15:48:41,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:48:41,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 15:48:41,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:48:41,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:48:41,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:41,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:41,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:41,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:48:41,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:41,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 15:48:41,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:41,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:48:41,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:48:41,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:48:41,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:48:41,646 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:48:41,646 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [360692853] [2020-10-12 15:48:41,647 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:48:41,647 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 15:48:41,648 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476923205] [2020-10-12 15:48:41,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 15:48:41,649 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:48:41,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 15:48:41,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-12 15:48:41,650 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 12 states. [2020-10-12 15:48:41,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:48:41,991 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2020-10-12 15:48:41,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 15:48:41,992 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 25 [2020-10-12 15:48:41,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:48:41,993 INFO L225 Difference]: With dead ends: 42 [2020-10-12 15:48:41,993 INFO L226 Difference]: Without dead ends: 40 [2020-10-12 15:48:41,993 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2020-10-12 15:48:41,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-12 15:48:41,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2020-10-12 15:48:41,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-12 15:48:41,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-10-12 15:48:41,999 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 25 [2020-10-12 15:48:41,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:48:42,000 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-10-12 15:48:42,000 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 15:48:42,000 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-10-12 15:48:42,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-12 15:48:42,001 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:48:42,001 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:48:42,001 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 15:48:42,001 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:48:42,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:48:42,002 INFO L82 PathProgramCache]: Analyzing trace with hash 308177275, now seen corresponding path program 4 times [2020-10-12 15:48:42,002 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:48:42,002 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1203371485] [2020-10-12 15:48:42,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:48:42,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:42,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:42,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:42,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-12 15:48:42,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:42,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 296 [2020-10-12 15:48:42,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:42,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 15:48:42,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:48:42,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 15:48:42,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:42,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:48:42,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:42,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:42,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:42,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:48:42,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:42,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 15:48:42,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:42,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:48:42,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:48:42,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:48:42,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:42,620 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:48:42,620 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1203371485] [2020-10-12 15:48:42,620 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:48:42,621 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 15:48:42,621 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989051491] [2020-10-12 15:48:42,621 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 15:48:42,622 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:48:42,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 15:48:42,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-12 15:48:42,623 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 13 states. [2020-10-12 15:48:43,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:48:43,015 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2020-10-12 15:48:43,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 15:48:43,016 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 28 [2020-10-12 15:48:43,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:48:43,017 INFO L225 Difference]: With dead ends: 45 [2020-10-12 15:48:43,017 INFO L226 Difference]: Without dead ends: 43 [2020-10-12 15:48:43,018 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2020-10-12 15:48:43,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-12 15:48:43,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 37. [2020-10-12 15:48:43,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-12 15:48:43,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2020-10-12 15:48:43,024 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 28 [2020-10-12 15:48:43,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:48:43,025 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2020-10-12 15:48:43,025 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 15:48:43,025 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2020-10-12 15:48:43,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-12 15:48:43,026 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:48:43,026 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:48:43,026 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 15:48:43,026 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:48:43,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:48:43,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1690767828, now seen corresponding path program 5 times [2020-10-12 15:48:43,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:48:43,027 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1960102821] [2020-10-12 15:48:43,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:48:43,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:43,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:43,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:43,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-12 15:48:43,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:43,464 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 415 [2020-10-12 15:48:43,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:43,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 15:48:43,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:48:43,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 15:48:43,465 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:48:44,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:48:44,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:44,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:44,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:44,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:48:44,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:44,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 15:48:44,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:44,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:48:44,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:48:44,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:48:44,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:44,178 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 15:48:44,185 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1960102821] [2020-10-12 15:48:44,186 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:48:44,186 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 15:48:44,187 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839746986] [2020-10-12 15:48:44,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 15:48:44,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:48:44,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 15:48:44,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-10-12 15:48:44,189 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 14 states. [2020-10-12 15:48:45,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:48:45,097 INFO L93 Difference]: Finished difference Result 55 states and 58 transitions. [2020-10-12 15:48:45,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 15:48:45,097 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 29 [2020-10-12 15:48:45,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:48:45,099 INFO L225 Difference]: With dead ends: 55 [2020-10-12 15:48:45,099 INFO L226 Difference]: Without dead ends: 53 [2020-10-12 15:48:45,100 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2020-10-12 15:48:45,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-12 15:48:45,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 42. [2020-10-12 15:48:45,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-12 15:48:45,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2020-10-12 15:48:45,117 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 29 [2020-10-12 15:48:45,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:48:45,117 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2020-10-12 15:48:45,118 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 15:48:45,118 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2020-10-12 15:48:45,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-12 15:48:45,124 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:48:45,124 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:48:45,125 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 15:48:45,125 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:48:45,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:48:45,126 INFO L82 PathProgramCache]: Analyzing trace with hash -1726061029, now seen corresponding path program 6 times [2020-10-12 15:48:45,128 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:48:45,129 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1576491221] [2020-10-12 15:48:45,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:48:45,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:45,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:45,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:45,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-12 15:48:45,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:45,568 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 411 [2020-10-12 15:48:45,568 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:45,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 15:48:45,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:48:45,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 15:48:45,569 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:45,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:48:45,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:45,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:45,916 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:45,916 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:48:45,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:45,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:48:45,917 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:45,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:48:45,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:48:45,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:48:45,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:45,926 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:48:45,927 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1576491221] [2020-10-12 15:48:45,927 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:48:45,927 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 15:48:45,927 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527227830] [2020-10-12 15:48:45,928 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 15:48:45,928 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:48:45,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 15:48:45,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-10-12 15:48:45,929 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand 13 states. [2020-10-12 15:48:46,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:48:46,274 INFO L93 Difference]: Finished difference Result 57 states and 60 transitions. [2020-10-12 15:48:46,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 15:48:46,275 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 31 [2020-10-12 15:48:46,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:48:46,275 INFO L225 Difference]: With dead ends: 57 [2020-10-12 15:48:46,276 INFO L226 Difference]: Without dead ends: 41 [2020-10-12 15:48:46,276 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2020-10-12 15:48:46,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-12 15:48:46,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2020-10-12 15:48:46,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-12 15:48:46,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2020-10-12 15:48:46,281 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 31 [2020-10-12 15:48:46,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:48:46,282 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2020-10-12 15:48:46,282 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 15:48:46,282 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2020-10-12 15:48:46,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-12 15:48:46,283 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:48:46,283 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:48:46,283 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 15:48:46,283 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:48:46,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:48:46,284 INFO L82 PathProgramCache]: Analyzing trace with hash -1707265246, now seen corresponding path program 7 times [2020-10-12 15:48:46,284 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:48:46,284 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2094544101] [2020-10-12 15:48:46,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:48:46,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:46,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:46,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:46,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-12 15:48:46,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:46,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 495 [2020-10-12 15:48:46,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:46,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 15:48:46,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:48:46,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 15:48:46,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:47,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:48:47,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:47,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:47,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:47,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:48:47,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:47,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:48:47,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:47,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:48:47,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:48:47,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:48:47,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:47,267 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:48:47,268 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2094544101] [2020-10-12 15:48:47,268 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:48:47,268 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 15:48:47,269 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181591766] [2020-10-12 15:48:47,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 15:48:47,269 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:48:47,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 15:48:47,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2020-10-12 15:48:47,270 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 15 states. [2020-10-12 15:48:47,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:48:47,985 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2020-10-12 15:48:47,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 15:48:47,985 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 32 [2020-10-12 15:48:47,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:48:47,986 INFO L225 Difference]: With dead ends: 49 [2020-10-12 15:48:47,987 INFO L226 Difference]: Without dead ends: 47 [2020-10-12 15:48:47,987 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2020-10-12 15:48:47,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-12 15:48:47,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 41. [2020-10-12 15:48:47,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-12 15:48:47,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2020-10-12 15:48:47,994 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 32 [2020-10-12 15:48:47,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:48:47,994 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2020-10-12 15:48:47,994 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 15:48:47,994 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2020-10-12 15:48:47,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-12 15:48:47,995 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:48:47,995 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:48:47,995 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 15:48:47,995 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:48:47,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:48:47,996 INFO L82 PathProgramCache]: Analyzing trace with hash -658408179, now seen corresponding path program 8 times [2020-10-12 15:48:47,996 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:48:47,996 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1438341459] [2020-10-12 15:48:47,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:48:48,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:48,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:48,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:48,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-12 15:48:48,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:48,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 386 [2020-10-12 15:48:48,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:48,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 15:48:48,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:48:48,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 15:48:48,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:48:48,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:48:48,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:48,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:48,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:48,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:48:48,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:48,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 15:48:48,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:48,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:48:48,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:48:48,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:48:48,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:48,974 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:48:48,974 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1438341459] [2020-10-12 15:48:48,974 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:48:48,975 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 15:48:48,975 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562919045] [2020-10-12 15:48:48,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 15:48:48,976 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:48:48,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 15:48:48,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2020-10-12 15:48:48,977 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 16 states. [2020-10-12 15:48:49,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:48:49,637 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2020-10-12 15:48:49,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 15:48:49,638 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 33 [2020-10-12 15:48:49,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:48:49,639 INFO L225 Difference]: With dead ends: 49 [2020-10-12 15:48:49,639 INFO L226 Difference]: Without dead ends: 47 [2020-10-12 15:48:49,640 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2020-10-12 15:48:49,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-12 15:48:49,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 41. [2020-10-12 15:48:49,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-12 15:48:49,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2020-10-12 15:48:49,651 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 33 [2020-10-12 15:48:49,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:48:49,651 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2020-10-12 15:48:49,651 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 15:48:49,652 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2020-10-12 15:48:49,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-12 15:48:49,653 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:48:49,653 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:48:49,654 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 15:48:49,654 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:48:49,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:48:49,654 INFO L82 PathProgramCache]: Analyzing trace with hash -131406060, now seen corresponding path program 9 times [2020-10-12 15:48:49,654 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:48:49,655 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [229356441] [2020-10-12 15:48:49,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:48:49,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:49,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:50,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:50,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-12 15:48:50,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:50,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 426 [2020-10-12 15:48:50,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:50,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 15:48:50,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:48:50,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-12 15:48:50,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:50,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:48:50,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:50,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:50,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:50,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:48:50,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:50,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:48:50,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:50,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:48:50,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:48:50,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:48:50,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:50,672 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:48:50,673 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [229356441] [2020-10-12 15:48:50,673 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:48:50,673 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 15:48:50,673 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450841136] [2020-10-12 15:48:50,674 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 15:48:50,674 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:48:50,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 15:48:50,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2020-10-12 15:48:50,677 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 16 states. [2020-10-12 15:48:51,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:48:51,533 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2020-10-12 15:48:51,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 15:48:51,534 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 35 [2020-10-12 15:48:51,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:48:51,534 INFO L225 Difference]: With dead ends: 54 [2020-10-12 15:48:51,534 INFO L226 Difference]: Without dead ends: 52 [2020-10-12 15:48:51,535 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=97, Invalid=659, Unknown=0, NotChecked=0, Total=756 [2020-10-12 15:48:51,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-12 15:48:51,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 44. [2020-10-12 15:48:51,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-12 15:48:51,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2020-10-12 15:48:51,542 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 35 [2020-10-12 15:48:51,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:48:51,542 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2020-10-12 15:48:51,542 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 15:48:51,543 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2020-10-12 15:48:51,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-12 15:48:51,543 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:48:51,543 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:48:51,543 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 15:48:51,544 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:48:51,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:48:51,544 INFO L82 PathProgramCache]: Analyzing trace with hash 482398537, now seen corresponding path program 10 times [2020-10-12 15:48:51,544 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:48:51,544 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1840814506] [2020-10-12 15:48:51,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:48:51,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:51,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:52,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:52,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-12 15:48:52,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:52,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 464 [2020-10-12 15:48:52,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:52,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 15:48:52,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:48:52,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 15:48:52,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:52,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:48:52,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:52,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:52,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:52,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:48:52,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:52,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:48:52,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:52,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:48:52,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:48:52,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:48:52,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:52,632 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:48:52,633 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1840814506] [2020-10-12 15:48:52,633 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:48:52,633 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 15:48:52,633 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758226317] [2020-10-12 15:48:52,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 15:48:52,634 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:48:52,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 15:48:52,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2020-10-12 15:48:52,635 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 17 states. [2020-10-12 15:48:53,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:48:53,418 INFO L93 Difference]: Finished difference Result 55 states and 57 transitions. [2020-10-12 15:48:53,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 15:48:53,419 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 36 [2020-10-12 15:48:53,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:48:53,419 INFO L225 Difference]: With dead ends: 55 [2020-10-12 15:48:53,419 INFO L226 Difference]: Without dead ends: 53 [2020-10-12 15:48:53,420 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2020-10-12 15:48:53,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-12 15:48:53,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 44. [2020-10-12 15:48:53,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-12 15:48:53,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2020-10-12 15:48:53,427 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 36 [2020-10-12 15:48:53,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:48:53,427 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2020-10-12 15:48:53,427 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 15:48:53,427 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2020-10-12 15:48:53,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-12 15:48:53,430 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:48:53,430 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:48:53,430 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 15:48:53,430 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:48:53,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:48:53,431 INFO L82 PathProgramCache]: Analyzing trace with hash -1997908510, now seen corresponding path program 11 times [2020-10-12 15:48:53,431 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:48:53,431 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [121251270] [2020-10-12 15:48:53,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:48:53,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:53,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:53,885 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:53,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-12 15:48:53,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:53,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 434 [2020-10-12 15:48:53,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:53,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 15:48:53,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:48:53,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 15:48:53,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:54,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:48:54,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:54,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:54,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:54,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:48:54,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:54,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:48:54,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:54,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:48:54,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:48:54,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:48:54,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:54,509 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:48:54,510 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [121251270] [2020-10-12 15:48:54,510 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:48:54,510 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 15:48:54,510 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871758370] [2020-10-12 15:48:54,510 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 15:48:54,511 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:48:54,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 15:48:54,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2020-10-12 15:48:54,511 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand 16 states. [2020-10-12 15:48:55,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:48:55,097 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2020-10-12 15:48:55,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 15:48:55,097 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 38 [2020-10-12 15:48:55,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:48:55,098 INFO L225 Difference]: With dead ends: 61 [2020-10-12 15:48:55,098 INFO L226 Difference]: Without dead ends: 42 [2020-10-12 15:48:55,099 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2020-10-12 15:48:55,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-12 15:48:55,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2020-10-12 15:48:55,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-12 15:48:55,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2020-10-12 15:48:55,113 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 38 [2020-10-12 15:48:55,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:48:55,114 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2020-10-12 15:48:55,114 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 15:48:55,114 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2020-10-12 15:48:55,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-12 15:48:55,115 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:48:55,115 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:48:55,117 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 15:48:55,117 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:48:55,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:48:55,118 INFO L82 PathProgramCache]: Analyzing trace with hash 179061645, now seen corresponding path program 12 times [2020-10-12 15:48:55,118 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:48:55,119 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [989699644] [2020-10-12 15:48:55,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:48:55,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:55,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:55,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:55,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-12 15:48:55,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:55,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 529 [2020-10-12 15:48:55,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:55,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 15:48:55,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:48:55,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-12 15:48:55,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:56,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:48:56,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:56,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:56,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:56,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:48:56,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:56,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:48:56,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:56,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:48:56,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:48:56,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:48:56,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:56,602 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:48:56,602 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [989699644] [2020-10-12 15:48:56,603 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:48:56,603 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 15:48:56,603 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623371865] [2020-10-12 15:48:56,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 15:48:56,604 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:48:56,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 15:48:56,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2020-10-12 15:48:56,604 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 18 states. [2020-10-12 15:48:57,446 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 73 [2020-10-12 15:48:57,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:48:57,893 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2020-10-12 15:48:57,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 15:48:57,893 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 39 [2020-10-12 15:48:57,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:48:57,894 INFO L225 Difference]: With dead ends: 61 [2020-10-12 15:48:57,895 INFO L226 Difference]: Without dead ends: 59 [2020-10-12 15:48:57,896 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2020-10-12 15:48:57,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-12 15:48:57,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 48. [2020-10-12 15:48:57,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-12 15:48:57,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2020-10-12 15:48:57,903 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 39 [2020-10-12 15:48:57,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:48:57,903 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2020-10-12 15:48:57,903 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 15:48:57,903 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2020-10-12 15:48:57,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-12 15:48:57,904 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:48:57,904 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:48:57,904 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 15:48:57,905 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:48:57,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:48:57,905 INFO L82 PathProgramCache]: Analyzing trace with hash 80902857, now seen corresponding path program 13 times [2020-10-12 15:48:57,905 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:48:57,905 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [970038446] [2020-10-12 15:48:57,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:48:57,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:57,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:58,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:58,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-12 15:48:58,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:58,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 543 [2020-10-12 15:48:58,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:58,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 15:48:58,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:48:58,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-12 15:48:58,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:59,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:48:59,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:48:59,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:48:59,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:48:59,474 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:48:59,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:48:59,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:48:59,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:48:59,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:48:59,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:48:59,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:48:59,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:48:59,497 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:48:59,498 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [970038446] [2020-10-12 15:48:59,498 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:48:59,498 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 15:48:59,498 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534632517] [2020-10-12 15:48:59,499 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 15:48:59,499 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:48:59,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 15:48:59,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2020-10-12 15:48:59,500 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 19 states. [2020-10-12 15:49:00,086 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 68 [2020-10-12 15:49:00,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:49:00,634 INFO L93 Difference]: Finished difference Result 64 states and 66 transitions. [2020-10-12 15:49:00,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 15:49:00,634 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 42 [2020-10-12 15:49:00,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:49:00,635 INFO L225 Difference]: With dead ends: 64 [2020-10-12 15:49:00,635 INFO L226 Difference]: Without dead ends: 62 [2020-10-12 15:49:00,636 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2020-10-12 15:49:00,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-12 15:49:00,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 51. [2020-10-12 15:49:00,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-12 15:49:00,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2020-10-12 15:49:00,642 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 42 [2020-10-12 15:49:00,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:49:00,643 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2020-10-12 15:49:00,643 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 15:49:00,643 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2020-10-12 15:49:00,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-12 15:49:00,644 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:49:00,644 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:49:00,644 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 15:49:00,644 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:49:00,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:49:00,645 INFO L82 PathProgramCache]: Analyzing trace with hash 197704582, now seen corresponding path program 14 times [2020-10-12 15:49:00,645 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:49:00,645 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [450477653] [2020-10-12 15:49:00,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:49:00,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:49:00,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:01,394 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:49:01,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-12 15:49:01,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:49:01,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 716 [2020-10-12 15:49:01,395 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:49:01,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 15:49:01,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:49:01,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-12 15:49:01,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:49:01,854 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2020-10-12 15:49:02,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:49:02,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:49:02,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:02,410 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:49:02,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:49:02,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:49:02,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 15:49:02,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:49:02,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:49:02,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:49:02,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:49:02,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:49:02,433 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:49:02,437 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [450477653] [2020-10-12 15:49:02,437 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:49:02,438 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-12 15:49:02,438 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274596179] [2020-10-12 15:49:02,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 15:49:02,441 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:49:02,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 15:49:02,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2020-10-12 15:49:02,443 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 20 states. [2020-10-12 15:49:02,941 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 71 [2020-10-12 15:49:03,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:49:03,306 INFO L93 Difference]: Finished difference Result 65 states and 67 transitions. [2020-10-12 15:49:03,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 15:49:03,306 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 43 [2020-10-12 15:49:03,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:49:03,307 INFO L225 Difference]: With dead ends: 65 [2020-10-12 15:49:03,307 INFO L226 Difference]: Without dead ends: 63 [2020-10-12 15:49:03,309 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=103, Invalid=709, Unknown=0, NotChecked=0, Total=812 [2020-10-12 15:49:03,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-12 15:49:03,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 51. [2020-10-12 15:49:03,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-12 15:49:03,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2020-10-12 15:49:03,317 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 43 [2020-10-12 15:49:03,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:49:03,318 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2020-10-12 15:49:03,318 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 15:49:03,319 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2020-10-12 15:49:03,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-12 15:49:03,319 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:49:03,319 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:49:03,319 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 15:49:03,320 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:49:03,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:49:03,320 INFO L82 PathProgramCache]: Analyzing trace with hash 705178125, now seen corresponding path program 15 times [2020-10-12 15:49:03,320 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:49:03,320 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [183546944] [2020-10-12 15:49:03,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:49:03,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:49:03,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:04,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:49:04,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-12 15:49:04,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:49:04,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 746 [2020-10-12 15:49:04,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:49:04,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 15:49:04,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:49:04,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-12 15:49:04,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:49:05,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:49:05,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:49:05,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:05,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:49:05,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:49:05,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:49:05,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:49:05,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:49:05,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:49:05,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:49:05,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:49:05,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:49:05,067 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 5 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:49:05,067 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [183546944] [2020-10-12 15:49:05,067 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:49:05,067 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 15:49:05,067 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700163668] [2020-10-12 15:49:05,068 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 15:49:05,068 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:49:05,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 15:49:05,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2020-10-12 15:49:05,069 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 19 states. [2020-10-12 15:49:05,632 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 65 [2020-10-12 15:49:06,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:49:06,141 INFO L93 Difference]: Finished difference Result 71 states and 73 transitions. [2020-10-12 15:49:06,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 15:49:06,141 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 45 [2020-10-12 15:49:06,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:49:06,142 INFO L225 Difference]: With dead ends: 71 [2020-10-12 15:49:06,142 INFO L226 Difference]: Without dead ends: 49 [2020-10-12 15:49:06,144 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=86, Invalid=726, Unknown=0, NotChecked=0, Total=812 [2020-10-12 15:49:06,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-12 15:49:06,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2020-10-12 15:49:06,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-12 15:49:06,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2020-10-12 15:49:06,151 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 45 [2020-10-12 15:49:06,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:49:06,151 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2020-10-12 15:49:06,151 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 15:49:06,151 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2020-10-12 15:49:06,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-12 15:49:06,152 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:49:06,152 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:49:06,152 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-12 15:49:06,152 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:49:06,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:49:06,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1421857840, now seen corresponding path program 16 times [2020-10-12 15:49:06,153 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:49:06,153 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1689320330] [2020-10-12 15:49:06,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:49:06,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:49:06,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:07,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:49:07,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-12 15:49:07,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:49:07,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 801 [2020-10-12 15:49:07,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:49:07,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 15:49:07,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:49:07,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-12 15:49:07,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:49:07,411 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2020-10-12 15:49:08,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:49:08,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:49:08,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:08,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:49:08,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:49:08,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:49:08,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:49:08,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:49:08,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:49:08,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:49:08,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:49:08,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:49:08,055 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:49:08,055 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1689320330] [2020-10-12 15:49:08,055 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:49:08,055 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 15:49:08,056 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847665095] [2020-10-12 15:49:08,056 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 15:49:08,056 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:49:08,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 15:49:08,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=374, Unknown=0, NotChecked=0, Total=420 [2020-10-12 15:49:08,057 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 21 states. [2020-10-12 15:49:08,956 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 79 [2020-10-12 15:49:09,415 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 85 [2020-10-12 15:49:10,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:49:10,036 INFO L93 Difference]: Finished difference Result 71 states and 73 transitions. [2020-10-12 15:49:10,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-12 15:49:10,037 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 46 [2020-10-12 15:49:10,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:49:10,038 INFO L225 Difference]: With dead ends: 71 [2020-10-12 15:49:10,038 INFO L226 Difference]: Without dead ends: 69 [2020-10-12 15:49:10,040 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=131, Invalid=1129, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 15:49:10,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-12 15:49:10,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 55. [2020-10-12 15:49:10,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-12 15:49:10,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2020-10-12 15:49:10,049 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 46 [2020-10-12 15:49:10,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:49:10,049 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2020-10-12 15:49:10,049 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 15:49:10,049 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2020-10-12 15:49:10,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-12 15:49:10,050 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:49:10,050 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:49:10,050 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-12 15:49:10,050 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:49:10,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:49:10,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1604256582, now seen corresponding path program 17 times [2020-10-12 15:49:10,051 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:49:10,051 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1631726231] [2020-10-12 15:49:10,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:49:10,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:49:10,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:11,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:49:11,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-12 15:49:11,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:49:11,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1282 [2020-10-12 15:49:11,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:49:11,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 15:49:11,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:49:11,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-12 15:49:11,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:49:12,043 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2020-10-12 15:49:12,331 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 64 [2020-10-12 15:49:13,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:49:13,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:49:13,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:13,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:49:13,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:49:13,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:49:13,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:49:13,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:49:13,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:49:13,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:49:13,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:49:13,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:49:13,091 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:49:13,092 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1631726231] [2020-10-12 15:49:13,092 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:49:13,092 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-12 15:49:13,092 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377956426] [2020-10-12 15:49:13,092 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-12 15:49:13,093 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:49:13,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-12 15:49:13,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=413, Unknown=0, NotChecked=0, Total=462 [2020-10-12 15:49:13,093 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand 22 states. [2020-10-12 15:49:13,827 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2020-10-12 15:49:14,187 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 79 [2020-10-12 15:49:14,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:49:14,947 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2020-10-12 15:49:14,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 15:49:14,948 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 49 [2020-10-12 15:49:14,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:49:14,949 INFO L225 Difference]: With dead ends: 74 [2020-10-12 15:49:14,950 INFO L226 Difference]: Without dead ends: 72 [2020-10-12 15:49:14,951 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=136, Invalid=1270, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 15:49:14,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-12 15:49:14,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 58. [2020-10-12 15:49:14,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-12 15:49:14,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2020-10-12 15:49:14,958 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 49 [2020-10-12 15:49:14,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:49:14,958 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2020-10-12 15:49:14,958 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-12 15:49:14,958 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2020-10-12 15:49:14,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-12 15:49:14,959 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:49:14,959 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:49:14,959 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-12 15:49:14,959 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:49:14,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:49:14,959 INFO L82 PathProgramCache]: Analyzing trace with hash -771481065, now seen corresponding path program 18 times [2020-10-12 15:49:14,960 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:49:14,960 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1384764906] [2020-10-12 15:49:14,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:49:15,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:49:15,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:15,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:49:15,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-12 15:49:15,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:49:15,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 910 [2020-10-12 15:49:15,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:49:15,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 15:49:15,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:49:15,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-12 15:49:15,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:49:16,416 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 63 [2020-10-12 15:49:16,612 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2020-10-12 15:49:16,914 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2020-10-12 15:49:17,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:49:17,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:49:17,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:17,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:49:17,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:49:17,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:49:17,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:49:17,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:49:17,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:49:17,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:49:17,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:49:17,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:49:17,341 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:49:17,342 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1384764906] [2020-10-12 15:49:17,342 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:49:17,342 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-12 15:49:17,342 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561853991] [2020-10-12 15:49:17,342 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-12 15:49:17,342 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:49:17,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-12 15:49:17,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2020-10-12 15:49:17,343 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand 23 states. [2020-10-12 15:49:18,168 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 67 [2020-10-12 15:49:18,531 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 75 [2020-10-12 15:49:18,865 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 80 [2020-10-12 15:49:19,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:49:19,547 INFO L93 Difference]: Finished difference Result 91 states and 94 transitions. [2020-10-12 15:49:19,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-12 15:49:19,550 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 50 [2020-10-12 15:49:19,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:49:19,551 INFO L225 Difference]: With dead ends: 91 [2020-10-12 15:49:19,551 INFO L226 Difference]: Without dead ends: 89 [2020-10-12 15:49:19,552 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=162, Invalid=1478, Unknown=0, NotChecked=0, Total=1640 [2020-10-12 15:49:19,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-12 15:49:19,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 63. [2020-10-12 15:49:19,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-12 15:49:19,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2020-10-12 15:49:19,560 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 50 [2020-10-12 15:49:19,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:49:19,560 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2020-10-12 15:49:19,560 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-12 15:49:19,560 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2020-10-12 15:49:19,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-12 15:49:19,561 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:49:19,561 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:49:19,561 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-12 15:49:19,561 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:49:19,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:49:19,562 INFO L82 PathProgramCache]: Analyzing trace with hash -1983417232, now seen corresponding path program 19 times [2020-10-12 15:49:19,562 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:49:19,562 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [855242285] [2020-10-12 15:49:19,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:49:19,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:49:19,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:20,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:49:20,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-12 15:49:20,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:49:20,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 826 [2020-10-12 15:49:20,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:49:20,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 15:49:20,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:49:20,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-12 15:49:20,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:49:21,124 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 59 [2020-10-12 15:49:21,370 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 55 [2020-10-12 15:49:21,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:49:21,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:49:21,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:21,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:49:21,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:49:21,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:49:21,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:49:21,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:49:21,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:49:21,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:49:21,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:49:21,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:49:21,947 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 6 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:49:21,948 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [855242285] [2020-10-12 15:49:21,948 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:49:21,948 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-12 15:49:21,948 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806139421] [2020-10-12 15:49:21,949 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-12 15:49:21,949 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:49:21,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-12 15:49:21,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2020-10-12 15:49:21,949 INFO L87 Difference]: Start difference. First operand 63 states and 66 transitions. Second operand 22 states. [2020-10-12 15:49:22,410 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 75 [2020-10-12 15:49:23,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:49:23,031 INFO L93 Difference]: Finished difference Result 87 states and 90 transitions. [2020-10-12 15:49:23,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 15:49:23,032 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 52 [2020-10-12 15:49:23,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:49:23,033 INFO L225 Difference]: With dead ends: 87 [2020-10-12 15:49:23,033 INFO L226 Difference]: Without dead ends: 62 [2020-10-12 15:49:23,035 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=92, Invalid=838, Unknown=0, NotChecked=0, Total=930 [2020-10-12 15:49:23,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-12 15:49:23,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 59. [2020-10-12 15:49:23,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-12 15:49:23,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2020-10-12 15:49:23,042 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 52 [2020-10-12 15:49:23,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:49:23,042 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2020-10-12 15:49:23,042 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-12 15:49:23,042 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2020-10-12 15:49:23,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-12 15:49:23,043 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:49:23,043 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:49:23,043 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-12 15:49:23,044 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:49:23,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:49:23,044 INFO L82 PathProgramCache]: Analyzing trace with hash -817588225, now seen corresponding path program 20 times [2020-10-12 15:49:23,044 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:49:23,044 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [698316894] [2020-10-12 15:49:23,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:49:23,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:49:23,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:24,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:49:24,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-12 15:49:24,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:49:24,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 981 [2020-10-12 15:49:24,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:49:24,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-12 15:49:24,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:49:24,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-12 15:49:24,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:49:24,661 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-10-12 15:49:24,981 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 65 [2020-10-12 15:49:25,162 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 62 [2020-10-12 15:49:25,572 WARN L193 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 79 [2020-10-12 15:49:25,782 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 74 [2020-10-12 15:49:26,045 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 73 [2020-10-12 15:49:26,228 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2020-10-12 15:49:26,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:49:26,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:49:26,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:26,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:49:26,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:49:26,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:49:26,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:49:26,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:49:26,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:49:26,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:49:26,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:49:26,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:49:26,709 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:49:26,709 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [698316894] [2020-10-12 15:49:26,709 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:49:26,709 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-12 15:49:26,709 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448808532] [2020-10-12 15:49:26,710 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-12 15:49:26,710 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:49:26,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-12 15:49:26,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=501, Unknown=0, NotChecked=0, Total=552 [2020-10-12 15:49:26,710 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 24 states. [2020-10-12 15:49:27,407 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2020-10-12 15:49:27,784 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 68 [2020-10-12 15:49:27,989 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2020-10-12 15:49:28,262 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2020-10-12 15:49:28,461 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2020-10-12 15:49:28,857 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 105 [2020-10-12 15:49:29,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:49:29,764 INFO L93 Difference]: Finished difference Result 78 states and 80 transitions. [2020-10-12 15:49:29,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 15:49:29,766 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 53 [2020-10-12 15:49:29,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:49:29,767 INFO L225 Difference]: With dead ends: 78 [2020-10-12 15:49:29,767 INFO L226 Difference]: Without dead ends: 76 [2020-10-12 15:49:29,768 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=166, Invalid=1814, Unknown=0, NotChecked=0, Total=1980 [2020-10-12 15:49:29,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-12 15:49:29,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 62. [2020-10-12 15:49:29,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-12 15:49:29,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2020-10-12 15:49:29,777 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 53 [2020-10-12 15:49:29,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:49:29,777 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2020-10-12 15:49:29,777 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-12 15:49:29,777 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2020-10-12 15:49:29,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-12 15:49:29,778 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:49:29,778 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:49:29,778 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-12 15:49:29,778 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:49:29,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:49:29,778 INFO L82 PathProgramCache]: Analyzing trace with hash 1460741246, now seen corresponding path program 21 times [2020-10-12 15:49:29,779 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:49:29,779 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1365965056] [2020-10-12 15:49:29,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:49:29,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:49:29,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:31,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:49:31,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-12 15:49:31,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:49:31,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1218 [2020-10-12 15:49:31,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:49:31,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-12 15:49:31,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:49:31,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-12 15:49:31,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:49:31,861 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 59 [2020-10-12 15:49:32,072 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 63 [2020-10-12 15:49:32,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:49:32,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:49:32,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:32,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:49:32,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:49:32,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:49:32,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 15:49:32,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:49:32,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:49:32,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:49:32,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:49:32,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:49:32,872 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 0 proven. 124 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:49:32,873 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1365965056] [2020-10-12 15:49:32,873 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:49:32,873 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-12 15:49:32,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594552539] [2020-10-12 15:49:32,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-12 15:49:32,873 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:49:32,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-12 15:49:32,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2020-10-12 15:49:32,874 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 25 states. [2020-10-12 15:49:33,649 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 79 [2020-10-12 15:49:33,933 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 84 [2020-10-12 15:49:34,212 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 77 [2020-10-12 15:49:34,521 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 82 [2020-10-12 15:49:35,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:49:35,035 INFO L93 Difference]: Finished difference Result 79 states and 81 transitions. [2020-10-12 15:49:35,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-12 15:49:35,035 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 54 [2020-10-12 15:49:35,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:49:35,036 INFO L225 Difference]: With dead ends: 79 [2020-10-12 15:49:35,037 INFO L226 Difference]: Without dead ends: 77 [2020-10-12 15:49:35,038 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=164, Invalid=1318, Unknown=0, NotChecked=0, Total=1482 [2020-10-12 15:49:35,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-12 15:49:35,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 62. [2020-10-12 15:49:35,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-12 15:49:35,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2020-10-12 15:49:35,047 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 54 [2020-10-12 15:49:35,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:49:35,047 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2020-10-12 15:49:35,047 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-12 15:49:35,047 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2020-10-12 15:49:35,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-12 15:49:35,048 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:49:35,048 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:49:35,048 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-12 15:49:35,048 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:49:35,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:49:35,049 INFO L82 PathProgramCache]: Analyzing trace with hash -6457065, now seen corresponding path program 22 times [2020-10-12 15:49:35,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:49:35,049 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2070944325] [2020-10-12 15:49:35,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:49:35,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:49:35,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:36,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:49:36,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-12 15:49:36,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:49:36,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 991 [2020-10-12 15:49:36,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:49:36,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-12 15:49:36,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:49:36,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-12 15:49:36,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:49:36,643 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2020-10-12 15:49:36,934 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 66 [2020-10-12 15:49:37,332 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2020-10-12 15:49:37,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:49:37,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:49:37,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:37,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:49:37,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:49:37,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:49:37,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:49:37,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:49:37,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:49:37,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:49:37,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:49:37,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:49:37,879 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 129 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:49:37,879 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2070944325] [2020-10-12 15:49:37,879 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:49:37,879 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-12 15:49:37,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162817663] [2020-10-12 15:49:37,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-12 15:49:37,880 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:49:37,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-12 15:49:37,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2020-10-12 15:49:37,881 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 25 states. [2020-10-12 15:49:38,875 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 87 [2020-10-12 15:49:39,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:49:39,758 INFO L93 Difference]: Finished difference Result 84 states and 86 transitions. [2020-10-12 15:49:39,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-12 15:49:39,758 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 56 [2020-10-12 15:49:39,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:49:39,759 INFO L225 Difference]: With dead ends: 84 [2020-10-12 15:49:39,759 INFO L226 Difference]: Without dead ends: 82 [2020-10-12 15:49:39,761 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=151, Invalid=1489, Unknown=0, NotChecked=0, Total=1640 [2020-10-12 15:49:39,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-12 15:49:39,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 65. [2020-10-12 15:49:39,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-12 15:49:39,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2020-10-12 15:49:39,770 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 56 [2020-10-12 15:49:39,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:49:39,770 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2020-10-12 15:49:39,770 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-12 15:49:39,771 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2020-10-12 15:49:39,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-12 15:49:39,771 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:49:39,771 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:49:39,771 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-12 15:49:39,771 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:49:39,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:49:39,772 INFO L82 PathProgramCache]: Analyzing trace with hash 338634808, now seen corresponding path program 23 times [2020-10-12 15:49:39,772 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:49:39,772 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1455938055] [2020-10-12 15:49:39,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:49:39,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:49:39,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:40,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:49:40,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-12 15:49:40,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:49:40,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 933 [2020-10-12 15:49:40,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:49:40,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-12 15:49:40,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:49:40,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-12 15:49:40,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:49:41,301 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2020-10-12 15:49:41,520 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-10-12 15:49:41,793 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 73 [2020-10-12 15:49:42,060 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 75 [2020-10-12 15:49:42,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:49:42,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:49:42,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:42,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:49:42,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:49:42,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:49:42,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:49:42,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:49:42,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:49:42,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:49:42,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:49:42,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:49:42,875 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 138 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:49:42,875 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1455938055] [2020-10-12 15:49:42,875 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:49:42,876 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-12 15:49:42,876 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142570478] [2020-10-12 15:49:42,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-12 15:49:42,876 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:49:42,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-12 15:49:42,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2020-10-12 15:49:42,877 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand 26 states. [2020-10-12 15:49:43,787 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 77 [2020-10-12 15:49:44,236 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 87 [2020-10-12 15:49:44,697 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 95 [2020-10-12 15:49:45,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:49:45,600 INFO L93 Difference]: Finished difference Result 104 states and 107 transitions. [2020-10-12 15:49:45,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-12 15:49:45,601 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 57 [2020-10-12 15:49:45,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:49:45,602 INFO L225 Difference]: With dead ends: 104 [2020-10-12 15:49:45,602 INFO L226 Difference]: Without dead ends: 102 [2020-10-12 15:49:45,604 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=169, Invalid=1723, Unknown=0, NotChecked=0, Total=1892 [2020-10-12 15:49:45,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-12 15:49:45,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 70. [2020-10-12 15:49:45,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-12 15:49:45,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 73 transitions. [2020-10-12 15:49:45,612 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 73 transitions. Word has length 57 [2020-10-12 15:49:45,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:49:45,613 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 73 transitions. [2020-10-12 15:49:45,613 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-12 15:49:45,613 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 73 transitions. [2020-10-12 15:49:45,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-12 15:49:45,614 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:49:45,614 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:49:45,614 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-12 15:49:45,614 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:49:45,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:49:45,614 INFO L82 PathProgramCache]: Analyzing trace with hash 915923199, now seen corresponding path program 24 times [2020-10-12 15:49:45,615 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:49:45,615 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1390501883] [2020-10-12 15:49:45,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:49:45,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:49:45,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:46,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:49:46,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-12 15:49:46,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:49:46,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1026 [2020-10-12 15:49:46,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:49:46,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-12 15:49:46,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:49:46,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-12 15:49:46,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:49:47,358 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2020-10-12 15:49:47,519 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2020-10-12 15:49:47,756 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 74 [2020-10-12 15:49:47,891 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 66 [2020-10-12 15:49:48,045 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 60 [2020-10-12 15:49:48,195 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2020-10-12 15:49:48,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:49:48,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:49:48,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:48,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:49:48,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:49:48,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:49:48,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:49:48,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:49:48,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:49:48,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:49:48,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:49:48,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:49:48,947 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 7 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:49:48,947 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1390501883] [2020-10-12 15:49:48,948 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:49:48,948 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-12 15:49:48,948 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876487542] [2020-10-12 15:49:48,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-12 15:49:48,948 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:49:48,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-12 15:49:48,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=544, Unknown=0, NotChecked=0, Total=600 [2020-10-12 15:49:48,949 INFO L87 Difference]: Start difference. First operand 70 states and 73 transitions. Second operand 25 states. [2020-10-12 15:49:49,914 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-12 15:49:50,344 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 88 [2020-10-12 15:49:51,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:49:51,162 INFO L93 Difference]: Finished difference Result 97 states and 100 transitions. [2020-10-12 15:49:51,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 15:49:51,162 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 59 [2020-10-12 15:49:51,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:49:51,163 INFO L225 Difference]: With dead ends: 97 [2020-10-12 15:49:51,163 INFO L226 Difference]: Without dead ends: 69 [2020-10-12 15:49:51,165 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=128, Invalid=1512, Unknown=0, NotChecked=0, Total=1640 [2020-10-12 15:49:51,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-12 15:49:51,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 66. [2020-10-12 15:49:51,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-12 15:49:51,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2020-10-12 15:49:51,175 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 59 [2020-10-12 15:49:51,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:49:51,175 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2020-10-12 15:49:51,175 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-12 15:49:51,176 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2020-10-12 15:49:51,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-12 15:49:51,176 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:49:51,176 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:49:51,176 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-12 15:49:51,177 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:49:51,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:49:51,177 INFO L82 PathProgramCache]: Analyzing trace with hash -603794882, now seen corresponding path program 25 times [2020-10-12 15:49:51,177 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:49:51,177 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1487102063] [2020-10-12 15:49:51,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:49:51,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:49:51,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:52,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:49:52,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-12 15:49:52,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:49:52,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1283 [2020-10-12 15:49:52,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:49:52,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-12 15:49:52,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:49:52,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-12 15:49:52,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:49:52,952 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 50 [2020-10-12 15:49:53,163 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 59 [2020-10-12 15:49:53,446 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 72 [2020-10-12 15:49:53,738 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 82 [2020-10-12 15:49:53,937 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 82 [2020-10-12 15:49:54,144 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 70 [2020-10-12 15:49:54,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:49:54,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:49:54,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:54,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:49:54,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:49:54,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:49:54,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:49:54,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:49:54,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:49:54,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:49:54,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:49:54,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:49:54,815 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:49:54,816 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1487102063] [2020-10-12 15:49:54,816 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:49:54,816 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-12 15:49:54,816 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031343653] [2020-10-12 15:49:54,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-12 15:49:54,817 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:49:54,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-12 15:49:54,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=636, Unknown=0, NotChecked=0, Total=702 [2020-10-12 15:49:54,817 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 27 states. [2020-10-12 15:49:55,694 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 78 [2020-10-12 15:49:55,885 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2020-10-12 15:49:56,169 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 86 [2020-10-12 15:49:56,412 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2020-10-12 15:49:56,732 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 98 [2020-10-12 15:49:57,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:49:57,702 INFO L93 Difference]: Finished difference Result 88 states and 90 transitions. [2020-10-12 15:49:57,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-12 15:49:57,703 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 60 [2020-10-12 15:49:57,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:49:57,704 INFO L225 Difference]: With dead ends: 88 [2020-10-12 15:49:57,704 INFO L226 Difference]: Without dead ends: 86 [2020-10-12 15:49:57,706 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=171, Invalid=1899, Unknown=0, NotChecked=0, Total=2070 [2020-10-12 15:49:57,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-12 15:49:57,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 69. [2020-10-12 15:49:57,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-12 15:49:57,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2020-10-12 15:49:57,715 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 60 [2020-10-12 15:49:57,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:49:57,716 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2020-10-12 15:49:57,716 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-12 15:49:57,716 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2020-10-12 15:49:57,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-12 15:49:57,716 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:49:57,716 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:49:57,716 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-12 15:49:57,716 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:49:57,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:49:57,717 INFO L82 PathProgramCache]: Analyzing trace with hash -998968335, now seen corresponding path program 26 times [2020-10-12 15:49:57,717 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:49:57,717 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1882727474] [2020-10-12 15:49:57,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:49:57,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:49:57,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:49:59,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:49:59,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-12 15:49:59,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:49:59,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1359 [2020-10-12 15:49:59,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:49:59,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-12 15:49:59,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:49:59,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-12 15:49:59,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:49:59,530 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2020-10-12 15:49:59,697 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2020-10-12 15:49:59,943 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 73 [2020-10-12 15:50:00,107 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 70 [2020-10-12 15:50:00,338 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 81 [2020-10-12 15:50:01,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:50:01,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:50:01,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:50:01,236 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:50:01,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:50:01,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:50:01,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:50:01,237 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:50:01,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:50:01,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:50:01,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:50:01,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:50:01,285 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 166 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-12 15:50:01,285 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1882727474] [2020-10-12 15:50:01,285 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:50:01,285 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-12 15:50:01,285 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183876504] [2020-10-12 15:50:01,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-12 15:50:01,286 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:50:01,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-12 15:50:01,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2020-10-12 15:50:01,286 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand 27 states. [2020-10-12 15:50:02,161 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 77 [2020-10-12 15:50:02,360 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2020-10-12 15:50:02,596 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 77 [2020-10-12 15:50:02,857 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 87 [2020-10-12 15:50:03,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:50:03,505 INFO L93 Difference]: Finished difference Result 89 states and 91 transitions. [2020-10-12 15:50:03,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-12 15:50:03,506 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 61 [2020-10-12 15:50:03,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:50:03,506 INFO L225 Difference]: With dead ends: 89 [2020-10-12 15:50:03,507 INFO L226 Difference]: Without dead ends: 87 [2020-10-12 15:50:03,508 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=156, Invalid=1566, Unknown=0, NotChecked=0, Total=1722 [2020-10-12 15:50:03,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-12 15:50:03,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 69. [2020-10-12 15:50:03,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-12 15:50:03,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2020-10-12 15:50:03,520 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 61 [2020-10-12 15:50:03,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:50:03,520 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2020-10-12 15:50:03,520 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-12 15:50:03,520 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2020-10-12 15:50:03,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-12 15:50:03,521 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:50:03,521 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:50:03,521 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-12 15:50:03,522 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:50:03,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:50:03,522 INFO L82 PathProgramCache]: Analyzing trace with hash -325475720, now seen corresponding path program 27 times [2020-10-12 15:50:03,522 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:50:03,522 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [105998922] [2020-10-12 15:50:03,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:50:03,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:50:03,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:50:05,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:50:05,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-12 15:50:05,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:50:05,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1491 [2020-10-12 15:50:05,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:50:05,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-12 15:50:05,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:50:05,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-12 15:50:05,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:50:05,778 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 49 [2020-10-12 15:50:06,092 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 60 [2020-10-12 15:50:06,386 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 67 [2020-10-12 15:50:06,552 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 61 [2020-10-12 15:50:06,809 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 82 [2020-10-12 15:50:06,998 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 77 [2020-10-12 15:50:07,187 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 67 [2020-10-12 15:50:07,379 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 64 [2020-10-12 15:50:08,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:50:08,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:50:08,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:50:08,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:50:08,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:50:08,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:50:08,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:50:08,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:50:08,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:50:08,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:50:08,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:50:08,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:50:08,266 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:50:08,267 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [105998922] [2020-10-12 15:50:08,267 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:50:08,267 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-12 15:50:08,267 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675201117] [2020-10-12 15:50:08,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-12 15:50:08,267 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:50:08,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-12 15:50:08,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=700, Unknown=0, NotChecked=0, Total=756 [2020-10-12 15:50:08,268 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand 28 states. [2020-10-12 15:50:09,020 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 58 [2020-10-12 15:50:09,380 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 67 [2020-10-12 15:50:09,809 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 78 [2020-10-12 15:50:10,321 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 90 [2020-10-12 15:50:10,583 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2020-10-12 15:50:10,920 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 104 [2020-10-12 15:50:12,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:50:12,308 INFO L93 Difference]: Finished difference Result 94 states and 96 transitions. [2020-10-12 15:50:12,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-12 15:50:12,309 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 63 [2020-10-12 15:50:12,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:50:12,310 INFO L225 Difference]: With dead ends: 94 [2020-10-12 15:50:12,310 INFO L226 Difference]: Without dead ends: 92 [2020-10-12 15:50:12,312 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=185, Invalid=2467, Unknown=0, NotChecked=0, Total=2652 [2020-10-12 15:50:12,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-12 15:50:12,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 72. [2020-10-12 15:50:12,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-12 15:50:12,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2020-10-12 15:50:12,326 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 63 [2020-10-12 15:50:12,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:50:12,326 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2020-10-12 15:50:12,326 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-12 15:50:12,326 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2020-10-12 15:50:12,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-12 15:50:12,327 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:50:12,327 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:50:12,327 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-12 15:50:12,327 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:50:12,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:50:12,328 INFO L82 PathProgramCache]: Analyzing trace with hash -432455707, now seen corresponding path program 28 times [2020-10-12 15:50:12,328 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:50:12,328 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [261738183] [2020-10-12 15:50:12,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:50:12,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:50:12,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:50:13,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:50:13,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-12 15:50:13,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:50:13,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1490 [2020-10-12 15:50:13,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:50:13,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-12 15:50:13,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:50:13,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-12 15:50:13,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:50:14,643 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2020-10-12 15:50:14,882 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 72 [2020-10-12 15:50:15,083 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 66 [2020-10-12 15:50:15,323 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 82 [2020-10-12 15:50:15,485 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 76 [2020-10-12 15:50:15,817 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 91 [2020-10-12 15:50:16,022 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 85 [2020-10-12 15:50:16,197 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 72 [2020-10-12 15:50:17,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:50:17,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:50:17,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:50:17,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:50:17,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:50:17,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:50:17,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:50:17,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:50:17,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:50:17,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:50:17,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:50:17,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:50:17,123 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 185 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:50:17,123 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [261738183] [2020-10-12 15:50:17,123 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:50:17,124 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-12 15:50:17,124 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238378676] [2020-10-12 15:50:17,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-12 15:50:17,124 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:50:17,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-12 15:50:17,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=741, Unknown=0, NotChecked=0, Total=812 [2020-10-12 15:50:17,125 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand 29 states. [2020-10-12 15:50:17,979 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 70 [2020-10-12 15:50:18,385 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 77 [2020-10-12 15:50:18,579 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-12 15:50:18,856 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 87 [2020-10-12 15:50:19,069 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-12 15:50:19,415 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 102 [2020-10-12 15:50:19,781 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 107 [2020-10-12 15:50:20,201 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 111 [2020-10-12 15:50:20,761 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 69 [2020-10-12 15:50:21,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:50:21,396 INFO L93 Difference]: Finished difference Result 117 states and 120 transitions. [2020-10-12 15:50:21,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-12 15:50:21,397 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 64 [2020-10-12 15:50:21,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:50:21,398 INFO L225 Difference]: With dead ends: 117 [2020-10-12 15:50:21,399 INFO L226 Difference]: Without dead ends: 115 [2020-10-12 15:50:21,400 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 513 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=204, Invalid=2346, Unknown=0, NotChecked=0, Total=2550 [2020-10-12 15:50:21,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-12 15:50:21,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 77. [2020-10-12 15:50:21,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-12 15:50:21,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 80 transitions. [2020-10-12 15:50:21,415 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 80 transitions. Word has length 64 [2020-10-12 15:50:21,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:50:21,415 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 80 transitions. [2020-10-12 15:50:21,416 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-12 15:50:21,416 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 80 transitions. [2020-10-12 15:50:21,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-12 15:50:21,416 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:50:21,416 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:50:21,417 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-12 15:50:21,417 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:50:21,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:50:21,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1793798142, now seen corresponding path program 29 times [2020-10-12 15:50:21,417 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:50:21,417 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1182968773] [2020-10-12 15:50:21,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:50:21,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:50:21,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:50:22,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:50:22,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-12 15:50:22,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:50:22,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1284 [2020-10-12 15:50:22,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:50:22,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-12 15:50:22,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:50:22,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-12 15:50:22,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:50:23,329 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2020-10-12 15:50:23,571 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 63 [2020-10-12 15:50:23,914 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 72 [2020-10-12 15:50:24,057 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2020-10-12 15:50:24,322 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 83 [2020-10-12 15:50:24,491 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 77 [2020-10-12 15:50:24,685 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 67 [2020-10-12 15:50:25,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:50:25,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:50:25,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:50:25,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:50:25,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:50:25,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:50:25,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:50:25,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:50:25,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:50:25,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:50:25,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:50:25,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:50:25,708 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 8 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:50:25,708 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1182968773] [2020-10-12 15:50:25,708 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:50:25,708 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-12 15:50:25,709 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586723325] [2020-10-12 15:50:25,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-12 15:50:25,709 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:50:25,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-12 15:50:25,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2020-10-12 15:50:25,709 INFO L87 Difference]: Start difference. First operand 77 states and 80 transitions. Second operand 28 states. [2020-10-12 15:50:26,227 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 64 [2020-10-12 15:50:26,614 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-12 15:50:26,820 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-12 15:50:27,072 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-10-12 15:50:27,288 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-12 15:50:27,629 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 98 [2020-10-12 15:50:28,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:50:28,712 INFO L93 Difference]: Finished difference Result 107 states and 110 transitions. [2020-10-12 15:50:28,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-12 15:50:28,713 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 66 [2020-10-12 15:50:28,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:50:28,714 INFO L225 Difference]: With dead ends: 107 [2020-10-12 15:50:28,714 INFO L226 Difference]: Without dead ends: 76 [2020-10-12 15:50:28,716 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=141, Invalid=1839, Unknown=0, NotChecked=0, Total=1980 [2020-10-12 15:50:28,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-12 15:50:28,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 73. [2020-10-12 15:50:28,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-12 15:50:28,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2020-10-12 15:50:28,727 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 66 [2020-10-12 15:50:28,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:50:28,727 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2020-10-12 15:50:28,728 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-12 15:50:28,728 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2020-10-12 15:50:28,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-12 15:50:28,728 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:50:28,729 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:50:28,729 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-12 15:50:28,729 INFO L427 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:50:28,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:50:28,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1618739057, now seen corresponding path program 30 times [2020-10-12 15:50:28,729 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:50:28,730 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1540337727] [2020-10-12 15:50:28,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:50:28,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:50:28,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:50:30,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:50:30,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-12 15:50:30,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:50:30,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1895 [2020-10-12 15:50:30,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:50:30,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-12 15:50:30,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:50:30,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-12 15:50:30,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:50:31,475 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 64 [2020-10-12 15:50:31,846 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 73 [2020-10-12 15:50:32,221 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 82 [2020-10-12 15:50:32,387 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 77 [2020-10-12 15:50:32,671 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 93 [2020-10-12 15:50:33,102 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 68 [2020-10-12 15:50:33,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:50:33,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:50:33,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:50:33,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:50:33,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:50:33,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:50:33,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:50:33,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:50:33,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:50:33,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:50:33,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:50:33,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:50:33,953 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 0 proven. 205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:50:33,954 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1540337727] [2020-10-12 15:50:33,954 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:50:33,954 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-12 15:50:33,954 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420902059] [2020-10-12 15:50:33,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-12 15:50:33,955 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:50:33,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-12 15:50:33,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=801, Unknown=0, NotChecked=0, Total=870 [2020-10-12 15:50:33,956 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand 30 states. [2020-10-12 15:50:34,834 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 65 [2020-10-12 15:50:35,298 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75 [2020-10-12 15:50:35,762 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 85 [2020-10-12 15:50:35,993 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-12 15:50:36,300 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 95 [2020-10-12 15:50:36,535 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 86 [2020-10-12 15:50:36,948 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 116 [2020-10-12 15:50:38,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:50:38,236 INFO L93 Difference]: Finished difference Result 98 states and 100 transitions. [2020-10-12 15:50:38,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-12 15:50:38,237 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 67 [2020-10-12 15:50:38,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:50:38,238 INFO L225 Difference]: With dead ends: 98 [2020-10-12 15:50:38,238 INFO L226 Difference]: Without dead ends: 96 [2020-10-12 15:50:38,240 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=200, Invalid=2662, Unknown=0, NotChecked=0, Total=2862 [2020-10-12 15:50:38,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-12 15:50:38,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 76. [2020-10-12 15:50:38,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-12 15:50:38,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2020-10-12 15:50:38,259 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 67 [2020-10-12 15:50:38,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:50:38,260 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2020-10-12 15:50:38,260 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-12 15:50:38,260 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2020-10-12 15:50:38,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-12 15:50:38,261 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:50:38,261 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:50:38,261 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-12 15:50:38,261 INFO L427 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:50:38,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:50:38,261 INFO L82 PathProgramCache]: Analyzing trace with hash -291339764, now seen corresponding path program 31 times [2020-10-12 15:50:38,262 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:50:38,262 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [242170325] [2020-10-12 15:50:38,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:50:38,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:50:38,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:50:41,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:50:41,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-12 15:50:41,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:50:41,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2923 [2020-10-12 15:50:41,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:50:41,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-12 15:50:41,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:50:41,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-12 15:50:41,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:50:42,321 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 59 [2020-10-12 15:50:42,636 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 68 [2020-10-12 15:50:42,805 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 63 [2020-10-12 15:50:43,048 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 84 [2020-10-12 15:50:43,229 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 78 [2020-10-12 15:50:43,507 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 90 [2020-10-12 15:50:43,701 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 82 [2020-10-12 15:50:43,969 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 92 [2020-10-12 15:50:44,238 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 88 [2020-10-12 15:50:44,494 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 75 [2020-10-12 15:50:44,692 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 62 [2020-10-12 15:50:45,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:50:45,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:50:45,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:50:45,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:50:45,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:50:45,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:50:45,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:50:45,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:50:45,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:50:45,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:50:45,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:50:45,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:50:45,713 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 0 proven. 219 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:50:45,714 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [242170325] [2020-10-12 15:50:45,714 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:50:45,714 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-12 15:50:45,714 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297686246] [2020-10-12 15:50:45,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-12 15:50:45,715 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:50:45,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-12 15:50:45,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=850, Unknown=0, NotChecked=0, Total=930 [2020-10-12 15:50:45,715 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 31 states. [2020-10-12 15:50:46,648 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2020-10-12 15:50:46,971 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2020-10-12 15:50:47,404 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 93 [2020-10-12 15:50:47,651 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 76 [2020-10-12 15:50:47,950 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 87 [2020-10-12 15:50:48,198 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 79 [2020-10-12 15:50:48,638 WARN L193 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 116 [2020-10-12 15:50:49,265 WARN L193 SmtUtils]: Spent 491.00 ms on a formula simplification. DAG size of input: 263 DAG size of output: 128 [2020-10-12 15:50:49,939 WARN L193 SmtUtils]: Spent 534.00 ms on a formula simplification. DAG size of input: 269 DAG size of output: 132 [2020-10-12 15:50:51,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:50:51,014 INFO L93 Difference]: Finished difference Result 99 states and 101 transitions. [2020-10-12 15:50:51,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-12 15:50:51,015 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 68 [2020-10-12 15:50:51,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:50:51,016 INFO L225 Difference]: With dead ends: 99 [2020-10-12 15:50:51,016 INFO L226 Difference]: Without dead ends: 97 [2020-10-12 15:50:51,018 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=203, Invalid=2347, Unknown=0, NotChecked=0, Total=2550 [2020-10-12 15:50:51,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-12 15:50:51,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 76. [2020-10-12 15:50:51,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-12 15:50:51,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2020-10-12 15:50:51,029 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 68 [2020-10-12 15:50:51,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:50:51,030 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2020-10-12 15:50:51,030 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-12 15:50:51,030 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2020-10-12 15:50:51,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-12 15:50:51,030 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:50:51,030 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:50:51,031 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-12 15:50:51,031 INFO L427 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:50:51,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:50:51,031 INFO L82 PathProgramCache]: Analyzing trace with hash -32734107, now seen corresponding path program 32 times [2020-10-12 15:50:51,031 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:50:51,031 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2041695895] [2020-10-12 15:50:51,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:50:51,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:50:51,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:50:52,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:50:52,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-12 15:50:52,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:50:52,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1619 [2020-10-12 15:50:52,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:50:52,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-12 15:50:52,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:50:52,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-12 15:50:52,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:50:53,895 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2020-10-12 15:50:54,177 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 73 [2020-10-12 15:50:54,559 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 89 [2020-10-12 15:50:55,074 WARN L193 SmtUtils]: Spent 464.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 101 [2020-10-12 15:50:55,785 WARN L193 SmtUtils]: Spent 608.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 118 [2020-10-12 15:50:56,489 WARN L193 SmtUtils]: Spent 624.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 145 [2020-10-12 15:50:58,001 WARN L193 SmtUtils]: Spent 1.39 s on a formula simplification. DAG size of input: 179 DAG size of output: 158 [2020-10-12 15:50:59,565 WARN L193 SmtUtils]: Spent 1.43 s on a formula simplification. DAG size of input: 272 DAG size of output: 212 [2020-10-12 15:51:02,070 WARN L193 SmtUtils]: Spent 2.30 s on a formula simplification. DAG size of input: 223 DAG size of output: 172 [2020-10-12 15:51:02,321 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 70 [2020-10-12 15:51:03,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:51:03,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:51:03,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:51:03,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:51:03,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:51:03,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:51:03,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:51:03,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:51:03,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:51:03,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:51:03,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:51:03,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:51:03,665 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 0 proven. 228 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:51:03,665 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2041695895] [2020-10-12 15:51:03,665 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:51:03,665 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-12 15:51:03,665 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276021632] [2020-10-12 15:51:03,666 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-12 15:51:03,666 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:51:03,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-12 15:51:03,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=863, Unknown=0, NotChecked=0, Total=930 [2020-10-12 15:51:03,666 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 31 states. [2020-10-12 15:51:04,421 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 58 [2020-10-12 15:51:04,925 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 65 [2020-10-12 15:51:05,250 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2020-10-12 15:51:06,228 WARN L193 SmtUtils]: Spent 801.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 111 [2020-10-12 15:51:06,813 WARN L193 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 102 [2020-10-12 15:51:09,038 WARN L193 SmtUtils]: Spent 2.01 s on a formula simplification. DAG size of input: 208 DAG size of output: 149 [2020-10-12 15:51:10,030 WARN L193 SmtUtils]: Spent 625.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 146 [2020-10-12 15:51:16,726 WARN L193 SmtUtils]: Spent 6.42 s on a formula simplification. DAG size of input: 292 DAG size of output: 207 [2020-10-12 15:51:18,673 WARN L193 SmtUtils]: Spent 1.48 s on a formula simplification. DAG size of input: 215 DAG size of output: 213 [2020-10-12 15:51:33,090 WARN L193 SmtUtils]: Spent 13.92 s on a formula simplification. DAG size of input: 377 DAG size of output: 317 [2020-10-12 15:51:36,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:51:36,140 INFO L93 Difference]: Finished difference Result 104 states and 106 transitions. [2020-10-12 15:51:36,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-12 15:51:36,142 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 70 [2020-10-12 15:51:36,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:51:36,143 INFO L225 Difference]: With dead ends: 104 [2020-10-12 15:51:36,143 INFO L226 Difference]: Without dead ends: 102 [2020-10-12 15:51:36,145 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 38.7s TimeCoverageRelationStatistics Valid=200, Invalid=2880, Unknown=0, NotChecked=0, Total=3080 [2020-10-12 15:51:36,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-12 15:51:36,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 79. [2020-10-12 15:51:36,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-12 15:51:36,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 81 transitions. [2020-10-12 15:51:36,160 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 81 transitions. Word has length 70 [2020-10-12 15:51:36,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:51:36,160 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 81 transitions. [2020-10-12 15:51:36,160 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-12 15:51:36,161 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 81 transitions. [2020-10-12 15:51:36,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-12 15:51:36,161 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:51:36,161 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:51:36,161 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-12 15:51:36,162 INFO L427 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:51:36,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:51:36,162 INFO L82 PathProgramCache]: Analyzing trace with hash 830814186, now seen corresponding path program 33 times [2020-10-12 15:51:36,162 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:51:36,162 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [20320360] [2020-10-12 15:51:36,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:51:36,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:51:36,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:51:38,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:51:38,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-12 15:51:38,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:51:38,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2233 [2020-10-12 15:51:38,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:51:38,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-12 15:51:38,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:51:38,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-12 15:51:38,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:51:39,093 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2020-10-12 15:51:39,312 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2020-10-12 15:51:39,592 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2020-10-12 15:51:39,936 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 72 [2020-10-12 15:51:40,401 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 82 [2020-10-12 15:51:40,729 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 76 [2020-10-12 15:51:41,138 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 91 [2020-10-12 15:51:41,602 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-10-12 15:51:41,968 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 94 [2020-10-12 15:51:42,381 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 79 [2020-10-12 15:51:42,686 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 68 [2020-10-12 15:51:42,914 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2020-10-12 15:51:43,144 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2020-10-12 15:51:43,376 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2020-10-12 15:51:43,612 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 39 [2020-10-12 15:51:43,832 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 34 [2020-10-12 15:51:44,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:51:44,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:51:44,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:51:44,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:51:44,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:51:44,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:51:44,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:51:44,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:51:44,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:51:44,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:51:44,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:51:44,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:51:44,591 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 0 proven. 239 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:51:44,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [20320360] [2020-10-12 15:51:44,592 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:51:44,592 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-12 15:51:44,592 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226828806] [2020-10-12 15:51:44,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-12 15:51:44,593 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:51:44,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-12 15:51:44,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=916, Unknown=0, NotChecked=0, Total=992 [2020-10-12 15:51:44,594 INFO L87 Difference]: Start difference. First operand 79 states and 81 transitions. Second operand 32 states. [2020-10-12 15:51:45,205 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 43 [2020-10-12 15:51:45,679 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2020-10-12 15:51:46,253 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 67 [2020-10-12 15:51:46,506 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 56 [2020-10-12 15:51:46,982 WARN L193 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 77 [2020-10-12 15:51:47,355 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-12 15:51:47,817 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 87 [2020-10-12 15:51:48,158 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-12 15:51:48,676 WARN L193 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 97 [2020-10-12 15:51:49,026 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 86 [2020-10-12 15:51:49,653 WARN L193 SmtUtils]: Spent 479.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 116 [2020-10-12 15:51:50,327 WARN L193 SmtUtils]: Spent 475.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 112 [2020-10-12 15:51:51,068 WARN L193 SmtUtils]: Spent 545.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 116 [2020-10-12 15:51:52,071 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-12 15:51:53,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:51:53,359 INFO L93 Difference]: Finished difference Result 130 states and 133 transitions. [2020-10-12 15:51:53,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-12 15:51:53,361 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 71 [2020-10-12 15:51:53,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:51:53,362 INFO L225 Difference]: With dead ends: 130 [2020-10-12 15:51:53,363 INFO L226 Difference]: Without dead ends: 128 [2020-10-12 15:51:53,364 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=240, Invalid=3182, Unknown=0, NotChecked=0, Total=3422 [2020-10-12 15:51:53,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-12 15:51:53,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 84. [2020-10-12 15:51:53,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-12 15:51:53,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 87 transitions. [2020-10-12 15:51:53,382 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 87 transitions. Word has length 71 [2020-10-12 15:51:53,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:51:53,383 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 87 transitions. [2020-10-12 15:51:53,383 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-12 15:51:53,383 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 87 transitions. [2020-10-12 15:51:53,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-12 15:51:53,384 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:51:53,384 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:51:53,384 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-12 15:51:53,384 INFO L427 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:51:53,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:51:53,384 INFO L82 PathProgramCache]: Analyzing trace with hash -219387151, now seen corresponding path program 34 times [2020-10-12 15:51:53,385 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:51:53,385 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1500157856] [2020-10-12 15:51:53,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:51:53,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:51:53,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:51:55,220 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:51:55,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-12 15:51:55,221 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:51:55,221 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1743 [2020-10-12 15:51:55,221 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:51:55,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-12 15:51:55,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:51:55,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-12 15:51:55,221 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:51:55,598 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2020-10-12 15:51:55,815 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2020-10-12 15:51:56,111 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2020-10-12 15:51:56,479 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 72 [2020-10-12 15:51:56,743 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 71 [2020-10-12 15:51:57,163 WARN L193 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 86 [2020-10-12 15:51:57,395 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 77 [2020-10-12 15:51:57,749 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 92 [2020-10-12 15:51:58,026 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 86 [2020-10-12 15:51:58,373 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 74 [2020-10-12 15:51:58,619 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 69 [2020-10-12 15:52:00,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:52:00,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:00,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:00,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:00,142 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:52:00,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:52:00,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:52:00,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:00,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:52:00,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:52:00,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:52:00,143 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:52:00,215 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 9 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:52:00,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1500157856] [2020-10-12 15:52:00,216 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:52:00,216 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-12 15:52:00,216 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878416639] [2020-10-12 15:52:00,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-12 15:52:00,216 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:52:00,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-12 15:52:00,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=856, Unknown=0, NotChecked=0, Total=930 [2020-10-12 15:52:00,217 INFO L87 Difference]: Start difference. First operand 84 states and 87 transitions. Second operand 31 states. [2020-10-12 15:52:01,350 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 73 [2020-10-12 15:52:01,688 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2020-10-12 15:52:02,104 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81 [2020-10-12 15:52:02,449 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-10-12 15:52:02,938 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 91 [2020-10-12 15:52:03,293 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 86 [2020-10-12 15:52:03,881 WARN L193 SmtUtils]: Spent 449.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 112 [2020-10-12 15:52:05,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:52:05,798 INFO L93 Difference]: Finished difference Result 117 states and 120 transitions. [2020-10-12 15:52:05,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-12 15:52:05,800 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 73 [2020-10-12 15:52:05,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:52:05,801 INFO L225 Difference]: With dead ends: 117 [2020-10-12 15:52:05,801 INFO L226 Difference]: Without dead ends: 83 [2020-10-12 15:52:05,802 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=154, Invalid=2198, Unknown=0, NotChecked=0, Total=2352 [2020-10-12 15:52:05,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-12 15:52:05,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 80. [2020-10-12 15:52:05,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-12 15:52:05,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2020-10-12 15:52:05,819 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 73 [2020-10-12 15:52:05,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:52:05,819 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2020-10-12 15:52:05,819 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-12 15:52:05,819 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2020-10-12 15:52:05,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-12 15:52:05,820 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:52:05,820 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:52:05,820 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-12 15:52:05,820 INFO L427 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:52:05,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:52:05,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1106293428, now seen corresponding path program 35 times [2020-10-12 15:52:05,821 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:52:05,821 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [784400482] [2020-10-12 15:52:05,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:52:05,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:06,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:08,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:08,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-12 15:52:08,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:52:08,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2223 [2020-10-12 15:52:08,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:08,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-12 15:52:08,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 15:52:08,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-12 15:52:08,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:52:08,978 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2020-10-12 15:52:09,291 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2020-10-12 15:52:09,639 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2020-10-12 15:52:10,231 WARN L193 SmtUtils]: Spent 519.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 76 [2020-10-12 15:52:10,651 WARN L193 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 67 [2020-10-12 15:52:11,234 WARN L193 SmtUtils]: Spent 496.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 85 [2020-10-12 15:52:11,454 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 77 [2020-10-12 15:52:11,826 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 92 [2020-10-12 15:52:12,142 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 87 [2020-10-12 15:52:12,668 WARN L193 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 102 [2020-10-12 15:52:12,896 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-10-12 15:52:13,205 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-10-12 15:52:13,766 WARN L193 SmtUtils]: Spent 427.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 76 [2020-10-12 15:52:13,986 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2020-10-12 15:52:14,217 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2020-10-12 15:52:14,437 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 45 [2020-10-12 15:52:14,882 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2020-10-12 15:52:15,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:52:15,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:15,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:52:15,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:52:15,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:52:15,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:52:15,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 15:52:15,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:52:15,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:52:15,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:52:15,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:52:15,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 15:52:15,785 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 0 proven. 262 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:52:15,785 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [784400482] [2020-10-12 15:52:15,785 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 15:52:15,785 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-12 15:52:15,785 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319929115] [2020-10-12 15:52:15,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-12 15:52:15,786 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:52:15,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-12 15:52:15,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=978, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 15:52:15,786 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 33 states. [2020-10-12 15:52:16,596 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-10-12 15:52:17,047 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2020-10-12 15:52:17,582 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2020-10-12 15:52:18,229 WARN L193 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 80 [2020-10-12 15:52:18,631 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 68 [2020-10-12 15:52:19,180 WARN L193 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 97 [2020-10-12 15:52:19,670 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2020-10-12 15:52:20,308 WARN L193 SmtUtils]: Spent 454.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 109 [2020-10-12 15:52:20,815 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 88 [2020-10-12 15:52:21,544 WARN L193 SmtUtils]: Spent 548.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 123 [2020-10-12 15:52:22,054 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 98 [2020-10-12 15:52:22,826 WARN L193 SmtUtils]: Spent 573.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 128 [2020-10-12 15:52:23,189 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-10-12 15:52:23,540 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 85 [2020-10-12 15:52:25,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:52:25,837 INFO L93 Difference]: Finished difference Result 108 states and 110 transitions. [2020-10-12 15:52:25,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-12 15:52:25,839 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 74 [2020-10-12 15:52:25,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:52:25,840 INFO L225 Difference]: With dead ends: 108 [2020-10-12 15:52:25,840 INFO L226 Difference]: Without dead ends: 106 [2020-10-12 15:52:25,841 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=220, Invalid=3086, Unknown=0, NotChecked=0, Total=3306 [2020-10-12 15:52:25,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-12 15:52:25,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 83. [2020-10-12 15:52:25,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-12 15:52:25,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2020-10-12 15:52:25,863 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 74 [2020-10-12 15:52:25,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:52:25,863 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2020-10-12 15:52:25,864 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-12 15:52:25,864 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2020-10-12 15:52:25,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-12 15:52:25,865 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:52:25,865 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:52:25,865 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-12 15:52:25,865 INFO L427 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:52:25,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:52:25,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1910213603, now seen corresponding path program 36 times [2020-10-12 15:52:25,866 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:52:25,866 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1859918917] [2020-10-12 15:52:25,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:52:26,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:52:26,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking...